TWI540316B - Optical detection device and optical path adjuster therein - Google Patents

Description

Optical detection device and optical path adjuster

The present disclosure relates to an optical detecting device and an optical path adjusting device thereof, and more particularly to an optical detecting device and an optical path adjusting device that are both fixed to the object to be tested and the detector.

The optical detecting device determines the characteristics of the reaction or the characteristics of the object to be tested according to the light absorbed by the biological or chemical reaction of the object itself or the light emitted by the object itself after the excitation light is absorbed. Please refer to FIG. 1, which is a schematic diagram of a conventional optical detecting device. As shown in FIG. 1 , when the object to be tested 1100 is to be detected, the test object 1100 is detected by hitting the excitation light to the object to be tested 1100 and receiving the light emitted by the object to be tested by the detector 1000. the goal of. However, when the object to be tested 1200 is to be inspected, one of the object to be tested 1200 or the detector 1000 must be moved, so that the path of the light can be accurately established between the object to be tested 1200 and the detector 1000. However, if the object to be tested 1200 is moved, the light emitted by the object to be tested 1200 when it is subjected to vibration may be different from the light emitted by the object when it is stationary. In the case of the motion detector 1000, it is impossible to avoid the optical detection interference caused by the vibration factor.

In view of the above problems, the present disclosure proposes an optical inspection device Place the light path adjuster with it. With the optical path adjuster proposed by the present disclosure, both the object to be tested and the optical detector in the optical detecting device can be fixed without moving.

A light path adjustment according to one or more embodiments of the present disclosure The whole instrument includes: base, grating plate, mirror and rotary drive module. The rotary drive module is connected to the base and is respectively connected to the grating plate and the mirror. The grating disk includes an annular sidewall and a first optical channel extending through the annular sidewall. The rotary driving module is configured to drive the grating disk to rotate at a first rotation amount, and drive the mirror to rotate at a second rotation amount, wherein the grating disk rotates coaxially with the mirror system.

Optical detection according to one or more embodiments of the present disclosure The device comprises: a plurality of detection slots, a light path chamber, a plurality of optical fibers, an optical path adjuster and an optical detector. The detection slot is used to place the object to be tested. The optical path chamber includes: a circular side wall and a plurality of fiber holders equally spaced on the side wall of the optical path chamber. One end of each fiber is fixed to one of the fiber holders, and the other end is connected to one of the detection slots. The optical path adjuster is fixed to the optical path room, and the optical path adjuster comprises: a base, a grating plate, a mirror and a rotary driving module. The rotary drive module is connected to the base and is respectively connected to the grating plate and the mirror. The base is provided with a detection hole. The grating disk includes an annular sidewall and a first optical channel extending through the annular sidewall. The rotary driving module is configured to drive the grating disk to rotate at a first rotation amount, and drive the mirror to rotate by a second rotation amount, wherein the grating disk and the mirror system are common The shaft is rotated and the first optical channel is aligned with one of the optical fibers. The optical detector is fixed to the optical path chamber and receives light through the detection hole.

The above description of the disclosure and the following embodiments are intended to illustrate and explain the spirit and principles of the disclosure, and to provide further explanation of the scope of the disclosure.

2000‧‧‧Optical inspection device

2110~2150‧‧‧Detection tank

2200‧‧‧Light path room

2201‧‧‧round side wall

2210~2250‧‧‧ fiber holder

2310~2350‧‧‧ fiber

2400‧‧‧Light path adjuster

2410, 2410' ‧ ‧ pedestal

2420, 2420'‧‧‧ raster disk

2421, 2421'‧‧‧Ring side wall

2423‧‧‧First light channel

2425~2429‧‧‧Second light channel

2430‧‧‧Mirror

2440‧‧‧Rotary drive module

2441, 2443~2445‧‧‧ gears

2442‧‧‧Belt

2446‧‧‧Drive shaft

2450‧‧‧Rotary axis

2500‧‧‧Optical detector

2510‧‧‧Light source

2520‧‧‧Optical detection components

2530‧‧‧beam splitter

Fig. 1 is a schematic view of a conventional optical detecting device.

Figure 2 is a partial plan view of an optical detecting device in accordance with an embodiment of the present disclosure.

FIG. 3A is a perspective view of an optical path adjuster according to an embodiment of the present disclosure.

Figure 3B is a top plan view of an optical path adjuster in accordance with an embodiment of the present disclosure.

3C is a side cross-sectional view of the optical path adjuster in accordance with an embodiment of the present disclosure.

