Spectrum synthesis device

Abstract

The utility model discloses a spectrum synthesis device, which is characterized in that light with different central wavelengths is emitted by a plurality of light-emitting modules and is mixed to form output light of the spectrum synthesis device, so that the spectrum of the output light meets the requirement. According to the spectrum synthesis device, the first light distribution part achieves light distribution by means of a microstructure which is arranged on the optical surface and has the size of nanoscale, and compared with a traditionally-used reflection cup or lens, the reflection cup achieves light distribution by means of a large-size reflection surface, and the lens achieves light distribution by means of light refraction by means of a large-size curved surface, so that the thickness of the first light distribution part in the spectrum synthesis device can be reduced; the size of the first light distribution part is small, and the size and the weight of the spectrum synthesis device can be reduced.

Description

Technical Field

[0001] The utility model relates to the field of optical systems, and particularly to a spectrum synthesis device. Background Art

[0002] In some application fields, spectrum synthesis is involved, where one or more light sources are used to synthesize a specific spectrum required for the application. There are various ways to achieve spectrum synthesis. One way is to use a gas discharge light source such as a xenon lamp or a metal halide lamp plus a filter to simulate a target spectrum such as the sun as much as possible. Another way is to mix the light emitted by a plurality of light emitting devices with different wavelengths to form a target spectrum. In practical applications, this type of method requires light distribution to make the light intensity distribution or the emission angle of the emitted light meet the application requirements. In the prior art, each light emitting device is arranged on a substrate, and a reflector cup or a lens is used for light distribution. However, in some application scenarios, a plurality of light emitting devices with different wavelengths need to be used, and the number of light emitting devices to be used is relatively large. When using a reflector cup or a lens for light distribution, the device has a large volume and is relatively heavy. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a spectrum synthesis device, which can reduce the volume and weight.

[0004] To achieve the above purpose, the utility model provides the following technical solutions:

[0005] A spectrum synthesis device includes:

[0006] A substrate;

[0007] At least two light emitting modules, which are respectively arranged on the substrate, and the at least two light emitting modules emit light with at least two different central wavelengths;

[0008] At least two first light distribution parts, which are correspondingly arranged with the light emitting modules and are arranged on the light emitting side of the light emitting modules. The first light distribution parts are provided with optical surfaces through which the light emitted by the light emitting modules passes. The optical surfaces are provided with microstructures with sizes in the nanometer scale, so that when the light emitted by the light emitting modules passes through the optical surfaces, the properties of the emitted light are modulated, and the light intensity distribution of the emitted light meets the requirements after passing through the first light distribution parts.

[0009] Optionally, the optical surfaces are provided with the microstructures, so that when the light emitted by the light emitting modules passes through the optical surfaces, any one or any combination of the light wave phase, light wave amplitude and polarization state of the emitted light is modulated, and the light intensity distribution of the emitted light meets the requirements after passing through the first light distribution parts.

[0010] Optionally, the microstructures are arranged in two dimensions on the optical surfaces.

[0011] Optionally, with the center of the optical surface as the center and along the radial direction of the optical surface, the shape parameters of the microstructure vary in a gradient, in sub-regions, or randomly.

[0012] Optionally, the microstructure includes columnar protrusions, the cross-sectional dimensions of the columnar protrusions are at the nanoscale, and the height of the columnar protrusions is at the nanoscale.

[0013] Optionally, the cross-section of the columnar protrusion is circular, oval, square, trapezoidal, or a polygon with more than four sides.

[0014] Optionally, the first light distribution part includes a layered substrate, and one side surface of the layered substrate is the optical surface.

[0015] Optionally, the at least two first light distribution parts are integrally formed.

