Patent Description:
Microsurgery is a delicate surgery with the help of magnifying equipment. When a surgery is performed under a traditional optical surgery microscope, tissues are magnified, small tissues that are unclear to naked eyes can be seen clearly during the surgery, and have a three-dimensional sense. Therefore, surgeons can dissect, cut and suture various tissues accurately. However, even surgeons quite experienced in suturing blood vessels with naked eyes, without special training, are still not used to microsurgery at the very beginning, and often have uncoordinated hands and eyes, surgical operations under a microscope are thus affected. Therefore, a period of training and adaptation is required to skillfully perform the operations under the surgery microscope.

As the position of an exit pupil of an eyepiece of a surgery microscope is fixed and the diameter of the exit pupil is generally only about <NUM>, in order to observe a complete object plane field of view, an operator is required to keep the pupil of the eye at the position of the exit pupil of the eyepiece for a long time. Therefore, even if the design of the microscope conforms to ergonomics, the operator gets tired easily due to keeping a constant posture for a long time. For certain special affected parts, a surgery microscope needs to be greatly tilted for observation. At this time, the operator still needs to follow the eyepiece to adjust his/her position. Although some surgery microscopes are equipped with compensation structures, the compensation range is mostly limited, and operation and adjustment are required.

Based on the above reasons, in some technical solutions, a display is adopted to display video images, but an ordinary display cannot reflect depth information and is not suitable for real-time operations.

In some other technical solutions, a 3D display based on a principle of polarization is adopted, and an observer needs to wear polarized glasses to see a three-dimensional image, which is not friendly to an operator who wears glasses. Moreover, as a pixel-level microstructure of an FPR optical film is difficult to be further reduced, the size of the display in such solutions is usually large, the distance between the display and the operator is usually more than <NUM> meters, and the observer needs to almost directly face the display to observe an ideal three-dimensional image. When observing objects with a large distance difference, the crystalline lens needs an adjustment process, so when the operator looks away from a display at a long distance to observe and adjust parameters of a microscope or other auxiliary equipment at a short distance, the eye needs to focus again, which adversely affects observation continuity. The loss of optical energy caused by polarization may also reduce subjective brightness of human eyes and easily cause visual fatigue.

<CIT> discloses a dual-path synchronous miniature image display system and method for a surgery microscope. The system comprises a surgery microscope, a processing device, a naked eye 3D display and a projection screen. The processing device comprises two output ends and a processing module. The processing module receives a surgery image, performs space transformation according to three-dimensional vertex coordinates of a primitive to obtain a rendered image, obtains a single depth image according to the rendered image, synthesizes a multi-viewpoint image according to the single depth image, and synchronously outputs the multi-viewpoint image to the naked eye 3D display and the projection screen through two output ends. According to this technical solution, learning and exchange effects of a surgery based on a surgery microscope can be improved, but acquired images need to be subjected to data conversion and processing, so that image delay is greatly increased, and the solution can only be used for learning and exchange but is not suitable for actual microsurgery.

<CIT> discloses a surgery microscope, which comprises an illumination system, an imaging system and an image processing system. Multiple paths of optical imaging subsystems are adopted for simultaneous imaging, different optical imaging systems correspond to different imaging functions, a left eye view and a right eye view with large depths of field and high resolutions are obtained through fusion calculation of images with multiple optical paths and multiple functions, and then the two images are subjected to 3D interlacing. A finally-obtained 3D image of an object has obviously reduced depth sense, effectively improved definition, and the characteristics of large depths of field and high resolutions. At the same time, the microscope has good use comfort, which can well meet application needs of doctors. This solution also requires complex data processing on acquired images, which is difficult to meet low delay requirements of microsurgery. In addition, an eight-optical path imaging system with a complex structure and high manufacturing cost is required.

<NPL>), a surgical stereo microscope with a dual channel optical zoom and a 3D-display.

Therefore, in combination with above technical problems, a new technical solution is essential.

The present invention aims to provide a microsurgery auxiliary device.

The present invention is defined by claim <NUM>.

An observer can directly perform surgical operations by observing a naked eye 3D display. The whole structure of the device is simple, the system delay is small, a fixing mode of the naked eye 3D display can be selected according to field requirements, the fixing structure is simple and reliable, an observation component can be additionally arranged when necessary, and traditional visual observation is realized.

