CN109555998B - Plane coaxial light source - Google Patents
Plane coaxial light source Download PDFInfo
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- CN109555998B CN109555998B CN201811495258.8A CN201811495258A CN109555998B CN 109555998 B CN109555998 B CN 109555998B CN 201811495258 A CN201811495258 A CN 201811495258A CN 109555998 B CN109555998 B CN 109555998B
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- 238000002834 transmittance Methods 0.000 claims abstract description 13
- 230000017525 heat dissipation Effects 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 3
- 238000005259 measurement Methods 0.000 abstract description 7
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000001514 detection method Methods 0.000 description 9
- 238000005286 illumination Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 230000000007 visual effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000002310 reflectometry Methods 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S2/00—Systems of lighting devices, not provided for in main groups F21S4/00 - F21S10/00 or F21S19/00, e.g. of modular construction
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V19/00—Fastening of light sources or lamp holders
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
- F21V29/50—Cooling arrangements
- F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
- F21V29/74—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
- F21V29/76—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical parallel planar fins or blades, e.g. with comb-like cross-section
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V5/00—Refractors for light sources
- F21V5/02—Refractors for light sources of prismatic shape
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V5/00—Refractors for light sources
- F21V5/04—Refractors for light sources of lens shape
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V7/00—Reflectors for light sources
- F21V7/04—Optical design
- F21V7/06—Optical design with parabolic curvature
Abstract
The plane coaxial light source comprises a light splitting group consisting of N light splitting surfaces which are arranged in parallel and a parallel light component positioned at one side of the light splitting group, wherein the parallel light component is used for emitting parallel light to the light splitting group; the incidence angle of the parallel light on the light splitting surface is 45 degrees, the height of the light splitting surface in the direction perpendicular to the incidence direction of the parallel light is equal to the distance between two adjacent light reflecting surfaces in the incidence direction of the parallel light, the height of the light splitting surface in the direction perpendicular to the incidence direction of the parallel light is equal to the beam height H of the parallel light, the beam height H of the parallel light and the length L of an object to be detected in the incidence direction of the parallel light meet the relation that N is equal to or more than H and equal to L, and N is equal to or more than 2; the N light splitting surfaces are sequentially numbered as N-1 along the incidence direction of parallel light, and the reflectance Rn and the transmittance Tn of the nth light splitting surface meet the following conditions: r is R n ＝R (n‑1) *T (n‑1) ,T n ＝1‑R n ,R 1 ＝0.5,T 1 =0.5. The invention can effectively reduce the height of the plane coaxial light source, reduce the whole volume of the light source and is beneficial to improving the measurement precision.
Description
Technical Field
The invention relates to the technical field of visual detection and image measurement, in particular to a plane coaxial light source for a visual detection and image measuring instrument.
Background
In the field of vision detection and image measurement technology, coaxial illumination is an important illumination mode, and the coaxial illumination can provide illumination light which is very uniform and coaxial with the optical axis of the image acquisition device. A typical light path of the existing coaxial illumination light source is shown in fig. 1, a collimated parallel light beam enters the half mirror at an angle of 45 degrees, a part of light is deflected by 90 degrees and then vertically irradiates to an object to be measured, the light which is reflected by the object to be measured and carries object surface information reaches the half mirror again, and a part of light is transmitted into a lens or a detector above the half mirror to finish the measurement of the object surface.
The main disadvantages of this light path are: the height H of the parallel beam and the dimension L of the object to be measured must satisfy H.gtoreq.L, which results in two main problems: 1. when the dimension L of the object to be detected is large, the height H of the parallel light beam is too high, so that the height of the coaxial light source and the whole volume of the detection system are too large; 2. when the coaxial light source is huge in size, the distance between the lens and an object to be measured can be increased, and under the condition that the focal length of the detection lens is limited, the object cannot be clearly imaged on the detection surface, so that the measurement accuracy is affected.
