CN117006425A - Light source module and manufacturing method thereof - Google Patents

Abstract

The embodiment of the application relates to the technical field of optical illumination and discloses a light source module and a manufacturing method thereof, wherein the light source module comprises a light source and an optical film element, the light source is configured to emit illumination light according to an angle perpendicular to a light emitting surface of the light source, the optical film element is attached to the light emitting surface of the light source, the optical film element is configured to modulate the illumination light into a preset angle and/or to emit the illumination light after the preset intensity distribution, the preset angle is an angle which is not perpendicular to the light emitting surface of the light source, and the preset intensity is not the intensity of the illumination light emitted by the light source directly.

Description

Light source module and manufacturing method thereof

Technical Field

The embodiment of the application relates to the technical field of optical illumination, in particular to a light source module and a manufacturing method thereof.

Background

A Light-Emitting Diode (LED) Light source, that is, an LED Light source has advantages of small volume, long life, high efficiency, and the like, and thus is widely used in fields of industrial illumination, home illumination, and the like. Typically, an LED light source has a radiation characteristic as shown in fig. 1, i.e. has a certain divergence angle, but only has its maximum intensity in the main direction of 0 ° as shown in fig. 1, with which directivity different illumination effects can be achieved.

In the process of implementing the embodiment of the present application, the inventor finds that in order to implement angle lighting, a mechanical scheme is adopted in the current mainstream scheme, one common way is to rotate the light emitting direction of the LED light source as shown in fig. 2, such as rotating the angle θ in fig. 2, so as to adjust the relative spatial angle relationship between the LED light source and the object to be illuminated, and another common way is to implement deflection of the light angle by using a reflector. Both of these approaches require additional mechanical changes and costs, especially in machine vision equipment with limited space and compactness, which is an inefficient and costly solution, sometimes even impossible due to the limitation of space position, and the effect of illumination on the light source such as laser is great due to the introduction of optical path difference when the angle of illumination is changed.

Disclosure of Invention

The embodiment of the application provides a light source module and a manufacturing method thereof, which can solve the problems of large volume and high cost of a scheme for mechanically changing the irradiation angle of a light source.

The aim of the embodiment of the application is realized by the following technical scheme:

in order to solve the above technical problems, in a first aspect, an embodiment of the present application provides a light source module, including: a light source configured to emit illumination light at an angle perpendicular to a light-emitting surface of the light source; the optical film element is attached to the light emitting surface of the light source and is configured to modulate the illumination light to a preset angle and/or a preset intensity distribution and then emit the illumination light, wherein the preset angle is an angle meeting the polishing requirement, and the preset intensity is an intensity meeting the polishing requirement.

In some embodiments, the light emitting surface of the light source includes a plurality of sub-regions, the surfaces of the optical film elements attached to the plurality of sub-regions have different film microstructures, the different film microstructures correspond to the different sub-regions, and the different film microstructures have diffraction angles corresponding to the sub-regions.

In some embodiments, the optical film elements attached to the plurality of sub-regions are configured to modulate the illumination light into illumination light with different diffraction angles and then emit the illumination light; and/or the optical film elements attached to the plurality of subareas are configured to modulate the illumination light into illumination light with different illumination intensities and then emit the illumination light so as to adjust the illumination distribution of the illumination light output by the light source module.

In some embodiments, when the light source is an AOI annular light source, the AOI annular light source is provided with an annular LED array along a diameter direction, and part or all of the annular LED array is attached with the optical film element.

In some embodiments, the annular LED array includes an annular red LED array, an annular green LED array, and an annular blue LED array, the optical thin film element is attached to the surfaces of the annular red LED array and the annular blue LED array, the optical thin film element attached to the annular red LED array and the optical thin film element attached to the annular blue LED array have different thin film microstructures, the different thin film microstructures have different diffraction angles, and the light source module is configured to make uniform the light flux emitted to the illuminated test plate through the AOI annular light source and the optical thin film element.

In some embodiments, when the light source is a planar light source, the size of the planar light source and the size of the illuminated board to be measured have a certain ratio, the surface of the planar light source includes a first area with an illumination main direction perpendicular to the illuminated board to be measured, and a second area with an illumination main direction not perpendicular to the illuminated board to be measured, the optical thin film element attached to the first area and the optical thin film element attached to the second area have different thin film microstructures, the different thin film microstructures have different diffraction angles, and the light source module is configured to make luminous fluxes exiting from the planar light source and the optical thin film element to the illuminated board to be measured consistent.

