DMD spectrum modulation collimation light source
Through the design of DMD spectral modulation of collimated light source, the spectrum is modulated using DMD array mirror, and uniform output and collimation of the light source are achieved through uniform rods and collimation lenses, solving the problems of low light efficiency and general monochromaticity of the existing spectral modulation light source, and achieving efficient spectral modulation and collimation effects.
Patent Information
- Application Number
- CN202420718509.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-09
- Publication Date
- 2025-03-21
- Estimated Expiration
- 2034-04-09
AI Technical Summary
The existing spectral modulation light sources use multi-light source method, with fewer output light sources and average monochromaticity, low light efficiency, making it difficult to achieve arbitrary spectral modulation and superposition.
The DMD spectral modulation of the collimated light source is used to achieve spectral modulation and collimation through the combination of a wide spectrum light source, a concave reflection grating, a DMD array mirror, a focus lens, a uniform light rod and a collimated lens. DMD array mirrors modulate the spectrum by controlling the flip of the micro mirror, and achieve uniform output and collimation of the light source through a uniform rod and a collimation lens.
It realizes any spectral modulation and superposition functions, has high output uniformity, excellent collimation, and high luminous efficiency, and is suitable for various lighting and spectral simulation requirements.
Smart Images
Figure CN222653190U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of light sources, in particular to a DMD spectrum modulation collimated light source. Background Art
[0002] At present, the light sources used for spectral modulation on the market generally use a multi-light source method, with fewer types of output light sources and general monochromaticity. The light source that uses a monochromator to achieve spectral modulation has a unique spectral output and low light efficiency. We combine the advantages of grating spectrometry and DMD modulated light with high light efficiency to achieve the functions of arbitrary spectral modulation and superposition, and add a homogenizer and a collimator at the output end of the light source to achieve the effect of a uniform collimated light source. Utility Model Content
[0003] In order to solve the problems existing in the above-mentioned prior art, the utility model provides a DMD spectrum modulated collimated light source. The technical solution adopted by the utility model to solve its technical problems is:
[0004] A DMD spectrally modulated collimated light source comprises a wide-spectrum light source 1, a concave reflection grating 2, a DMD array reflector 3, a focusing lens 4, a homogenizing rod 5 and a collimating lens 6; wherein: the concave reflection grating 2 is arranged at the rear of the wide-spectrum light source 1, the DMD array reflector 3 is arranged on the top of the concave reflection grating 2, the focusing lens 4 is arranged at the rear of the DMD array reflector 3, the homogenizing rod 5 is arranged at the rear of the focusing lens 4, and the collimating lens 6 is arranged at the rear of the homogenizing rod 5.
[0005] The utility model also has the following additional technical features:
[0006] As a further specific optimization of the technical solution of the utility model: the wide-spectrum light source 1 is used to provide wide-spectrum illumination, and the wide-spectrum light source 1 is a halogen lamp, a xenon lamp or any other wide-spectrum bulb.
[0007] As a further specific optimization of the technical solution of the utility model: the concave reflection grating 2 is used to gather and split the light emitted by the light source through the concave reflection grating to obtain a rectangular light spot after splitting, and the light spot just covers the working area of the entire DMD array reflector. The concave reflection grating 2 is a Jintao Optoelectronics concave grating, with a radius R=113mm, an input arm of 100mm, an output arm of 94mm, an angle of 61.6 degrees, an overall size of 32*32*9.5mm, a scaled line of 1200 lines / mm, a line dispersion inverse of 8nm / mm, and a use band of 250-900nm.
[0008] As a further specific optimization of the technical solution of the utility model: by controlling the flipping of each small mirror on the DMD array reflector 3, the required spectrum after light splitting is reflected into the homogenizing rod, and the unnecessary spectrum is reflected outside the homogenizing rod; the model of the control DMD array reflector 3 is Juzi Optoelectronics JUOPT-DLP7000DMD array reflector, DMD (Digital Micromirror Device) is a micro-electromechanical light modulator, manufactured by MEMS technology, and its core component is a two-dimensional array composed of millions of micro-mirrors. Each micromirror corresponds to a pixel, and its state is determined by the control signal, so as to achieve reflection and non-reflection of light.
[0009] As a further specific optimization of the technical solution of the utility model: the modulated spectrum is converged into the homogenizing rod through the focusing lens 4, and the focusing lens 4 is a general plano-convex lens.
[0010] As a further specific optimization of the technical solution of the utility model: the light is uniformed after multiple total reflections in the uniform light rod 5 to obtain uniform light output; the uniform light rod 5 is a quartz glass rod of 80mmX7mmX7mm.
[0011] As a further specific optimization of the technical solution of the utility model: the collimating lens 6 collimates the light output by the homogenizing rod and then projects it; the collimating lens 6 is a multi-lens group, which realizes the collection and projection of the light emitted by the homogenizing rod.
[0012] Compared with the prior art, the utility model has the following advantages:
[0013] The utility model adopts concave grating light splitting and DMD array reflector modulation to realize arbitrary modulation of spectral light source. The utility model uses a light homogenizing rod to homogenize the light, and the light source output uniformity is high, better than 95%. The utility model collimates the lens to project, and obtains a light source with high collimation, and the divergence angle of the light source is less than ±1°. The utility model has a simple system structure and high light efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a structural schematic diagram of the utility model.
[0015] Description of reference numerals: wide spectrum light source 1 , concave reflection grating 2 , DMD array reflector 3 , focusing lens 4 , homogenizing rod 5 and collimating lens 6 . DETAILED DESCRIPTION
[0016] Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings.