[0016] Optionally, the at least two light-emitting modules include a first light-emitting module, a second light-emitting module, a third light-emitting module, and a fourth light-emitting module. The first light-emitting module, the second light-emitting module, the third light-emitting module, and the fourth light-emitting module are arranged in a rectangular array and the central wavelengths of the emitted light of each light-emitting module are different;

[0017] Or, the at least two light-emitting modules include a first light-emitting module, a second light-emitting module, a third light-emitting module, a fourth light-emitting module, a fifth light-emitting module, and a sixth light-emitting module. The first light-emitting module, the second light-emitting module, the third light-emitting module, the fourth light-emitting module, the fifth light-emitting module, and the sixth light-emitting module are arranged in a rectangular array;

[0018] Or, the at least two light-emitting modules include a first light-emitting module, a second light-emitting module, a third light-emitting module, a fourth light-emitting module, a fifth light-emitting module, a sixth light-emitting module, a seventh light-emitting module, and an eighth light-emitting module. The first light-emitting module, the second light-emitting module, the third light-emitting module, the fourth light-emitting module, the fifth light-emitting module, the sixth light-emitting module, the seventh light-emitting module, and the eighth light-emitting module are arranged in a rectangular array;

[0019] Or, the at least two light-emitting modules include four rows and four columns of the light-emitting modules arranged in an array, or the at least two light-emitting modules include five rows and five columns of the light-emitting modules arranged in an array.

[0020] Optionally, further includes:

[0021] At least one preset light-emitting module for emitting light;

[0022] At least one second light distribution part, which is correspondingly arranged with the preset light-emitting module and is arranged on the light-emitting side of the preset light-emitting module. The second light distribution part is used to make the light intensity distribution of the light emitted by the preset light-emitting module meet the requirements after passing through the second light distribution part. The second light distribution part includes a reflector cup or a lens.

[0023] As can be seen from the above technical solutions, a spectrum synthesis device provided by the present invention includes: a substrate; at least two light-emitting modules, which are respectively arranged on the substrate. The at least two light-emitting modules emit lights with at least two different central wavelengths; at least two first light distribution parts, which are correspondingly arranged with the light-emitting modules and are arranged on the light-emitting side of the light-emitting modules. The first light distribution part is provided with an optical surface through which the light emitted by the light-emitting module passes. The optical surface is provided with microstructures with sizes in the nanometer scale, so that the attributes of the light emitted by the light-emitting module are modulated when passing through the optical surface, and the light intensity distribution of the light emitted through the first light distribution part meets the requirements.

[0024] The spectrum synthesis device of the present invention emits lights with different central wavelengths through multiple light-emitting modules and mixes them to form the output light of the spectrum synthesis device, so that the output light spectrum meets the requirements. The first light distribution part realizes light distribution by relying on the microstructures with sizes in the nanometer scale arranged on the optical surface. Compared with the traditional reflector cup or lens used, the reflector cup relies on a large-sized reflecting surface for light distribution and the lens relies on a large-sized curved surface for light refraction for light distribution. The thickness of the first light distribution part in this spectrum synthesis device can be reduced, making the volume of the first light distribution part smaller, and enabling the spectrum synthesis device to reduce its volume and weight. Description of the Drawings

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0026] Figure 1 It is a schematic diagram of a spectrum synthesis device provided by an embodiment of the present invention;

[0027] Figure 2 It is a layout schematic diagram of a light-emitting module and a first light distribution part of a spectrum synthesis device provided by an embodiment of the present invention;

[0028] Figure 3 It is a schematic diagram of the mixed light after the light emitted by the light-emitting module of a spectrum synthesis device provided by an embodiment of the present invention passes through the corresponding first light distribution part;

[0029] Figure 4The top view of the optical surface of the first light distribution part of a spectral synthesis device provided by an embodiment of the present utility model;

[0030] Figure 5 The top view of the optical surface of the first light distribution part of a spectral synthesis device provided by another embodiment of the present utility model;

[0031] Figure 6 The longitudinal sectional schematic diagram of a part of the first light distribution part of a spectral synthesis device provided by an embodiment of the present utility model;

[0032] Figure 7 The front view of a spectral synthesis device provided by another embodiment of the present utility model;

[0033] Figure 8 For Figure 7 The schematic diagram of the mixed light after the emitted light of the light emitting module in the shown spectral synthesis device passes through the corresponding first light distribution part;

[0034] Figure 9 The front view of a spectral synthesis device provided by another embodiment of the present utility model;

[0035] Figure 10 The schematic diagram of a spectral synthesis device provided by another embodiment of the present utility model.