Disclosure of Invention
The invention provides a plane coaxial light source, which effectively reduces the height of the plane coaxial light source, reduces the whole volume of the light source and is beneficial to improving the measurement accuracy.
The invention provides a plane coaxial light source, which comprises a light splitting group consisting of N light splitting surfaces which are arranged in parallel and a parallel light component positioned at one side of the light splitting group, wherein the parallel light component is used for emitting parallel light to the light splitting group; the incidence angle of the parallel light on the light splitting surface is 45 degrees, the height of the light splitting surface in the direction perpendicular to the incidence direction of the parallel light is equal to the distance between two adjacent light reflecting surfaces in the incidence direction of the parallel light, the height of the light splitting surface in the direction perpendicular to the incidence direction of the parallel light is equal to the beam height H of the parallel light, the beam height H of the parallel light and the length L of an object to be detected in the incidence direction of the parallel light meet the relation that N is equal to or more than H and equal to L, and N is equal to or more than 2; the N light splitting surfaces are sequentially numbered as N-1 along the incidence direction of the parallel light, and the reflection ratio R of the nth light splitting surface (n) And transmittance T (n) The following conditions are satisfied: r is R n ＝R (n-1) *T (n-1) ,T n ＝1-R n ,R 1 ＝0.5,T 1 ＝0.5。
Preferably, the parallel light assembly comprises a light source and a collimation mechanism, and light emitted by the light source is collimated by the collimation mechanism and then emitted to the light splitting group.
Preferably, the collimation mechanism comprises a bottom plate and a reflecting surface, wherein the bottom plate is arranged in parallel with the incidence direction of parallel light, the reflecting surface is arranged above the bottom plate, the reflecting surface is in an off-axis parabolic shape, and the light source is fixed on the bottom plate and is positioned on the focus of the reflecting surface.
Preferably, the collimation mechanism comprises a bottom plate and a reflecting surface, wherein the bottom plate is arranged in parallel with the incidence direction of parallel light, the reflecting surface is covered on the bottom plate and is provided with a first off-axis paraboloid positioned above the bottom plate and a second off-axis paraboloid positioned below the bottom plate, the upper surface of the bottom plate is fixedly provided with a first light source, the first light source is positioned on the focus of the first off-axis paraboloid, and the lower surface of the bottom plate is fixedly provided with a second light source, and the second light source is positioned on the focus of the second off-axis paraboloid.
Preferably, the optical splitter further comprises a prism group formed by N-1 parallelogram prisms which are sequentially arranged and right trapezoid prisms which are respectively positioned at two ends of the N-1 parallelogram prisms which are sequentially arranged, wherein the inclined planes of the right trapezoid prisms are glued with the inclined planes of the adjacent parallelogram prisms and the inclined planes of the adjacent two parallelogram prisms to form the light splitting surface; the outer side of one right trapezoid prism is fixed with the shell, the parallel light component is arranged in the shell, and parallel light emitted by the parallel light component is emitted into the prism group from the plane of the right trapezoid prism fixed with the shell.
Preferably, the parallelogram prism and the right trapezoid prism are the same in material.
Preferably, the outer surface of the prism group is plated with an antireflection film.
Preferably, the housing is fixed to the outside of the prism group and disposed around the prism group.
Preferably, the shell is further provided with a heat dissipation structure.
Preferably, the heat dissipation structure is a plurality of heat dissipation plates arranged on the surface of the shell.
In the invention, one part of the parallel light is split and reflected to the surface of the object to be measured through the splitting surface, and the other part of the parallel light irradiates to the next splitting surface through the splitting surface, and the reflection ratio and the transmittance of the splitting surface change according to a preset rule, so that the light reflected from the splitting surface is kept uniform, and uniform coaxial light is provided. Because the beam height H of the parallel light and the length L of the object to be measured in the incidence direction of the parallel light meet the condition that N is equal to or greater than L, the lens system and the beam height are not required to be set to be equal to the size of the object to be measured, the height of the planar coaxial light source can be greatly reduced, and the volume of the whole structure is reduced. Because the height of the plane coaxial light source is reduced, the distance between the lens and the object to be measured can be shortened in the measuring process, the adjusting range of the focal length of the lens is enlarged, and the detection precision can be assisted to be improved.