In some embodiments, the light source further comprises: the optical film element is attached to the transparent diffusion plate, and the transparent diffusion plate is fixedly arranged on the light emitting side of the light source.

In order to solve the above technical problems, in a second aspect, an embodiment of the present application provides a method for manufacturing a light source module, where the method includes: acquiring the lighting main direction and the lighting demand angle of the light source; judging whether the included angle between the lighting main direction of the light source and the lighting demand angle exceeds a preset angle threshold value or not; if so, attaching an optical film element to the light source to manufacture the light source module according to the first aspect.

In some embodiments, prior to affixing an optical film element to the light source, the method further comprises: acquiring an angle difference value between the lighting main direction of the light source and the lighting demand angle; and acquiring an optical film element conforming to the angle difference, wherein the optical film element is configured to modulate the illumination direction of the LED lamp beads with the specified wavelength in the light source into a lighting demand angle.

In some embodiments, the light source is an LED area light source, the LED area light source includes a plurality of sub-areas, and when the light angles of the plurality of sub-areas of the LED area light source are inconsistent, before the optical film element is attached to the light source, the method further includes: acquiring the light angle of each sub-area in a plurality of sub-areas; and acquiring an optical film element capable of adjusting the light angle of each subarea to a lighting requirement angle according to the light angle of each subarea.

Compared with the prior art, the application has the beneficial effects that: in contrast to the situation of the prior art, the embodiment of the application provides a light source module and a manufacturing method thereof, the light source module comprises a light source and an optical film element, the light source is configured to emit illumination light according to an angle perpendicular to a light emitting surface of the light source, the optical film element is attached to the light emitting surface of the light source, the optical film element is configured to modulate the illumination light to a preset angle and/or to emit the illumination light after the preset intensity distribution, wherein the preset angle is an angle meeting the lighting requirement, and the preset intensity is an intensity meeting the lighting requirement.

Drawings

One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements/modules, and in which the figures are not to be taken in a limiting sense, unless expressly stated otherwise.

FIG. 1 is a radiation pattern of an LED light source;

FIG. 2 is a block diagram of a prior art light source;

fig. 3 is a schematic structural diagram of a light source module according to an embodiment of the present application;

fig. 4 is a diagram illustrating a structure of three light sources in a light source module according to an embodiment of the present application;

FIG. 5 is a block diagram of another conventional light source;

fig. 6 is a schematic structural diagram of another light source module according to an embodiment of the present application;

FIG. 7 is a schematic diagram of a light source module when the light source provided by the embodiment of the application is an AOI annular light source;

FIG. 8 is a schematic view of the optical path and the angle of view of the output light of the light source module before and after the film lamination when the light source provided by the embodiment of the application is an AOI annular light source;

FIG. 9 is a schematic view of a conventional area light source and an illuminated test panel;

fig. 10 is a schematic structural diagram of a light source module and an irradiated board to be tested according to an embodiment of the present application;

FIG. 11 is a graph of the illumination uniformity versus various points on the illuminated panel of FIG. 10;

fig. 12 is a flowchart of a method for manufacturing a light source module according to an embodiment of the present application;

fig. 13 is a flowchart illustrating a method for manufacturing a light source module according to another embodiment of the present application;

fig. 14 is a flowchart of a method for manufacturing a light source module according to another embodiment of the application.

Detailed Description

The present application will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the present application, but are not intended to limit the application in any way. It should be noted that variations and modifications could be made by those skilled in the art without departing from the inventive concept. These are all within the scope of the present application.

The present application will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present application more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.

It should be noted that, if not in conflict, the features of the embodiments of the present application may be combined with each other, which is within the protection scope of the present application. In addition, although functional block division is performed in the device schematic, in some cases, block division may be different from that in the device.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and/or" as used in this specification includes any and all combinations of one or more of the associated listed items.

In addition, the technical features of the embodiments of the present application described below may be combined with each other as long as they do not collide with each other.

In order to solve the problem that in the existing mechanical scheme for changing the light source irradiation angle, a mechanical structure with larger volume is generally required to adjust the light source irradiation angle, the embodiment of the application provides a light source module and a manufacturing method thereof, and the light source module can realize multi-angle illumination by directly attaching an optical film element on the surface of a light source without changing the mechanical size and the position angle of the original light source or adding a reflecting mirror.