To achieve the aim, according to one aspect, the present invention provides a microsurgery auxiliary device, comprising a lens body and a naked eye 3D display. The lens body is internally provided with an imaging unit; the imaging unit comprises a large objective lens group, a zoom lens group, a first tube objective lens and a photosensitive element; the large objective lens group, the zoom lens group, the first tube objective lens and the photosensitive element are sequentially located in the same observation optical path; the large objective lens group comprises at least one positive lens group and at least one negative lens group, the positive lens group and the negative lens group are arranged in the same optical axis, and the distance between the positive lens group and the negative lens group is adjustable; the naked eye 3D display is connected to the photosensitive element, the distance between the naked eye 3D display and an observer is <NUM>-<NUM>, and the viewing angle range of the naked eye 3D display is not less than <NUM> degrees.

In a further embodiment, the positive lens group comprises at least two optical lenses made of different materials, and the negative lens group comprises at least two optical lenses made of different materials. The negative lens group is close to an object to be observed, and comprises an outer side surface and an inner side surface. Both the outer side surface and the inner side surface are concave surfaces. The absolute value of the radius of curvature of the outer side surface is smaller than the absolute value of the radius of curvature of the inner side surface.

In a further embodiment, the adjustment range of the distance between the positive lens group and the negative lens group is not less than <NUM>.

In a further embodiment, the lens body is further internally provided with at least one illumination unit, the illumination light of each illumination unit can illuminate an object to be observed through the large objective lens group, and the direction of the illumination light entering the large objective lens group is parallel to the direction of the optical axis of the large objective lens group. The illumination unit comprises a light source assembly, a condensing lens group, a diaphragm and a projection lens group which are sequentially positioned in the same illumination optical path. The light source assembly comprises at least one LED light source, and at least one LED light source in the light source assembly can be driven to be switched to the illumination optical path to illuminate the object to be observed.

In a further embodiment, the projection lens group comprises at least one first lens, and the first lens can be driven to move along the optical axis direction thereof. The zoom lens group is of a continuous zoom structure and comprises at least two groups of second lenses, and the second lenses can be driven to move along respective optical axis directions.

In a further embodiment, a transmission device is further included. The projection lens group and the zoom lens group are linked through the transmission device.

In a further embodiment, the device comprises a binocular observation optical path. The microsurgery auxiliary device further comprises an observation unit. The observation unit comprises an eyepiece, a turning lens group and a second tube objective lens. The imaging unit further comprises a spectroscope group. In the same observation optical path, light sequentially passes through the large objective lens group and the zoom lens group to reach the spectroscope group. The spectroscope group splits the light into two parts, one part sequentially passes through the first tube objective lens to reach the photosensitive element, and the other part sequentially passes through the second tube objective lens, the turning lens group and the eyepiece.

In a further embodiment, the device further comprises a support. The support comprises a base, a supporting rod vertically mounted on the base, a large cross arm rotatably mounted on the supporting rod, a small cross arm rotatably mounted on the large cross arm, and a balance arm rotatably mounted on the small cross arm. The lens body and the observation unit are mounted on the balance arm. The naked eye 3D display is mounted on the large cross arm or the supporting rod. Or the microsurgery auxiliary device further comprises a base body and a connecting rod arranged on the base body. The naked eye 3D display is mounted at one end of the connecting rod, and can be placed on the ground or hung on a roof through the base body and the connecting rod.

In a further embodiment, the other end of the connecting rod is movably mounted on the base body, and the connecting rod can be driven to move along the axial direction thereof and/or can be driven to rotate by taking the axis thereof as a rotating shaft.

According to the invention, the size of the naked eye 3D display is between <NUM>-<NUM> inches. The microsurgery auxiliary device further comprises an acquisition device, a processing device and a driving device. The acquisition device can be configured to acquire position information of human eyes of an observer, and the processing device can be configured to control the driving device to act according to the acquired position information of the human eyes so as to adjust the display angle of the naked eye 3D display.

Compared with the prior art, the microsurgery auxiliary device provided by the present invention has one or more beneficial effects as follows:.

In the drawings: <NUM>-lens body, <NUM>-imaging unit, <NUM>-large objective lens group, <NUM>-positive lens group, <NUM>-negative lens group, <NUM>-outer side surface, <NUM>-inner side surface, <NUM>-zoom lens group, <NUM>-second lens, <NUM>-first tube objective lens, <NUM>-photosensitive element, <NUM>-observation optical path, <NUM>-spectroscope group, <NUM>-naked eye 3D display, <NUM>-base body, <NUM>-connecting rod, <NUM>-illumination unit, <NUM>-light source assembly, <NUM>-LED light source, <NUM>-condensing lens group, <NUM>-diaphragm, <NUM>-projection lens group, <NUM>-first lens, <NUM>-illumination optical path, <NUM>-observation unit, <NUM>-eyepiece, <NUM>-turning lens group, <NUM>-second tube objective lens, <NUM>-observer, <NUM>-support, <NUM>-base, <NUM>-supporting rod, <NUM>-large cross arm, <NUM>-small cross arm, <NUM>-balance arm.

