CN111562714B

CN111562714B - Multispectral modulation imaging device based on multi-wavelength LED light source

Info

Publication number: CN111562714B
Application number: CN202010441266.5A
Authority: CN
Inventors: 王乐; 李敏; 陈智浩
Original assignee: Fudan University
Current assignee: Fudan University
Priority date: 2020-05-22
Filing date: 2020-05-22
Publication date: 2021-09-21
Anticipated expiration: 2040-05-22
Also published as: CN111562714A

Abstract

The invention provides a multispectral modulation imaging device based on a multi-wavelength LED light source. A lighting lens is arranged on one side of the main body shell, a projection lens is arranged on one side of the main body shell, which is positioned on the lighting lens, an LED optical device is arranged above the lighting lens on one side of the main body shell close to the lighting lens, a color filter device is arranged in the main body shell at the position corresponding to the lighting lens, a large straightener is arranged in the main body shell and is positioned right opposite to the lighting lens and the color filter device, a DMD is arranged in the main body shell and is positioned above the large straightener, a reflecting sheet corresponding to the DMD is arranged on one side of the large straightener, a small straightener is arranged between the luminous sheet and the DMD, white light is projected to an object by starting the LED illuminator, basic imaging is carried out, colored light irradiation is matched, external equipment is enabled to collect and analyze, comparison of spectral difference is carried out, so as to complement corresponding colors, ensure that the imaging colors are full, and ensure the authenticity of the image.

Description

Multispectral modulation imaging device based on multi-wavelength LED light source

Technical Field

The invention relates to the technical field of LED light source imaging, in particular to a multispectral modulation imaging device based on a multi-wavelength LED light source.

Background

Multispectral images are images that contain many bands, sometimes only 3 bands (color images are an example) but sometimes many more, even hundreds. Each band is a grayscale image that represents the brightness of the scene, derived from the sensitivity of the sensor used to create the band.

The imaging mode of multispectral by adopting the LED light is common, but the light wave range of the LED light is single, so that the imaging saturation is poor, and the color distortion is caused.

Therefore, there is a need to provide a new multi-spectral modulation imaging device based on multi-wavelength LED light source to solve the above technical problems.

Disclosure of Invention

In order to solve the technical problem, the invention provides a multispectral modulation imaging device based on a multi-wavelength LED light source, which can be used for regulating the projection imaging of the LED light source through the projection imaging of three-color light.

The multispectral modulation imaging device based on the multi-wavelength LED light source comprises: a multi-spectral modulation imaging apparatus based on a multi-wavelength LED light source, comprising: main part shell, daylighting camera lens and projecting lens, the daylighting camera lens is installed to main part shell one side, the main part shell is located daylighting camera lens one side and installs projecting lens, still includes: LED light utensil, look filter equipment, light integrator, big straightener, reflector panel, DMD, little straightener and spotlight ware, the main part shell is close to daylighting camera lens one side and is located the daylighting camera lens top and installs LED light utensil, the inside daylighting camera lens that is located of main part shell corresponds the position and installs the look filter equipment, main part shell is inside to be located daylighting camera lens and look filter equipment and just installs big straightener to the position, the inside big straightener top that is located of main part shell is installed DMD, install the reflector panel that corresponds with DMD on one side of the big straightener, and install little straightener between luminescent panel and the DMD, the inside spotlight ware of installing between projecting lens and the DMD that is located of main part shell.

Preferably, the LED light tool includes motor, driver, mounting disc and light source, the mounting disc rotates with the main part shell to be connected, the driver is installed inside the main part shell, the output and the mounting disc pivot of driver are connected, and the driver output is connected and is installed the motor, four light sources are installed to the mounting disc bottom surface symmetry, and the light source is red light, yellow light, blue light and white light respectively.

Preferably, the driver includes transmission shell, driven gear and driving gear, intermeshing's driven gear and driving gear are installed to the transmission shell internal rotation, motor output and driving gear fixed connection, the pivot and the driven gear of mounting disc, and driving gear and driven gear drive ratio are three to one.

Preferably, the color filter device comprises a packaging shell, an optical filter, a limiting groove, an electromagnet and a through groove, wherein three limiting grooves are formed in the packaging shell, the optical filter is slidably clamped in the limiting groove, the color of the optical filter is divided into red, yellow and blue, the through groove is formed in the position, corresponding to the limiting groove, of the side wall of the packaging shell, the electromagnet is arranged in the position, corresponding to the through groove, of the outer wall of the packaging shell, and the electromagnet penetrates through the through groove to be fixedly connected with the optical filter.

