OPTICAL ACTIVITY DETECTING DEVICE

An optical activity detecting device is provided. The optical activity detecting device is adapted to detect an object. The optical activity detecting device includes a light source, a filter, a first polarizer, a second polarizer, a first compensation film and a first detector. The light source provides a light beam. The light beam travels from the light source, passes through the filter and the first polarizer, and enters the object. At least a portion of the light beam travels from the object, passes through the second polarizer and the first compensation film and is received by the first detector.

CROSS REFERENCE TO RELATED APPLICATIONS

This application claims priority of Taiwan Patent Application No. 110140706, filed on Nov. 2, 2021, the entirety of which is incorporated by reference herein.

BACKGROUND OF THE INVENTION

Field of the Invention

The present invention relates to a detecting device, and in particular to an optical activity detecting device.

Description of the Related Art

Optical activity detecting technology can be utilized to blood glucose test.

Conventional optical activity detecting device has a light source, and an optical analyzer, which detects the eye of the testee. The conventional light source and the optical analyzer have complex structure and increased cost, and the conventional optical activity detecting device is thus huge and not easy to move, which cannot realize continuous non-invasive detection.

BRIEF SUMMARY OF THE INVENTION

Embodiments of the invention are provided to address the aforementioned difficulty.

In one embodiment, an optical activity detecting device is provided. The optical activity detecting device is adapted to detect an object. The optical activity detecting device includes a light source, a filter, a first polarizer, a second polarizer, a first compensation film and a first detector. The light source provides a light beam. The light beam travels from the light source, passes through the filter and the first polarizer, and enters the object. At least a portion of the light beam travels from the object, passes through the second polarizer and the first compensation film and is received by the first detector.

In one embodiment, the phase difference between the first polarizer and the second polarizer is 90 degrees or 0 degrees.

In one embodiment, the optical activity detecting device further comprises a substrate and a first spacer, the light source and the first detector are disposed on the substrate, and the first spacer is disposed between the light source and the first detector.

In one embodiment, the optical activity detecting device further comprises a third polarizer, a second compensation film and a second detector. At least a portion of the light beam travels from the object, passes through the third polarizer and the second compensation film, and is received by the second detector.

In one embodiment, the phase difference between the first polarizer and the second polarizer is 90 degrees, and the phase difference between the first polarizer and the third polarizer is 0 degrees.

In one embodiment, the optical activity detecting device further comprises a substrate and a first spacer, wherein the light source, the first detector and the second detector are disposed on the substrate, and the first spacer is disposed between the light source and the first detector.

In one embodiment, the optical activity detecting device further comprises a second spacer, wherein the second spacer is disposed between the first detector and the second detector.

In one embodiment, the optical activity detecting device is a wearable device, and the light source, the filter, the first polarizer, the second polarizer, the first compensation film and the first detector are integrated into on single module package.

In one embodiment, the light source comprises an edge-emitting semiconductor laser source, a vertical cavity surface emitting laser source, light-emitting diodes of organic or inorganic materials without specific polarization characteristics, a near infrared light source or an infrared light source.

In one embodiment, the first detector comprises Si, GaAs or InGaAs.

In one embodiment, the first polarizer and the second polarizer comprise organic polymer materials or inorganic crystal materials.

In one embodiment, the first compensation film comprises liquid-crystal polymer (LCP).

In one embodiment, the filter corresponds to a particular wavelength half-width.

In one embodiment, the optical activity detecting device further comprises a first lens unit and a second lens unit, wherein the light beam travels from the light source, passes through the filter, the first polarizer and the first lens, and enters the object, and at least a portion of the light beam travels from the object, passes through the second lens unit, the second polarizer and the first compensation film, and is received by the first detector.

In one embodiment, the first lens comprises a concave lens, and the second lens comprises a convex lens.

In one embodiment, an optical activity detecting device is provided. The optical activity detecting device includes a light source, a first polarizer, a second polarizer and a first detector. The light source provides a light beam. The light beam travels from the light source, passes through the first polarizer, and enters the object. The phase difference between the first polarizer and the second polarizer is 90 degrees or 0 degrees. At least a portion of the light beam travels from the object, passes through the second polarizer and is received by the first detector.

In the embodiment of the invention, the optical activity detecting device can be a wearable device, and is wear on the head of the testee. The light source, the filter, the first polarizer, the second polarizer, the first compensation film and the first detector are integrated into on single module package. The optical activity detecting device of the embodiment of the invention has simpler structure, small size and decreased cost, which can be carried easily, and can realize continuous non-invasive detection.

