CN117850052A - Multi-optical path selection system - Google Patents
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- CN117850052A CN117850052A CN202311662874.9A CN202311662874A CN117850052A CN 117850052 A CN117850052 A CN 117850052A CN 202311662874 A CN202311662874 A CN 202311662874A CN 117850052 A CN117850052 A CN 117850052A
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- 230000005540 biological transmission Effects 0.000 claims abstract description 51
- 238000001514 detection method Methods 0.000 claims abstract description 28
- 230000003287 optical effect Effects 0.000 claims description 78
- 239000004973 liquid crystal related substance Substances 0.000 claims description 51
- 230000000903 blocking effect Effects 0.000 claims 1
- 238000002474 experimental method Methods 0.000 abstract description 16
- 238000011160 research Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 238000003384 imaging method Methods 0.000 description 4
- 230000006978 adaptation Effects 0.000 description 3
- 230000010287 polarization Effects 0.000 description 3
- 241001270131 Agaricus moelleri Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- 238000005516 engineering process Methods 0.000 description 1
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- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 238000012576 optical tweezer Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
- G02B27/0938—Using specific optical elements
- G02B27/095—Refractive optical elements
- G02B27/0955—Lenses
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
- G02B27/0933—Systems for active beam shaping by rapid movement of an element
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/28—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising
- G02B27/283—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising used for beam splitting or combining
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/28—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising
- G02B27/286—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising for controlling or changing the state of polarisation, e.g. transforming one polarisation state into another
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Abstract
The utility model provides a multi-optical-path selection system, including installing light beam generation module, light path selection module, light path transmission module and the detection module on the fixed module of light path, light beam generation module is used for adjusting the collimation light beam facula diameter and with the light beam at collimation light beam, divergent light beam or assemble the light beam and switch between, then match suitable light path through light path selection module, again transmit to the detection module through light path transmission module, in order to satisfy different application occasions, thereby solve and use the light path that the current light path system is because the target surface is different, the study content is different or do the experiment is different to lead to repeatedly build, a plurality of light paths are parallel builds, the light beam collimation/diverges/assemble unable switch, the unable problem of adjusting of facula diameter, light path simple structure, extensive adaptability.
Description
Technical Field
The present disclosure relates to the field of optical technologies, and in particular, to a multi-optical path selection system.
Background
The liquid crystal spatial light modulator is a flexible programmable optical device, and different optical elements are configured according to different pictures loaded on the liquid crystal spatial light modulator, so that various basic experiments and deep researches such as projection, pixel measurement, spatial filtering, abbe imaging, calculation holographic, beam shaping, image processing, optical tweezers, microscopic imaging and the like can be carried out. According to the transmission mode of the light path, the liquid crystal spatial light modulator is divided into two types, namely a transmission type liquid crystal spatial light modulator and a reflection type liquid crystal spatial light modulator, and the basic light paths built by the two types of devices are different. According to different modulation types, the liquid crystal spatial light modulator is divided into an amplitude type spatial light modulator and a phase type spatial light modulator, and the required polarization angle and the required polarization detection angle of the two types of devices are different. The target surface of the liquid crystal spatial light modulator is different, and the spot diameter required for the study related to the target surface is also different. The optical paths used for experiments and researches based on the liquid crystal spatial light modulator are complicated, optical elements are scattered, repeated construction of the optical paths is often required, or a plurality of optical paths are required to be constructed.
Disclosure of Invention
In view of this, it is necessary to provide a multi-optical path selection system capable of avoiding the problems of repeated construction of optical paths, parallel construction of a plurality of optical paths, incapability of switching beam collimation/divergence/convergence, and incapability of adjusting spot diameters, in view of the defects existing in the prior art.
In order to solve the problems, the following technical scheme is adopted in the application:
the application provides a many light paths selection system, including installing light beam generation module, light path selection module, light path transmission module and the detection module on the fixed module of light path, wherein:
the light beam generation module is used for providing a light beam and switching the light beam among a collimated light beam, a divergent light beam or a convergent light beam;
the light path selection module is used for receiving the light beam and comprises a polarizer, a beam splitting prism, a diaphragm, a reflecting mirror, a second analyzer, a liquid crystal spatial light modulator and a first analyzer which are sequentially arranged along the optical axis of the light beam;
the optical path transmission module comprises a transmission optical path transmission component and a reflection optical path transmission component, wherein the transmission optical path transmission component is used for acquiring the light beam modulated by the first analyzer, and the reflection optical path transmission component is used for acquiring the light beam modulated by the second analyzer;
the detection module comprises a first detection unit and a second detection unit, wherein the first detection unit is used for detecting the light beam passing through the transmission type light path transmission component, and the second detection unit is used for detecting the light beam passing through the reflection type light path transmission component.