In particular, embodiments of the present application are further described below with reference to the accompanying drawings.

Referring to fig. 3, the embodiment of the present application provides a light source module 10, which shows a structure of the light source module 10 provided by the embodiment of the present application, wherein a rectangular portion is a light source 11 or a part of the light source 11, an arrow indicates a main direction of light beam propagation, and the light source module 10 includes: a light source 11 and an optical film element 12.

The light source 11 is configured to emit illumination light L1 at an angle perpendicular to the light-emitting surface of the light source 11. In view of the shape of the light source 11, please refer to fig. 4, which illustrates three light sources provided in the embodiment of the present application: as shown in the left diagram of fig. 4, the light source 11 may be an AOI ring light source, which outputs red, green and blue light through ring-shaped LED beads, respectively. Alternatively, as shown in the middle or right side view of fig. 4, the light source 11 may be a planar light source or an inclined light source.

And, from the light-emitting type of the light source 11, the light source 11 may be an LED light source, where the LED light source is composed of a plurality of light emitting diode light beads uniformly arranged, and the plurality of light emitting diodes are white light diodes, or red light diodes, blue light diodes and green light diodes that are periodically and uniformly arranged, or the plurality of light emitting diodes are monochromatic light diodes. Alternatively, the light source 11 may be a laser surface light source, which is a monochromatic laser light source. Specifically, the light source 11 adopts monochromatic light, polychromatic light or white light, and can be selected and set according to actual needs, which is not limited by the embodiment of the present application.

The optical thin film element 12 is attached to the light emitting surface of the light source 11, and the optical thin film element 12 is configured to modulate the illumination light L1 to a preset angle α and/or a preset intensity distribution, where the preset angle α is an angle that satisfies the lighting requirement, and the preset intensity is an intensity that satisfies the lighting requirement, for example, the preset angle α may be an angle that is not perpendicular to the light emitting surface of the light source 11, and the preset intensity may be an intensity of the illumination light that is not directly emitted by the light source 11. As shown in fig. 3, the illumination light L1 is adjusted to a light beam L2 having a preset angle α with the illumination light L1 and then output. Specifically, the type of the optical thin film element 12 can be selected according to the structural design of the light source module 10 and the requirement of the light emitting angle of the illumination light, and the optical thin film element 12 with different structures can realize the output of the illumination light with different angles, which is not limited by the embodiment of the present application and the limitation of fig. 1.

In the embodiment of the present application, as shown in fig. 3, by attaching a layer of optical thin film element 12 on the light-emitting surface of the light source 11, the irradiation angle of the light source can be changed by optical means on the premise of increasing a large-volume and large-size mechanical structure, unlike the conventional mechanical method of realizing illumination at different angles by changing the mechanical angle of the light source as shown in fig. 2. The light source module 10 provided by the embodiment of the application has the advantages of miniaturization and simplification in structure, and can be realized by replacing the optical film element 12 with different structures for different illumination angles and illumination intensities, so that the light source module has design flexibility and precise control. In addition, the optical thin film element 12 is adopted to realize the angle deflection of the light rays, and no extra optical path difference is introduced, so that the light source 11 can also select a light source with stronger coherence, such as a laser light source, and the influence of the optical path difference on the uniformity of the light beam is avoided.

In some embodiments, please refer to fig. 5, which illustrates the structure of another conventional light source, as shown in fig. 5, when the conventional light source needs to output light with multiple angles at the same time, the light source 11 needs to be divided into multiple areas, and a certain included angle needs to be arranged between the different areas, or multiple light sources 11 are adopted, and a certain included angle needs to be arranged between the different light sources 11, so as to provide a more complex light source capable of outputting light beams with multiple angles.

