CN115032853A - Hyperspectral projector and use method - Google Patents

Hyperspectral projector and use method Download PDF

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Publication number
CN115032853A
CN115032853A CN202210629549.1A CN202210629549A CN115032853A CN 115032853 A CN115032853 A CN 115032853A CN 202210629549 A CN202210629549 A CN 202210629549A CN 115032853 A CN115032853 A CN 115032853A
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light
grating
spectrum
hyperspectral
projection
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CN202210629549.1A
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CN115032853B (en
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常军
田江宇
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Beijing Institute of Technology BIT
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Beijing Institute of Technology BIT
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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/206—Control of light source other than position or intensity
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/208—Homogenising, shaping of the illumination light
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3141—Constructional details thereof
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3141—Constructional details thereof
    • H04N9/315—Modulator illumination systems
    • H04N9/3158—Modulator illumination systems for controlling the spectrum
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Mechanical Light Control Or Optical Switches (AREA)

Abstract

The invention discloses a hyperspectral projector and a use method thereof, wherein the hyperspectral projector comprises the following components: the full-spectrum LED light source (1) generates continuous spectrum light; the collimating mirror (2) and the beam shaping mirror (3) shape light of a continuous spectrum band, and the light guide pipe (4) conducts the projection light source to the fast reflection grating module (5); the fast reflection grating module (5) comprises a light splitting grating (5-1) and a fast reflector driving device (5-2), the light splitting grating (5-1) is used for uniformly splitting the full-spectrum light of the projection light source, and the fast reflector driving module (5-2) is used for controlling the swinging frequency and the swinging speed of the light splitting grating (5-1); the digital micromirror (6) obtains continuous spectrum light.

Description

Hyperspectral projector and use method
Technical Field
The invention relates to the technical field of projectors, in particular to a hyperspectral projector and a using method thereof.
Background
The color gamut reduction means realized by the existing projector is generally based on color reduction of RGB three channels, can only simulate the chromaticity information of a real scene, and cannot reduce the spectral information of the real scene. In order to solve the problem that the semi-physical simulation system projects the simulation scene at the present stage, the development of various projection devices mainly focuses on enhancing color gamut reduction and enhancing contrast of the projection scene, but at present, the projection devices rarely can realize the spectral information of the reduction scene.
Disclosure of Invention
In view of this, the invention provides a hyperspectral projector and a use method thereof, which can solve the technical problem of hyperspectral information projection of the projector in a visible light band.
In order to solve the above-mentioned technical problems, the present invention has been accomplished as described above.
A hyperspectral projector comprising:
the system comprises a full-spectrum LED light source, a collimating mirror, a beam shaping mirror, a light guide pipe, a fast reflection grating module, a digital micromirror and a projection lens.
The full-spectrum LED light source generates continuous spectrum light;
the collimating lens is arranged perpendicular to the optical axis and used for collecting the continuous spectrum light in the vertical direction;
the beam shaping mirror is an aspheric cylindrical mirror and is arranged perpendicular to the optical axis, and the collected continuous spectrum light is shaped in the perpendicular direction to obtain a projection light source with a strip-shaped section;
the light guide pipe is arranged in the optical axis, is positioned at the focal length of the whole beam mirror, and collects and transmits the projection light source to the quick reflection grating module;
the fast reflection grating module comprises a light splitting grating and a fast reflector driving device, the light splitting grating is used for uniformly splitting the full-spectrum light of the projection light source, and the fast reflector driving module is used for controlling the swing frequency and the swing speed of the light splitting grating;
the digital micro-mirror is used for receiving the spectral spectrum emitted by the spectral grating, and the spectral spectrum of each time interval is subjected to light intensity modulation based on the opening and closing of the digital micro-mirror 6 to obtain continuous spectrum light;
the projection lens is used for projecting the continuous spectrum light to a projection surface.