Meanwhile, the final light source system efficiency is N x R N *T N When N is greater than 1, compare in traditional 25% light source efficiency, the system efficiency of this application just is higher than current coaxial light source efficiency, has played the effect that improves light source system efficiency.
Drawings
FIG. 1 is a schematic view of an optical path of a planar coaxial light source according to the prior art;
FIG. 2 is a schematic view of a planar coaxial light source according to an embodiment of the present invention;
FIG. 3 is a schematic view of a planar coaxial light source according to another embodiment of the present invention;
FIG. 4 is a schematic diagram of a parallelogram prism according to one embodiment of the present invention;
FIG. 5 is a schematic view of a right angle trapezoidal prism according to an embodiment of the present invention;
FIG. 6 is a schematic view of a planar coaxial light source according to an embodiment of the present invention;
FIG. 7 is an enlarged partial schematic view of a collimation mechanism according to an embodiment of the invention;
FIG. 8 is a schematic diagram of a collimation mechanism according to an embodiment of the present invention;
fig. 9 is an enlarged partial schematic view of a collimation mechanism according to an embodiment of the present invention.
Detailed Description
The term "equal" or "identical" as used herein refers to equal or identical in consideration of reasonable errors, and not to equal or identical in absolute terms. The reflectance and transmittance values determined herein are made in view of the loss of light in the medium and the reasonable error. The invention will be described in further detail below with reference to the drawings by means of specific embodiments.
The embodiment of the invention provides a planar coaxial light source, as shown in fig. 2, which comprises a light splitting group consisting of N light splitting surfaces 10 arranged in parallel and a parallel light component 20 positioned at one side of the light splitting group, wherein N is more than or equal to 2, and the N is naturally an integer. The parallel light assembly 20 is configured to emit parallel light to the spectral group. Since fig. 2 is a sectional view showing only the sectional shape, the parallel light is not a single line light source, which extends in the direction perpendicular to the paper surface, is a planar light beam, and the cross section of the light beam may be rectangular. In the same way, the light-splitting plane 10 also extends in a direction perpendicular to the plane of the paper, and may have a rectangular shape. The light splitting surface 10 has a light splitting effect, and can reflect a part of light or transmit a part of light.
The incidence angle of the parallel light on the light splitting surface 10 is 45 degrees, and the reflected emitted light is perpendicular to the parallel light so as to be coaxially irradiated to the surface of the object to be measured. The height of the light splitting surface 10 in the direction perpendicular to the incident direction of the parallel light is equal to the distance between two adjacent light reflecting surfaces 10 in the incident direction of the parallel light, and since the incident angle is 45 degrees, it can be understood that the length of the light splitting surface 10 in the figure is twice the distance between the other light splitting surface adjacent thereto. Meanwhile, the height of the light splitting surface 10 in the direction perpendicular to the incidence direction of the parallel light is equal to the beam height H of the parallel light, so that no gap exists in the vertical projection of the two adjacent light splitting surfaces 10, and the reflected light cannot be broken between the two light splitting surfaces, thereby forming continuous surface reflected light.
The relation of the beam height H of the parallel light and the length L of the object to be measured in the incidence direction of the parallel light is satisfied with N x H being larger than or equal to L, and the range of the reflected light covering the length direction of the object to be measured is ensured. Because the surface of the object to be measured is a planar structure, the length of the light splitting surface 10 in the direction perpendicular to the paper surface and the length of the parallel light in the direction perpendicular to the paper surface should be set to be equal to or greater than the width of the object to be measured, so that the illumination can just cover the upper surface of the object to be measured for detection by a lens or a detector. Since the parallel light sequentially passes through each of the light splitting surfaces 10, a part of the light is attenuated after being reflected by the light splitting surfaces 10, the reflectance and transmittance of the light splitting surfaces 10 should be changed according to a predetermined rule, so that the illuminance of the light reflected by each of the light splitting surfaces 10 is maintained uniform, to achieve uniform illumination.