In order to further illustrate the technical means and effects adopted by the present invention to achieve intended aims, the specific embodiments, structures, features and effects are described in detail below in combination with the drawings and preferred embodiments.

Refer to <FIG>, <FIG> is a schematic structural diagram of a microsurgery auxiliary device provided by one embodiment of the present invention; <FIG> are principle schematic diagrams of optical paths of a microsurgery auxiliary device provided by one embodiment of the present invention in two states when the distance between a positive lens group and a negative lens group is adjusted; <FIG> is a principle schematic diagram of optical paths of a microsurgery auxiliary device provided by one embodiment of the present invention with an observation unit; <FIG> is a schematic structural diagram of a microsurgery auxiliary device provided by one embodiment of the present invention without an observation unit; <FIG> is a schematic diagram of an application state of a microsurgery auxiliary device provided by one embodiment of the present invention in a dental clinic; <FIG> are principle schematic diagrams of optical paths of a microsurgery auxiliary device provided by one embodiment of the present invention with dual illumination optical paths; <FIG> is a principle schematic diagrams of optical paths of a microsurgery auxiliary device provided by one embodiment of the present invention when a projection lens group and a zoom lens group are linked; <FIG> is a schematic diagram of the viewing angle and the distance of a naked eye 3D display of a microsurgery auxiliary device provided by one embodiment of the present invention; <FIG> are schematic structural diagrams of a microsurgery auxiliary device provided by one embodiment of the present invention when a naked eye 3D display is mounted on a support; <FIG> are mounting schematic diagrams of a microsurgery auxiliary device provided by one embodiment of the present invention when a naked eye 3D display is mounted outside a support.

The present application provides a microsurgery auxiliary device, comprising a lens body <NUM> and a naked eye 3D display <NUM>. The lens body <NUM> is internally provided with an imaging unit <NUM>. The imaging unit <NUM> comprises a large objective lens group <NUM>, a zoom lens group <NUM>, a first tube objective lens <NUM>, and a photosensitive element <NUM>. The large objective lens group <NUM>, the zoom lens group <NUM>, the first tube objective lens <NUM>, and the photosensitive element <NUM> are sequentially located in the same observation optical path <NUM>, as shown in <FIG>.

The large objective lens group <NUM> comprises at least one positive lens group <NUM> and at least one negative lens group <NUM>. The positive lens group <NUM> and the negative lens group <NUM> are arranged in the same optical axis. The distance between the positive lens group <NUM> and the negative lens group <NUM> is adjustable, and the adjustment range of the distance between the positive lens group <NUM> and the negative lens group <NUM> is not less than <NUM>. The large objective lens with a variable focal length can easily change a focal plane position, i.e., the working distance of operation, to cover a required surgical depth. The implementation is to change the distance between the positive lens group <NUM> and the negative lens group <NUM>, the adjustment range of the working distance is proportional to the range of the distance between the positive lens group <NUM> and the negative lens group <NUM>, as shown in <FIG>. The positive lens group <NUM> comprises at least two optical lenses made of different materials. The negative lens group <NUM> comprises at least two optical lenses made of different materials. The negative lens group <NUM> is close to an object to be observed, and comprises an outer side surface <NUM> and an inner side surface <NUM>. Both the outer side surface <NUM> and the inner side surface <NUM> are concave surfaces. An absolute value of radius of curvature of the outer side surface <NUM> is smaller than an absolute value of radius of curvature of the inner side surface <NUM>.

A binocular observation optical path <NUM> is preferably adopted in the present application. Each observation optical path <NUM> is internally provided with a zoom lens group <NUM>, a first tube objective lens <NUM> and a photosensitive element <NUM>. Two observation optical paths <NUM> share one large objective lens group <NUM>. Two optical paths of zoom lens groups <NUM> realize observation of different magnifications, and whole and local observation of an affected part can be carried out. The zoom lens group <NUM> is preferably an afocal Galileo structure, and can be divided into stepped zoom or continuous zoom. When the zoom lens group <NUM> is of a continuous zoom structure, the zoom lens group <NUM> comprises at least two groups of second lenses <NUM>. The second lenses <NUM> can be driven to move along respective optical axis directions. With the combination of the zoom lens group <NUM> and a large objective lens with a variable focal length, the microsurgery auxiliary device of the present application can conveniently observe tissue structures at different depths with different magnifications.