Preferably, the large straightener comprises a front condensing sheet, a rear condensing sheet and a ring shell, and the front condensing sheet and the rear condensing sheet are fixed in the ring shell in parallel.

Preferably, a light integrator is arranged inside the main body shell and between the color filter device and the large straightener in an aligned mode.

Preferably, the outer end of the lighting lens is packaged with a glass plate.

Preferably, the main body shell is made of hard plastics, and the inner wall of the main body shell is coated with black paint.

Compared with the related technology, the multispectral modulation imaging device based on the multi-wavelength LED light source has the following beneficial effects:

the invention provides a multispectral modulation imaging device based on a multi-wavelength LED light source, which comprises the following components:

1. the method comprises the steps that an LED light tool is started to project white light to an object, the white light is effectively conducted through light rays, an external imaging device and computer equipment are matched for collecting and imaging, the imaging chromaticity under the white light is weak, the color saturation is low, the LED light tool is converted to be sequentially irradiated by three colors of red light, yellow light and blue light, meanwhile, a color filter device is started to filter the light rays, the LED colored light is collected and analyzed by the external equipment, the spectral difference is compared, so that the corresponding color is supplemented, the imaging color is full, and the authenticity of an image is guaranteed;

2. conversion irradiation of white, red, yellow and blue LED light rays is conveniently realized through the LED light fixture, so that imaging contrast operation is more convenient.

Drawings

FIG. 1 is a schematic view of the overall front structure provided by the present invention;

FIG. 2 is a schematic view of the overall rear structure provided by the present invention;

FIG. 3 is a schematic diagram of an optical component layout structure according to the present invention;

FIG. 4 is a schematic view of a light guide structure according to the present invention;

FIG. 5 is a schematic diagram of an LED optical system according to the present invention;

FIG. 6 is a schematic diagram of an actuator structure provided by the present invention;

FIG. 7 is a schematic structural diagram of a color filter device according to the present invention;

fig. 8 is a schematic structural diagram of a straightener provided by the present invention.

Reference numbers in the figures: 1. a main body case; 2. a lighting lens; 3. an LED light fixture; 4. a projection lens; 5. a color filter device; 6. a light integrator; 7. a large straightener; 8. a light-reflecting sheet; 9. DMD; 10. a small straightener; 11. a condenser; 12. a motor; 13. a driver; 14. mounting a disc; 15. a light source; 16. a drive housing; 17. a driven gear; 18. a driving gear; 19. packaging the shell; 20. an optical filter; 21. a limiting groove; 22. an electromagnet; 23. a through groove; 24. a front light-gathering sheet; 25. a rear light-gathering sheet; 26. and (4) a ring shell.

Detailed Description

The invention is further described with reference to the following figures and embodiments.

Please refer to fig. 1, fig. 2, fig. 3, fig. 4, fig. 5, fig. 6, fig. 7 and fig. 8 in combination, wherein fig. 1 is a schematic view of an overall front structure provided by the present invention; FIG. 2 is a schematic view of the overall rear structure provided by the present invention; FIG. 3 is a schematic diagram of an optical component layout structure according to the present invention; FIG. 4 is a schematic view of a light guide structure according to the present invention; FIG. 5 is a schematic diagram of an LED optical system according to the present invention; FIG. 6 is a schematic diagram of an actuator structure provided by the present invention; FIG. 7 is a schematic structural diagram of a color filter device according to the present invention; fig. 8 is a schematic structural diagram of a straightener provided by the present invention. The multispectral modulation imaging device based on the multi-wavelength LED light source comprises: LED light fixture 3, color filter 5, light integrator 6, large collimator 7, reflector 8, DMD9, small collimator 10, and condenser 11.

In a specific implementation process, as shown in fig. 1, fig. 2, fig. 3, and fig. 4, a lighting lens 2 is installed at one side of a main body housing 1, a projection lens 4 is installed at one side of the lighting lens 2 of the main body housing 1, an LED optical device 3 is installed above the lighting lens 2 at one side of the main body housing 1 close to the lighting lens 2, a color filter 5 is installed at a position corresponding to the lighting lens 2 inside the main body housing 1, a large straightener 7 is installed at a position facing the lighting lens 2 and the color filter 5 inside the main body housing 1, a DMD9 is installed above the large straightener 7 inside the main body housing 1, a reflective sheet 8 corresponding to a DMD9 is installed at one side of the large straightener 7, a small straightener 10 is installed between the luminescent sheet and the DMD9, and a condenser 11 is installed between the projection lens 4 and the DMD9 inside the main body housing 1.

