CN114924421A - Gluing folding prism and optical system for beam shaping and turning - Google Patents
Gluing folding prism and optical system for beam shaping and turning Download PDFInfo
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- CN114924421A CN114924421A CN202210565208.2A CN202210565208A CN114924421A CN 114924421 A CN114924421 A CN 114924421A CN 202210565208 A CN202210565208 A CN 202210565208A CN 114924421 A CN114924421 A CN 114924421A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
- G02B27/0938—Using specific optical elements
- G02B27/095—Refractive optical elements
- G02B27/0972—Prisms
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
- G02B27/0938—Using specific optical elements
- G02B27/0977—Reflective elements
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Abstract
The invention discloses a gluing and folding prism and an optical system for beam shaping and turning, wherein the gluing and folding prism comprises: the first incident prism, the second incident prism and the third incident prism are arranged on the same incident surface and are respectively used for dividing incident light into three paths along the horizontal direction and rearranging the three paths of emergent light in the direction vertical to the plane of the optical axis; the exit surfaces of the first incident prism, the second incident prism and the third incident prism are provided with reflecting prisms for turning the light path to the same side; the emergent surface of the reflection prism is provided with an emergent prism for guiding emergent light, and the emergent surfaces of the emergent prisms are the same plane. The invention designs the prism gluing layout and rearranges the layout of rectangular light spots, thereby adjusting the product of the divergence angle and the size parameter. Meanwhile, 90-degree turning of the light path is completed, and the volume of the optical system is reduced.
Description
Technical Field
The invention relates to the technical field of optical devices, in particular to a gluing and folding prism and an optical system for beam shaping and turning.
Background
The semiconductor laser has the advantages of high electro-optic conversion efficiency, small volume, light weight and the like, so that the application of the semiconductor laser becomes wider and wider. A single light emitting area semiconductor laser cannot achieve extremely high power, and thus an area array laser formed by laminating and arraying a plurality of bar array semiconductor lasers has appeared. However, the semiconductor laser has the characteristics of large light spot, large divergence angle, large astigmatism and the like, and further application of the semiconductor laser is limited. To meet the application requirements, the beam of the semiconductor laser must first be shaped.
Disclosure of Invention
The present invention overcomes the deficiencies of the prior art by providing a cemented folding prism and optical system for beam shaping and turning that solves the problems noted above in the background.
A cemented folding prism and optical system for beam shaping and turning, the cemented folding prism comprising:
the first incident prism, the second incident prism and the third incident prism are arranged on the same incident surface and are respectively used for dividing incident light into three paths along the horizontal direction and rearranging the three paths of emergent light in the direction vertical to the plane of the optical axis;
the exit surfaces of the first incident prism, the second incident prism and the third incident prism are provided with reflecting prisms for turning the light path to the same side;
and the emergent surface of the reflecting prism is provided with an emergent prism for guiding emergent light, and the emergent surfaces of the emergent prisms are the same plane.
As a further technical scheme: the material of the glued folding prism is optical glass or resin material.
As a further technical scheme: the first entrance prism shape or size defining shape and size matches the entrance spot.
As a further technical scheme: the angle of the incident light is vertical incidence.
As a further technical scheme: the second incidence prism and the third incidence prism are both prisms in parallelogram shapes.
As a further technical scheme: the acute angle of the parallelogram-shaped prism is 45 degrees, wherein the incident light is perpendicular to the incident surface, and the incident angle and the reflection angle of the first reflection surface and the second reflection surface inside the prism are 45 degrees.
As a further technical scheme: the reflecting prism adopts a 45-degree prism.
As a further technical scheme: the emergent prism is a cuboid prism, and the size of the emergent prism is matched with that of the light source.
As a further technical scheme: the product relation of the divergence angle of the emergent light and the size parameter is satisfied as follows: theta x ·H x ＝θ y ·H y ；
Where θ is the divergence angle of the direction, and H is the size of the direction, and the product of the divergence angle and the size parameter is used to reflect the beam quality of the current direction.
An optical system employing a cemented folding prism for beam shaping and turning as described in any one of the above claims, comprising:
the light source component is used for providing a path of light;
the gluing folding prism is used for shaping and turning the light beam;
the meniscus lens is used for focusing the light spots passing through the cemented folding prism;
and the cylindrical mirror is used for compressing the divergence angles in the vertical direction and the horizontal direction.