Unlike the prior art solution of fig. 5, the present application can provide a customizable complex multi-angle light source by providing different configurations of the optical film elements 12 on different areas of the light source 11. Specifically, the light emitting surface of the light source 11 includes a plurality of sub-areas, the number of the optical thin film elements 12 is the same as the number of the sub-areas of the light emitting surface of the light source 11, each optical thin film element 12 is attached to the light emitting surface of the light source 11, the surfaces of the optical thin film elements 12 attached to the plurality of sub-areas have different thin film microstructures, the different thin film microstructures correspond to the different sub-areas, and the different thin film microstructures have diffraction angles corresponding to the sub-areas, so that when the light rays with the same incident angle pass through the optical thin film elements 12 of the different sub-areas, the light rays can be emitted at different diffraction angles, and have different diffraction effects, so that the light ray angles of the different sub-areas can be changed. The optical thin film element 12 includes a substrate film and different epitaxial films, the substrate film is attached to the light-emitting surface of the light source, the epitaxial films are films with different diffraction angles grown on the substrate film by epitaxy, or are films with different diffraction angles attached to the substrate film, in this embodiment, the epitaxial films are film microstructures, and the positions of the epitaxial films correspond to the subregions of the light source 11.

The optical thin film elements 12 attached to the plurality of sub-regions are arranged to modulate the illumination light L1 into illumination light having different diffraction angles and then emit the illumination light. And/or the optical film elements 12 attached to the sub-areas are configured to modulate the illumination light into illumination light with different illumination intensities and then emit the illumination light, so as to adjust the illumination distribution of the illumination light output by the light source module 10.

Referring to fig. 6, which shows a structure of another light source module 10 according to an embodiment of the present application, in the example shown in fig. 6, the light emitting surface of the light source 11 includes 3 sub-areas 11a, 11b, 11c, and the number of the optical film elements 12 is also three. The optical film elements 12a, 12b, 12c respectively attached to the 3 sub-areas 11a, 11b, 11c are configured to modulate the illumination light L1 into illumination light L2a, L2b, L2c having three different angles, and then emit the illumination light; and/or, the optical film elements 12a, 12b, 12c respectively attached to the 3 sub-areas 11a, 11b, 11c are further configured to modulate the illumination light L1 into illumination light L2a, L2b, L2c with different illumination intensities and then emit the illumination light, so as to adjust the illumination distribution of the illumination light output by the light source module 10.

In the example shown in fig. 6, the output illumination light is concentrated, and the modulated illumination light L2a, L2b, L2c is concentrated and output in one direction, and in other embodiments, the modulated illumination light L2a, L2b, L2c may be divergent light, or a combination of light beams in other directions, which may be specifically set according to actual needs, without restricting to the limitation of the embodiments of the present application.

In some embodiments, the light source 11 may also be an AOI annular light source, and when the light source 11 is an AOI annular light source, the AOI annular light source is provided with an annular LED array along a diameter direction, and the annular LED array is partially or entirely attached with the optical film element 12. Referring to fig. 7 together, the structure of a light source module is shown when the light source 11 provided in the embodiment of the present application is an AOI annular light source, at this time, the annular LED array includes an annular red LED array, an annular green LED array and an annular blue LED array, the AOI annular light source includes an annular red (R) LED array, an annular green (G) LED array and an annular blue (B) LED array sequentially arranged from inside to outside along a diameter direction, at this time, optical thin film elements 12 are attached to surfaces of the annular red LED array and the annular blue LED array, the optical thin film elements attached to the annular red LED array and the optical thin film elements 12 attached to the annular blue LED array have different thin film microstructures, the different thin film microstructures have different diffraction angles, and the light source module is configured so that light fluxes emitted onto a board to be measured through the AOI annular light source and the optical thin film elements 12 are consistent. The AOI ring light source in fig. 7 is exemplified by an example including an annular red (R) LED array, an annular green (G) LED array, and an annular blue (B) LED array which are sequentially arranged from the inside to the outside in the diameter direction, and in other embodiments, the annular LED arrays constituting the AOI ring light source may be a combination of LED arrays of other wavelengths and colors, and may be specifically designed according to actual needs.

Also, please refer to fig. 8, which illustrates the light path and the angle of view of the output light of the light source module before and after the film is attached when the light source 11 is an AOI annular light source, wherein the solid line is the light path before the AOI annular light source 11 is attached with the optical film element 12 and the obtained angle of view FOV, and the dotted line is the light path after the annular light source 11 is attached with the optical film element 12 and the obtained angle of view FOV, and it is easy to see that the optical film element 12 capable of adjusting the corresponding wavelength or the optical film element 12 with different diffraction angles is attached to the wavelengths of the three colors of red R, green G, and blue B light, so that the range of the angle of view FOV of the whole AOI annular light source 11 can be reduced and the uniformity of illumination can be improved.

