Patent Description:
Imaging devices are used in a variety of industries to optically record or interpret visual data. The quality of the optical record can depend on a variety of factors including, but not limited to, the lighting that illuminates the visual data. Uneven lighting can negatively impact the quality of the visual data that is observed or recorded, which may negatively impact how the visual data is interpreted.

One example type of imaging device that is dependent on the quality of the lighting is an imaging device for biological growth plates. Biological growth plates can be used to test for biological contaminants in foods, medical samples, and other sources. For example, a food sample or laboratory sample can be placed on a biological growth plate, and then the plate can be inserted into an incubation chamber. After incubation, the biological growth plate can be placed into the imaging device for detection and enumeration of bacterial growth. The imaging device is used to scan or count bacterial colonies, or the amount of a particular biological agent, on the biological growth plate. The imaging device can automate the detection and enumeration of bacteria or other biological agents on a biological growth plate, and thereby improve the biological testing process by reducing human error.

<CIT> relates to an image analysis device, an image analysis method, a program, and an illumination device and particularly relates to an image analysis device, an image analysis method, a program, and an illumination device which are suitably used to analyze, for example, a state of human skin.

<CIT> relates generally to optical imaging systems, and more particularly, relates to fluorescent illumination sources and their associated components to illuminate targeted fluorescent probes in tissue.

The present invention according to claim <NUM> relates to an imaging device. The imaging device has a support plate defining an object plane. A housing surrounds the object plane across the support plate. A first reflector plane is within the housing. The first reflector plane is <NUM>° to <NUM>° from the object plane. The first reflector plane is in reflective communication with the object plane. A second reflector plane is within the housing. The second reflector plane is <NUM>° to <NUM>° from the object plane. The second reflector plane is in reflective communication with the object plane.

In some such embodiments, each of the first reflector plane and the second reflector plane each have a distal end relative to the object plane, and the distal end of the first reflector plane is <NUM> to <NUM> from the distal end of the second reflector plane. Additionally or alternatively, a distance between a distal end of the first reflector plane and the object plane is <NUM> to <NUM>. Additionally or alternatively, an image capture device is coupled to the housing. The image capture device has an optical lens. A distance between the optical lens and the object plane is <NUM> to <NUM>. Additionally or alternatively, the first reflector plane has a length of at least <NUM> in a direction parallel to the object plane.

Additionally or alternatively, the imaging device has a back illumination device coupled to the housing. The back illumination device has a back emitter face opposite the object plane relative to the support plate, where the back emitter face is <NUM> to <NUM> from the object plane, and the back emitter face is configured to transmit diffuse light through the object plane. Additionally or alternatively, the first reflector plane and second reflector plane each have a gloss of <NUM>-<NUM> at a <NUM>° angle, in accordance with ASTM D <NUM>-<NUM>. Additionally or alternatively, the imaging device has a first waveguide coupled to the housing, where the first waveguide has a first interior reflective surface, and the first waveguide defines a first optical inlet through the first interior reflective surface and a first optical outlet through the first interior reflective surface. Additionally or alternatively, the first optical outlet is <NUM>° to <NUM>° from the object plane.

Additionally or alternatively, the imaging device has a first light source coupled to the first waveguide about the first optical inlet, wherein the first light source defines a first source emitter face that is radially outward from the first interior reflective surface relative to the first central axis. Additionally or alternatively, the first source emitter face is <NUM> to <NUM> radially outward from the first interior reflective surface relative to the first central axis.

Additionally or alternatively, the imaging device has a second waveguide coupled to the housing, where the second waveguide has a second interior reflective surface, and the second waveguide defines a second optical inlet through the second interior reflective surface and a second optical outlet through the second interior reflective surface. Additionally or alternatively, the second optical outlet is <NUM>° to <NUM>° from the object plane. Additionally or alternatively, a second light source is coupled to the second waveguide about the second optical outlet, where the second light source defines a second source emitter face that is radially outward from the second interior reflective surface relative to the second central axis. Additionally or alternatively, the second source emitter face is <NUM> to <NUM> radially outward from the second interior reflective surface relative to the second central axis.

Additionally or alternatively, the first waveguide defines a first central axis that is <NUM> to <NUM> from a second central axis defined by the second waveguide. Additionally or alternatively, a distance between the object plane and a first central axis defined by the first waveguide is <NUM> to <NUM>.

Some embodiments of the technology disclosed herein relate to an imaging device having a support plate defining an object plane. a housing surrounds the object plane across the support plate. A first waveguide is coupled to the housing, where the first waveguide has a first interior reflective surface. The first waveguide defines a first optical inlet through the first interior reflective surface and a first optical outlet through the first interior reflective surface, where the first optical outlet is <NUM>° to <NUM>° from the object plane. A second waveguide is coupled to the housing, where the second waveguide has a second interior reflective surface. The second waveguide defines a second optical inlet through the second interior reflective surface and a second optical outlet through the second interior reflective surface. The second optical outlet is <NUM>° to <NUM>° from the object plane.

In some such embodiments the first waveguide defines a first central axis that is <NUM> to <NUM> from a second central axis defined by the second waveguide. Additionally or alternatively, a distance between the object plane and a central axis defined by the first waveguide is <NUM> to <NUM>. Additionally or alternatively, a first light source is coupled to the first waveguide about the first optical inlet, where the first light source defines a first source emitter face that is radially outward from the first interior reflective surface relative to the first central axis. Additionally or alternatively, the first source emitter face is <NUM> to <NUM> radially outward from the first interior reflective surface relative to the first central axis. Additionally or alternatively, a second light source is coupled to the second waveguide about the second optical outlet, where the second light source defines a second source emitter face that is radially outward from the second interior reflective surface relative to the second central axis.

Additionally or alternatively, the imaging device has a first reflector plane coupled to the housing. The first reflector plane is <NUM>° to <NUM>° from the object plane, where the first reflector plane is in reflective communication with the object plane. A second reflector plane is coupled to the housing. The second reflector plane is <NUM> to <NUM>° from the object plane. The second reflector plane is in reflective communication with the object plane. Additionally or alternatively, each of the first reflector plane and the second reflector plane have a distal end relative to the object plane, and the distal end of the first reflector plane is <NUM> to <NUM> from the distal end of the second reflector plane. Additionally or alternatively, a distance between a distal end of the first reflector plane and the object plane is <NUM> to <NUM>. Additionally or alternatively, the first reflector plane and second reflector plane each have a gloss of <NUM>-<NUM> at a <NUM>° angle, in accordance with ASTM D <NUM>-<NUM>.

Additionally or alternatively, an image capture device coupled to the housing, the image capture device having an optical lens, wherein a distance between the optical lens and the object plane is <NUM> to <NUM>. Additionally or alternatively, a back illumination device is coupled to the housing, where the back illumination device has a back emitter face opposite the object plane relative to the support plate. The back emitter face is <NUM> to <NUM> from the object plane, and the back emitter face is configured to transmit diffuse light through the object plane.

Some embodiments of the current technology relate to an imaging device having a support plate defining an object plane. A housing surrounds the object plane across the support plate. A first waveguide is coupled to the housing, where the first waveguide has a first interior reflective surface. The first waveguide defines a first optical inlet through the first interior reflective surface and a first optical outlet through the first interior reflective surface. A first light source is coupled to the first waveguide about the first optical inlet. The first light source defines a first source emitter face that is radially outward from the first interior reflective surface relative to the first central axis.

In some such embodiments, the first source emitter face is parallel to the first optical inlet. Additionally or alternatively, the first source emitter face is <NUM> to <NUM> radially outward from the first interior reflective surface relative to the first central axis. Additionally or alternatively, a second waveguide is coupled to the housing. The second waveguide has a second interior reflective surface. The second waveguide defines a second optical inlet through the second interior reflective surface and a second optical outlet through the second interior reflective surface. A second light source is coupled to the second waveguide about the second optical outlet. The second light source defines a second source emitter face that is radially outward from the second interior reflective surface relative to the second central axis. Additionally or alternatively, the second source emitter face is <NUM> to <NUM> radially outward from the second interior reflective surface relative to the second central axis.