In this embodiment, the N light splitting surfaces are numbered N-1 sequentially along the incident direction of the parallel light, as shown in fig. 2, the light splitting surface 10 located at the leftmost side is numbered 1, and the light splitting surface located at the rightmost side is numbered N. Reflectance R of nth light splitting surface (n) And transmittance T (n) The following conditions are satisfied: r is R n ＝R (n-1) *T (n-1) ,T n ＝1-R n , R 1 ＝0.5,T 1 =0.5. In this way, the illumination amplitude of the light reflected by each of the light splitting surfaces 10 remains uniform, thereby providing uniform on-axis illumination light.
The parallel light assembly 20 may include a light source and a collimation mechanism, where the collimation mechanism may adopt a collimation system in the prior art, and after the light emitted by the light source is collimated by the collimation mechanism, the light is converted into parallel light beam, so that the parallel light beam is emitted to the light splitting assembly.
The beam splitting surface 10 may be a very thin beam splitting lens that meets the above-mentioned position and size requirements, and the reflectance and transmittance thereof also meet the above-mentioned requirements. The beam splitting lens can be in a strip shape, and two ends of the beam splitting lens can be fixed through the fixing plate. Of course, the light splitting surface 10 may be a reflecting surface of a prism, and may be formed by splicing a plurality of prisms.
The embodiment of the present invention further provides a planar coaxial light source, and on the basis of the above embodiment, the specific configuration of the light splitting surface 10 is described in this embodiment, and as shown in fig. 3, the planar coaxial light source further includes a prism group formed by N-1 sequentially arranged parallelogram prisms 11 and right trapezoid prisms 12 respectively located at two ends of the N-1 sequentially arranged parallelogram prisms 11. As shown in fig. 4, the cross-sectional shape of the parallelogram prism 11 is a rectangular shape, and the parallelogram prism 11 has two inclined planes and two planes, wherein the included angles between the two inclined planes and the upper and lower planes are respectively 45 degrees and 135 degrees, and the distance H2 between the two planes is equal to the width L2 of the plane. As shown in fig. 5, the rectangular trapezoid prism 12 has a rectangular shape, and has three planes and an inclined plane, wherein the internal angles are a 45 degree angle, a 135 degree angle and two right angles, the inclined plane forms 135 degree angles and 45 degree angles with the upper plane and the lower plane respectively, and H1 and L1 are equal in the figure. All the parallelogram prisms 11 are arranged according to the same orientation, the upper planes of all the parallelogram prisms 11 are in the same plane, the inclined planes of the parallelogram prisms 11 are glued with each other to form a part of the light splitting surface 10, and the inclined planes of the right trapezoid prisms 12 and the inclined planes of the adjacent parallelogram prisms 11 are glued together to form the light splitting surface 10. The lengths of the right trapezoid prism 12 and the parallelogram prism 11 in the direction perpendicular to the paper surface can be equal, so that the prism group forms a cuboid. A housing 21 is fixed to the outer side of one of the right trapezoid prisms 12, and the parallel light assembly 20 is disposed in the housing 21, and as shown in the drawing, parallel light emitted from the parallel light assembly 20 is incident into the prism group from the plane of the right trapezoid prism 12. The planar coaxial light source is made into a complete and independent device, and the device can be directly arranged in visual detection and image measurement equipment, so that the device is convenient to directly use.
In order to ensure that light can be transmitted relatively uniformly in the prism group, the materials of the parallelogram prism 11 and the right trapezoid prism 12 can be the same, so that the same reflectance and transmittance are provided at the non-splitting surfaces of the parallelogram prism 11 and the right trapezoid prism 12.