Further, as for the annular red (R) LED array, the annular green (G) LED array, and the annular blue (B) LED array, it is clear from the solid-line optical path of fig. 8 that the two wavelengths, mainly red light and blue light, have a large influence on the range of the field angle FOV of the entire AOI annular light source 11, and therefore, it is also possible to attach an optical film only for the annular red LED array and the annular blue LED array, and to achieve deflection of the light angles of the two wavelengths, so as to reduce the range of the field angle FOV of the AOI annular light source 11. Specifically, the optical thin film element attached to the annular red LED array and the optical thin film element attached to the annular blue LED array have different diffraction angles, and the light source module is configured to make uniform the luminous flux emitted to the illuminated test plate through the AOI annular light source and the optical thin film element 12.

In some embodiments, the light source 11 may also be a planar light source, please refer to fig. 9, which shows the structure of the existing surface light source and the illuminated board to be measured, when the planar light source is applied to the AOI device, in order to reduce the size of the AOI device, the conventional manner is to set mirrors on two sides to perform reflection compensation as shown in fig. 9, so that the distance between the surface light source and the illuminated board to be measured can be shortened, and the light emitted from two sides of the surface light source, which cannot be originally illuminated to the illuminated board to be measured, can be fully utilized, so that the light path turns and is then illuminated to the illuminated board to be measured.

The present application adjusts the light angle by attaching the optical film element 12 to the light source 11, so that the light at two ends of the light source 11 can perform light compensation on the illuminated board 13 to be measured, as shown in fig. 10, the surface attached to the planar light source includes a first area 11d with a main illumination direction perpendicular to the illuminated board 13 to be measured, and a second area 11e with a main illumination direction not perpendicular to the illuminated board 13 to be measured, the optical film element 12d attached to the first area 11d and the optical film element 12e attached to the second area 11e have different film microstructures, the different film microstructures have different diffraction angles, and the light source module is configured to make the luminous flux emitted to the illuminated board to be measured through the planar light source 11 and the optical film element 12 consistent. The optical film element 12e on the second area 11e can deflect the light, so that the light is converged and irradiated onto the irradiated to-be-measured plate 13, and uniformity of luminous fluxes at different points on the irradiated to-be-measured plate 13 is improved.

Preferably, when the light source 11 is a planar light source, the size of the planar light source and the size of the illuminated board to be measured has a certain ratio, for example, in fig. 9, the ratio of the size of the planar light source and the size of the illuminated board to be measured is 2:1, when the ratio relation is satisfied, the illumination uniformity is optimal, and at this time, the luminous flux of each point on the board to be measured is normally distributed at the position (i.e. the point position) of the corresponding point on the surface light source, wherein the relation between the point position and the illumination uniformity can be shown in fig. 11.

The embodiment of the application provides that the various light source modules 10 can be applied to lighting equipment, such as AOI equipment, and compared with the existing mechanical direction-adjustable light source, the light source module 10 provided by the embodiment of the application has smaller size in terms of size space, and can be realized by only replacing different types of optical films when different illumination directions are needed.

Further, if it is necessary to further improve the uniformity of the output illumination light, the light source 11 may further include a transparent diffusion plate, and the optical film element 12 is attached to the transparent diffusion plate, and the transparent diffusion plate is fixedly disposed on the light emitting side 11 of the light source. A transparent diffusion plate is attached to the surface of the light source 11 to diffuse the light beam and output the diffused light beam, thereby obtaining uniform illumination light. Still further, in order to achieve adjustment of the larger light emitting direction, a mechanical structure may be further provided and the light source module 10 is fixed on the mechanical structure to adjust the direction and/or position of the light source module 10. Still further, in order to achieve adjustment of a larger light emitting direction, a plurality of light source modules 10 may be provided to achieve coverage of a more angular range.

The embodiment of the application also provides a manufacturing method of the light source module, please refer to fig. 12, which shows a flow of the manufacturing method of the light source module, the method includes but is not limited to the following steps:

step S10: acquiring the lighting main direction and the lighting demand angle of the light source;

in the embodiment of the application, firstly, the required angle of the light source and the main illumination direction of the current light source are required to be obtained based on the lighting requirement, wherein the optical film element is configured to modulate the illumination light into a preset angle and/or a preset intensity distribution and then emit the illumination light, and the preset angle is equal to or close to the lighting requirement angle and can be set according to the actual lighting requirement.