[0036] The reference numerals in the accompanying drawings of the specification include:

[0037] 100 - substrate, 101 - light emitting module, 102 - first light distribution part, 103 - micro - structure, 104 - layered matrix, 105 - first light emitting module, 106 - first one light distribution part, 107 - second light emitting module, 108 - first two light distribution parts, 109 - third light emitting module, 110 - first three light distribution parts, 111 - fourth light emitting module, 112 - first four light distribution parts, 113 - preset light emitting module, 114 - second light distribution part. Detailed implementation manners

[0038] In order to enable those skilled in the art to better understand the technical solutions in the present utility model, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0039] This embodiment provides a spectral synthesis device, including:

[0040] A substrate;

[0041] At least two light-emitting modules, which are respectively arranged on the substrate, and the at least two light-emitting modules emit lights with at least two different central wavelengths;

[0042] At least two first light distribution parts, which are correspondingly arranged with the light-emitting modules and are arranged on the light-emitting side of the light-emitting modules. The first light distribution parts are provided with optical surfaces through which the emitted lights of the light-emitting modules pass. The optical surfaces are provided with microstructures with sizes in the nanometer scale, so that when the emitted lights of the light-emitting modules pass through the optical surfaces, the attributes of the emitted lights are modulated, and the light intensity distribution of the emitted lights meets the requirements after passing through the first light distribution parts.

[0043] The at least two light-emitting modules can emit lights with at least two different central wavelengths. By mixing the at least two lights with different central wavelengths, the output light of the spectral synthesis device is formed, and the spectrum of the output light of the spectral synthesis device meets the requirements.

[0044] The emitted light of the light-emitting module is incident on the corresponding first light distribution part and will pass through the optical surface of the first light distribution part. The optical surface is provided with microstructures with sizes in the nanometer scale. Relying on the microstructures arranged on the optical surface, the attributes of the light passing through the optical surface can be modulated, and the light intensity distribution of the light passing through the first light distribution part can be regulated. In this way, the emitted light of the light-emitting module is subjected to light distribution by the first light distribution part.

[0045] The first light distribution part realizes light distribution by relying on the microstructures with sizes in the nanometer scale arranged on the optical surface. Compared with the traditional reflector cup or lens used, the reflector cup relies on the large-sized reflecting surface for light distribution and the lens relies on the large-sized curved surface for light refraction for light distribution. In this spectral synthesis device, the thickness of the first light distribution part can be reduced, so that the volume of the first light distribution part is small, and the volume and weight of the spectral synthesis device can be reduced.

[0046] Exemplarily, reference can be made to Figure 1 , Figure 1 , which is a schematic diagram of a spectral synthesis device provided for an embodiment. As shown in the figure, it includes light-emitting modules 1 to light-emitting module n arranged in sequence, and correspondingly provided with first light distribution parts 1 to first light distribution parts n, where n is a positive integer greater than 1.

[0047] Exemplarily, reference can be made to Figure 2 and Figure 3 , Figure 2 , which is a schematic diagram of the arrangement of the light-emitting module and the first light distribution part of a spectral synthesis device provided for an embodiment. Figure 3 , which is a schematic diagram of the mixing of the emitted light of the light-emitting module of a spectral synthesis device passing through the corresponding first light distribution part. The solid lines with arrows in the figure represent the light propagation directions. As Figure 2As shown, the first light distribution unit 102 is disposed on the light-emitting side of the light-emitting module 101. The light emitted by the light-emitting module 101 is emitted after passing through the first light distribution unit 102. Based on the function of the first light distribution unit 102, the light intensity distribution after light emission meets the requirements. The light intensity distribution can be obtained according to the light spot formed by the emitted light on the working surface.

[0048] As Figure 3 shown, a plurality of light-emitting modules 101 are disposed on the substrate 100 and arranged in sequence. Each light-emitting module 101 is correspondingly provided with a first light distribution unit 102. Each first light distribution unit 102 regulates the light intensity distribution after the emitted light of the corresponding light-emitting module 101 is emitted. The emitted lights of the respective light-emitting modules 101 after being regulated by the corresponding first light distribution units 102 are mixed with each other to form the output light of the spectral synthesis device, so that the light intensity distribution of the output light of the spectral synthesis device meets the requirements.