Additionally or alternatively, the first optical outlet is <NUM>° to <NUM>° from the object plane. Additionally or alternatively, the second optical outlet is <NUM>° to <NUM>° from the object plane. Additionally or alternatively, the first waveguide defines a first central axis that is <NUM> to <NUM> from a second central axis defined by the second waveguide. Additionally or alternatively, a distance between the object plane and a central axis defined by the first waveguide is <NUM> to <NUM>. Additionally or alternatively, a first reflector plane is coupled to the housing, where the first reflector plane is <NUM>° to <NUM>° from the object plane. The first reflector plane is in reflective communication with the object plane. A second reflector plane is coupled to the housing, where the second reflector plane is <NUM>° to <NUM>° from the object plane. The second reflector plane is in reflective communication with the object plane.

Additionally or alternatively, each of the first reflector plane and the second reflector plane have a distal end relative to the object plane, and the distal end of the first reflector plane is <NUM> to <NUM> from the distal end of the second reflector plane. Additionally or alternatively, a distance between a distal end of the first reflector plane and the object plane is <NUM> to <NUM>. Additionally or alternatively, the first reflector plane and second reflector plane each have a gloss of <NUM>-<NUM> at a <NUM>° angle, in accordance with ASTM D <NUM>-<NUM>. Additionally or alternatively, an image capture device is coupled to the housing, the image capture device having an optical lens, where a distance between the optical lens and the object plane is <NUM> to <NUM>. Additionally or alternatively, a back illumination device is coupled to the housing. The back illumination device has a back emitter face opposite the object plane relative to the support plate, where the back emitter face is <NUM> to <NUM> from the object plane, and the back emitter face is configured to transmit diffuse light through the object plane.

The present technology may be more completely understood and appreciated in consideration of the following detailed description of various embodiments in connection with the accompanying drawings.

The figures are rendered primarily for clarity and, as a result, are not necessarily drawn to scale. Moreover, various structure/components, including but not limited to fasteners, electrical components (wiring, cables, etc.), and the like, may be shown diagrammatically or removed from some or all of the views to better illustrate aspects of the depicted embodiments, or where inclusion of such structure/components is not necessary to an understanding of the various exemplary embodiments described herein.

The technology disclosed herein generally relates to an imaging device that has illumination components. The illumination components are configured to illuminate an object plane of the imaging device for improved optical clarity.

<FIG> depicts a schematic cross-sectional view of an example imaging device, consistent with various embodiments. The imaging device <NUM> is generally configured to receive and scan an object. The imaging device <NUM> has a support plate <NUM> that is configured to receive an object for imaging by the imaging device <NUM>.

The imaging device <NUM> has a housing <NUM> that defines a cavity <NUM>. The support plate <NUM> is disposed in the cavity <NUM> of the housing <NUM>. The surface of the support plate <NUM> that receives the object for imaging defines an object plane <NUM> that is configured to be scanned by the imaging device <NUM>. The housing <NUM> generally surrounds the object plane <NUM> across the support plate <NUM>. The housing <NUM> can be configured to isolate the object plane <NUM> of the support plate <NUM> from ambient light. The housing <NUM> can be configured to isolate the support plate <NUM> from the ambient environment.

The imaging device <NUM> has an image capture device <NUM> that is configured to capture an image of the object plane <NUM> of the support plate <NUM>. The image capture device <NUM> is positioned in the cavity of the housing <NUM>. In various embodiments, the image capture device <NUM> is positioned vertically above the object plane <NUM> of the support plate <NUM>. The image capture device <NUM> can be coupled to the housing <NUM>. The image capture device <NUM> can be a camera, in various embodiments. The image capture device <NUM> can be a line or area scanner. The image capture device <NUM> can have an optical lens <NUM> that is positioned over the support plate <NUM>. The optical lens <NUM> is generally configured to be in optical communication with the object plane <NUM> across the support plate <NUM>.

The object plane <NUM> of the support plate <NUM> is generally positioned to be the focal point of the optical lens <NUM>. The distance dL between the optical lens and the object plane <NUM> of the support plate <NUM> may be critical in some implementations to balance the image resolution of the image capture device <NUM>, the size of the area of the support plate <NUM> that will be imaged, and the field of view of the optical lens, as examples. The distance dL between the optical lens and the object plane is generally at least <NUM>. The distance dL between the optical lens and the object plane is generally no more than <NUM>. In some embodiments, the distance dL between the optical lens and the object plane is <NUM> to <NUM>. In some embodiments, the distance dL between the optical lens and the object plane is <NUM> to <NUM>. The distance dL can generally be determined in a direction perpendicular to the object plane <NUM>.

In various embodiments, the imaging device <NUM> has one or more light sources that are configured to illuminate the object plane <NUM> of the support plate <NUM> for imaging by the image capture device <NUM>. In the current example, one such light source is a back illumination device <NUM>. The back illumination device <NUM> is generally coupled to the housing <NUM>. The back illumination device <NUM> has a back emitter face <NUM> that is generally configured to emit light. The back emitter face <NUM> is opposite the object plane <NUM> relative to the support plate <NUM>. The object plane <NUM> is positioned between the back emitter face <NUM> and the optical lens <NUM> such that light is emitted from the back emitter face <NUM> through the object plane <NUM> towards the optical lens <NUM>.

In various embodiments the back emitter face <NUM> is configured to transmit diffuse light through the object plane <NUM>. The material forming the back emitter face <NUM> can be transparent or translucent. The back emitter face <NUM> can be constructed of glass, plastic, crystal, or other materials. The back emitter face <NUM> can be a translucent material, such as frosted glass. The back emitter face <NUM> can be parallel to the support plate <NUM>, in some embodiments. In some embodiments, the back emitter face <NUM> abuts the support plate <NUM>, where "abuts" is intended to mean that the back emitter face <NUM> and the support plate <NUM> are touching. In some embodiments, the back emitter face <NUM> and the support plate <NUM> are adjacent, with a spacing region defined between them.

In some implementations, the distance between the back emitter face <NUM> and the object plane <NUM> may be critical to even illumination of the object plane <NUM> across the support plate <NUM>. The distance between the back emitter face <NUM> and the object plane <NUM> may be large enough to contribute to diffusion of light emitted by the back emitter face <NUM>, but small enough such that the light emitted by the back emitter face <NUM> illuminates the object plane <NUM> across the support plate <NUM> evenly. In some embodiments the back emitter face <NUM> is at least <NUM> from the object plane <NUM>. In some embodiments the back emitter face <NUM> is no more than <NUM> from the object plane <NUM>. The back emitter face can be <NUM> to <NUM> from the object plane or <NUM> to <NUM> from the object plane.

In the current example, the back illumination device <NUM> has a shell <NUM> defining an illumination cavity <NUM>. The back illumination device <NUM> has a back emitter face <NUM> coupled to the shell <NUM>. The back emitter face <NUM> extends across the illumination cavity <NUM>. One or more light generation devices <NUM> are disposed in the illumination cavity <NUM>. The light generation device <NUM> is configured to emit light in the illumination cavity <NUM>. The light generation device <NUM> can be a variety of different types of devices that generates light. In some embodiments, the light generation device <NUM> can be a single light generation device or an array of multiple light generation devices. Where an array of multiple light generation devices is employed, the light generation devices can be activated individually and/or in combination to provide light. In some embodiments, the light generation device <NUM> has separate light emitting diode (LED) elements that provide red, green, and a blue light. The LED elements can be separately activated to provide a selected color of light. Upon activation of the individual LED elements, light from the light generation device <NUM> emits light through the back emitter face <NUM>.

The light can be reflected off of various inner surfaces of the back illumination device <NUM>. The light can be transmitted through the back emitter face <NUM> towards the support plate <NUM>. In some alternate embodiments, the back emitter face <NUM> of the back illumination device <NUM> can be defined by a light generation device itself, such as a light emitting diode (LED) or other device.

In various embodiments, the support plate <NUM> that is generally configured to transmit light therethrough. The support plate <NUM> is configured to transmit light through the object plane to the optical lens <NUM> of the image capture device <NUM>. The support plate <NUM> is generally transparent and can be constructed of glass, plastic, crystal, and the like. In embodiments, light generated by the back illumination device <NUM> is transmitted through the support plate <NUM>.