The different reflectivities and transmittances of the respective light splitting surfaces 10 can be achieved by plating the respective light splitting surfaces 10 with a reflective film and a transmissive film, each of which has a reflectance and transmittance that are configured in accordance with the reflectance and transmittance required for the respective light splitting surfaces 10. And the outer surface of the prism group is plated with an antireflection film, so that the light transmittance is enhanced, and the radiation loss of light is reduced.
As shown in fig. 6, the housing 21 is provided with a groove 22, and the prism group is inserted into the groove 22 and fixed in the groove 22. The housing 21 may be fixed to the outside of only one right trapezoid prism 12, or may be fixed to the outside of a prism group and disposed around the prism group to form a square ring structure, an annular groove 22 is provided on the inner wall of the ring structure, and the periphery of the prism group is inserted into the groove 22 to be fixedly connected with the housing 21.
The housing 21 is further provided with a heat dissipation structure 23, and the heat dissipation structure 23 is used for assisting in heat dissipation due to the fact that the parallel light assembly 20 emits light to generate more heat, and may be specifically a heat dissipation plate or other structure, so that the housing 21 may be made of a heat conducting material for assisting in conducting the heat to the outside of the housing 21.
Based on the above embodiments, two embodiments will be provided herein to illustrate the alignment mechanism:
in one embodiment, as shown in fig. 6 and 7, the housing 21 is provided with a groove 22, the groove 22 opening toward the prism group. The collimation mechanism comprises a bottom plate 24 arranged in parallel with the incidence direction of the parallel light and a reflecting surface 25 covered on the bottom plate, wherein the bottom plate 24 is fixed on the inner wall of the groove 22, and the reflecting surface 25 is formed by the inner wall of the groove 22. The reflecting surface 25 has a first off-axis parabolic surface 251 above the base plate 24 and a second off-axis parabolic surface 252 below the base plate 24, a first light source 201 is fixed on the upper surface of the base plate 24 and the first light source 201 is located at the focal point of the first off-axis parabolic surface 251, and a second light source 202 is fixed on the lower surface of the base plate 24 and the second light source 202 is located at the focal point of the second off-axis parabolic surface 252. The light emitted by the first light source 201 and the second light source 202 is reflected by the two off-axis paraboloids respectively and then emitted outwards in parallel light. The first light source 201 and the second light source 202 may each be a strip of light extending in a direction perpendicular to the plane of the paper, with light scattered toward the off-axis paraboloid. The thickness of the base plate 24 may be set to a smaller size to reduce the effect of the base plate 24 on light.
In one embodiment, as shown in fig. 8 and 9, the housing 21 is provided with a groove 22, the groove 22 opening toward the prism group. The collimation mechanism comprises a bottom plate 24 and a reflecting surface 25, wherein the bottom plate 24 is arranged in parallel with the incidence direction of parallel light, the reflecting surface is arranged above the bottom plate, the reflecting surface is in an off-axis paraboloid shape, and the reflecting surface 25 is formed by the inner wall of the groove 22. The upper surface of the base plate 24 is flush with the lower surface of the prism assembly, and the light source 200 is fixed to the base plate 24 and is positioned at the focal point of the reflecting surface 25. Light from the light source 200 is reflected by the off-axis paraboloid and is emitted outwards in parallel light. The light source 200 may be a strip of lamps extending in a direction perpendicular to the plane of the paper with light scattered toward the off-axis paraboloids. To facilitate heat dissipation, the outer surface of the bottom plate 24 is provided with a plurality of heat dissipation plates arranged in parallel.
The foregoing is a further detailed description of the invention in connection with specific embodiments, and it is not intended that the invention be limited to such description. It will be apparent to those skilled in the art that several simple deductions or substitutions can be made without departing from the spirit of the invention.