In some embodiments, the light beam generating module light beam includes a light source, and an objective lens, a pinhole filter, a first lens, and a second lens sequentially disposed along an optical path of the light beam emitted from the light source.
In some of these embodiments, the positions of the first lens and the second lens may be moved back and forth.
In some embodiments, the optical path selection module further comprises a reserving component, wherein the reserving component is arranged between the polarizer and the beam splitting prism, and the reserving component comprises a grid, a lens, a filter, a half-wave plate or a 1/4 wave plate.
In some embodiments, the aperture is used to select the optical path, and the aperture is opened and closed as required, so as to block the light beam or make the light pass through.
In some of these embodiments, the reflective optical path transmission component comprises a lens or aperture or diaphragm or slit.
In some of these embodiments, the transmissive optical path transfer assembly includes a lens or aperture or diaphragm or slit.
In some of these embodiments, the detection module comprises a power meter or a CCD or a viewing screen or a color chart.
In some of these embodiments, the optical path fixation module includes an optical element mount including a cage-based optical element mount and a separate optical element mount.
By adopting the technical scheme, the application has the following beneficial effects:
the utility model provides a many light paths selection system, including installing light beam generation module, light path selection module, light path transmission module and the detection module on the fixed module of light path, light beam generation module is used for according to the experiment of difference, research content and the liquid crystal spatial light modulator of the different target surfaces of adaptation adjust collimation light beam facula diameter and with the light beam switch between collimation light beam, divergent light beam or convergent light beam, then use transmission type or reflective liquid crystal spatial light modulator as required through light path selection module collocation suitable light path, according to the modulation type adjustment polarizer of research content and used spatial light modulator and the angle of first second analyzer. And then the light path is transmitted to the detection module through the light path transmission module so as to meet different application occasions, thereby solving the problems that the light paths are repeatedly built, a plurality of light paths are parallelly built, the light beam collimation/divergence/convergence cannot be switched and the light spot diameter cannot be adjusted due to different target surfaces, different research contents or different experiments in the existing light path system, and the light path has simple structure and wide adaptability.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings used in the embodiments of the present application or the description of the prior art will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a multi-optical path selection system provided in the present application.
Fig. 2 is a schematic optical path diagram of the multi-optical path selection system provided in the present application.
Fig. 3 is a schematic view of the optical path of the projection experiment provided in embodiment 1 of the present application.
Fig. 4 is a schematic optical path diagram of a filter experiment provided in embodiment 2 of the present application.
Fig. 5 is a schematic optical path diagram of a michelson interference experiment provided in example 3 of the present application.
Detailed Description
Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and intended for the purpose of explaining the present application and are not to be construed as limiting the present application.
In the description of the present application, it should be understood that the terms "upper," "lower," "horizontal," "inner," "outer," and the like indicate an orientation or a positional relationship based on that shown in the drawings, and are merely for convenience of description and simplification of the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings and examples.
Referring to fig. 1, a schematic structural diagram of a multi-optical path selecting system according to the present embodiment includes a beam generating module 110, an optical path selecting module 120, an optical path transmitting module 130 and a detecting module 140 mounted on an optical path fixing module 10, and the specific structures of the respective components are described in detail below.
The beam generating module 110 is configured to provide a beam and switch the beam between a collimated beam, a divergent beam, or a convergent beam.
Referring to fig. 2, the light beam generating module 110 provided in an embodiment of the present application includes a light source 111, and an objective lens 112, a pinhole filter 113, a first lens 114, and a second lens 115 sequentially disposed along an optical path of a light beam emitted from the light source 111.
The positions of the first lens 114 and the second lens 115 can be moved back and forth.
It will be appreciated that the beam generation module 110 is configured to adjust the beam spot diameter of the collimated beam and switch the beam between the collimated beam, the diverging beam, or the converging beam according to different experiments, study contents, and liquid crystal spatial light modulators adapted to different target surfaces, so as to meet different scene requirements.
Referring to fig. 2, the optical path selecting module 120 is configured to receive the light beam emitted from the light beam generating module 110, and the optical path selecting module 120 includes a polarizer 121, a beam splitting prism 122, a diaphragm 123, a mirror 124, a second analyzer 125, a liquid crystal spatial light modulator 126, and a first analyzer 127, which are sequentially disposed along an optical axis of the light beam.