The imaging device <NUM> has a first reflector plane <NUM> within the housing <NUM>. The first reflector plane <NUM> is configured to be in reflective communication with the object plane <NUM>. The first reflector plane <NUM> can be configured to reflect light generated by the one or more light sources of the imaging device <NUM> towards the object plane <NUM>. In embodiments incorporating a back illumination device <NUM>, the first reflector plane <NUM> can be configured to reflect light emitted by the back emitter face <NUM> towards the object plane <NUM>. The first reflector plane <NUM> is generally a planar surface defined by an inner surface of the housing <NUM> itself or, alternatively, defined by a separate component that is coupled to the housing <NUM>. In the current example, the first reflector plane <NUM> is defined by a first panel <NUM> that is coupled to an inner surface of the housing <NUM>. In some embodiments the first reflector plane <NUM> is defined by a coating on an inner surface of the housing <NUM> or a coating on the first panel <NUM>.

It has been discovered that the angle α<NUM> between the first reflector plane <NUM> and the object plane <NUM> may be critical to some implementations of the current technology. In particular, the angle α<NUM> between the first reflector plane <NUM> and the object plane <NUM> can dictate the quality of the illumination of the object plane <NUM> across the support plate <NUM>. If the angle α<NUM> between the first reflector plane <NUM> and the object plane <NUM> is too large or too small, the illumination of the object plane <NUM> across the support plate <NUM> may be uneven. If the angle α<NUM> is too large, the first reflector plane <NUM> may reflect less light on a central region of the support plate <NUM> than a region outside the central region, such as a first edge region of the support plate <NUM>. If the angle α<NUM> is too small, the first reflector plane <NUM> may reflect more light on the central region of the support plate <NUM> than the first edge region of the support plate <NUM>.

The first reflector plane <NUM> is generally oblique to the object plane <NUM>. In various embodiments, the first reflector plane <NUM> is at an angle α<NUM> of at least <NUM>° from the object plane <NUM>, where the angle α<NUM> can be in the clockwise or counterclockwise direction. In various embodiments, the first reflector plane <NUM> is at an angle α<NUM> of no more than <NUM>° from the object plane <NUM>. In some embodiments, the first reflector plane <NUM> is at an angle α<NUM> of <NUM>° to <NUM>° from the object plane <NUM>. In some embodiments, the first reflector plane <NUM> is at an angle α<NUM> of <NUM>° to <NUM>° from the object plane <NUM>. The angle α<NUM> of the first reflector plane <NUM> relative to the object plane <NUM> can advantageously improve the uniformity of illumination of the object plane <NUM>. The angle α<NUM> of the first reflector plane <NUM> relative to the object plane <NUM> can advantageously contribute to a reduction in glare off of the support plate <NUM> towards the image capture device <NUM>.

The spacing of the first reflector plane <NUM> and the object plane <NUM> can advantageously improve the illumination of the object plane <NUM> by the first reflector plane <NUM>. The first reflector plane <NUM> generally has a distal end 114a relative to the object plane <NUM>, where "distal end" is intended to mean the end that is furthest from the object plane <NUM>. The distal end 114a of the first reflector plane <NUM> can have a perpendicular distance d<NUM> of at least <NUM> to the object plane <NUM>. The distal end 114a of the first reflector plane <NUM> can have a perpendicular distance d<NUM> of no more than <NUM> to the object plane <NUM>. The distal end 114a of the first reflector plane <NUM> can have a perpendicular distance d<NUM> of <NUM> to <NUM> to the object plane <NUM>. The distal end 114a of the first reflector plane <NUM> can have a perpendicular distance d<NUM> of <NUM> to <NUM> to the object plane <NUM>. The distance d<NUM> may be critical to some implementations to ensure even illumination of the object plane <NUM> across the support plate <NUM>. If the distance d<NUM> is too large, portions of the object plane <NUM>, such as a central region of the support plate <NUM> may not receive enough light. If the distance d<NUM> is too small, portions of the support plate <NUM> may receive too much light.

In various embodiments, the first reflector plane <NUM> is configured to reflect diffuse light within the cavity <NUM>. The first reflector plane <NUM> can have a gloss of <NUM> to <NUM> at a <NUM>° angle, in accordance with ASTM D <NUM>-<NUM> (<NUM>). The first reflector plane <NUM> can have a gloss of <NUM> to <NUM> at a <NUM>° angle, in accordance with ASTM D <NUM>-<NUM> (<NUM>). The first reflector plane <NUM> can have a whiteness of greater than or equal to <NUM> in accordance with ASTM E313-<NUM> (<NUM>). In one example, the first panel <NUM> is coated a plurality of layers of Duxone®, Glossy White, by Axalta Coating Systems headquartered in Philadelphia, Pennsylvania. The first reflector plane <NUM> may be a spray coating.

The imaging device <NUM> has a second reflector plane <NUM> within the housing <NUM>. The second reflector plane <NUM> is configured to be in reflective communication with the object plane <NUM>. The second reflector plane <NUM> can be configured to reflect light generated by the one or more light sources of the imaging device <NUM> towards the object plane <NUM>. In embodiments incorporating a back illumination device <NUM>, the second reflector plane <NUM> can be configured to reflect light emitted by the back emitter face <NUM> towards the object plane <NUM>. The second reflector plane <NUM> is generally a planar surface defined by an inner surface of the housing <NUM> itself or, alternatively, defined by a separate component that is coupled to the housing <NUM>. In the current example, the second reflector plane <NUM> is defined by a second panel <NUM> that is coupled to an inner surface of the housing <NUM>. In some embodiments the second reflector plane <NUM> is defined by a coating on an inner surface of the housing <NUM> or a coating on the second panel <NUM>.

The second reflector plane <NUM> is generally oblique to the object plane. In various embodiments, the second reflector plane <NUM> is at an angle α<NUM> from the object plane <NUM> that is in the opposite direction of the angle α<NUM> of the first reflector plane <NUM> from the object plane <NUM>. Similar to the first reflector plane <NUM>, the angle α<NUM> of the second reflector plane <NUM> relative to the object plane <NUM> may be critical in some implementations. The second reflector plane <NUM> is at an angle α<NUM> of at least <NUM>° from the object plane <NUM>. In various embodiments, the second reflector plane <NUM> is at an angle α<NUM> of no more than <NUM>° from the object plane <NUM>. In some embodiments, the second reflector plane <NUM> is at an angle α<NUM> of <NUM>° to <NUM>° from the object plane <NUM>. In some embodiments, the second reflector plane <NUM> is at an angle α<NUM> of <NUM>° to <NUM>° from the object plane <NUM>. The angle α<NUM> of the second reflector plane <NUM> relative to the object plane <NUM> can advantageously improve the uniformity of illumination of the object plane <NUM>. The angle α<NUM> of the second reflector plane <NUM> relative to the object plane <NUM> can advantageously contribute to a reduction in glare off of the support plate <NUM> towards the image capture device <NUM>.

The spacing of the second reflector plane <NUM> and the object plane <NUM> can advantageously improve the illumination of the object plane <NUM> by the second reflector plane <NUM>. The second reflector plane <NUM> generally has a distal end 116a relative to the object plane <NUM>, where "distal end" is intended to mean the end that is furthest from the object plane <NUM>. The distal end 116a of the second reflector plane <NUM> can have a perpendicular distance d<NUM> of at least <NUM> to the object plane <NUM>. The distal end 116a of the second reflector plane <NUM> can have a perpendicular distance d<NUM> of no more than <NUM> to the object plane <NUM>. The distal end 116a of the second reflector plane <NUM> can have a perpendicular distance d<NUM> of <NUM> to <NUM> to the object plane <NUM>. The distal end 116a of the second reflector plane <NUM> can have a perpendicular distance d<NUM> of <NUM> to <NUM> to the object plane <NUM>. The distance d<NUM> between the distal end 116a of the second reflector plane <NUM> and the object plane <NUM> may be critical for the same reasons discussed above with respect to the perpendicular distance d<NUM> of the distal end 114a of the first reflector plane <NUM> to the object plane <NUM>.