Preferably, the mechanical scanning component of the spectral grating is controlled by the controller to obtain the swing frequency, swing angular velocity and swing range specified by the controller, and the mirror is driven according to the parameters specified by the controller; after the processing of the light splitting grating, the processed projection light sources output by the light splitting grating are arranged in a two-dimensional space, the light splitting grating is transversely arranged to correspond to each light splitting sub-spectrum section, and the light sources which are longitudinally arranged to correspond to the same spectrum section are linearly expanded as the input projection light sources with strip-shaped sections.
Preferably, each uniform spectrum segment separated by the spectral grating can uniformly cover a central irradiation area in a set period, and the central irradiation area is a DMD array of a back focal plane of the spectral grating (5-1).
Preferably, when the digital micromirror receives a light splitting source output by the light splitting grating, each row of pixels corresponds to one sub-spectrum segment, each row of pixels receives light of different spectrum segments at the same moment, and when the digital micromirror performs projection, each micromirror corresponds to one projection pixel.
Preferably, the digital micromirror is configured to pixel-gate the two-dimensionally arranged multi-spectral-segment light source as required, so as to realize spectral time modulation.
A method for using a hyperspectral projector, which uses the hyperspectral projector as described above, the method comprising the following steps:
step S1: acquiring a strip-shaped full-spectrum light source output by a full-spectrum light source;
step S2: calibrating the drive of the quick reflector, wherein the calibrated content comprises a rotation angle and a frequency, the calibration principle is to minimize the loss of the output energy output by the spectral grating to the digital micromirror, and the swing angle of the spectral grating enables each sub-spectrum light output by the spectral grating to be projected onto each micromirror of the digital micromirror;
step S3: calibrating a circuit control system of the quick reflector driver and the digital micromirror, wherein the calibrated content comprises a working time sequence between the quick reflector driver and the digital micromirror and a working state of the circuit control system of the digital micromirror, and the calibration principle is that the quick reflector driver and the digital micromirror work at the same time sequence and no color shift phenomenon exists when the full-picture outputs a specific spectral band;
step S4: and modulating and projecting the hyperspectral light source output by the spectral grating, and obtaining light with different spectral bands at each micromirror of the digital micromirror so as to obtain a required hyperspectral image.
Has the beneficial effects that:
the invention develops a fast reflection grating module, which is characterized in that a reflection grating is added on a driving device of a fast reflector to realize the functions of spectrum decomposition and spectrum space modulation, and a hyperspectral projector integrated with the reflection grating module can adopt a mechanical scanning mode to enable the hyperspectral projector to get rid of the frame rate limitation of a programmable light source under the condition of ensuring the frame rate of projection, thereby obtaining a hyperspectral projection image with an extremely high frame rate.
The method has the following technical effects:
(1) the invention can realize the hyperspectral projection of a visible light wave band of 380nm-840nm and theoretically realize the full color gamut projection.
(2) All devices can be assembled on a prototype by using goods shelf products, and the device is simple in structure and low in cost.
(3) The hyperspectral projector can project a hyperspectral image with a higher frame rate, and the frame rate of the hyperspectral projector is higher than that of the existing hyperspectral projector based on a programmable light source and can reach more than 5 times of the frame rate of the existing hyperspectral projector.
Drawings
FIG. 1 is a schematic view of a hyperspectral projector provided by the present invention;
FIG. 2 is a schematic structural diagram of a fast reflective grating module according to the present invention;
FIG. 3 is a schematic diagram of a modulation band of a hyperspectral projector according to the present invention;
FIG. 4 is a schematic diagram of a modulation band of another hyperspectral projector according to the present invention.
Reference numerals:
1: full spectrum LED light source, 2: collimator lens, 3: beam shaping mirror, 4: light pipe, 5: fast reflection grating module, 6: digital micromirror, 7: projection lens, 5-1: spectroscopic grating, 5-2: a fast mirror driving apparatus.
Detailed Description
The invention is described in detail below with reference to the figures and examples.