The microsurgery auxiliary device of the present application further comprises a support <NUM>, the support <NUM> comprises a base <NUM>, a supporting rod <NUM> vertically mounted on the base <NUM>, a large cross arm <NUM> rotatably mounted on the supporting rod <NUM>, a small cross arm <NUM> rotatably mounted on the large cross arm <NUM>, a balance arm <NUM> rotatably mounted on the small cross arm <NUM>, and the lens body <NUM> is mounted on the balance arm <NUM>, as shown in <FIG> or <FIG>.

The naked eye 3D display <NUM> is connected to the photosensitive element <NUM>. The size of the naked eye 3D display <NUM> is between <NUM>-<NUM> inches. As shown in <FIG>, the viewing distance between the naked eye 3D display and an observer <NUM> is <NUM>-<NUM>. The viewing angle range of the naked eye 3D display is not less than <NUM> degrees, and preferably, the viewing angle is not less than <NUM> degrees. The naked eye 3D display can be fixed with different fixing modes according to different field conditions and using habits, and the fixing structure is simple and reliable. For example, the naked eye 3D display may be mounted on the upper surface of the large cross arm <NUM> and located above the supporting rod <NUM>, as shown in <FIG>, or may be hung from the lower surface of the large cross arm <NUM>, as shown in <FIG>, or may be directly mounted on the supporting rod <NUM>, as shown in <FIG>. The naked eye 3D display, whether mounted on the large cross arm <NUM> or the supporting rod <NUM>, may be rotatably mounted, fixedly mounted, or detachably or movably mounted. Meanwhile, the naked eye 3D display <NUM> may not be mounted on the support <NUM> of the auxiliary device, and may be placed on the ground through the base body <NUM> and the connecting rod <NUM>, as shown in <FIG>, or hung on a roof, as shown in <FIG>. The naked eye 3D display <NUM> is mounted at one end of the connecting rod <NUM>, and the other end of the connecting rod <NUM> is movably mounted on the base body <NUM>. The connecting rod <NUM> can be driven to move relative to the base body <NUM> along the axis thereof or rotate with the axis thereof as a rotating axis, so as to adjust the mounting position of the naked eye 3D display <NUM>. The naked eye 3D display is arranged within a range of <NUM>-<NUM>, which is close to the observation distance of common clinical equipment. When the observer <NUM> switches an observation line of sight between the display and other equipment, human eyes do not need to repeatedly focus, time and labor are saved, brightness has no loss, and visual fatigue is reduced. Besides, a closer observation distance is in line with a human eye's habit of approaching when distinguishing details. In the present application, a naked eye 3D display serves as the naked eye 3D display <NUM>, so that the observer <NUM> can directly perform surgical operations by observing the naked eye 3D display, the overall structure of the device is simple, complex data processing of images is not required, and system delay is small. In addition, with the naked eye 3D display, the observer <NUM> can clearly observe an object to be observed within a certain range of observation angles without adjusting the orientation of the display. Taking dental clinic as an example, a doctor is usually at the six-o'clock position. When it is necessary to examine or operate maxillary molars temporarily, the doctor may move to the nine-o'clock and three-o'clock positions. At this time, normal observation can also be realized without adjusting the orientation angle of the display, as shown in <FIG>.

In a further embodiment, the microsurgery auxiliary device further comprises an acquisition device, a processing device and a driving device. The acquisition device can be configured to acquire eye position information of the observer <NUM>. The processing device can be configured to control the driving device to act according to acquired eye position information so as to adjust the display angle of the naked eye 3D display <NUM>, such that the naked eye 3D display <NUM> automatically tracks eyes of the observer <NUM> and rotates therewith to ensure an optimal observation angle.

The lens body <NUM> is further internally provided with at least one illumination unit <NUM>. The illumination light of each illumination unit <NUM> can illuminate an object to be observed through the large objective lens group <NUM>. The direction of the illumination light entering the large objective lens group <NUM> is parallel to the direction of the optical axis of the large objective lens group <NUM>. The reflection loss thus can be reduced. Symmetrical dual optical paths <NUM> may be arranged to enhance illumination intensity, the transverse volume of the system is compressed, and lens body balance is facilitated, as shown in <FIG>. The illumination unit <NUM> comprises a light source assembly <NUM>, a condensing lens group <NUM>, a diaphragm <NUM>, and a projection lens group <NUM>, which are sequentially positioned in the same illumination optical path <NUM>. The light source assembly <NUM> comprises at least one LED light source <NUM>, and at least one of the LED light sources <NUM> in the light source assembly <NUM> can be driven to switch to the illumination optical path <NUM> to illuminate an object to be observed. For example, apart from a white light source, the light source assembly <NUM> also comprises at least one monochromatic light source (for a fluorescent mode) which can be switched with the white light source to enter the illumination optical path <NUM>. The projection lens group <NUM> comprises at least one first lens <NUM> which can be driven to move along the direction of the optical axis.