The 3D figure is an exploded view of the optical path adjuster corresponding to FIG. 3A.

4A to 4C are top plan views of device states in which the optical detecting device according to an embodiment of the present disclosure has different light paths, respectively.

FIG. 5A is a top plan view of an optical path adjuster according to another embodiment of the present disclosure.

Figure 5B is a schematic cross-sectional view corresponding to Figure 5A.

6A to 6C are top plan views of device states in which the optical detecting device according to another embodiment of the present disclosure has different light paths, respectively.

Figure 7 is a partial schematic view showing the configuration of an optical detector according to an embodiment of the present disclosure.

The detailed features and advantages of the present disclosure are described in detail in the following detailed description of the embodiments of the present disclosure, which are The objects and advantages associated with the present disclosure can be readily understood by those skilled in the art. The following examples are intended to further illustrate the present disclosure, but are not intended to limit the scope of the disclosure.

Please refer to FIG. 2, which is a partial plan view of an optical detecting device according to an embodiment of the present disclosure. As shown in FIG. 2, the optical detecting device 2000 includes a detecting tank 2110, a detecting tank 2120, a detecting tank 2130, a detecting tank 2140, a detecting tank 2150, an optical path chamber 2200, an optical fiber 2310, an optical fiber 2320, an optical fiber 2330, an optical fiber 2340, and an optical fiber. 2350, optical path adjuster 2400 and optical detector 2500. In other words, the optical detecting device 2000 has more than one detecting slot and more than one optical fiber, wherein the number of optical fibers corresponds to the number of detecting slots, and the optical fiber holder 2210 is disposed on the circular side wall 2201 of the optical path chamber 2200. The fiber holder 2220, the fiber holder 2230, the fiber holder 2240, and the fiber holder 2250. The angle between the two adjacent fiber optic sockets in the present embodiment is the same as the center of the circular side wall 2201, for example, 30 degrees. Each fiber is connected between a fiber holder and a detection slot. For example, the first end 2311 of the fiber 2310 is fixed to the fiber holder 2210, and the second end 2313 of the fiber 2310. Connected to the detection tank 2110.

The optical path adjuster 2400 is fixed to the optical path room 2200, and the optical path The adjuster 2400 is shown in FIG. 3A to FIG. 3C , wherein FIG. 3A is a perspective view of the optical path adjuster according to an embodiment of the present disclosure, and FIG. 3B is a top view of the optical path adjuster according to an embodiment of the present disclosure. 3C is a side cross-sectional view of the optical path adjuster in accordance with an embodiment of the present disclosure. The optical path adjuster 2400 in one embodiment of the present disclosure may include a base 2410, a grating disk 2420, a mirror 2430, and a rotary drive module 2440. The rotary driving module 2440 is connected to the base 2410 and is respectively connected to the grating disk 2420 and the mirror 2430.

The grating disk 2420 includes an annular sidewall 2421 and a through-ring side The first light channel 2423 of the wall 2421. The rotary drive module 2440 is configured to drive the grating disk 2420 to rotate by a first amount of rotation, and drive the mirror 2430 to rotate by a second amount of rotation, wherein the grating disk 2420 and the mirror 2430 both rotate about the rotation axis 2450.

And in one embodiment, as shown in FIG. 3C, the pedestal 2410 A detection hole 2411 is provided on the side wall, and the shape center 2411C of the detection hole 2411 has a detection hole height HE compared to the bottom surface 2410B of the base 2410. The upper edge 2430U of the mirror 2430 has a first mirror height HM1 compared to the bottom surface 2410B of the base 2410, and the lower edge 2430B of the mirror 2430 has a second mirror height HM2 compared to the bottom surface 2410B of the base 2410. The shape center 2423C of the optical channel 2423 has a light channel height HC compared to the bottom surface 2410B of the pedestal 2410, and the average value of the detection hole height HE and the optical channel height HC is between the first The mirror height HM1 is between the second mirror height HM2. In other words, the light emitted from the first light channel 2423 is reflected by the mirror 2430 and is incident on the detection hole 2411. The detection hole can be fixed to the optical detector 2500, or a fiber can be fixed, so that the light that is incident on the detection hole 2411 is transmitted to the optical detector 2500 by the optical fiber. In the present embodiment, the mirror surface of the mirror 2430 is aligned with the rotating shaft 2450. However, in other embodiments, the mirror surface of the mirror 2430 may not be aligned with the rotation axis 2450, but may be slightly tilted to specifically guide the reflected light to the height of the detection hole 2411.