Compared with the prior art, the invention has the following technical effects:
by adopting the technical scheme, the glued folding prism is formed by gluing 9 small prisms according to a specific layout, the rectangular incident light is divided into three parts along the horizontal x direction, and three parts of light are rearranged along the vertical direction y in a plane perpendicular to the optical axis, so that the product of parameters of the light beam in two directions is adjusted, the light beam shaping is completed, the two-dimensional light field distribution with better symmetry is obtained, meanwhile, the 90-degree turning of the light path is realized, and the volume of the optical system is reduced.
Drawings
The following detailed description of embodiments of the invention refers to the accompanying drawings in which:
FIG. 1 is a schematic structural view of a glued-folded prism according to some embodiments disclosed herein;
FIG. 2 is a schematic diagram of the entrance and exit faces of a cemented folding prism of some embodiments disclosed herein;
FIG. 3 is a schematic diagram of a glued-fold prism and optical system according to some embodiments disclosed herein;
FIG. 4 is a front side perspective schematic view of a glued-fold prism of some embodiments disclosed herein;
fig. 5 is a rear perspective schematic view of a glued-folded prism of some embodiments disclosed herein.
In the figure: 10. a first incident prism; 11. a second incident prism; 12. a third incident prism; 20. a reflective prism; 30. an exit prism; 40. a meniscus lens; 41. a cylindrical mirror.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, in an embodiment of the present invention, a glued folding prism and an optical system for beam shaping and turning are provided, the glued folding prism includes:
the first incidence prism 10, the second incidence prism 11 and the third incidence prism 12 are arranged on the same incidence plane and are respectively used for dividing the incident light into three paths along the horizontal direction and rearranging the three paths of emergent light in the direction vertical to the plane of the optical axis;
the exit surfaces of the first incident prism 10, the second incident prism 11 and the third incident prism 12 are all provided with reflection prisms 20 for turning the light path to the same side;
in a specific embodiment, the second incident prism 11 and the third incident prism 12 are each a prism having a parallelogram shape.
In a specific embodiment, the material of the glued folding prism is optical glass or resin.
In a specific embodiment, the first entrance prism shape or size-defined shape and size matches the entrance spot.
In a specific embodiment, the angle of the incident light is vertical incidence.
In a specific embodiment, the acute angle of the parallelogram-shaped prism is 45 degrees, wherein the incident light is perpendicular to the incident surface, and the incident angle and the reflection angle of the first reflection surface and the second reflection surface inside the prism are 45 degrees.
In a specific embodiment, the emergent prism is a cuboid prism, and the size of the emergent prism is matched with that of the light source.
The acute angle of the prism in the parallelogram shape is 45 degrees, wherein the short side size of the prism is matched with the incident light size, the long side size is not limited, the incident light is perpendicular to the incident surface, and the incident angle and the reflecting angle of the first reflecting surface and the second reflecting surface in the prism are both 45 degrees.
The exit surface of the reflection prism 20 is provided with an exit prism 30 for guiding the exit light, and the exit surfaces of the exit prisms 30 are the same plane. In a specific embodiment, the reflecting prism 20 is a 45-degree prism.
In a specific embodiment, as shown in fig. 1 and fig. 2, the incident surface of the rectangular laser incident folding prism is divided into three parts;
a first part of light of the incident surface reaches the reflecting surface of the reflecting prism 20 of the first 45-degree prism through the first incident prism 10 to be totally reflected, and then reaches the emergent surface of the emergent prism 30;
the second part of light of the incident surface passes through a second incident prism 11 in a parallelogram shape, is subjected to twice total reflection to reach a reflecting prism 20 of a second 45-degree prism, and is subjected to total reflection again to reach the emergent surface of an emergent prism 30;
the third part of the light on the incident surface passes through the third incident prism 12 in the shape of a parallelogram, is subjected to twice total reflection, reaches the reflection prism 20 of the third 45-degree prism, and is subjected to total reflection again to reach the exit surface of the exit prism 30.
Finally, the rearrangement layout of the rectangular light spots is completed, so that the product of the divergence angle and the size parameter is adjusted. Meanwhile, 90-degree turning of the light path is completed, and the volume of the optical system is reduced.
As shown in fig. 4 and 5, there are illustrated perspective views of the front and rear sides of the glue fold prism.
In a specific embodiment, a product relationship between the divergence angle of the outgoing light and the size parameter is satisfied as follows: theta x ·H x ＝θ y ·H y ；
Where θ is the divergence angle of the direction, and H is the size of the direction, and the product of the divergence angle and the size parameter is used to reflect the beam quality of the current direction.
Fig. 3 is a schematic diagram of a glued-folded prism and an optical system. An optical system applying any one of the above glued folding prisms for beam shaping and turning, comprising:
the light source component is used for providing a path of light;
the gluing folding prism is used for shaping and turning the light beam;
a meniscus lens 40 for focusing the light spot passing through the cemented folding prism;
a cylindrical mirror 41 for compressing the divergence angles in the vertical and horizontal directions.