Step S20: judging whether the included angle between the main illumination direction of the light source and the lighting demand angle exceeds a preset angle threshold value or not; if yes, jumping to step S30;

then, whether the included angle between the illumination main direction of the light source and the lighting demand angle exceeds a preset angle threshold value is required to be judged, if so, the fact that the illumination main direction of the current light source is inconsistent with the lighting demand angle is indicated, and the step S30 is required to be skipped to adjust the illumination main direction of the light source; if the angle is not exceeded, the current main direction of illumination of the light source is basically consistent with the lighting demand angle within the error range, and the main direction of illumination of the light source is not required to be adjusted. The preset angle threshold value can be set according to the accuracy requirement of the actual illumination direction of the light source.

Step S30: an optical film element is attached to the light source to manufacture a light source module.

When the illumination main direction of the light source is inconsistent with the lighting demand angle, a thin film optical element is required to be attached to the surface of the light source to assist in light path modification, so that the structure of the light source module provided by the embodiment of the application is obtained. Specifically, an optical film element which accords with the included angle between the illumination main direction of the light source and the lighting demand angle is attached to the surface of the light source, so that the current illumination main direction of the light source is consistent with the lighting demand angle, and the auxiliary modification of the light path is realized.

Further, please refer to fig. 13, which illustrates a flow chart of another manufacturing method of a light source module according to an embodiment of the present application, before an optical film element is attached to a light source, the method further includes:

step S41: acquiring an angle difference value between the illumination main direction of the light source and the lighting demand angle;

step S42: and obtaining an optical film element conforming to the angle difference, wherein the optical film element is configured to modulate the illumination direction of the LED lamp beads with the specified wavelength in the light source into a lighting requirement angle.

In the embodiment of the application, the included angle between the illumination main direction of the light source and the lighting demand angle, namely the angle difference value, can be used for obtaining the optical film element conforming to the angle difference value for adjusting the illumination main direction of the light source module, so that the illumination main direction is consistent with the lighting demand angle after being adjusted by the optical film element. Specifically, to realize the auxiliary modification of the optical film element to the optical path, the film microstructure of the optical film element can be designed according to the included angle between the illumination main direction of the light source and the required angle of polishing, so that the illumination main direction is consistent with the required angle of polishing after the light source is attached to the optical film element.

The optical thin film element is further required to be selected according to the wavelength of the LED light beads, so that the illumination direction of the LED light beads with the specified wavelength in the light source can be modulated to be a lighting requirement angle, that is, the optical thin film element is arranged as an optical device capable of deflecting the light with the specified wavelength to adjust the wavelength of the light source, so that the light with the corresponding wavelength is deflected at the required angle based on the optical thin film element, and the light path modification is assisted.

Further, referring to fig. 14, a process of a method for manufacturing a light source module according to an embodiment of the present application is shown, wherein the light source is an LED area light source, the LED area light source includes a plurality of sub-areas, and when light angles of the plurality of sub-areas of the LED area light source are inconsistent, before an optical film element is attached to the light source, the method further includes:

step S51: acquiring the light angle of each sub-area in a plurality of sub-areas;

step S52: and acquiring an optical film element capable of adjusting the light angle of each subarea to a lighting requirement angle according to the light angle of each subarea.

In the embodiment of the application, when the light source is a complex light source such as an LED area light source, the LED area light source can be further divided into a plurality of sub-areas, the light angle of each sub-area of the complex light source is obtained, different optical film elements are attached to the light source corresponding to the light angle of each sub-area, and the positions of the multi-angle optical film elements corresponding to each sub-area are respectively set to different angles so as to assist each sub-area in the light source to modify the light path of the lamp bead.

The embodiment of the application provides a light source module and a manufacturing method thereof, the light source module comprises a light source and an optical film element, the light source is configured to emit illumination light according to an angle perpendicular to a light emitting surface of the light source, the optical film element is attached to the light emitting surface of the light source, the optical film element is configured to modulate illumination light to a preset angle and/or preset intensity distribution and then emit the illumination light, wherein the preset angle is an angle which is not perpendicular to the light emitting surface of the light source, and the preset intensity is not the intensity of the illumination light emitted by the light source directly.