Specifically, please refer to FIG. 3D, which is an exploded view of the optical path adjuster corresponding to FIG. 3A. As shown in FIG. 3D, the rotary drive module 2440 includes a motor (not shown), a gear 2441, a belt 2442, a gear 2443, a gear 2444, a gear 2445, and a drive shaft 2446. The gear 2441 is fixed to the annular side wall 2421 of the grating disk 2420, and the wheel center of the gear 2441 is aligned with the rotating shaft 2450. Therefore, when the gear 2441 rotates once, the annular side wall 2421 of the grating disk 2420 also rotates one turn. . The gear 2441 is engaged with the belt 2442, and the belt 2442 is meshed with the gear 2443, so the gear 2441 drives the gear 2443 by the belt 2442. Since the thickness T3 of the gear 2443 is thicker than the thickness T4 of the gear 2444 and the thickness T5 of the gear 2445, the gear 2443 can be meshed with the gear 2444, and the gear 2444 is meshed with the gear 2445, whereby the gear 2443 drives the gear 2444, and the gear 2444 drives Gear 2445. The gear ratio of the gear 2441, the gear 2443, the gear 2444, and the gear 2445 is exemplified as 1:1:1:2. Therefore, when the gear 2441 rotates one turn, the gear 2443 and the gear 2444 both rotate. One turn, and the gear 2445 will rotate half a turn. In other words, when the motor drive gear 2445 is rotated 10 degrees, the gear 2441 is rotated 20 degrees. One end of the transmission shaft 2446 is fixed to the mirror 2430, and the other end of the transmission shaft 2446 is fixed to the gear 2445. Thereby, the ratio of the first amount of rotation to the second amount of rotation is 2 or a fixed value. In order to achieve the ratio of the rotation amount, the planetary gear combination method is a representative description, and other motor drive combinations may be used for this purpose, and the present disclosure may not be limited.

Therefore, please refer to the 4A to 4C drawings in order, and the points are A schematic top view of a device state in which the optical detecting device according to an embodiment of the present disclosure has different light paths. It can be seen from FIG. 4A that the position of the detecting hole 2411 corresponds to the fiber holder 2210. Therefore, as shown in FIG. 4A, when the experimenter wants to inspect the biochemical substance in the detecting tank 2110, the rotary driving module 2440 in the optical path adjuster 2400 drives the grating disk 2420 to rotate about the rotating shaft 2450, so that the first light The channel 2423 is aligned with the fiber holder 2210, and the rotary driving module 2440 drives the mirror 2430 to rotate, so that the mirror surface of the mirror 2430 and the shape center of the rotating shaft 2450, the first light channel 2423 and the shape center of the detecting hole 2411 are formed. The plane is orthogonal (vertical). Thus, referring to FIG. 4A and FIG. 3C together, the light passing through the first optical path 2423 from the fiber holder 2210 is reflected by the mirror 2430 to the detection hole 2411 so as to be received by the optical detector 2500.

Then as shown in Figure 4B, when the experimenter wants to test the detection slot Rotary drive module in light path adjuster 2400 when biochemical in 2120 The 2440 will drive the grating disk 2420 to rotate about the rotating shaft 2450, so that the first optical channel 2423 is aligned with the fiber holder 2220, and the rotary driving module 2440 drives the mirror 2430 to rotate, so that the rotating shaft 2450 and the first optical channel 2423 The plane A formed by the shape center 2423C and the angle bisector plane C of the plane B formed by the rotation axis 2450 and the shape center 2411C of the detection hole 2411 are orthogonal (perpendicular) to the mirror surface of the mirror 2430. Thus, referring to FIGS. 4B and 3C, the light passing through the first optical path 2423 from the fiber holder 2220 is reflected by the mirror 2430 to the detection hole 2411 so as to be received by the optical detector 2500. The grating disk 2420 in Fig. 4B is rotated by 30 degrees compared to the grating disk 2420 in Fig. 4A, and the mirror 2430 in Fig. 4B is rotated by 15 degrees compared to the mirror 2430 in Fig. 4A.