[0049] The microstructures disposed on the optical surface refer to structures that can change the properties of light when light passes through the optical surface and passes through the microstructures. The size of the microstructures in the nanoscale means that the size of the microstructures is from 1 nanometer to 10,000 nanometers. The microstructures disposed on the optical surface can be structures that protrude or recess relative to the optical surface on the optical surface. In some embodiments, the microstructures are disposed on the optical surface of the first light distribution unit 102, so that any one or any more of the light wave phase, light wave amplitude, and polarization state of the emitted light are modulated when the emitted light of the light-emitting module 101 passes through the optical surface, so that the light intensity distribution of the emitted light meets the requirements after passing through the first light distribution unit 102. The emitted light of the light-emitting module 101 is incident on the corresponding first light distribution unit 102 and will pass through the optical surface of the first light distribution unit 102. The optical surface is provided with microstructures in the nanoscale. The microstructures modulate any one or any more of the light wave phase, light wave amplitude, and polarization state of the transmitted light, so that the light intensity distribution meets the requirements after the light passes through the first light distribution unit 102. Thus, the first light distribution unit 102 performs light distribution on the emitted light of the light-emitting module 101.

[0050] In this embodiment, the arrangement form of the microstructures on the optical surface is not limited. In practical applications, it can be designed according to the wavelength of light and the requirements for the light intensity distribution after light distribution. The microstructures on the optical surface can be periodically arranged or non-periodically arranged.

[0051] In some embodiments, the microstructures on the optical surface are arranged in two dimensions, that is, the microstructures on the optical surface are two-dimensionally arranged. In any one of the dimensions, the microstructures can be periodically arranged or non-periodically arranged. In some embodiments, the microstructures on the optical surface can be arranged in a rectangular array, a hexagonal array, or a circular array, or can also be arranged to form an array of other shapes. Exemplarily, reference can be made to Figure 4 , Figure 4The top view of the optical surface of the first light distribution part of a spectral synthesis device provided for an embodiment, wherein the cross-section of the microstructure 103 is circular, microstructures with different cross-section diameters are provided, and the microstructures 103 are arranged two-dimensionally. Exemplarily, reference can be made to Figure 5 , Figure 5 The top view of the optical surface of the first light distribution part of a spectral synthesis device provided for another embodiment. As shown in the figure, a square array is formed by the microstructures 103 on the first light distribution part 102, and the cross-section of the microstructures 103 is rectangular.

[0052] In some embodiments, centered on the center of the optical surface of the first light distribution part 102, along the radial direction of the optical surface, the shape parameters of the microstructures change in a gradient manner, in a zoned manner, or randomly. The shape parameters of the microstructures include but are not limited to the cross-section size of the microstructures, the height of the microstructures, the tilt angle, or the rotation angle. The shape parameters of the microstructures changing in a gradient manner means that along the radial direction of the optical surface, the shape parameters of the microstructures gradually change with the corresponding gradient. The shape parameters of the microstructures changing in a zoned manner means that in different regions along the radial direction of the optical surface, the shape parameters of the microstructures are different.

[0053] In this embodiment, the shape of the microstructures 103 provided on the optical surface of the first light distribution part 102 is not limited, as long as it can modulate the properties of light when light passes through and can control the light intensity distribution after the light passes through. The microstructures 103 provided on the optical surface of the first light distribution part 102 can be protrusions or grooves provided on the optical surface of the first light distribution part 102.

[0054] In some embodiments, the microstructures 103 include columnar protrusions, the cross-section size of the columnar protrusions is in the nanoscale, and the height of the columnar protrusions is in the nanoscale. In this embodiment, the cross-section shape of the columnar protrusions is not limited, and the cross-section of the columnar protrusions can be circular, oval, triangular, square, trapezoidal, or a polygon with more than four sides. The longitudinal section shape of the columnar protrusions is not limited, and the longitudinal section of the columnar protrusions can be square, trapezoidal, or other polygons. Exemplarily, reference can be made to Figure 6 , Figure 6 The schematic longitudinal section view of a part of the first light distribution part of a spectral synthesis device provided for an embodiment. As shown in the figure, the microstructures 103 provided on one side surface of the first light distribution part 102 include columnar protrusions, and the longitudinal section of the columnar protrusions is trapezoidal, and the diameter of the top end is smaller than that of the bottom end.