DETAILED DESCRIPTION OF THE INVENTION

FIG.1shows an optical activity detecting device of a first embodiment of the invention. With reference toFIG.1, the optical activity detecting device D1of the first embodiment of the invention is adapted to detect an object (not shown). The optical activity detecting device D1includes a light source1, a filter2, a first polarizer31, a second polarizer32, a first compensation film41and a first detector51. The light source1provides a light beam L. The light beam L travels from the light source1, passes through the filter2and the first polarizer31, and enters the object (not shown). At least a portion of the light beam L travels from the object (not shown), passes through the second polarizer32and the first compensation film41and is received by the first detector51.

With reference toFIG.1, in one embodiment, the phase difference between the first polarizer31and the second polarizer32is 90 degrees or 0 degrees. However, the disclosure is not meant to restrict the invention. In other embodiment, the phase difference between the first polarizer31and the second polarizer32can be modified. For example, the phase difference between the first polarizer31and the second polarizer32can be 45 degrees.

In one embodiment, the phase difference between the first polarizer31and the second polarizer32is 90 degrees. When there is specific rotation, the light intensity is increased with the specific rotation.

In other embodiment, the phase difference between the first polarizer31and the second polarizer32is 0 degrees. When there is specific rotation, the light intensity is decreased with the specific rotation.

With reference toFIG.1, in one embodiment, the optical activity detecting device further comprises a substrate6and a first spacer71. The light source1and the first detector51are disposed on the substrate6. The first spacer71is disposed between the light source1and the first detector51.

In one embodiment, the light source1comprises an edge-emitting semiconductor laser source, a vertical cavity surface emitting laser source, light-emitting diodes of organic or inorganic materials without specific polarization characteristics, a near infrared light source or an infrared light source.

In one embodiment, the first detector51includes Si, GaAs or InGaAs.

In one embodiment, the first polarizer31and the second polarizer32include organic polymer materials or inorganic crystal materials.

In one embodiment, the first compensation film41includes liquid-crystal polymer (LCP). The compensation film compensates the phase deflection or the optical activity of the optical system.

In one embodiment, the filter is utilized to purify wavelength (reducing half-width).

With reference toFIG.1, in one embodiment, the optical activity detecting device D1further comprises a first lens unit81and a second lens unit82. The light beam travels L from the light source1, passes through the filter2, the first polarizer31and the first lens81, and enters the object (not shown), and at least a portion of the light beam L travels from the object (not shown), passes through the second lens unit82, the second polarizer32and the first compensation film41, and is received by the first detector51.

With reference toFIG.1, in one embodiment, the first lens81includes a concave lens to homogenize light distribution. The second lens82includes a convex lens to collect light. The disclosure is not meant to restrict the invention.

FIG.2shows an optical activity detecting device of a second embodiment of the invention. With reference toFIG.2, in this embodiment, the light source1is disposed on a first substrate61, and the first detector51is disposed on a second substrate62. In the embodiment of the invention, the light source unit (including the light source1, the filter2, the first polarizer31and the first lens81) and the detection unit (including the second lens82, the second polarizer32, the first compensation film41and the detector51) can be integrated in one single device housing (the first embodiment) or disposed in different device housings (the second embodiment). The disclosure is not meant to restrict the invention.

FIG.3shows an optical activity detecting device of a third embodiment of the invention. With reference toFIG.3, in this embodiment, the optical activity detecting device D3further comprises a third lens83, a third polarizer33, a second compensation film42and a second detector52. At least a portion of the light beam L travels from the object (not shown), passes through the third lens83, the third polarizer33and the second compensation film42, and is received by the second detector52.

With reference toFIG.3, in one embodiment, the phase difference between the first polarizer31and the second polarizer32is 90 degrees, and the phase difference between the first polarizer31and the third polarizer33is 0 degrees. Therefore, the detected results of the first detector51and the second detector52can be cross reference.

With reference toFIG.3, in one embodiment, the optical activity detecting device further comprises a substrate6′ and a first spacer71. The light source1, the first detector51and the second detector52are disposed on the substrate6′. The first spacer71is disposed between the light source1and the first detector51.

With reference toFIG.3, in one embodiment, the optical activity detecting device D3further comprises a second spacer72. The second spacer72is disposed between the first detector51and the second detector52.

FIG.4shows an optical activity detecting device of a fourth embodiment of the invention. With reference toFIG.4, in this embodiment, the first detector51′ and the second detector52′ of the optical activity detecting device D4are integrated into a detector array module53.

In one embodiment, the object can be an eyeball. The sizes of the light source, the filter, the first polarizer, the second polarizer, the first compensation film and the first detector are much smaller than the size of the object.

In the embodiment of the invention, the optical activity detecting device can be a wearable device, and is wear on the head of the testee. The light source, the filter, the first polarizer, the second polarizer, the first compensation film and the first detector are integrated into on single module package. The optical activity detecting device of the embodiment of the invention has simpler structure, small size and decreased cost, which can be carried easily, and can realize continuous non-invasive detection.