Specifically, the polarizer 121 is configured to receive the light beam emitted from the light beam generating module 110, and form polarized light of the obtained light beam according to a desired polarization direction.
Further, the optical path selecting module 120 further includes a reserving component 128, the reserving component 128 is disposed between the polarizer 121 and the beam splitter prism 122, and the reserving component 128 includes a grid, a lens, a filter, a half-wave plate, or a 1/4 wave plate.
Further, the beam splitter prism 122 is used for splitting the incident linearly polarized light to better meet the scene requirement.
Further, the aperture 123 is configured to select an optical path, and to select opening and closing of the aperture according to needs, so as to block or reflect incident light.
Further, a transmissive or reflective liquid crystal spatial light modulator 126 is mounted behind the dichroic prism 122 to generate the desired intensity and phase light field.
Further, the first analyzer 127 is configured to adapt the transmissive liquid crystal spatial light modulator 126, and is used with the polarizer 121 to place the liquid crystal spatial light modulator 126 in an amplitude or phase operation mode.
Further, the second analyzer 125 is configured to adapt the reflective liquid crystal spatial light modulator 126, and is used with the polarizer 121 to place the liquid crystal spatial light modulator 126 in an amplitude or phase operation mode.
The optical path transmission module 130 includes a transmissive optical path transmission component 131 and a reflective optical path transmission component 132, where the transmissive optical path transmission component 131 is configured to obtain the light beam modulated by the first analyzer 127, and the reflective optical path transmission component 132 is configured to obtain the light beam modulated by the second analyzer 125.
Specifically, the transmissive optical path transmission component 131 is used to adapt to the transmissive liquid crystal spatial light modulator, and includes lenses, apertures, diaphragms, slits, imaging systems, and other common optical elements.
Further, the reflective optical path transmission component 132 is used to adapt to the reflective liquid crystal spatial light modulator, and includes lenses, apertures, diaphragms, slits, imaging systems, and other common optical elements.
The detection module 140 includes a first detection unit 141 for detecting the light beam passing through the transmission type optical path transmission assembly 131, and a second detection unit 142 for detecting the light beam passing through the reflection type optical path transmission assembly 132.
Specifically, the detection module 140 includes a power meter or a CCD or a viewing screen or a color chart for image and energy collection.
Specifically, the optical path fixing module 10 includes an optical element fixing frame, and the optical element fixing frame includes a cage-based optical element fixing frame and a separate optical element fixing frame.
The utility model provides a many light paths selection system, including installing light beam generation module, light path selection module, light path transmission module and the detection module on the fixed module of light path, light beam generation module is arranged in according to the experiment of difference, research content and the liquid crystal spatial light modulator of the different target surfaces of adaptation adjust collimation light beam facula diameter and with the light beam switch between collimation light beam, divergent light beam, or convergent light beam, then through the different liquid crystal spatial light modulator of light path selection module adaptation, match suitable light path, again transmit to the detection module through light path transmission module, in order to satisfy different application occasions, thereby solve the light path repetition that leads to because the target surface is different in the light path system of using current liquid crystal spatial light modulator, the parallel construction of a plurality of light paths, the light beam collimation/diverges/gathers unable switching, the unable problem of adjusting of facula diameter, light path simple structure, extensive adaptability.
The multi-optical path selection system provided by the application can realize a light spot diameter/convergence/divergence light adjusting optical path, a transmission type light beam modulating optical path, a reflection type light beam modulating optical path and a reflection type light beam modulating interference optical path according to different application scenes, and the technical scheme is described in detail below with reference to specific embodiments.
Example 1
Referring to fig. 2 and 3, a projection experiment is completed for the optical path combination provided in embodiment 1 of the present application.
In this embodiment, the projection experiment includes a light source 111, and an objective 112, a pinhole filter 113, a first lens 114, a second lens 115, a polarizer 121, a dichroic prism 122, a diaphragm 123, a reflecting mirror 124, a liquid crystal spatial light modulator 126 (transmissive liquid crystal spatial light modulator), a first analyzer 127, a third lens 211, a pinhole diaphragm 212, a fourth lens 213, and a CCD sequentially arranged along the light path of the light beam emitted from the light source 111, where the liquid crystal spatial light modulator 126 is controlled by a computer 214.
It can be understood that in the present embodiment, the third lens 211, the aperture stop 212 and the fourth lens 213 form the transmission optical path transmission component 131.