[0055] In some embodiments, the first light distribution part 102 includes a layered substrate 104, and one side surface of the layered substrate 104 is an optical surface. For the layered substrate 104, a microstructure 103 is provided on one side surface of the layered substrate 104, and the size of the microstructure 103 is at the nanoscale. Then, the first light distribution part 102 as a whole can be considered as a layered structure, and the first light distribution part 102 achieves the light distribution purpose by means of the microstructure provided on one side surface of the layered substrate, so that the thickness of the layered substrate 104 itself can be relatively small. Therefore, compared with the conventional reflector cup or lens, it has a smaller volume and a smaller weight. Exemplarily, reference can be made to Figure 6 As shown, a microstructure 103 is provided on one side surface of the layered substrate 104, and the microstructure 103 includes columnar protrusions, and the longitudinal cross-sectional shape of the columnar protrusions is trapezoidal.

[0056] In some embodiments, each of the at least two first light distribution parts 102 is independent, and each first light distribution part 102 is obtained by separate processing, and each first light distribution part 102 is correspondingly installed with a corresponding light-emitting module 101. In some embodiments, the at least two first light distribution parts 102 are integrally formed, and microstructures 103 can be respectively processed in different regions on one side surface of the same substrate, and the microstructures 103 in different regions correspond to different light-emitting modules 101.

[0057] In this embodiment, the number of the included light-emitting modules 101 and the arrangement form of the light-emitting modules 101 are not respectively limited, and the types of the central wavelengths of the light emitted by the at least two light-emitting modules 101 are not limited. In practical applications, they can be set according to the spectrum to be synthesized.

[0058] In some embodiments, the at least two light-emitting modules 101 include a first light-emitting module 105, a second light-emitting module 107, a third light-emitting module 109, and a fourth light-emitting module 111. The first light-emitting module 105, the second light-emitting module 107, the third light-emitting module 109, and the fourth light-emitting module 111 are arranged in a rectangular array and the central wavelengths of the emitted light of each light-emitting module are different; the at least two first light distribution parts include first light distribution parts 102 respectively corresponding to the first light-emitting module 105, the second light-emitting module 107, the third light-emitting module 109, and the fourth light-emitting module 111. Exemplarily, reference can be made to Figure 7 and Figure 8 , Figure 7 which is a front view of a spectral synthesis device provided for another embodiment, Figure 8 is Figure 7Schematic diagram of the mixed light after the outgoing light of the light-emitting module in the shown spectral synthesis device passes through the corresponding first light distribution part. As shown in the figure, the first light-emitting module 105, the second light-emitting module 107, the third light-emitting module 109, and the fourth light-emitting module 111 are arranged in a rectangular array. The first light distribution part 106 is correspondingly arranged with the first light-emitting module 105, the second light distribution part 108 is correspondingly arranged with the second light-emitting module 107, the third light distribution part 110 is correspondingly arranged with the third light-emitting module 109, and the fourth light distribution part 112 is correspondingly arranged with the fourth light-emitting module 111.

[0059] The central wavelengths of the outgoing light of the first light-emitting module 105, the second light-emitting module 107, the third light-emitting module 109, and the fourth light-emitting module 111 can be 450 nm, 550 nm, 630 nm, and 1000 nm. The first light distribution part 106, the second light distribution part 108, the third light distribution part 110, and the fourth light distribution part 112 respectively perform optical modulation on the monochromatic outgoing light of these four wavelengths, so as to form a light spot with a specific irradiance and irradiation uniformity on the working surface at a certain distance.

[0060] Each light-emitting module is arranged on the same substrate 100, and chip on board (COB) technology can be used for packaging. The light-emitting module 101 can be but is not limited to a light-emitting diode, that is, an LED chip.