In a further embodiment, the microsurgery auxiliary device of the present application may also be provided with a transmission device between the projection lens group <NUM> and the zoom lens group <NUM> to enable the linkage of the projection lens group <NUM> and the zoom lens group <NUM>, as shown in <FIG>. The transmission device is not shown, and the link relation between the projection lens group <NUM> and the zoom lens group <NUM> is schematically shown in a broken line. In the case of observation at a low magnification, the diameter of a field of view of object plane imaging is large, and an illumination optical spot needs to cover the entire object plane field of view at this time. However, when switching to a high magnification, the diameter of the field of view of the object plane is rapidly reduced, and the projection lens group <NUM> of the illumination optical path <NUM> is correspondingly adjusted at this time, so that the illumination optical spot can also be reduced accordingly, thereby reducing possible optical damage risks to tissues outside the field of view. At the same time, it is also conducive to improving the illumination inside the field of view and compensating for the reduction of subjective brightness of human eyes during high magnification observation.

In a further embodiment, when necessary, the microsurgery auxiliary device of the present application may also be provided with an observation unit <NUM> on the lens body <NUM> to realize conventional visual observation, as shown in <FIG>. As shown in <FIG>, the observation unit <NUM> comprises an eyepiece <NUM>, a turning lens group <NUM> (or a prism group), and a second tube objective lens <NUM>. The imaging unit <NUM> further comprises a spectroscope group <NUM>. In the same observation optical path <NUM>, light sequentially passes through the large objective lens group <NUM> and the zoom lens group <NUM> to reach the spectroscope group <NUM>. The spectroscope group <NUM> splits the light into two parts, one part sequentially passes through the first tube objective lens <NUM> to reach the photosensitive element <NUM>, and the other part sequentially passes through the second tube objective lens <NUM>, the turning lens group <NUM> and the eyepiece <NUM>. In this way, when in use, the observer <NUM> can not only observe an object to be observed through the naked eye 3D display <NUM>, but also observe the object to be observed in a conventional visual observation mode, which greatly enhances the operability and adaptability of the microsurgery auxiliary device.

As used herein, the terms "comprise," "include" or any other variations thereof, are intended to cover a non-exclusive inclusion in addition to those elements listed and may also include other elements not expressly listed.

As used herein, positional words such as front, back, upper and lower are defined by positions of parts in drawings and between the parts, which are only for clarity and convenience of expressing the technical solution. It is to be understood that use of such positional words should not limit the protection scope claimed in the present invention.

The embodiments and features in the embodiments described above herein can be combined without conflict.

Claim 1:
A microsurgery auxiliary device, comprising a lens body (<NUM>) and a 3D display (<NUM>), wherein the lens body (<NUM>) is internally provided with an imaging unit (<NUM>), wherein the imaging unit (<NUM>) comprises a large objective lens group (<NUM>) and two observation optical paths (<NUM>), wherein each observation optical path (<NUM>) is internally provided with a zoom lens group (<NUM>), a first tube objective lens (<NUM>) and a photosensitive element (<NUM>), wherein the two observation optical paths (<NUM>) share the large objective lens group (<NUM>), wherein the zoom lens group (<NUM>), the first tube objective lens (<NUM>) and the photosensitive element (<NUM>) are each sequentially positioned in the respective observation optical path (<NUM>), wherein the large objective lens group (<NUM>) comprises at least one positive lens group (<NUM>) and at least one negative lens group (<NUM>), the positive lens group (<NUM>) and the negative lens group (<NUM>) are arranged in the same optical axis, a distance between the positive lens group (<NUM>) and the negative lens group (<NUM>) is adjustable, the 3D display (<NUM>) is connected to the photosensitive element (<NUM>)
characterized in that
the 3D display is a naked-eye 3D display,
the distance between the naked eye 3D display (<NUM>) and an observer (<NUM>) is <NUM>-<NUM>, and a viewing angle range of the naked eye 3D display (<NUM>) is not less than <NUM> degrees, wherein the size of the naked eye 3D display (<NUM>) is between <NUM>-<NUM> inches, wherein two illumination optical paths (<NUM>) are symmetrically arranged in the lens body (<NUM>) with respect to the two observation optical paths (<NUM>).