As shown in fig. 1-2, the present invention provides a hyperspectral projector, including:
the system comprises a full-spectrum LED light source 1, a collimating mirror 2, a beam shaping mirror 3, a light pipe 4, a fast reflection grating module 5, a digital micro-mirror 6 and a projection lens 7.
The full-spectrum LED light source 1 generates continuous spectrum light;
the collimating lens 2 is arranged perpendicular to the optical axis and used for collecting the continuous spectrum light in the vertical direction;
the beam shaping mirror 3 is an aspheric cylindrical mirror and is arranged perpendicular to the optical axis, and the collected continuous spectrum light is shaped in the perpendicular direction to obtain a projection light source with a strip-shaped section;
the light guide pipe 4 is arranged in an optical axis and positioned at the focal length of the whole beam mirror, and is used for collecting and transmitting the projection light source to the fast reflection grating module 5;
the fast reflection grating module 5 comprises a light splitting grating 5-1 and a fast reflector driving device 5-2, the light splitting grating 5-1 is used for uniformly splitting the full-spectrum light of the projection light source, and the fast reflector driving module 5-2 is used for controlling the swinging frequency and the swinging speed of the light splitting grating 5-1;
the digital micromirror 6 is used for receiving the light-splitting spectrum emitted by the light-splitting grating 5-1, and carrying out light intensity modulation on the light-splitting spectrum in each time interval based on the opening and closing of the digital micromirror 6 to obtain continuous spectrum light;
the projection lens 7 is used for projecting the continuous spectrum light to a projection surface.
The collimating lens 2 is an aspheric lens and is arranged perpendicular to an optical axis, and the distance from the collimating lens 2 to the full-spectrum LED is the theoretical focal length of the collimating lens. The beam splitting grating 5-1 and the optical axis form an included angle of 12 degrees; the fast reflector driving module 5-2 realizes the high frequency, high precision and fixed speed swing of the grating through a piezoelectric micro-displacement scanning system and computer control.
Further, the full-spectrum LED light source 1, the collimating mirror 2, the beam shaping mirror 3, the light pipe 4 and the fast reflection grating module 5 are in the same optical axis, the fast reflection grating module 5 deflects the optical axis by 12 degrees to the digital micromirror 6, and the digital micromirror 6 outputs the light to the projection screen through the projection lens 7; wherein full gloss register for easy reference LED light source 1 is located 2 focus departments of collimating mirror, and collimating mirror 2 is close as far as possible with whole beam mirror 3 distance, and the distance is less than first preset threshold promptly, first preset threshold can be set for, and light pipe 4 is located 3 focus departments of whole beam mirror, and digital micromirror 6 takes with the output light of spectral grating 5-1 can cover digital micromirror 6 as the standard with quick reflection grating module 5's distance, and digital micromirror 6 is located projection lens 7's object space focal plane department.
Further, the full-spectrum LED light source 1 generates light in a continuous spectrum of 380nm to 840nm, and since the light generated by the full-spectrum LED light source 1 has a divergence angle, the light generated by the full-spectrum LED light source 1 needs to be collimated and collimated to be used in the system, and therefore, a collimating mirror and a beam shaping mirror need to be provided.
The collimating lens is an aspheric lens, perpendicular to the optical axis is sequentially placed along the optical path, and the full-spectrum light source can be collimated to a certain degree.
The beam shaping mirror is an aspheric cylindrical mirror, is sequentially arranged along a light path and is perpendicular to the optical axis, and can be used for shaping the collected continuous spectrum light in the vertical direction to output a relatively collimated projection light source with a strip-shaped section.
The cross-section of the light guide pipe 4 is strip-shaped, so that light can be conducted, a light condensation effect is achieved, a light source which is collimated and has a strip-shaped cross-section and is subjected to beam shaping by the beam shaping mirror can be collected and conducted, a light homogenizing effect is achieved, and the light source is transmitted to the reflection grating module 5.