Referring to fig. 5, the LED optical device 3 includes a motor 12, an actuator 13, a mounting disc 14 and a light source 15, the mounting disc 14 is rotatably connected to the main body case 1, the actuator 13 is installed inside the main body case 1, an output end of the actuator 13 is connected to a rotating shaft of the mounting disc 14, the motor 12 is installed at an output end of the actuator 13, four light sources 15 are symmetrically installed on a bottom surface of the mounting disc 14, and the light sources 15 are a red light, a yellow light, a blue light and a white light respectively, when the light sources are irradiated, the motor 12 is turned on to drive the mounting disc 14 to drive the light sources 15 to rotate, positions of the light sources 15 are switched and adjusted, and irradiation of white light, red light, yellow light and blue light is sequentially performed.

Referring to fig. 6, the driver 13 includes a driving shell 16, a driven gear 17 and a driving gear 18, the driven gear 17 and the driving gear 18 are rotatably mounted in the driving shell 16 and engaged with each other, an output end of the motor 12 is fixedly connected to the driving gear 18, a rotating shaft of the mounting plate 14 is connected to the driven gear 17, and a transmission ratio of the driving gear 18 to the driven gear 17 is three to one, so that the transmission speed of the motor 12 to the mounting plate 14 is reduced through transmission of the driven gear 17 and the driving gear 18, and the lamp is switched stably.

Referring to fig. 7, the color filter device 5 includes a package 19, a filter 20, a limiting groove 21, an electromagnet 22 and a through groove 23, three limiting grooves 21 are formed in the package 19, the light filter 20 is slidably clamped in the limiting groove 21, the color of the light filter 20 is divided into red, yellow and blue, a through groove 23 is arranged on the side wall of the packaging shell 19 at the position corresponding to the limiting groove 21, an electromagnet 22 is arranged on the outer wall of the packaging shell 19 at the position corresponding to the through groove 23, the electromagnet 22 passes through the through groove 23 and is fixedly connected with the light filter 20, other parasitic light is filtered according to the adopted light irradiation requirement, the white light irradiation does not need to be filtered, the red, yellow and blue lights need to be filtered by the optical filter 20 with corresponding color, the light unicity is guaranteed to pass through, the electromagnet 22 is started to extend, the optical filter 20 with corresponding color descends along the limiting groove 21, and the light projected by the lighting lens 2 is guaranteed to pass through the optical filter 20.

Referring to fig. 8, the large straightener 7 includes a front condensing sheet 24, a rear condensing sheet 25 and a ring housing 26, the front condensing sheet 24 and the rear condensing sheet 25 are fixed in the ring housing 26 in parallel, and scattered light is refracted into parallel light by the front condensing sheet 24 and the rear condensing sheet 25.

Referring to fig. 4, a light integrator 6 is aligned and installed between the color filter 5 and the large collimator 7 inside the main body case 1, and disordered light is integrated into uniform light through the light integrator 6, so that the quality of light transmission is guaranteed.

Referring to fig. 3, a glass plate is encapsulated at the outer end of the lighting lens 2 to achieve sealing protection and prevent external dust from affecting the operation of the optical lens.

The main body shell 1 is made of hard plastics, and the inner wall of the main body shell 1 is coated with black paint, so that scattered light is absorbed, and the imaging quality is prevented from being influenced by scattered light reflection.