[0061] In some embodiments, the at least two light-emitting modules 101 include a first light-emitting module, a second light-emitting module, a third light-emitting module, a fourth light-emitting module, a fifth light-emitting module, and a sixth light-emitting module. The first light-emitting module, the second light-emitting module, the third light-emitting module, the fourth light-emitting module, the fifth light-emitting module, and the sixth light-emitting module are arranged in a rectangular array. The six light-emitting modules 101 emit light of at least two different central wavelengths.

[0062] In some embodiments, the at least two light-emitting modules 101 include a first light-emitting module, a second light-emitting module, a third light-emitting module, a fourth light-emitting module, a fifth light-emitting module, a sixth light-emitting module, a seventh light-emitting module, and an eighth light-emitting module. The first light-emitting module, the second light-emitting module, the third light-emitting module, the fourth light-emitting module, the fifth light-emitting module, the sixth light-emitting module, the seventh light-emitting module, and the eighth light-emitting module are arranged in a rectangular array. The eight light-emitting modules 101 emit light of at least two different central wavelengths.

[0063] In some embodiments, the at least two light-emitting modules 101 include four rows and four columns of the light-emitting modules 101 arranged in an array, and the sixteen light-emitting modules 101 emit light of at least two different central wavelengths. In some embodiments, the at least two light-emitting modules 101 include five rows and five columns of light-emitting modules 101 arranged in an array. In some embodiments, the at least two light-emitting modules include light-emitting modules 101 with sixteen different central wavelengths of emitted light, and a first light distribution part 102 is correspondingly arranged for each light-emitting module 101. Exemplarily, reference can be made to Figure 9 , Figure 9 which is a front view of a spectral synthesis device provided for another embodiment. As shown in the figure, there are sixteen light-emitting modules 101, and the central wavelengths of the emitted light of the sixteen light-emitting modules 101 are different from each other. The sixteen light-emitting modules 101 are arranged in a rectangular array in rows and columns. Sixteen regions are defined on the optical surface of a substrate corresponding to the sixteen light-emitting modules 101, and the regions correspond to the light-emitting modules 101 one by one. A corresponding microstructure 103 is arranged in each region, and the emitted light of the corresponding light-emitting module 101 is subjected to light distribution through the microstructure 103 in the corresponding region.

[0064] In some embodiments, the spectral synthesis device further includes: at least one preset light-emitting module 113 for emitting light; at least one second light distribution part 114 correspondingly arranged with the preset light-emitting module 113 and disposed on the light-emitting side of the preset light-emitting module 113, and the second light distribution part 114 is used to make the intensity distribution of the emitted light of the preset light-emitting module 113 meet the requirements after passing through the second light distribution part 114. The second light distribution part 114 includes a reflector cup or a lens. Exemplarily, reference can be made to Figure 10 , Figure 10 which is a schematic diagram of a spectral synthesis device provided for another embodiment. As shown in the figure, the spectral synthesis device includes a light-emitting module 101 and a correspondingly arranged first light distribution part 102, and further includes a preset light-emitting module 113 and a correspondingly arranged second light distribution part 114. The second light distribution part 114 includes a reflector cup or a lens. The preset light-emitting module 113 can emit monochromatic light or white light.

[0065] Compared with the traditional use of a reflector cup or a lens, the multi-spectral synthesis device of this embodiment has the following advantages:

[0066] 1) Small volume and light weight: By adopting the planar structure of the superlens module, the volume and weight are greatly reduced, which is particularly important for the miniaturization and micro-miniaturization of related devices.

[0067] 2) Good optical performance: By using a metalens to individually modulate each light source chip in the COB, the dispersion phenomenon that easily occurs in light distribution using methods such as lenses for broadband light sources is avoided, and the spectral consistency and uniformity of the working surface are improved.

[0068] 3) Design flexibility: By adjusting the nanostructure of the metasurface, optical characteristics such as the light field distribution can be easily customized, enabling the design of multifunctional and flexible optical systems, and solving the problem that traditional COB light sources, as surface light sources, are not easy to distribute light.

[0069] 4) Easy integration: The planar design facilitates direct integration with other optoelectronic devices, promoting the compactness and integration of optical systems.