The light splitting grating 5-1 is a mechanical scanning grating and has the function of a traditional diffraction grating. The device can transversely split the entering projection light source with a strip-shaped section, and simultaneously, the device can perform high-speed swinging scanning in a certain range of angles at stable frequency and angular speed under the drive of the quick reflector 5-2, so that each uniform spectrum section of grating splitting can uniformly cover a central irradiation area in a stable period. The light splitting grating 5-1 can drive a piezoelectric micro-displacement scanning system of 5-2 through a quick reflector, and the high frequency, high precision and fixed speed swing of the light splitting grating 5-1 are realized through computer control. The output projection light sources are arranged in a two-dimensional space, the horizontal arrangement corresponds to each spectral band of the light splitting molecules, and the longitudinal arrangement corresponds to the linear expansion of the light sources with the same spectral band and the same input light source. The mechanical scanning component can change the projection angle of each horizontal spectral sub-band through horizontal swinging with high precision, so that the mechanical scanning grating can project each strip spectral sub-band to the central irradiation area in turn in a scanning period.
In the embodiment, a mechanical scanning component of the light splitting grating 5-1 is controlled by a controller to obtain the swing frequency, the swing angular speed and the swing range specified by the controller, and the reflector drive 5-2 drives the light splitting grating according to the parameters specified by the controller; after the processing of the spectral grating 5-1, the processed projection light sources output by the spectral grating 5-1 are arranged in a two-dimensional space, the processed projection light sources are transversely arranged corresponding to each spectral sub-band, and the linear expansion of the projection light sources with the same spectral band and the same input cross section is longitudinally arranged corresponding to the linear expansion of the projection light sources with the same band. Each uniform spectrum band divided by the light splitting grating 5-1 can uniformly cover a central irradiation area in a set period, the central irradiation area is a DMD array of a back focal plane of the light splitting grating (5-1), and the period is the reciprocal of frequency.
In this embodiment, the fast mirror driver 5-2 is a driving device of an existing fast mirror on the market, and can implement high-precision regular swing with a frequency of 125Hz (single period of 0.008 second) in a range of-1.5 °, 0 °, +1.5 °, 0 °, -1.5 °, so as to implement uniform coverage of the output light of the beam splitter grating 5-1 to the backward optical system.
In this embodiment, the digital micromirror 6 is a digital micromirror having 1280 × 800 micromirrors with a size of 5.4 μm, and is capable of modulating light intensity of a single micromirror. In use, the light of each sub-spectrum band which is periodically incident can be subjected to intensity modulation along with the swing of the output light splitting light source of the fast reflection grating module 5. When the digital micromirror 6 receives the light splitting source output by the light splitting grating 5-1, each row of pixels corresponds to one sub-spectrum, each row of pixels receives light with different spectrum at the same moment, and when the digital micromirror 6 performs projection, each micromirror corresponds to one projection pixel.
And the projection lens 7 is used for projecting the continuous spectrum light to a projection surface to realize hyperspectral imaging. The projection lens 7 can project the pixels modulated by the digital micro-mirror 6, and the projection lens 7 can adjust the projection focal length thereof according to different projection distances.
Further, the fast reflection grating module 5 is configured to decompose a full spectrum strip light source transmitted by the light guide tube, decompose 380nm-840nm full spectrum segment light into a predetermined plane transverse to a light beam light path, and perform spectral spatial modulation with a natural frequency of 500Hz at-1.5 ° to 1.5 ° with a period of (0.008s) swing.
Further, the digital micromirror 6 is configured to perform pixel gating on the two-dimensionally arranged multi-spectral-segment light source as required, so as to realize spectral time modulation.
Further, the projection lens 7 is configured to project the hyperspectral image onto a preset projection screen.