In various embodiments, the second reflector plane <NUM> is configured to reflect diffuse light within the cavity <NUM>. The second reflector plane <NUM> can have a gloss of <NUM> to <NUM> at a <NUM>° angle, in accordance with ASTM D <NUM>-<NUM> (<NUM>). The second reflector plane <NUM> can have a gloss of <NUM> to <NUM> at a <NUM>° angle, in accordance with ASTM D <NUM>-<NUM> (<NUM>). The second reflector plane <NUM> can have a whiteness of greater than or equal to <NUM> in accordance with ASTM E313-<NUM>. In one example, the second panel <NUM> is coated a plurality of layers of Duxone®, Glossy White, by Axalta Coating Systems headquartered in Philadelphia, Pennsylvania. The second reflector plane <NUM> may be a spray coating.

In some embodiments the first reflector plane <NUM> and the second reflector plane <NUM> are symmetric relative to the support plate <NUM>. Such a configuration may advantageously provide even illumination of the object plane <NUM>. The distance between the first reflector plane <NUM> and the second reflector plane <NUM> may be critical in some implementations. If the first reflector plane <NUM> and the second reflector plane <NUM> are too far apart or too close, the illumination of the object plane <NUM> across the support plate <NUM> may be uneven. If the first reflector plane <NUM> and the second reflector plane <NUM> are too far apart, a central region of the support plate <NUM> may have less illumination than regions outside the central region. If the first reflector plane <NUM> and the second reflector plane <NUM> are too close, then the central region of the support plate <NUM> may be relatively bright from receiving reflected light from both reflector planes <NUM>, <NUM> compared to outer regions of the support plate <NUM>.

The distance between the first reflector plane <NUM> and the second reflector plane <NUM> may be characterized by the distance between their distal ends. In some embodiments, the distal end 114a of the first reflector plane <NUM> is at least <NUM> from the distal end 116a of the second reflector plane <NUM>. In some embodiments, the distal end 114a of the first reflector plane <NUM> is no more than <NUM> from the distal end 116a of the second reflector plane <NUM>. The distal end 114a of the first reflector plane <NUM> can be <NUM> to <NUM> from the distal end 116a of the second reflector plane <NUM>. In some preferred examples, the distal end 114a of the first reflector plane <NUM> can be <NUM> to <NUM> from the distal end 116a of the second reflector plane <NUM>.

In various embodiments, the cavity <NUM> of the housing <NUM> can be separated into an object receptacle <NUM>(a) and an imaging cavity <NUM>(b) by a barrier <NUM>. The imaging cavity <NUM>(b) can be configured to contain various imaging and processing components such as the image capture device <NUM> and the reflector planes <NUM>, <NUM>. In various embodiments the barrier <NUM> is generally transparent to facilitate imaging operations there-through. The barrier <NUM> can be mounted to the housing <NUM>. The housing <NUM> and the barrier <NUM> are generally configured to isolate the imaging cavity <NUM>(b) from the ambient environment. The barrier <NUM> and the housing <NUM> can isolate the contained imaging, illumination, and processing components to limit interference with those components during maintenance operations. The barrier <NUM> and the housing <NUM> can isolate the contained imaging, illumination, and processing components to limit interference with those components during insertion and removal objects for imaging in the object receptacle <NUM>(a).

<FIG> depicts a schematic cross-sectional view of another example imaging device <NUM>, consistent with various embodiments. The imaging device <NUM> is generally configured to receive and scan an object. The imaging device <NUM> has a support plate <NUM> that is configured to receive an object for imaging by the imaging device <NUM>. The support plate <NUM> can be consistent with the description of the support plate above with respect to <FIG>.

The imaging device <NUM> has a housing <NUM> that defines a cavity <NUM>. The support plate <NUM> is disposed in the cavity <NUM> of the housing <NUM>. The surface of the support plate <NUM> that receives the object for imaging defines an object plane <NUM> that is configured to be scanned by the imaging device <NUM>. The housing <NUM> generally surrounds the object plane <NUM> across the support plate <NUM>. The housing <NUM> can be configured to isolate the object plane <NUM> of the support plate <NUM> from ambient light. The housing <NUM> can be configured to isolate the support plate <NUM> from the ambient environment. The support plate <NUM> can be isolated from the ambient environment to prevent dust and other debris from settling on the support plate <NUM>.

In the current example, the object plane <NUM> is defined in a spacing region between the support plate <NUM> and a plate clamp <NUM>. The plate clamp <NUM> is a frame that extends around a portion of the support plate <NUM>. The plate clamp <NUM> is generally configured to secure a perimeter region of an object on the support plate <NUM>. In various embodiments the plate clamp <NUM> defines a central opening that is configured to expose a central region of the object on the support plate <NUM> for imaging operations on the central region of the object. In some embodiments, the spacing region between the support plate <NUM> and the plate clamp <NUM> has a height that is configured to accommodate the thickness of a biological growth plate. In some embodiments, a transparent protector plate can be coupled to the plate clamp <NUM> and extend across the central opening of the plate clamp <NUM>.

The imaging device <NUM> has an image capture device <NUM> that is configured to capture an image of the object plane <NUM> of the support plate <NUM>. The image capture device <NUM> is positioned in the cavity of the housing <NUM>. In various embodiments, the image capture device <NUM> is positioned vertically above the object plane <NUM> of the support plate <NUM>. The image capture device <NUM> can be coupled to the housing <NUM>. The image capture device <NUM> can be a camera, in various embodiments. The image capture device <NUM> can be a line or area scanner. The image capture device <NUM> can have an optical lens <NUM> that is positioned over the support plate <NUM>. The optical lens <NUM> is generally configured to be in optical communication with the object plane <NUM> across the support plate <NUM>. The object plane <NUM> of the support plate <NUM> is generally positioned to be the focal point of the optical lens <NUM>. The distance between the optical lens and the object plane can be consistent with the description above associated with <FIG>.

In various embodiments, the imaging device <NUM> has one or more light sources that are configured to illuminate the object plane <NUM> of the support plate <NUM> for imaging by the image capture device <NUM>. In the current example, one such light source is a back illumination device <NUM>. The back illumination device <NUM> is generally coupled to the housing <NUM>. The back illumination device <NUM> has a back emitter face <NUM> that is generally configured to emit light. The back emitter face <NUM> is opposite the object plane <NUM> relative to the support plate <NUM>. The object plane <NUM> is positioned between the back emitter face <NUM> and the optical lens <NUM> such that light is emitted from the back emitter face <NUM> through the object plane <NUM> towards the optical lens <NUM>. The back emitter face <NUM> can have configurations consistent with the discussion above with respect to <FIG>. The back emitter face <NUM> can be constructed of materials discussed above with respect to <FIG>.

In examples, the back illumination device <NUM> has a shell <NUM> defining an illumination cavity <NUM>. The back emitter face <NUM> is coupled to the shell <NUM>. The back emitter face <NUM> extends across the illumination cavity <NUM>. One or more light generation devices 238a, 238b are disposed in the illumination cavity <NUM> and, particularly, a first light generation device 238a and a second light generation device 238b. Each light generation device 238a, 238b is configured to emit light in the illumination cavity <NUM>. In various embodiments, each light generation device 238a, 238b can be consistent with the types of light generation devices described above with respect to <FIG>. In various embodiments, the light generation devices 238a, 238b are positioned in the illumination cavity <NUM> to avoid direct illumination of the back emitter face <NUM>. In particular, the light generation devices 238a, 238b are configured such that the light reflects off at least one inner surface <NUM> of the back illumination device <NUM> before illuminating the back emitter face <NUM>. The light can be transmitted through the back emitter face <NUM> towards the support plate <NUM>.

In the current example, the imaging device <NUM> has additional light sources that are configured to illuminate the object plane <NUM> of the support plate <NUM> for imaging by the image capture device <NUM>. In particular, the imaging device <NUM> has a waveguide <NUM> coupled to the housing <NUM>. The waveguide <NUM> is generally configured to emit diffuse light towards the support plate <NUM>. In some embodiments, the waveguide <NUM> is configured to generate light and diffuse the generated light. The waveguide <NUM> is generally configured to advantageously avoid the creation of glare on the support plate <NUM>. The configuration of the waveguide <NUM> may advantageously maximize the strength of the diffuse light on the support plate <NUM> while limiting glare. In various embodiments the waveguide <NUM> is a first waveguide <NUM> and the imaging device <NUM> can have a second waveguide <NUM> and, potentially, additional waveguides.