[0070] The spectral synthesis device provided by the present utility model has been introduced in detail above. Specific examples are used herein to elaborate on the principle and implementation manner of the present utility model. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model. It should be noted that for those of ordinary skill in the art of this technology, without departing from the principle of the present utility model, several improvements and modifications can still be made to the present utility model, and these improvements and modifications also fall within the protection scope of the claims of the present utility model.

Claims

1. A spectral synthesis device, characterized in that, Comprising: A substrate; At least two light-emitting modules respectively disposed on the substrate, and the at least two light-emitting modules emit lights with at least two different central wavelengths; At least two first light distribution parts, the first light distribution parts are correspondingly disposed with the light-emitting modules and are disposed on the light-emitting side of the light-emitting modules, the first light distribution parts are provided with an optical surface through which the light emitted by the light-emitting modules passes, and the optical surface is provided with microstructures with dimensions in the nanoscale, so that when the light emitted by the light-emitting modules passes through the optical surface, the properties of the emitted light are modulated, and the light intensity distribution of the emitted light meets the requirements after passing through the first light distribution parts.

2. The spectral synthesis device according to claim 1, wherein The optical surface is provided with the microstructures, so that when the light emitted by the light-emitting modules passes through the optical surface, any one or any multiple of the optical wave phase, optical wave amplitude, and polarization state of the emitted light are modulated, and the light intensity distribution of the emitted light meets the requirements after passing through the first light distribution parts.

3. The spectral synthesis device according to claim 1, wherein On the optical surface, the microstructures are arranged in two dimensions.

4. The spectral synthesis device according to claim 1, wherein Centered on the center of the optical surface and along the radial direction of the optical surface, the shape parameters of the microstructures change in a gradient, in regions, or randomly.

5. The spectral synthesis device according to claim 1, characterized in that The microstructures include columnar protrusions, the cross-sectional dimensions of the columnar protrusions are in the nanoscale, and the height of the columnar protrusions is in the nanoscale.

6. The spectral synthesis device according to claim 5, characterized in that, The cross-section of the columnar protrusion is circular, elliptical, square, trapezoidal, or a polygon with more than four sides.

7. The spectral synthesis device according to claim 1, wherein The first light distribution part includes a layered substrate, and one side surface of the layered substrate is the optical surface.

8. The spectral synthesis device according to any one of claims 1 to 7, characterized in that, The at least two first light distribution parts are integrally formed.

9. The spectral synthesis device according to claim 1, wherein The at least two light-emitting modules include a first light-emitting module, a second light-emitting module, a third light-emitting module, and a fourth light-emitting module, and the first light-emitting module, the second light-emitting module, the third light-emitting module, and the fourth light-emitting module are arranged in a rectangular array and the central wavelengths of the lights emitted by each light-emitting module are different; Or, the at least two light-emitting modules include a first light-emitting module, a second light-emitting module, a third light-emitting module, a fourth light-emitting module, a fifth light-emitting module, and a sixth light-emitting module, and the first light-emitting module, the second light-emitting module, the third light-emitting module, the fourth light-emitting module, the fifth light-emitting module, and the sixth light-emitting module are arranged in a rectangular array; Or, the at least two light-emitting modules include a first light-emitting module, a second light-emitting module, a third light-emitting module, a fourth light-emitting module, a fifth light-emitting module, a sixth light-emitting module, a seventh light-emitting module, and an eighth light-emitting module, and the first light-emitting module, the second light-emitting module, the third light-emitting module, the fourth light-emitting module, the fifth light-emitting module, the sixth light-emitting module, the seventh light-emitting module, and the eighth light-emitting module are arranged in a rectangular array; Or, the at least two light-emitting modules include four rows and four columns of the light-emitting modules arranged in an array form, or the at least two light-emitting modules include five rows and five columns of the light-emitting modules arranged in an array form.

10. The spectral synthesis device according to claim 1, characterized in that, Further comprising: At least one preset light-emitting module for emitting light; At least one second light distribution part, the second light distribution part is correspondingly arranged with the preset light-emitting module and is arranged on the light-emitting side of the preset light-emitting module, the second light distribution part is used for making the light intensity distribution of the emitted light of the preset light-emitting module meet the requirements after passing through the second light distribution part, and the second light distribution part includes a reflector cup or a lens.

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