Then, as shown in Figure 4C, when the experimenter wants to test the detection slot In the biochemical of 2130, the rotary drive module 2440 in the optical path adjuster 2400 drives the grating disk 2420 to rotate about the rotating shaft 2450, so that the first optical channel 2423 is aligned with the fiber holder 2230, and the rotary driving module 2440 will The driving mirror 2430 is rotated such that the plane A' formed by the rotating shaft 2450 and the shape center 2423C of the first optical path 2423 and the angle bisector C of the plane B' formed by the rotating shaft 2450 and the shape center 2411C of the detecting hole 2411 'Orthogonal (vertical) to the mirror surface of the mirror 2430. Thus, referring to FIG. 4C and FIG. 3C together, the light passing through the first optical path 2423 from the fiber holder 2230 is reflected by the mirror 2430 to the detection hole 2411 so as to be received by the optical detector 2500. The grating disk 2420 in Fig. 4C is compared to the grating disk in Fig. 4B The 2420 is rotated by 30 degrees, and the mirror 2430 in Fig. 4C is rotated 15 degrees compared to the mirror 2430 in Fig. 4B.

The optical path adjuster according to another embodiment of the present disclosure has a large structure For the difference of the optical path adjuster 2400, please refer to FIG. 5A and FIG. 5B, wherein FIG. 5A is a top view of the optical path adjuster according to another embodiment of the present disclosure, and Figure 5B is a schematic cross-sectional view corresponding to Figure 5A. As shown in FIG. 5A, the annular side wall 2421' of the grating disk 2420' of the optical path adjuster 2400' in this embodiment has a through-ring in addition to the first optical path 2423 extending through the annular side wall 2421'. Second optical channels 2425, 2426, 2427, 2428 and 2429 of the side walls 2421'. Wherein the distance between the second optical channels is equal, the angular difference between the second optical channels is equal to the angular difference between the fiber holders on the circular side wall 2201 of the optical path chamber 2200, and the first optical channel 2423 and the second The distance between the light channels 2425 is smaller than the distance between the second light channels 2425 and the second light channels 2426. Moreover, the shape center 2411C' of the detecting hole 2411' on the side wall of the pedestal 2410' has a detecting hole height HE' compared to the bottom surface 2410B' of the pedestal 2410', and the detecting hole height HE' is equal to the shape of the first light path 2423. The center 2423C' is compared to the first optical channel height HC1 of the bottom surface 2410B' of the pedestal 2410', and the first optical channel height HC1 is equal to the shape center of the second optical channel (not shown) compared to the pedestal 2410'. The second optical path height HC2 of the bottom surface 2410B'. In addition, the upper edge 2430U of the mirror 2430 has a first mirror height HM1' compared to the bottom surface 2410B' of the base 2410', and the lower edge 2430B of the mirror 2430 is compared to the bottom surface of the base 2410'. 2410B' has a second mirror height HM2'. The first optical path height HC1, the second optical path height HC2, and the detection hole height HE' are both between the first mirror height HM1' and the second mirror height HM2'.

Therefore, please refer to the 6A to 6C drawings in order, and the points are A schematic top view of a device state in which the optical detecting device according to another embodiment of the present disclosure has different light paths. Wherein, as shown in FIG. 6A, when the experimenter wants to inspect the biochemical substance in the detecting tank 2110, the rotary driving module 2440 in the optical path adjuster 2400 drives the grating disk 2420' (not shown) around the rotating shaft. The rotation of the 2450 causes the first optical channel 2423 to be aligned with the fiber holder 2210 while the second optical channel 2425 is aligned with the detection hole 2411', and the rotary driving module 2440 drives the mirror 2430 to rotate, such that the rotating shaft 2450 and the first light The plane A formed by the shape center 2423C of the passage 2423 and the angle bisector plane C of the plane B formed by the rotation shaft 2450 and the shape center 2425C of the second light passage 2425 are orthogonal (perpendicular) to the mirror surface of the mirror 2430. Thus, the light passing from the fiber holder 2210 through the first light path 2423 is reflected by the mirror 2430 to the second light path 2425 and then passed through the detection hole 2411' so as to be received by the optical detector 2500.

Then, as shown in Figure 6B, when the experimenter wants to test the detection slot In the case of the biochemical substance in 2120, the rotary drive module 2440 in the optical path adjuster 2400 drives the grating disk 2420' to rotate about the rotational axis 2450, so that the first optical channel 2423 is aligned with the fiber holder 2220 while the second optical channel 2426 Aligning the detection hole 2411', and the rotary drive module 2440 drives the mirror 2430 to rotate. The plane A' formed by the rotation axis 2450 and the shape center 2423C of the first light tunnel 2423 and the angle bisector plane C' of the plane B' formed by the rotation axis 2450 and the shape center 2426C of the second light tunnel 2426 are orthogonal ( Vertically to the mirror surface of the mirror 2430. Thus, the light passing from the fiber holder 2220 through the first light path 2423 is reflected by the mirror 2430 to the second light path 2426 and then passes through the detection hole 2411' so as to be received by the optical detector 2500. The grating disk 2420' in Fig. 6B is rotated by 30 degrees compared to the grating disk 2420' in Fig. 6A, and the mirror 2430 in Fig. 6B is rotated 15 degrees compared to the mirror 2430 in Fig. 6A. .