The glued folding prism is formed by gluing 9 small prisms according to a specific layout, dividing rectangular incident light into three parts along the horizontal x direction, rearranging three parts of light along the vertical direction y in a plane perpendicular to an optical axis, and adjusting the product of two direction parameters (the product of a divergence angle and a size parameter: theta) x ·H x ＝θ y ·H y ) The shaping of the light beam is completed, the two-dimensional light field distribution with better symmetry is obtained, the 90-degree turning of the light path is realized, and the volume of the optical system is reduced.
Because the glued folding prism is formed by gluing 9 small prism layouts, compared with folding beam prisms in other structural forms, the difficulty of optical processing is reduced.
Emergent light enters a subsequent meniscus lens 40, a first cylindrical lens 41 and a second cylindrical lens 41 to form light beams with uniform energy distribution and same divergence angles in two directions, and the divergence angles and the energy distribution are further adjusted through a subsequent beam expanding system to form the light beams meeting the design requirements.
The light beam processed by the gluing and folding prism and the subsequent optical system has the characteristics of low divergence angle, high symmetry and high filling ratio, can be focused into an extremely small round light spot, and is coupled into a solid laser rod or an optical fiber. And then the divergence angle of the light beam is further adjusted through the beam expander, so that the use requirement is met.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made herein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents, and all such modifications are intended to be included within the scope of the invention.
Claims (10)
1. A glued folding prism for beam shaping and turning, the glued folding prism comprising:
the first incident prism, the second incident prism and the third incident prism are arranged on the same incident plane and are respectively used for dividing the incident light into three paths along the horizontal direction and rearranging the three paths of emergent light in the direction vertical to the plane of the optical axis;
the exit surfaces of the first incident prism, the second incident prism and the third incident prism are provided with reflecting prisms for turning the light path to the same side;
the emergent surface of the reflection prism is provided with an emergent prism for guiding emergent light, and the emergent surfaces of the emergent prisms are the same plane.
2. The prism as claimed in claim 1, wherein the prism is made of optical glass or resin.
3. The cemented folding prism for beam shaping and turning as claimed in claim 1, wherein the first entrance prism shape or size-defined shape and size matches the entrance spot.
4. The cemented folding prism for beam shaping and turning as claimed in claim 1, wherein the angle of the incident light is normal incidence.
5. The cemented folding prism for beam shaping and turning as claimed in claim 1, wherein the second and third incident prisms are parallelogram shaped prisms.
6. The cemented folding prism as claimed in claim 1, wherein the parallelogram shaped prism has an acute angle of 45 degrees, and wherein the incident light is incident perpendicularly to the incident surface, and the incident and reflecting angles of the first and second reflecting surfaces inside the prism are 45 degrees.
7. The cemented folding prism for beam shaping and turning as claimed in claim 1, wherein the reflecting prism is a 45 degree prism.
8. The glued folded prism for beam shaping and turning according to claim 1, wherein the exit prism is a rectangular prism having a size matching a size of the light source.
9. The cemented folding prism for beam shaping and turning according to claim 1, wherein the product of the divergence angle and the size parameter of the outgoing light satisfies the following relationship: theta x ·H x ＝θ y ·H y ；
Wherein, theta is the divergence angle of the direction, H is the size of the direction, and the product of the divergence angle and the size parameter is used for reflecting the beam quality of the current direction.
10. An optical system using the cemented folding prism for beam shaping and turning as claimed in any one of claims 1 to 9, comprising:
the light source component is used for providing a path of light;
the gluing folding prism is used for shaping and turning the light beam;
the meniscus lens is used for focusing the light spots passing through the cemented folding prism;
and the cylindrical mirror is used for compressing the divergence angles in the vertical direction and the horizontal direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210565208.2A CN114924421A (en) | 2022-05-23 | 2022-05-23 | Gluing folding prism and optical system for beam shaping and turning |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210565208.2A CN114924421A (en) | 2022-05-23 | 2022-05-23 | Gluing folding prism and optical system for beam shaping and turning |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114924421A true CN114924421A (en) | 2022-08-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210565208.2A Pending CN114924421A (en) | 2022-05-23 | 2022-05-23 | Gluing folding prism and optical system for beam shaping and turning |
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| Country | Link |
|---|---|
| CN (1) | CN114924421A (en) |
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2022
- 2022-05-23 CN CN202210565208.2A patent/CN114924421A/en active Pending
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