The invention provides a use method of a hyperspectral projector, which uses the hyperspectral projector and comprises the following steps:
step S1: acquiring a strip-shaped full-spectrum light source output by a full-spectrum light source;
step S2: calibrating the fast reflector driver 5-2, wherein the calibration content comprises a rotation angle and a frequency, the calibration principle is that the loss of the output energy output from the light splitting grating 5-1 to the digital micromirror 6 is minimized, and the swing angle of the light splitting grating 5-1 enables each sub-spectrum light output from the light splitting grating 5-1 to be projected onto each micromirror of the digital micromirror 6;
step S3: calibrating the circuit control systems of the fast reflector driver 5-2 and the digital micromirror 6, wherein the calibrated content comprises the working time sequence between the fast reflector driver 5-2 and the digital micromirror 6 and the working state of the circuit control system of the digital micromirror 6, and the calibration principle is that the fast reflector driver 5-2 and the digital micromirror 6 work at the same time sequence and have no color shift phenomenon when the full picture outputs specific spectral band light;
step S4: and modulating and projecting the hyperspectral light source output by the spectral grating 5-1, obtaining light with different spectral bands on each micro mirror of the digital micro mirror 6, and further obtaining a required hyperspectral image.
In this embodiment, the whole-beam lens collimates and completes a whole beam of the full-spectrum LED light source, outputs continuous spectrum light, and is further condensed and transmitted by the light guide tube, so that the light output to the grating light source is line-mounted full-spectrum quasi-parallel light;
the drive of the fast reflector needs to be calibrated before formal projection, so that the grating swing angle can ensure that each sub-spectrum light can be projected onto each micromirror of the fast reflector under the condition of not losing output energy as much as possible. The digital micromirror can be controlled to drive the fast reflector to open and close at the same period and different delays, so that each single spectral band can be projected, the initial wavelength and the final wavelength (380nm and 840nm) and the central wavelength are mainly calibrated, and the grating schematic diagram conditions during the calibration of the initial wavelength and the final wavelength are given in fig. 3 and fig. 4. After the calibration is finished, the digital micromirror can be controlled by the background system to rapidly modulate the intensity of each wave band, and continuous hyperspectral images are output.
The above embodiments only describe the design principle of the present invention, and the shapes and names of the components in the description may be different without limitation. Therefore, a person skilled in the art of the present invention can modify or substitute the technical solutions described in the foregoing embodiments; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims (6)

1. A hyperspectral projector, comprising:
the system comprises a full-spectrum LED light source (1), a collimating mirror (2), a beam shaping mirror (3), a light pipe (4), a fast reflection grating module (5), a digital micromirror (6) and a projection lens (7);
the full spectrum LED light source (1) generates continuous spectrum light;
the collimating lens (2) is arranged perpendicular to an optical axis and used for collecting the continuous spectrum light in the vertical direction;
the beam shaping mirror (3) is arranged perpendicular to the optical axis to carry out beam shaping in the vertical direction to obtain a projection light source with a strip-shaped section;
the light guide pipe (4) is placed in an optical axis, is positioned at the focal length of the whole beam mirror, and collects and conducts the projection light source to the fast reflection grating module (5);
the fast reflection grating module (5) comprises a light splitting grating (5-1) and a fast reflector driving device (5-2), the light splitting grating (5-1) is used for uniformly splitting the full-spectrum light of the projection light source, and the fast reflector driving module (5-2) is used for controlling the swinging frequency and the swinging speed of the light splitting grating (5-1);
the digital micromirror (6) is used for receiving the spectral spectrum emitted by the spectral grating (5-1), and the spectral spectrum in each time interval is subjected to light intensity modulation based on the opening and closing of the digital micromirror (6) to obtain continuous spectrum light;
the projection lens (7) projects the continuous spectrum band light to a projection surface.