Then, as shown in Figure 6C, when the experimenter wants to test the detection slot In the biochemical of 2130, the rotary drive module 2440 in the optical path adjuster 2400 drives the grating disk 2420' to rotate about the rotational axis 2450, such that the first optical channel 2423 is aligned with the fiber holder 2230 while the second optical channel 2427 The detection hole 2411' is aligned, and the rotation driving module 2440 drives the mirror 2430 to rotate, such that the plane A" formed by the rotation axis 2450 and the shape center 2423C of the first light channel 2423 and the rotation axis 2450 and the second light channel The angle bisector C" of the plane B" formed by the shape center 2427C of 2427 is orthogonal (perpendicular) to the mirror surface of the mirror 2430. Thus, the light passing through the first optical path 2423 from the fiber holder 2230 is reflected by the mirror 2430. To the second optical channel 2427 and then through the detection aperture 2411', which can be received by the optical detector 2500. The grating disk 2420' in Fig. 6C is rotated 30 degrees compared to the grating disk 2420' in Fig. 6B. Mirror 2430 in Figure 6C is compared to mirror in Figure 6B The 2430 turned 15 degrees.

In addition, in one embodiment, if the substance to be tested is sent In the case of a biological sample of light, a substance containing biochemical energy, such as adenosine triphosphate (ATP), is added to the detection tanks 2110 to 2150, and the substance to be tested can emit biochemical energy from adenosine triphosphate to emit light. The emitted light enters the optical path chamber 2200 through the optical fiber and is then reflected by the mirror 2430 in the optical path adjuster 2400 to the optical detector 2500. In this embodiment, the optical detector 2500 is only used to receive and analyze light, so there is no need to emit light.

In another embodiment, if the test to be performed is a couplet In the immunosorbent assay, or enzyme-linked immunosorbent assay (ELISA), the detection tanks 2110~2150 should be replaced with flat-bottomed transparent tubes, and a light source is arranged at the bottom of the tubes, and the tubes are provided with optical fibers. The light source emits light having a specific wavelength, and a part of the light is absorbed by the object to be tested, and the remaining light can enter the optical path chamber 2200 via the optical fiber, and then reflected by the mirror 2430 in the optical path adjuster 2400 for optical detection. Instrument 2500. Therefore, the optical detector 2500 can calculate and determine the concentration of the antigen/antibody in the current analyte according to the intensity of the received light. Wherein, the depth of the solution to be tested in each detection tank should be consistent or conform to a specific depth. In this embodiment, the optical detector 2500 is only used to receive and analyze light, so there is no need to emit light.

In still another embodiment, the object to be tested is excited at a specific wavelength. For the light to be tested, please refer to FIG. 7 , which is a partial structural diagram of an optical detector according to an embodiment of the present disclosure. As shown in FIG. 7, the optical detector 2500 in the present embodiment includes at least a light source 2510, an optical detecting element (or spectrum analyzer) 2520, and a beam splitter 2530. In the test, for example, in the case of the fluorescent excitation test, please together with the 4A picture, the light source 2510 emits blue light having a wavelength of 450 nm, is emitted through the first optical path P1, and then the blue light is transmitted through the optical path adjuster 2400. The light is incident on the optical fiber 2310, and then the blue light is absorbed by the object to be tested in the detecting groove 2110. The object to be tested then emits a yellow-green light with a wavelength of 520 nm. This yellow-green light also enters the optical path chamber 2200 via the optical fiber 2310 and is reflected by the mirror 2430 in the optical path adjuster 2400 to be received by the optical detector 2500. When the received light is incident on the beam splitter 2530, it is reflected and enters the optical detecting element 2520 along the second optical path P2. In this embodiment, the optical detector 2500 has both the function of exciting the light source and the spectral analysis by the foregoing structure or other structures having the same or similar effects.

That is, one or more implementations in accordance with the present disclosure For example, an optical detecting device having a light path adjuster is disclosed. According to an embodiment of the present disclosure, an optical detecting device can detect a plurality of objects to be tested by only one optical detector. And the position of the side object and the optical detector are fixed. The optical path adjuster disclosed in the present disclosure establishes a plurality of optical paths between the fixed optical detector and the plurality of objects to be tested by the unequal rotation (or non-equal rotation) of the grating disk and the mirror. .