In this embodiment, the light source 111 is a laser light source, and the reserving component 128 is omitted (i.e. no optical element is required to be installed in the reserving component 128), and the diaphragm 123 is closed; the third lens 211 and the fourth lens 213 with equal focal lengths are arranged in the transmission type optical path transmission component 131, and an aperture diaphragm 212 is arranged on the back focal plane of the third lens 211 and the front focal plane of the fourth lens 213; the first detection module 141 is used for collecting images by using CCD and is arranged on the back focal plane of the fourth lens 213; adjusting the positions of the first lens 114 and the second lens 115 such that the beam generating module generates a collimated beam that is smaller than the target surface of the liquid crystal spatial light modulator 126; the light source 111 is turned on, the power line and the video line of the liquid crystal spatial light modulator 126 are connected, the power supply is turned on to enable the liquid crystal spatial light modulator 126 to work normally, the polarizer 121 and the first analyzer 127 are adjusted to enable the liquid crystal spatial light modulator 126 to work in an amplitude mode, 8-bit images or videos to be projected are loaded into the liquid crystal spatial light modulator 126 through the computer 214, and clear projection pictures can be observed in CCD acquisition software.
Example 2
Referring to fig. 2 and fig. 4, a filter experiment is completed for the optical path combination provided in embodiment 2 of the present application.
In this embodiment, the filter experiment includes a light source 111, and an objective lens 112, a pinhole filter 113, a first lens 114, a second lens 115, a polarizer 121, a beam splitter prism 122, a second analyzer 125, a fifth lens 311, a CCD, a liquid crystal spatial light modulator 126 (reflective liquid crystal spatial light modulator) and a computer connected to the liquid crystal spatial light modulator 126, which are sequentially arranged along the light path of the light beam emitted from the light source 111. It is understood that in the present embodiment, the fifth lens 311 constitutes the reflective optical path transmission member 131.
In this embodiment, the light source 111 is a laser light source, and the positions of the first lens 114 and the second lens 115 are adjusted so that the light beam generating module generates a converging light beam and focuses the converging light beam on the target surface of the liquid crystal spatial light modulator 126; at this time, a 10lp/mm grid element is installed in the reserved assembly, a diaphragm is closed, a liquid crystal spatial light modulator 126 is installed, a fifth lens 311 is installed in the reflective optical path transmission assembly, a CCD is selected as a first detection module 141, and a filtered pattern is collected behind the fifth lens 311; the light source 111 is turned on, the power line and the video line of the liquid crystal spatial light modulator 126 are connected, the power supply is turned on to enable the liquid crystal spatial light modulator 126 to work normally, the polarizer 121 and the second analyzer 125 are adjusted to enable the liquid crystal spatial light modulator to work in an amplitude mode, small holes, slits, annular diaphragms and the like are loaded into the liquid crystal spatial light modulator 126 through a computer, and the low-pass, high-pass and slit filtered results can be observed in CCD acquisition software.
Example 3
Referring to fig. 2 and 5, a michelson interference experiment is completed for the optical path combination provided in embodiment 3 of the present application.
In this embodiment, the michelson interference experiment includes a light source 111, and an objective lens 112, a pinhole filter 113, a first lens 114, a second lens 115, a polarizer 121, a dichroic prism 122, a diaphragm 123, a reflecting mirror 124, a second analyzer 125, an observation screen 411, and a liquid crystal spatial light modulator 126 (reflective liquid crystal spatial light modulator) sequentially arranged along the light path of the light beam emitted from the light source 111 according to the above light path structural design. The lc spatial light modulator 126 is controlled by a computer 214.
In this embodiment, the light source 111 is a laser light source, and the positions of the first lens 114 and the second lens 115 are adjusted so that the light beam generating module generates a collimated light beam slightly smaller than the target surface of the liquid crystal spatial light modulator 126; at this time, no optical element is required to be installed in the reserved assembly, the diaphragm 123 is opened, the liquid crystal spatial light modulator 126 is installed, no optical element is required to be installed in the reflective optical path transmission assembly, and the first detection unit 141 selects an observation screen; the power supply of the laser 111 is started, the power line and the video line of the liquid crystal spatial light modulator 126 are connected, the power supply is started to enable the liquid crystal spatial light modulator 126 to work normally, the polarizer 121 and the second analyzer 125 are regulated to enable the liquid crystal spatial light modulator to work in a phase mode, a contrast image with different gray scales on the left and right is loaded into the liquid crystal spatial light modulator 126 through a computer, interference fringes between light and shade, reflected by the reflecting mirror 124 and reflected by the liquid crystal spatial light modulator 126, are observed on the observation screen 411, one side of the contrast image keeps the gray scale 0 unchanged, the gray scale on the other side is gradually changed from 0 to 255, and one side of the interference fringes can be observed to move in the gray scale changing process; the amount of phase modulation of the liquid crystal spatial light modulator 126 can also be quantitatively analyzed based on the position of one side interference fringe shift.