Claims (10)
1. A planar coaxial light source, characterized by:
the light splitting device comprises a light splitting group consisting of N light splitting surfaces which are arranged in parallel and a parallel light component positioned at one side of the light splitting group, wherein the parallel light component is used for emitting parallel light to the light splitting group; the incidence angle of the parallel light on the light splitting surface is 45 degrees, the height of the light splitting surface in the direction perpendicular to the incidence direction of the parallel light is equal to the distance between two adjacent light reflecting surfaces in the incidence direction of the parallel light, the height of the light splitting surface in the direction perpendicular to the incidence direction of the parallel light is equal to the beam height H of the parallel light, the beam height H of the parallel light and the length L of an object to be detected in the incidence direction of the parallel light meet the relation that N is equal to or more than H and equal to L, and N is equal to or more than 2; the N light splitting surfaces are sequentially numbered as N-1 along the incidence direction of the parallel light, and the reflection ratio R of the nth light splitting surface (n) And transmittance T (n) The following conditions are satisfied: r is R n ＝R (n-1) *T (n-1) ,T n ＝1-R n ,R 1 ＝0.5,T 1 ＝0.5。
2. The planar coaxial light source of claim 1, wherein:
the parallel light assembly comprises a light source and a collimation mechanism, and light emitted by the light source is collimated by the collimation mechanism and then emitted to the light splitting group.
3. The planar coaxial light source of claim 2, wherein:
the collimation mechanism comprises a bottom plate and a reflecting surface, wherein the bottom plate is arranged in parallel with the incidence direction of parallel light, the reflecting surface is arranged above the bottom plate, the reflecting surface is in an off-axis parabolic shape, and the light source is fixed on the bottom plate and is positioned on a focus of the reflecting surface.
4. The planar coaxial light source of claim 2, wherein:
the collimation mechanism comprises a bottom plate and a reflecting surface, wherein the bottom plate is arranged in parallel with the incidence direction of parallel light, the reflecting surface covers the bottom plate, the reflecting surface is provided with a first off-axis paraboloid positioned above the bottom plate and a second off-axis paraboloid positioned below the bottom plate, the upper surface of the bottom plate is fixedly provided with a first light source, the first light source is positioned on the focus of the first off-axis paraboloid, and the lower surface of the bottom plate is fixedly provided with a second light source, and the second light source is positioned on the focus of the second off-axis paraboloid.
5. A planar coaxial light source according to any one of claims 1-4, wherein:
the light splitting device further comprises a prism group formed by N-1 parallelogram prisms which are sequentially arranged and right trapezoid prisms which are respectively positioned at two ends of the N-1 parallelogram prisms which are sequentially arranged, wherein the inclined planes of the right trapezoid prisms are glued with the inclined planes of the adjacent parallelogram prisms and the inclined planes of the adjacent two parallelogram prisms to form the light splitting surface; the outer side of one right trapezoid prism is fixed with the shell, the parallel light component is arranged in the shell, and parallel light emitted by the parallel light component is emitted into the prism group from the plane of the right trapezoid prism fixed with the shell.
6. The planar coaxial light source of claim 5, wherein:
the parallelogram prism and the right trapezoid prism are the same in material.
7. The planar coaxial light source of claim 5, wherein:
the outer surface of the prism group is plated with an antireflection film.
8. The planar coaxial light source of claim 5, wherein:
the housing is fixed to the outside of the prism group and disposed around the prism group.
9. The planar coaxial light source of claim 5, wherein:
and a heat dissipation structure is further arranged on the shell.
10. The planar coaxial light source of claim 9, wherein:
the heat dissipation structure is a plurality of heat dissipation plates arranged on the surface of the shell.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811495258.8A CN109555998B (en) | 2018-12-07 | 2018-12-07 | Plane coaxial light source |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811495258.8A CN109555998B (en) | 2018-12-07 | 2018-12-07 | Plane coaxial light source |
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| CN109555998B true CN109555998B (en) | 2024-02-13 |
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|---|---|
| CN109555998A (en) | 2019-04-02 |
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