Although the disclosure has been disclosed above in the foregoing embodiments, it is not Used to define the disclosure. All changes and refinements are beyond the scope of this disclosure. Please refer to the attached patent application for the scope of protection defined by this disclosure.

2400‧‧‧Light path adjuster

2410‧‧‧Base

2420‧‧‧ raster disk

2430‧‧‧Mirror

2440‧‧‧Rotary drive module

2441, 2443~2445‧‧‧ gears

2442‧‧‧Belt

2446‧‧‧Drive shaft

2450‧‧‧Rotary axis

Claims (15)

An optical path adjuster comprising: a pedestal; a grating disk comprising: an annular sidewall; and a first optical channel extending through the annular sidewall; a mirror; and a rotary driving module coupled to the a pedestal connected to the grating disk and the mirror respectively for driving the grating disk to rotate at a first rotation amount, and driving the mirror to rotate by a second rotation amount; wherein the grating disk and the mirror Rotate coaxially. The optical path adjuster of claim 1, wherein a ratio of the first amount of rotation to the second amount of rotation is a fixed value. The optical path adjuster of claim 1, wherein the base is provided with a detecting hole. The optical path adjuster of claim 3, wherein the upper edge of the mirror has a first mirror height compared to the bottom surface of the base, and the lower edge of the mirror has a lower edge than the bottom surface of the base a second mirror height, the shape center of the detecting hole has a detecting hole height compared to the bottom surface of the base, and the shape center of the first light channel has a light channel height compared to the bottom surface of the base, The average height of the detection aperture and the height of the optical channel are between the height of the first mirror and the height of the second mirror. The optical path adjuster of claim 4, wherein the height of the detecting hole is different from the height of the optical path. The optical path adjuster of claim 4, wherein the height of the detecting hole is the same as the height of the optical path, and the grating disk further comprises: a plurality of second optical channels, each of the second optical channels extending through the annular side wall The shape center of each of the second light channels has the light channel height compared to the bottom surface of the base. The optical path adjuster of claim 6, wherein the second optical channels are equidistantly distributed over a portion of the annular side wall. The optical path adjuster of claim 7, wherein a minimum distance between the first optical channel and the second optical channels is smaller than a distance between the second optical channels. An optical detecting device comprising: a plurality of detecting grooves for placing an object to be tested; a light path chamber comprising: a circular side wall; and a plurality of fiber holders, equidistantly distributed on the side wall of the optical path chamber; An optical fiber, one end of each of the optical fibers is fixed to one of the fiber holders, and the other end is connected to one of the detection slots; a light path adjuster is fixed to the optical path chamber, and includes: a base; The base is provided with a detecting hole; a grating plate comprising: An annular sidewall; and a first optical channel extending through the annular sidewall; a mirror; and a rotary driving module coupled to the base and coupled to the grating disk and the mirror for driving The grating disk rotates by a first amount of rotation and drives the mirror to rotate by a second amount of rotation; wherein the grating disk rotates coaxially with the mirror, and the first optical channel is aligned with the optical fibers And an optical detector fixed to the optical path chamber and receiving light through the detection hole. The optical path adjuster of claim 9, wherein a ratio of the first amount of rotation to the second amount of rotation is a fixed value. The optical path adjuster of claim 9, wherein the upper edge of the mirror has a first mirror height compared to the bottom surface of the base, and the lower edge of the mirror has a lower edge than the bottom surface of the base a second mirror height, the shape center of the detecting hole has a detecting hole height compared to the bottom surface of the base, and the shape center of the first light channel has a light channel height compared to the bottom surface of the base, The average height of the detection aperture and the height of the optical channel are between the height of the first mirror and the height of the second mirror. The optical path adjuster of claim 11, wherein the height of the detecting hole is different from the height of the optical path. The light path adjuster of claim 11, wherein the height of the detecting hole is the same as the height of the light channel, and the grating disk further comprises: a plurality of second light channels, wherein the second light channels penetrate the annular side wall The shape center of each of the second light channels has the light channel height compared to the bottom surface of the base. The optical path adjuster of claim 13, wherein the second optical channels are equidistantly distributed over a portion of the annular side wall. The optical path adjuster of claim 14, wherein a minimum distance between the first optical channel and the second optical channels is smaller than a distance between the second optical channels.