It should be noted that the above-described apparatus embodiments are merely illustrative, and that elements illustrated as separate elements may or may not be physically separate, and elements shown as elements may or may not be physically separate, may or may not be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and are not limiting; combinations of features of the above embodiments or in different embodiments are possible within the spirit of the application and there are many other variations of the different aspects of the application as above, which are not provided in detail for the sake of brevity; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the application.

Claims (10)

1. A light source module, comprising:

a light source configured to emit illumination light at an angle perpendicular to a light-emitting surface of the light source;

the optical film element is attached to the light emitting surface of the light source and is configured to modulate the illumination light to a preset angle and/or a preset intensity distribution and then emit the illumination light, wherein the preset angle is an angle meeting the polishing requirement, and the preset intensity is an intensity meeting the polishing requirement.

2. The light source module of claim 1, wherein the light source module comprises a light source module,

the light-emitting surface of the light source comprises a plurality of sub-areas, the surfaces of the optical film elements attached to the sub-areas are provided with different film microstructures, the different film microstructures correspond to the different sub-areas, and the different film microstructures are provided with diffraction angles corresponding to the sub-areas.

3. The light source module of claim 2, wherein the light source module comprises,

the optical film elements attached to the plurality of subareas are configured to modulate the illumination light into illumination light with different diffraction angles and then emit the illumination light;

and/or the number of the groups of groups,

the optical film elements attached to the plurality of sub-areas are configured to modulate the illumination light into illumination light with different illumination intensities and then emit the illumination light, so as to adjust the illumination distribution of the illumination light output by the light source module.

4. A light source module as recited in any one of claims 1 to 3, wherein,

when the light source is an AO I annular light source, an annular LED array is arranged on the AO I annular light source along the diameter direction, and the optical film element is partially or completely stuck to the annular LED array.

5. The light source module of claim 4, wherein the light source module comprises a light source module,

the annular LED array comprises an annular red LED array, an annular green LED array and an annular blue LED array, the optical thin film elements are adhered to the surfaces of the annular red LED array and the annular blue LED array, the optical thin film elements adhered to the annular red LED array and the optical thin film elements adhered to the annular blue LED array have different thin film microstructures, the different thin film microstructures have different diffraction angles, and the light source module is configured to enable luminous fluxes emitted to an irradiated plate to be consistent through the AOI annular light source and the optical thin film elements.

6. A light source module as recited in any one of claims 1 to 3, wherein,

when the light source is a planar light source, the size of the planar light source and the size of the illuminated board to be measured have a certain proportion,

the surface of the planar light source comprises a first area with the main direction of illumination perpendicular to the illuminated board to be measured and a second area with the main direction of illumination not perpendicular to the illuminated board to be measured,

the optical film element attached to the first area and the optical film element attached to the second area have different film microstructures, different film microstructures have different diffraction angles, and the light source module is configured to enable luminous fluxes emitted to the irradiated plate to be measured through the planar light source and the optical film element to be consistent.

7. The light source module of claim 1, wherein the light source module comprises a light source module,

the light source further comprises: the optical film element is attached to the transparent diffusion plate, and the transparent diffusion plate is fixedly arranged on the light emitting side of the light source.

8. The manufacturing method of the light source module is characterized by comprising the following steps:

acquiring the lighting main direction and the lighting demand angle of the light source;

judging whether the included angle between the lighting main direction of the light source and the lighting demand angle exceeds a preset angle threshold value or not;

if so, attaching an optical film element to the light source to manufacture the light source module according to any one of claims 1-7.

9. The method of claim 8, wherein,

before attaching the optical film element to the light source, the method further comprises:

acquiring an angle difference value between the lighting main direction of the light source and the lighting demand angle;

and acquiring an optical film element conforming to the angle difference, wherein the optical film element is configured to modulate the illumination direction of the LED lamp beads with the specified wavelength in the light source into a lighting demand angle.

10. The method of claim 8, wherein,

the light source is an LED area light source, the LED area light source comprises a plurality of sub-areas, and when the light angles of the plurality of sub-areas of the LED area light source are inconsistent, before the optical film element is attached to the light source, the method further comprises:

acquiring the light angle of each sub-area in a plurality of sub-areas;

and acquiring an optical film element capable of adjusting the light angle of each subarea to a lighting requirement angle according to the light angle of each subarea.