The working principle is as follows: when in projection imaging, the LED light tool 3 is started to project white light to an object, reflected light is guided into the main body shell 1 through the lighting lens 2, the light integrator 6 and the large straightener 7 integrate and parallel light, the parallel light is projected to the surface of DMD9 through the small straightener 10 through the reflector 8, the DMD9 reflects all light slightly, the reflected light is guided out from the projection lens 4 through the condenser 11 in an aggregation manner and is collected and imaged by matching with an external imaging device and computer equipment, the imaging chromaticity under the white light is weak, the color saturation is low, the LED light tool 3 is converted to be irradiated by three colors of red, yellow and blue light in sequence, the light is transmitted as above, meanwhile, the color filter device 5 is started to filter the light, the guided colored light is collected and analyzed by the external equipment, the contrast of spectral difference is carried out so as to complement corresponding colors, and the imaging color is relatively high, and the authenticity of the image is ensured.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. The utility model provides a multispectral modulation imaging device based on multi-wavelength LED light source, includes main part shell (1), daylighting camera lens (2) and projection lens (4), daylighting camera lens (2) are installed to main part shell (1) one side, main part shell (1) are located daylighting camera lens (2) one side and install projection lens (4), its characterized in that: the LED lighting device is characterized in that one side, close to a lighting lens (2), of a main body shell (1) is located above the lighting lens (2) and is provided with an LED lighting device (3), the inside of the main body shell (1) is located above the lighting lens (2) and is provided with a color filter device (5), the inside of the main body shell (1) is located above the lighting lens (2) and is provided with a large straightener (7) opposite to the color filter device (5), the inside of the main body shell (1) is located above the large straightener (7) and is provided with a DMD (9), one side of the large straightener (7) is provided with a reflector (8) corresponding to the DMD (9), a small straightener (10) is arranged between the light emitting sheet and the DMD (9), and the inside of the main body shell (1) is located between a projection lens (4) and the DMD (9) and is provided with a condenser (11); the LED lighting fixture (3) comprises a motor (12), a driver (13), a mounting disc (14) and light sources (15), wherein the mounting disc (14) is rotatably connected with the main body shell (1), the driver (13) is installed inside the main body shell (1), the output end of the driver (13) is connected with a rotating shaft of the mounting disc (14), the motor (12) is installed at the output end of the driver (13), four light sources (15) are symmetrically installed on the bottom surface of the mounting disc (14), and the light sources (15) are respectively a red light, a yellow light, a blue light and a white light; the transmission device (13) comprises a transmission shell (16), a driven gear (17) and a driving gear (18), the driven gear (17) and the driving gear (18) which are meshed with each other are rotatably mounted in the transmission shell (16), the output end of the motor (12) is fixedly connected with the driving gear (18), a rotating shaft of the mounting disc (14) is connected with the driven gear (17), and the transmission ratio of the driving gear (18) to the driven gear (17) is three to one; the color filter device (5) comprises a packaging shell (19), an optical filter (20), limiting grooves (21), electromagnets (22) and a through groove (23), wherein the packaging shell (19) is internally provided with the three limiting grooves (21), the optical filter (20) is slidably clamped in the limiting grooves (21), the color of the optical filter (20) is divided into red, yellow and blue, the side wall of the packaging shell (19) is provided with the through groove (23) at the position corresponding to the limiting grooves (21), the electromagnets (22) are arranged on the outer wall of the packaging shell (19) at the position corresponding to the through groove (23), and the electromagnets (22) penetrate through the through groove (23) and are fixedly connected with the optical filter (20); the large straightener (7) comprises a front light-gathering sheet (24), a rear light-gathering sheet (25) and a ring shell (26), wherein the front light-gathering sheet (24) and the rear light-gathering sheet (25) are fixed in the ring shell (26) in parallel; a light integrator (6) is arranged in the main body shell (1) between the color filter device (5) and the large straightener (7) in an aligned mode; a glass plate is packaged at the outer end of the lighting lens (2); the main body shell (1) is made of hard plastics, and black paint is coated on the inner wall of the main body shell (1); when in projection imaging, the LED optical tool (3) is started to project white light to an object, reflected light is guided into the main body shell (1) through the lighting lens (2), the light integrator (6) and the large straightener (7) integrate and parallel the light, the parallel light is projected to the surface of the DMD (9) through the small straightener (10) through the reflector (8), the DMD (9) reflects all the light slightly, the reflected light is collected and guided out from the projection lens (4) through the condenser (11) and is matched with an external imaging device and computer equipment for collection imaging, the imaging chromaticity under the white light is weak, the color saturation is low, the LED optical tool (3) is converted to be irradiated by red, yellow and blue light in sequence, the light is transmitted as above, and meanwhile, the color filter device (5) is started to filter the light, the derived colored light is collected and analyzed by external equipment, and the spectral difference is compared so as to complement corresponding colors, so that the imaging color is full, and the authenticity of the image is ensured.