2. The hyperspectral projector according to claim 1, characterized in that the mechanical scanning component of the spectral grating (5-1) is controlled by a controller, and the swing frequency, the swing angular velocity and the swing range specified by the controller are obtained and are driven by the mirror driver (5-2) according to the parameters specified by the controller; after the processing of the light splitting grating (5-1), the processed projection light sources output by the light splitting grating (5-1) are arranged in a two-dimensional space, the light splitting grating is transversely arranged and corresponds to each light splitting sub-spectrum, and the light sources which are longitudinally arranged and correspond to the same spectrum and the linear expansion which is the same as the input projection light source with the strip-shaped cross section are linearly arranged.
3. The hyperspectral projector according to any of claims 1-2, characterized in that each uniform spectral band split by the beam splitter grating (5-1) can uniformly cover the central illuminated area in a set period, and the central illuminated area is a DMD array of the back focal plane of the beam splitter grating (5-1).
4. The hyperspectral projector according to any of claims 1-2, wherein the digital micromirror (6) receives the spectral light source output by the spectral grating (5-1), each column of pixels corresponds to a sub-spectrum, each row of pixels receives different spectrum light at the same time, and each micromirror corresponds to a projection pixel when the digital micromirror (6) performs projection.
5. The hyperspectral projector according to claim 4, characterized in that the digital micromirror (6) is configured for pixel-gating the two-dimensionally arranged multispectral light sources as required to achieve spectral temporal modulation.
6. A method of using a hyperspectral projector using the hyperspectral projector according to any of claims 1 to 5, the method comprising the steps of:
step S1: acquiring a strip-shaped full-spectrum light source output by a full-spectrum light source;
step S2: calibrating the fast reflector driver (5-2), wherein the calibration content comprises a rotation angle and a frequency, the calibration principle is to minimize the loss of the output energy output from the light splitting grating (5-1) to the digital micromirror (6), and the swing angle of the light splitting grating (5-1) enables each sub-spectrum light output from the light splitting grating (5-1) to be projected onto each micromirror of the digital micromirror (6);
step S3: calibrating the circuit control system of the quick reflector driver (5-2) and the digital micromirror (6), wherein the calibrated content comprises the working time sequence between the quick reflector driver (5-2) and the digital micromirror (6) and the working state of the circuit control system of the digital micromirror (6), and the calibration principle is that the quick reflector driver (5-2) and the digital micromirror (6) work at the same time sequence and have no color deviation phenomenon when the full picture outputs a specific spectral band light;
step S4: and modulating and projecting the hyperspectral light source output by the light splitting grating (5-1), obtaining light with different spectral bands on each micro mirror of the digital micro mirror (6), and further obtaining a required hyperspectral image.
CN202210629549.1A 2022-06-01 2022-06-01 Hyperspectral projector and use method thereof Active CN115032853B (en)

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CN101069117A (en) * 2004-01-15 2007-11-07 汤寅生 Single panel color image projection system
CN101295123A (en) * 2007-04-25 2008-10-29 中国科学院光电研究院 Display system based on blazed grating photomodulator
JP2008310295A (en) * 2007-05-15 2008-12-25 Konica Minolta Opto Inc Image display apparatus
US20100020291A1 (en) * 2005-06-20 2010-01-28 Panasonic Corporation 2-dimensional image display device, illumination light source and exposure illumination device
CN103207449A (en) * 2013-04-17 2013-07-17 华中科技大学 Structured light quick scanning microscopic imaging method

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101069117A (en) * 2004-01-15 2007-11-07 汤寅生 Single panel color image projection system
US20100020291A1 (en) * 2005-06-20 2010-01-28 Panasonic Corporation 2-dimensional image display device, illumination light source and exposure illumination device
CN1786766A (en) * 2005-12-07 2006-06-14 云南省煤炭供销总公司 Flash grating digital micro lens display system
CN101295123A (en) * 2007-04-25 2008-10-29 中国科学院光电研究院 Display system based on blazed grating photomodulator
JP2008310295A (en) * 2007-05-15 2008-12-25 Konica Minolta Opto Inc Image display apparatus
CN103207449A (en) * 2013-04-17 2013-07-17 华中科技大学 Structured light quick scanning microscopic imaging method

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