<FIG> depicts a perspective view of an example waveguide consistent with <FIG>, and <FIG> is a perspective sectional view of a portion of a waveguide consistent with <FIG>. <FIG> is a cross-sectional view of the example waveguide of <FIG>. <FIG> can be viewed in conjunction with <FIG> for clarity. While the discussion of <FIG> is explained in terms of the first waveguide <NUM>, the discussion also applies to the second waveguide <NUM> unless noted herein or otherwise inconsistent with the current disclosure.

The first waveguide <NUM> has a first interior reflective surface <NUM>. The first interior reflective surface <NUM> is symmetrical about a first central axis la. The first interior reflective surface <NUM> can extend in a longitudinal direction defined by the first central axis la. In the current example, the first interior reflective surface <NUM> has an inner cylindrical configuration about the first central axis la extending in a longitudinal direction. As such, the first interior reflective surface <NUM> defines a circle in a cross-section perpendicular to the central axis la. In some embodiments, the first interior reflective surface has a cross-section perpendicular to the central axis defining an alternate shape, such as an oval, an octagon, or another geometric shape. In some embodiments, the first interior reflective surface can have an inner ovular cylindrical configuration. The first interior reflective surface <NUM> has a length L (<FIG>) extending in the longitudinal direction and a radius r<NUM> (<FIG>) about the first central axis la.

The first waveguide <NUM> defines a first optical inlet <NUM> and a first optical outlet <NUM>, each through the first interior reflective surface <NUM>. The first waveguide <NUM> is configured to receive light through the first optical inlet <NUM>. The first optical inlet <NUM> has a length extending in the longitudinal direction (<FIG>). The first optical inlet <NUM> has a width Wi perpendicular to its length. The width Wi is equal to the length of the chord across the opening in the first interior reflective surface <NUM> defining the first optical inlet <NUM>. In various embodiments, the width Wi remains constant along the length of the first optical inlet <NUM>. In the current example, the first optical inlet <NUM> has two inlet segments, <NUM>-<NUM> and <NUM>-<NUM> (<FIG>). The two inlet segments <NUM>-<NUM>, <NUM>-<NUM> are radially aligned relative to the first central axis la. In some alternate examples, the first optical inlet <NUM> can be a single opening. In some examples, the first optical inlet <NUM> can be more than two openings.

The first waveguide <NUM> is configured to emit light through the first optical outlet <NUM>. The first optical outlet <NUM> has a length extending in the longitudinal direction. The first optical outlet <NUM> has a width W<NUM> perpendicular to its length. The width W<NUM> is equal to the length of the chord across the opening in the first interior reflective surface <NUM> defining the first optical outlet <NUM>. In various embodiments, the width W<NUM> remains constant along the length of the first optical outlet <NUM>. In the current example, the first optical outlet <NUM> has two outlet segments, <NUM>-<NUM> and <NUM>-<NUM> (<FIG>). The two outlet segments <NUM>-<NUM>, <NUM>-<NUM> are radially aligned relative to the first central axis la. In some alternate examples, the first optical outlet <NUM> can be a single opening. In some examples, the first optical outlet <NUM> can be more than two openings.

The first optical inlet <NUM> is radially spaced from the first optical outlet <NUM> relative to the first central axis la. The first optical inlet <NUM> is radially spaced from the first optical outlet <NUM> relative to the first central axis la by a first angle β<NUM> (<FIG> and <FIG>). The angle of the first optical inlet <NUM> is determined based on the midpoint of the width Wi of the first optical inlet <NUM> (see <FIG>). The angle of the first optical outlet <NUM> is determined based on the midpoint of the width W<NUM> of the first optical outlet <NUM> (see <FIG>). The first optical inlet <NUM> and the first optical outlet <NUM> are generally radially spaced such that light emitted through the first optical inlet <NUM> generally reflects off of the first interior reflective surface <NUM> one or more times before being emitted through the first optical outlet <NUM>. In various embodiments, the first angle β<NUM> defined between the first optical inlet <NUM> and the first optical outlet <NUM> is an acute angle. In some embodiments, the first angle β<NUM> defined between first optical inlet <NUM> and the first optical outlet <NUM> is less than <NUM> degrees.

A first outlet angle c<NUM> between the first optical outlet <NUM> and the object plane <NUM> (<FIG>) may advantageously increase the uniformity of the illumination of at least a portion of the object plane <NUM> across the support plate <NUM>. It has been discovered that the first outlet angle c<NUM> between the first optical outlet <NUM> and the object plane <NUM> may be critical to some implementations of the current technology. In particular, the first outlet angle c<NUM> between the first optical outlet <NUM> and the object plane <NUM> can dictate the quality of the illumination of the object plane <NUM> across the support plate <NUM>. If the first outlet angle c<NUM> between the first optical outlet <NUM> and the object plane <NUM> is too large or too small, the illumination of the object plane <NUM> across the support plate <NUM> may be uneven or the quality of light may be undesirable. If the first outlet angle c<NUM> is too small, the first optical outlet <NUM> may reflect less light on a central region of the support plate <NUM> than a region outside the central region, such as a first edge region of the support plate <NUM>. If the first outlet angle c<NUM> is too large, the first optical outlet <NUM> may reflect more light on the central region of the support plate <NUM> than the first edge region of the support plate <NUM>. Additionally, if the first outlet angle c<NUM> is too large, the intensity of the light on the support plate <NUM> may be too severe and may create shadows and highlight imperfections of the object in the object plane <NUM>, which may negatively impact the ability of the system to conduct imaging operations.

In various embodiments, the first optical outlet <NUM> is at an angle c<NUM> of at least <NUM>° from the object plane <NUM>, either in a clockwise or counterclockwise direction. In various embodiments, the first optical outlet <NUM> is at an angle c<NUM> of no more than <NUM>° from the object plane <NUM>. In some embodiments, the first optical outlet <NUM> is at an angle c<NUM> of <NUM>° to <NUM>° from the object plane <NUM>. In some embodiments, the first optical outlet <NUM> is at an angle c<NUM> of <NUM>° to <NUM>° from the object plane <NUM>.

In various embodiments, the distance dw1 (<FIG>) between the first waveguide <NUM> and the object plane <NUM> may advantageously increase the uniformity of the illumination of at least a portion of the object plane <NUM> across the support plate <NUM>. The distance dw1 may be critical to some implementations to ensure even illumination of the object plane <NUM> across the support plate <NUM>. If the distance dw1 is too large, portions of the object plane <NUM>, such as a central region of the support plate <NUM> may not receive enough light. If the distance dw1 is too small, portions of the support plate <NUM> may receive too much light. The distance dw1 between the first waveguide <NUM> and the object plane <NUM> can generally be determined from the first central axis la of the first waveguide <NUM> in a direction perpendicular to the object plane <NUM>. In various embodiments, the distance dw1 between the first central axis la of the first waveguide <NUM> and the object plane <NUM> is at least <NUM>. In various embodiments, the distance dw1 between the first central axis la of the first waveguide <NUM> and the object plane <NUM> is no more than <NUM>. In some embodiments, the distance dw1 between the first central axis la of the first waveguide <NUM> and the object plane <NUM> is <NUM> to <NUM>. In some embodiments, the distance dw1 between the first central axis la of the first waveguide <NUM> and the object plane <NUM> is <NUM> to <NUM>.

The first interior reflective surface <NUM> is generally configured to reflect light therein. The first interior reflective surface <NUM> is generally a radial surface about the first central axis la having a length Lw1 (<FIG>). The first interior reflective surface <NUM> can have an end surface <NUM>-<NUM> extending across each end of the radial surface. In various embodiments, the length Lw1 of the first interior reflective surface <NUM> is at least <NUM>. In various embodiments, the length Lw1 of the first interior reflective surface <NUM> is no more than <NUM>. In some embodiments, the length Lw1 of the first interior reflective surface <NUM> is at least <NUM>.