[0017] Example 1
[0018] The DMD spectrally modulated collimated light source comprises a wide-spectrum light source 1, a concave reflection grating 2, a DMD array reflector 3, a focusing lens 4, a homogenizing rod 5 and a collimating lens 6; wherein: the concave reflection grating 2 is arranged at the rear of the wide-spectrum light source 1, the DMD array reflector 3 is arranged on the top of the concave reflection grating 2, the focusing lens 4 is arranged at the rear of the DMD array reflector 3, the homogenizing rod 5 is arranged at the rear of the focusing lens 4, and the collimating lens 6 is arranged at the rear of the homogenizing rod 5.
[0019] The broad-spectrum light source 1 is used to provide broad-spectrum illumination, and the broad-spectrum light source 1 is a halogen lamp, a xenon lamp or any other broad-spectrum light bulb.
[0020] The concave reflection grating 2 is used to gather and split the light emitted by the light source through the concave reflection grating to obtain a rectangular light spot after splitting, and the light spot just covers the working area of the entire DMD array reflector. The concave reflection grating 2 is a Jintao Optoelectronics concave grating with a radius R=113mm, an input arm of 100mm, an output arm of 94mm, an angle of 61.6 degrees, an overall size of 32*32*9.5mm, a scaled line of 1200 lines / mm, a linear dispersion inverse of 8nm / mm, and an operating band of 250-900nm.
[0021] By controlling the flipping of each small mirror on the DMD array reflector 3, the required spectrum after splitting is reflected into the homogenizing rod, and the unnecessary spectrum is reflected outside the homogenizing rod; the model of the DMD array reflector 3 is the JUOPT-DLP7000DMD array reflector of Juzi Optoelectronics. DMD (Digital Micromirror Device) is a micro-electromechanical light modulator manufactured by MEMS technology, and its core component is a two-dimensional array composed of millions of micro-mirrors. Each micro-mirror corresponds to a pixel, and its state is determined by the control signal, so as to achieve reflection or non-reflection of light.
[0022] The modulated spectrum is converged into the homogenizing rod by the focusing lens 4 , and the focusing lens 4 is a general plano-convex lens.
[0023] The light is uniformly reflected multiple times in the uniform light rod 5, and a uniform light output is obtained; the uniform light rod 5 is a quartz glass rod of 80mmX7mmX7mm.
[0024] The collimating lens 6 collimates the light outputted from the homogenizing rod and then projects it; the collimating lens 6 is a group of multiple lenses, which realizes the collection and projection of the light outputted from the homogenizing rod.
[0025] The principle of DMD spectrally modulated collimated light source: In order to obtain a spectrally modulated light source, the wide spectrum light source is first focused and split through a concave grating to form a split light spot on the DMD, and then the required spectrum is reflected and focused into the homogenizer through the array reflector on the DMD. The light is homogenized after multiple total reflections on the inner wall of the homogenizer, and finally output through the collimating lens. The unnecessary spectrum is reflected outside the homogenizer and not output, so that the required spectrally modulated light can be obtained, and uniform collimated light can be output. In this way, you only need to control the array reflector on the DMD to obtain a collimated light source with any modulated spectrum. It can be used as a lighting source for various needs and various spectral simulation light sources.
[0026] The above detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention but merely represents selected embodiments of the present invention.
Claims
1. A DMD spectrally modulated collimated light source, characterized in that: The invention comprises a wide-spectrum light source (1), a concave reflection grating (2), a DMD array reflector (3), a focusing lens (4), a light homogenizing rod (5) and a collimating lens (6); wherein: the concave reflection grating (2) is arranged at the rear of the wide-spectrum light source (1), the DMD array reflector (3) is arranged on the top of the concave reflection grating (2), the focusing lens (4) is arranged at the rear of the DMD array reflector (3), the light homogenizing rod (5) is arranged at the rear of the focusing lens (4), and the collimating lens (6) is arranged at the rear of the light homogenizing rod (5).
2. A DMD spectrally modulated collimated light source according to claim 1, characterized in that: The broad spectrum light source (1) is used to provide broad spectrum illumination. The broad spectrum light source (1) is a halogen lamp, a xenon lamp or any other broad spectrum bulb.
3. A DMD spectrally modulated collimated light source according to claim 1, characterized in that: The concave reflection grating (2) is used to collect and split the light emitted by the light source through the concave reflection grating to obtain a rectangular light spot after splitting, and the light spot just covers the working area of the entire DMD array reflector. The concave reflection grating (2) has a radius R=113mm, an input arm of 100mm, an output arm of 94mm, an angle of 61.6 degrees, an overall size of 32*32*9.5mm, a scribed line of 1200 lines / mm, a linear dispersion inverse of 8nm / mm, and an operating band of 250-900nm.
4. A DMD spectrally modulated collimated light source according to claim 1, characterized in that: By controlling the flipping of each small mirror on the DMD array reflector (3), the required spectrum after light splitting is reflected into the light homogenizing rod, and the unnecessary spectrum is reflected outside the light homogenizing rod; the model of the controlled DMD array reflector (3) is JUOPT-DLP7000DMD array reflector.
5. A DMD spectrally modulated collimated light source according to claim 1, characterized in that: The modulated spectrum is converged into the light homogenizing rod through a focusing lens (4), and the focusing lens (4) is a general plano-convex lens.
6. A DMD spectrally modulated collimated light source according to claim 1, characterized in that: The light is uniformly reflected multiple times in the uniform light rod (5) to obtain uniform light output; the uniform light rod (5) is a quartz glass rod with a size of 80 mm x 7 mm x 7 mm.
7. A DMD spectrally modulated collimated light source according to claim 1, characterized in that: The collimating lens (6) collimates the light output by the light homogenizing rod and then projects it; The collimating lens (6) is a multi-lens group.