It will be understood that the technical features of the above-described embodiments may be combined in any manner, and that all possible combinations of the technical features in the above-described embodiments are not described for brevity, however, they should be considered as being within the scope of the description provided in the present specification, as long as there is no contradiction between the combinations of the technical features.
The foregoing description of the preferred embodiments of the present application has been provided for the purpose of illustrating the general principles of the present application and is not meant to limit the scope of the present application in any way. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application, and other embodiments of the present application, which may occur to those skilled in the art without the exercise of inventive faculty, are intended to be included within the scope of the present application, based on the teachings herein.
Claims (9)
1. The utility model provides a many light paths selection system which characterized in that, including install light beam generation module, light path selection module, light path transmission module and the detection module on the fixed module of light path, wherein:
the light beam generation module is used for providing a light beam and switching the light beam among a collimated light beam, a divergent light beam or a convergent light beam;
the light path selection module is used for receiving the light beam and comprises a polarizer, a beam splitting prism, a diaphragm, a reflecting mirror, a second analyzer, a liquid crystal spatial light modulator and a first analyzer which are sequentially arranged along the optical axis of the light beam;
the optical path transmission module comprises a transmission optical path transmission component and a reflection optical path transmission component, wherein the transmission optical path transmission component is used for acquiring the light beam modulated by the first analyzer, and the reflection optical path transmission component is used for acquiring the light beam modulated by the second analyzer;
the detection module comprises a first detection unit and a second detection unit, wherein the first detection unit is used for detecting the light beam passing through the transmission type light path transmission component, and the second detection unit is used for detecting the light beam passing through the reflection type light path transmission component.
2. The multiple light path selection system of claim 1, wherein the light beam generation module comprises a light source, and an objective lens, a pinhole filter, a first lens, and a second lens disposed in that order along the light path of the light beam emitted by the light source.
3. The multiple optical path selection system of claim 2, wherein the positions of the first lens and the second lens are movable back and forth.
4. The multiple beam path selection system of claim 1, wherein the beam path selection module further comprises a reserving component disposed between the polarizer and the beam splitting prism, the reserving component comprising a grid or lens or filter or half-wave plate or 1/4 wave plate.
5. The multiple light path selection system of claim 1, wherein the aperture is configured to select the light path, and to select the aperture to open and close as needed, thereby blocking or passing the light beam.
6. The multiple light path selection system of claim 1, wherein the reflective light path transmission component comprises a lens or aperture or diaphragm or slit.
7. The multiple light path selection system of claim 1, wherein the transmissive light path transport assembly comprises a lens or aperture or diaphragm or slit.
8. The multiple light path selection system of claim 1, wherein the detection module comprises a power meter or a CCD or a viewing screen or a color chart.
9. The multiple light path selection system of claim 1, wherein the light path fixation module comprises an optical element mount comprising a cage-based optical element mount and a separate optical element mount.
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| CN202311662874.9A CN117850052A (en) | 2023-12-06 | 2023-12-06 | Multi-optical path selection system |
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| CN202311662874.9A CN117850052A (en) | 2023-12-06 | 2023-12-06 | Multi-optical path selection system |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101556386A (en) * | 2009-05-15 | 2009-10-14 | 哈尔滨理工大学 | Interference type double-imaging measurement device for multi-parameters of liquid crystal spatial light modulator |
| CN103745637A (en) * | 2014-01-20 | 2014-04-23 | 上海瑞立柯信息技术有限公司 | Digital photoelectric experiment device and teaching method thereof |
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- 2023-12-06 CN CN202311662874.9A patent/CN117850052A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101556386A (en) * | 2009-05-15 | 2009-10-14 | 哈尔滨理工大学 | Interference type double-imaging measurement device for multi-parameters of liquid crystal spatial light modulator |
| CN103745637A (en) * | 2014-01-20 | 2014-04-23 | 上海瑞立柯信息技术有限公司 | Digital photoelectric experiment device and teaching method thereof |
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