The first interior reflective surface <NUM> can be configured to diffuse, or scatter, light received through the first optical inlet <NUM>. Such a configuration may advantageously optimize the uniformity of the light emitted through the first optical outlet <NUM>. In some embodiments, the first interior reflective surface <NUM> is defined by a coating on the inner surface of the first waveguide <NUM>. The coating can generally be configured to minimize glare. The first interior reflective surface <NUM> has a gloss of at least <NUM>, where gloss is determined at a <NUM>° angle in accordance with ASTM D <NUM>-<NUM>. In various embodiments, the first interior reflective surface <NUM> has a gloss of no more than <NUM> at a <NUM>° angle. In various embodiments, the first interior reflective surface <NUM> has a gloss of <NUM> to <NUM>. The first interior reflective surface <NUM> can have a whiteness of greater than or equal to <NUM> in accordance with ASTM E313-<NUM>.

In examples, the first interior reflective surface <NUM> is coated with a low gloss urethane enamel and catalyst that is sprayed on the first interior reflective surface <NUM>. As a specific example, three parts of #AUE-100LG of PPG Industries of Southfield, Michigan, is mixed with catalyst #AUE-<NUM> (also by PPG Industries) and paint thinner. The mixture is spray-coated onto the first interior reflective surface <NUM> in <NUM> to <NUM> layers. Each layer has a cure time ranging from <NUM> to <NUM> minutes between applications. The coating has a total thickness ranging from <NUM> to <NUM>.

Returning to the discussion of <FIG>, a first light source <NUM> is coupled to the first waveguide <NUM>. The first light source <NUM> is generally configured to emit light through the first optical inlet <NUM> of the first waveguide <NUM>. The first light source <NUM> is coupled to the first waveguide <NUM> about the first optical inlet <NUM>. The first light source <NUM> can be consistent with the types of light generation devices described above with respect to <FIG>. The first light source <NUM> defines a first source emitter face <NUM>. The first source emitter face <NUM> is the face of the first light source <NUM> from which light is emitted. In various embodiments, the first source emitter face <NUM> is parallel to the first optical inlet <NUM>, meaning that the plane defined by the length and the width Wi of the first optical inlet <NUM> is parallel to the plane defined by the first source emitter face <NUM>.

In various embodiments, the position of the first source emitter face <NUM> relative to the first interior reflective surface <NUM> may advantageously reduce shadows and glare to optimize uniformity of the light emitted from the first optical outlet <NUM>. The first source emitter face <NUM> is generally radially outward from the first interior reflective surface <NUM> relative to the first central axis la (<FIG>). A distance rd between the first source emitter face <NUM> and the first interior reflective surface <NUM> may be critical in some implementations to achieve desirable illumination of the support plate <NUM> across the object plane <NUM> for imaging. If the distance rd is too small, the intensity of the light on the support plate <NUM> may be too high, resulting in the creation of shadows and highlighting imperfections of the object in the object plane <NUM>, which may negatively impact the ability of the system to conduct imaging operations. If the distance rd is too high, the support plate <NUM> might not be effectively illuminated to conduct imaging operations.

In various embodiments, the first source emitter face <NUM> is radially outward from the first interior reflective surface <NUM> by distance rd of at least <NUM>. In various embodiments, the first source emitter face <NUM> is radially outward from the first interior reflective surface <NUM> by a radial distance rd of no more than <NUM>. The first source emitter face <NUM> can be radially outward from the first interior reflective surface <NUM> by a radial distance rd of <NUM> to <NUM>. In some examples, the first source emitter face <NUM> is radially outward from the first interior reflective surface <NUM> by a radial distance rd of <NUM> to <NUM>.

While the discussion of <FIG> is explained in terms of the first waveguide <NUM>, the discussion also applies to the second waveguide <NUM>. The second waveguide <NUM> has a second interior reflective surface <NUM>. The second interior reflective surface <NUM> is symmetrical about a second central axis lb. The second interior reflective surface <NUM> can extend in a longitudinal direction defined by the second central axis lb. In the current example, the second interior reflective surface <NUM> has an inner cylindrical configuration about the second central axis lb extending in a longitudinal direction. As such, the second interior reflective surface <NUM> defines a circle in a cross-section perpendicular to the central axis lb. In some embodiments, the second interior reflective surface has a cross-section perpendicular to the central axis defining an alternate shape, such as an oval, an octagon, or another geometric shape. In some embodiments, the second interior reflective surface can have an inner ovular cylindrical configuration. The second interior reflective surface <NUM> has a length extending in the longitudinal direction and a radius r<NUM> (<FIG>) about the second central axis lb.

The second waveguide <NUM> defines a second optical inlet <NUM> and a second optical outlet <NUM>, each through the second interior reflective surface <NUM>. The second waveguide <NUM> is configured to receive light through the second optical inlet <NUM>. The second optical inlet <NUM> has a length extending in the longitudinal direction (as discussed in reference to <FIG> for the first waveguide <NUM>). The second optical inlet <NUM> has a width perpendicular to its length. Similar to the first optical inlet <NUM>, the width is equal to the length of the chord across the opening in the second interior reflective surface <NUM> defining the second optical inlet <NUM>. In various embodiments, the width remains constant along the length of the second optical inlet <NUM>. The second optical inlet <NUM> can have two inlet segments. The two inlet segments can be radially aligned relative to the second central axis lb. In some alternate examples, the second optical inlet <NUM> can be a single opening. In some examples, the second optical inlet <NUM> can be more than two openings.

The second waveguide <NUM> is configured to emit light through the second optical outlet <NUM>. The second optical outlet <NUM> has a length extending in the longitudinal direction. The second optical outlet <NUM> has a width perpendicular to its length. The width is equal to the length of the chord across the opening in the second interior reflective surface <NUM> defining the second optical outlet <NUM>. In various embodiments, the width remains constant along the length of the second optical outlet <NUM>. In some examples, the second optical outlet <NUM> has two outlet segments. The two outlet segments can be radially aligned relative to the second central axis lb. In some examples, the second optical outlet <NUM> can be a single opening. In some examples, the second optical outlet <NUM> can be more than two openings.

The second optical inlet <NUM> is radially spaced from the second optical outlet <NUM> relative to the second central axis lb. The second optical inlet <NUM> is radially spaced from the second optical outlet <NUM> relative to the second central axis lb by a second angle β<NUM> (<FIG>). The angle of the second optical inlet <NUM> is determined based on the midpoint of the width of the second optical inlet <NUM>, similar to the angle of the first optical inlet <NUM>, discussed above. The angle of the second optical outlet <NUM> is determined based on the midpoint of the width of the second optical outlet <NUM>. The second optical inlet <NUM> and the second optical outlet <NUM> are generally radially spaced such that light emitted through the second optical inlet <NUM> generally reflects off of the second interior reflective surface <NUM> one or more times before being emitted through the second optical outlet <NUM>. In various embodiments, the second angle β<NUM> defined between the second optical inlet <NUM> and the second optical outlet <NUM> is an acute angle. In some embodiments, the second angle β<NUM> defined between second optical inlet <NUM> and the second optical outlet <NUM> is less than <NUM> degrees.

A second outlet angle c<NUM> of the second optical outlet <NUM> relative to the object plane <NUM> may be critical in some implementations for the same reasons described above relative to the first outlet angle c<NUM> of the first optical outlet <NUM> relative to the object plane <NUM>. A second outlet angle c<NUM> between the second optical outlet <NUM> and the object plane <NUM> (<FIG>) may advantageously increase the uniformity of the illumination of at least a portion of the object plane <NUM> across the support plate <NUM>. In some embodiments, the angle c<NUM> between the second optical outlet <NUM> and the object plane <NUM> is the opposite of the angle c<NUM> between the first optical outlet <NUM> and the object plane <NUM>. In various embodiments, the second optical outlet <NUM> is at an angle c<NUM> of at least <NUM>° from the object plane <NUM>. In various embodiments, the second optical outlet <NUM> is at an angle c<NUM> of no more than <NUM>° from the object plane <NUM>. In some embodiments, the second optical outlet <NUM> is at an angle c<NUM> of <NUM>° to <NUM>° from the object plane <NUM>. In some embodiments, the second optical outlet <NUM> is at an angle c<NUM> of <NUM>° to <NUM>° from the object plane <NUM>. The angle c<NUM> can be in a clockwise or counterclockwise direction.

In various embodiments, the distance dw2 between the second waveguide <NUM> and the object plane <NUM> may advantageously increase the uniformity of the illumination of at least a portion of the object plane <NUM> across the support plate <NUM>. In some implementations, the distance dw2 may be critical for the same reasons discussed above with respect to the distance dw1 between the first waveguide <NUM> and the object plane <NUM>. The distance dw2 between the second waveguide <NUM> and the object plane <NUM> can generally be determined from the second central axis lb of the second waveguide <NUM> in a direction perpendicular to the object plane <NUM>. In various embodiments, the distance dw2 between the second central axis lb of the second waveguide <NUM> and the object plane <NUM> is at least <NUM>. In various embodiments, the distance dw2 between the second central axis lb of the second waveguide <NUM> and the object plane <NUM> is no more than <NUM>. In some embodiments, the distance dw2 between the second central axis lb of the second waveguide <NUM> and the object plane <NUM> is <NUM> to <NUM>. In some embodiments, the distance dw2 between the second central axis lb of the second waveguide <NUM> and the object plane <NUM> is <NUM> to <NUM>.

The second interior reflective surface <NUM> is generally configured to reflect light therein. The second interior reflective surface <NUM> is generally a radial surface about the second central axis lb having a length. The second interior reflective surface <NUM> can have an end surface extending across each end of the radial surface. In various embodiments, the length of the second interior reflective surface <NUM> is equal to the length Lw1 of the first interior reflective surface <NUM>.

The second interior reflective surface <NUM> can be configured to diffuse, or scatter, light received through the second optical inlet <NUM>. Such a configuration may advantageously optimize the uniformity of the light emitted through the second optical outlet <NUM>. In some embodiments, the second interior reflective surface <NUM> is defined by a coating on the inner surface of the second waveguide <NUM>. The coating can generally be configured to minimize glare. The second interior reflective surface <NUM> has a gloss of at least <NUM>, where gloss is determined at a <NUM>° angle in accordance with ASTM D <NUM>-<NUM>. In various embodiments, the second interior reflective surface <NUM> has a gloss of no more than <NUM> at a <NUM>° angle. In various embodiments, the second interior reflective surface <NUM> has a gloss of <NUM> to <NUM>. The second interior reflective surface <NUM> can have a whiteness of greater than or equal to <NUM> in accordance with ASTM E313-<NUM>.

In examples, the second interior reflective surface <NUM> is coated with a low gloss urethane enamel and catalyst that is sprayed on the second interior reflective surface <NUM>. As a specific example, three parts of #AUE-100LG of PPG Industries of Southfield, Michigan, is mixed with catalyst #AUE-<NUM> (also by PPG Industries) and paint thinner. The mixture is spray-coated onto the second interior reflective surface <NUM> in <NUM> to <NUM> layers. Each layer has a cure time ranging from <NUM> to <NUM> minutes between applications. The coating has a total thickness ranging from <NUM> to <NUM>.

A second light source <NUM> is coupled to the second waveguide <NUM>. The second light source <NUM> is generally configured to emit light through the second optical inlet <NUM> of the second waveguide <NUM>. The second light source <NUM> is coupled to the second waveguide <NUM> about the second optical inlet <NUM>. The second light source <NUM> can be consistent with the types of light generation devices described above with respect to <FIG>. The second light source <NUM> defines a second source emitter face <NUM>. The second source emitter face <NUM> is the face of the second light source <NUM> from which light is emitted. In various embodiments, the second source emitter face <NUM> is parallel to the second optical inlet <NUM>, meaning that the plane defined by the length and the width of the second optical inlet <NUM> is parallel to the plane defined by the second source emitter face <NUM>.

In various embodiments, the position of the second source emitter face <NUM> relative to the second interior reflective surface <NUM> may advantageously reduce shadows and glare to optimize uniformity of the light emitted from the second optical outlet <NUM>. The second source emitter face <NUM> is generally radially outward from the second interior reflective surface <NUM> relative to the second central axis lb as discussed above with reference to the first waveguide <NUM> with respect to <FIG>. In various embodiments, the second source emitter face <NUM> is radially outward from the second interior reflective surface <NUM> by distance of at least <NUM>. In various embodiments, the second source emitter face <NUM> is radially outward from the second interior reflective surface <NUM> by a radial distance of no more than <NUM>. The second source emitter face <NUM> can be radially outward from the second interior reflective surface <NUM> by a radial distance of <NUM> to <NUM>. In some examples, the second source emitter face <NUM> is radially outward from the second interior reflective surface <NUM> by a radial distance of <NUM> to <NUM>. In some implementations, such a distance may be critical for the same reasons discussed above with respect to the radial distance between first source emitter face <NUM> and the first interior reflective surface <NUM>.

In various embodiments, the first waveguide <NUM> and the second waveguide <NUM> are symmetrical across the support plate <NUM>. Such a configuration may advantageously optimize the uniformity of the light across the support plate <NUM>. The distance s (<FIG>) between the first waveguide <NUM> and the second waveguide <NUM> may be optimized to advantageously increase the uniformity of the light across the support plate <NUM>. The distance between the first waveguide <NUM> and the second waveguide <NUM> may be critical in some implementations. If the first waveguide <NUM> and the second waveguide <NUM> are too far apart or too close, the illumination of the object plane <NUM> across the support plate <NUM> may be uneven. If the first waveguide <NUM> and the second waveguide <NUM> are too far apart, a central region of the support plate <NUM> may have less illumination than regions outside the central region. If the first waveguide <NUM> and the second waveguide <NUM> are too close, then the central region of the support plate <NUM> may be relatively bright from receiving reflected light from both waveguides <NUM>, <NUM> compared to outer regions of the support plate <NUM>.

The distance s between the first waveguide <NUM> and the second waveguide <NUM> may be measured from the first central axis la of the first waveguide <NUM> to the second central axis lb of the second waveguide <NUM>. The distance s between the first waveguide <NUM> and the second waveguide <NUM> is generally at least <NUM>. The distance s between the first waveguide <NUM> and the second waveguide <NUM> is generally no more than <NUM>. In some embodiments, the distance s between the first waveguide <NUM> and the second waveguide <NUM> is <NUM> to <NUM>. In some embodiments, the distance s between the first waveguide <NUM> and the second waveguide <NUM> is <NUM> to <NUM>.

In various implementations of the currently described technology reflectors, such as described above with respect to <FIG>, and waveguides, such as described above with respect to <FIG>, can be used together in an imaging device. <FIG> depicts a simplified cross-sectional perspective view of an example imaging device <NUM> consistent with various implementations, and <FIG> depicts cross-sectional view of the example imaging device <NUM> through a second cross-section. The imaging device <NUM> can be configured to scan images. In an example, the imaging device <NUM> is configured to receive a biological growth plate.

The imaging device <NUM> has a housing <NUM> that defines a cavity <NUM>. A support plate <NUM> is disposed in the cavity <NUM> of the housing <NUM>. A surface of the support plate <NUM> is configured to receives an object for imaging, such as a biological growth plate. The object is configured to be positioned in an object plane <NUM> defined by the support plate <NUM>, which is configured to be scanned by the imaging device <NUM>. The housing <NUM> generally surrounds the object plane <NUM> across the support plate <NUM>. The support plate <NUM> can be isolated from the ambient environment to prevent dust and other debris from settling on the support plate <NUM>, consistent with discussions above.

The imaging device <NUM> has an image capture device <NUM> (<FIG>) that is configured to capture an image of the object plane <NUM> of the support plate <NUM>. The image capture device <NUM> is positioned in the cavity of the housing <NUM>. In various embodiments, the image capture device <NUM> is positioned vertically above the object plane <NUM> of the support plate <NUM>. The image capture device <NUM> can be coupled to the housing <NUM>. The image capture device <NUM> can be a camera, in various embodiments. The image capture device <NUM> can be a line or area scanner. The image capture device <NUM> can have an optical lens (not currently visible) that is positioned over the support plate <NUM>. The optical lens is generally configured to be in optical communication with the object plane <NUM> across the support plate <NUM>. A distance dL can be defined between the optical lens and the object plane <NUM> consistent with the discussion above associated with <FIG>.

The imaging device <NUM> has one or more light sources that are configured to illuminate the object plane <NUM> of the support plate <NUM> for imaging by the image capture device <NUM>. The lights sources are configured to advantageously provide an even, diffuse light on the object plane <NUM> across the support plate <NUM>. A first light source is a back illumination device <NUM>. The back illumination device <NUM> is generally coupled to the housing <NUM>. The back illumination device <NUM> has a back emitter face <NUM> (<FIG>) that is configured to emit light. The back emitter face <NUM> is opposite the object plane <NUM> relative to the support plate <NUM>. The object plane <NUM> is positioned between the back emitter face <NUM> and the optical lens <NUM> such that light is emitted from the back emitter face <NUM> through the object plane <NUM> towards the optical lens <NUM>. The back illumination device <NUM> can be consistent with back illumination devices discussed above with reference to <FIG> and <FIG>.

In the current example, the imaging device <NUM> has additional light sources that are configured to illuminate the object plane <NUM> of the support plate <NUM> for imaging by the image capture device <NUM>. In particular, the imaging device <NUM> has a first waveguide <NUM> and a second waveguide <NUM>. Each of the first waveguide <NUM> and the second waveguide <NUM> are coupled to the housing <NUM>. The waveguides <NUM>, <NUM> are configured to emit diffuse light towards the support plate <NUM>.

The first waveguide <NUM> has a first interior reflective surface <NUM>. The first interior reflective surface <NUM> generally has an inner cylindrical configuration about a first central axis la extending in the longitudinal direction. The first waveguide <NUM> defines a first optical inlet <NUM> and a first optical outlet <NUM>, each through the first interior reflective surface <NUM>. The first optical inlet <NUM> and the first optical outlet <NUM> are generally radially spaced such that light emitted through the first optical inlet <NUM> generally reflects off of the first interior reflective surface <NUM> before being emitted through the first optical outlet <NUM>. The first interior reflective surface <NUM> is generally configured to reflect light therein. A first light source <NUM> is coupled to the first waveguide <NUM> that is configured to emit light through the first optical inlet <NUM>. In particular, the first light source <NUM> is coupled to the first waveguide <NUM> about the first optical inlet <NUM>. The first light source <NUM> defines a first source emitter face, which is not currently visible. The first waveguide <NUM> and the first light source <NUM> have configurations consistent with the discussion above with respect to <FIG>.

The second waveguide <NUM> has a second interior reflective surface <NUM>. The second interior reflective surface <NUM> is symmetrical about a second central axis lb. The second interior reflective surface <NUM> can extend in a longitudinal direction defined by the second central axis lb. The second interior reflective surface <NUM> can have an inner cylindrical configuration about a second central axis lb. However, the second interior reflective surface <NUM> can have define other shapes about a second central axis lb, as discussed above with respect to the first interior reflective surface <NUM>. The second waveguide <NUM> defines a second optical inlet <NUM> and a second optical outlet <NUM>, each through the second interior reflective surface <NUM>. The second optical inlet <NUM> and the second optical outlet <NUM> are generally radially spaced such that light emitted through the second optical inlet <NUM> generally reflects off of the second interior reflective surface <NUM> before being emitted through the second optical outlet <NUM>. The second interior reflective surface <NUM> is generally configured to reflect light therein. A second light source <NUM> is coupled to the second waveguide <NUM> that is configured to emit light through the second optical inlet <NUM>. In particular, the second light source <NUM> is coupled to the second waveguide <NUM> about the second optical inlet <NUM>. The second light source <NUM> defines a second source emitter face, which is not currently visible. The second waveguide <NUM> and the second light source <NUM> have configurations consistent with the discussion above with respect to <FIG>.

The first waveguide <NUM> and the second waveguide <NUM> are generally symmetric relative to the support plate <NUM>. The first waveguide <NUM> and the second waveguide <NUM> can be positioned relative to each other and the support plate <NUM> consistently with the discussions above with respect to <FIG>.

The imaging device <NUM> has a first reflector plane <NUM> and a second reflector plane <NUM> within the housing <NUM>. Each of the first reflector plane <NUM> and the second reflector plane <NUM> is configured to be in reflective communication with the object plane <NUM>. The first reflector plane <NUM> and the second reflector plane <NUM> are configured to reflect light generated by the back illumination device <NUM>, the first waveguide <NUM> and the second waveguide <NUM> towards the object plane <NUM>. The first reflector plane <NUM> and the second reflector plane <NUM> are generally symmetric relative to the support plate <NUM>.

As is visible in <FIG>, the first reflector plane <NUM> has a length LP1 that is parallel to the object plane <NUM> of the support plate <NUM>. In various embodiments, the first reflector length LP1 is greater than a corresponding length LS of the support plate <NUM>, where the "corresponding length" is defined as the dimension parallel to the referenced length. In some implementations, the first reflector length LP1 may be critical to proper illumination of the support plate <NUM> across the object plane <NUM>. If the first reflector length LP1 is too short, then portions of the support plate <NUM> may not be illuminated by the first reflector plane <NUM>, impeding even illumination of the support plate <NUM> for imaging operations. In various embodiments, the first reflector length LP1 is at least <NUM>. In various embodiments, the length of the first reflector is not particularly limited. However, in some embodiments, the first reflector length LP1 is no more than <NUM>. The first reflector length LP1 can be at least <NUM>. In some embodiments, the first reflector length LP1 is <NUM> to <NUM>. While not visible in the current figures, the second reflector plane <NUM> similarly has a second reflector length that may be critical to some implementations of the present technology. The second reflector length is generally consistent with the discussion of the first reflector length LP1, above.

The first reflector plane <NUM> is defined by a first panel <NUM> and the second reflector plane <NUM> is defined by a second panel <NUM>. The first reflector plane <NUM> has a first distal end 314a relative to the support plate <NUM>. The second reflector plane <NUM> has a second distal end 316a relative to the support plate <NUM>. The first reflector plane <NUM> and the second reflector plane <NUM> can have configurations consistent with the discussion above with respect to <FIG>.

Claim 1:
An imaging device (<NUM>; <NUM>) comprising:
a support plate (<NUM>; <NUM>) having a surface that is configured to receive an object for imaging, said surface defining an object plane (<NUM>; <NUM>);
a housing (<NUM>; <NUM>) surrounding the object plane across the support plate;
an image capture device (<NUM>; <NUM>) coupled to the housing, the image capture device having an optical lens (<NUM>, <NUM>) and being positioned vertically above the object plane of the support plate, wherein a distance (dL) between the optical lens and the object plane is <NUM> to <NUM>, the support plate being configured to transmit light through the object plane to the optical lens of the image capture device;
a back illumination device (<NUM>; <NUM>) coupled to the housing, wherein the back illumination device comprises a back emitter face (<NUM>; <NUM>) opposite the object plane relative to the support plate, wherein the back emitter face is <NUM> to <NUM> from the object plane, the object plane being positioned between the back emitter face and the optical lens, and wherein the back emitter face is configured to transmit diffuse light through the object plane;
a first reflector plane (<NUM>; <NUM>) within the housing, the first reflector plane being defined by a first planar surface that is either a first inner surface of the housing or a first panel (<NUM>; <NUM>) that is coupled to an inner surface of the housing, the first planar surface optionally having a coating thereon, wherein the first reflector plane is oblique to the object plane and inclined at an angle (α<NUM>) of <NUM>° to <NUM>° from the object plane; and
a second reflector plane (<NUM>; <NUM>) within the housing, the second reflector plane being defined by a second planar surface that is either a second inner surface of the housing or a second panel (<NUM>) that is coupled to the inner surface of the housing, the second planar surface optionally having a coating thereon, wherein the second reflector plane is oblique to the object plane and inclined at an angle (α<NUM>) of <NUM>° to <NUM>° from the object plane;
wherein the first and second reflector planes are in reflective communication with the object plane and configured to reflect light that is transmitted by the back emitter face through the object plane towards the object plane.