Bidirectional laser emitting device capable of synchronously adjusting divergence angle
By adopting a divergence angle synchronous adjustment design in the laser emitting device, a single-group laser, a zoom beam expanding mirror group and a glued prism are used to realize bidirectional laser emission, solving the problems of high cost and high power consumption of existing devices.
Patent Information
- Application Number
- CN202420216237.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-30
- Publication Date
- 2025-02-11
- Estimated Expiration
- 2034-01-30
AI Technical Summary
When the existing laser emitting device performs bidirectional laser emission, two sets of laser light sources are required, resulting in high cost and high power consumption.
By designing a bidirectional laser emission device with synchronous adjustment of divergence angle, a single-group laser is used to combine a zoom beam expanding mirror group and a glued prism to achieve bidirectional laser emission.
It realizes that bidirectional laser emission can be completed with only one laser, reducing cost and power consumption.
Smart Images
Figure CN222461812U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of laser devices, in particular to a bidirectional laser emitting device with synchronously regulated divergence angles. Background Art
[0002] Existing laser emitting devices all use a single light source to emit linearly or refract to form a unidirectional laser emission line. When bidirectional laser emission is required, existing equipment is assembled using two groups of laser light sources. In actual practice, the cost of the laser light source is relatively high, which in turn leads to the high cost of the laser emitting device. In addition, the arrangement of the two groups of laser light sources makes the entire device relatively power-intensive. Therefore, there is an urgent need to develop a device that can complete bidirectional laser emission with only one laser. Summary of the invention
[0003] In view of the above problems, the utility model provides a bidirectional laser emitting device with synchronously adjusted divergence angle, which can complete bidirectional laser emission through a single set of lasers, thereby reducing costs and power consumption.
[0004] A bidirectional laser emitting device with synchronously regulated divergence angle, characterized in that it comprises:
[0005] Lasers;
[0006] A variable-power beam expander lens assembly, comprising an incident surface and an exit surface;
[0007] and a cemented prism, comprising an incident surface, a beam splitting surface, a reflecting surface, a first exit surface, and a second exit surface, wherein the first exit surface is arranged parallel to the second exit surface;
[0008] The output beam of the laser is arranged toward the incident surface of the variable-power beam expander group. The variable-power beam expander group is used to adjust the output divergence angle of the output beam of the input laser. The variable-power output light of the variable-power beam expander group is vertically emitted to the incident surface of the cemented prism. The beam splitting surface splits the light beam into a transmitted light beam and a reflected light beam. The transmitted light beam is emitted to the reflecting surface at an unchanged angle. The reflected light beam is vertically redirected and emitted to the first output surface. The transmitted light beam is vertically redirected through the reflecting surface and emitted to the second output surface.
[0009] The first exit surface and the second exit surface are arranged on both sides of the exit light beam of the laser.
[0010] It is further characterized by:
[0011] The cemented prism comprises a small isosceles right-angle prism and a large isosceles right-angle prism, the hypotenuse of the small isosceles right-angle prism and a right-angle side of the large isosceles right-angle prism are of equal length, and are assembled to form a beam splitting surface, and a right-angle side of the small isosceles right-angle prism is an incident surface, and the incident surfaces are parallel and spaced apart and arranged at positions of an extended region of an exit direction of an exit surface of the variable-power beam expander group;
[0012] The exit point of the first exit surface and the exit area of the second exit surface are not in the same straight line, and the two groups of laser exit lines have different directions;
[0013] It also includes a shell, and two sides of the shell are provided with emission notches at positions corresponding to the emission areas.
[0014] After adopting the structure of the utility model, the optical effect principle is shown in Figure 2 The laser output beam is beam a, which is emitted through the variable-power beam expander group to become beam b. Beam b is reflected through the cemented prism interface AB to become beam c. Beam b is transmitted through the cemented prism interface AB and then reflected through the interface BC to become beam d. Beam c and beam d are emitted in both directions. The output divergence angle of beam a is α, and the output divergence angle of beam b is β. The output divergence angles of beam c and beam d are still β. The beam a is expanded through the variable-power beam expander group to adjust the divergence angle of beam b, and then the output beam divergence angles of the bidirectional laser beams c and beam d are adjusted. It can complete bidirectional laser emission through a single set of lasers, which reduces costs and also reduces power consumption. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 This is a schematic diagram of the assembly structure of the utility model;
[0016] Figure 2 This is an optical principle diagram of the utility model;
[0017] The names corresponding to the serial numbers in the figure are as follows:
[0018] Laser 10, variable power beam expander lens assembly 20, incident surface 21, exit surface 22, cemented prism 30, incident surface 31, splitter surface 32, reflecting surface 33, first exit surface 34, second exit surface 35, small isosceles right-angle prism 301, large isosceles right-angle prism 302, shell 40, and exit notch 41. DETAILED DESCRIPTION
[0019] A bidirectional laser emitting device with synchronously adjusted divergence angle, see Figure 1-Figure 2 It includes a laser 10, a variable-power beam expander lens set 20, a cemented prism 30, and a housing 40.
[0020] The variable-power beam expander lens assembly 20 includes an incident surface 21 and an exit surface 22;
[0021] The cemented prism 30 includes an incident surface 31, a beam splitting surface 32, a reflecting surface 33, a first exit surface 34, and a second exit surface 35. The first exit surface 34 is arranged parallel to the second exit surface 35.
[0022] The outgoing light beam of the laser 10 is arranged toward the incident surface 21 of the variable power beam expander lens group 20. The variable power beam expander lens group 20 is used to adjust the outgoing divergence angle of the outgoing light beam input to the laser 10. The variable power outgoing light beam of the variable power beam expander lens group 20 is vertically emitted to the incident surface 31 of the cemented prism 30. The beam splitting surface 32 splits the light beam into a transmitted light beam and a reflected light beam. The transmitted light beam is emitted to the reflecting surface 33 without changing its angle. The reflected light beam is vertically redirected and emitted to the first exit surface 34. The transmitted light beam is vertically redirected through the reflecting surface 33 and emitted to the second exit surface 35. The first exit surface 34 and the second exit surface 35 are arranged on both sides of the outgoing light beam of the laser 10.
[0023] The shell 40 is a longitudinally long shell, and emission notches 41 are arranged on both sides of the shell in the length direction corresponding to the positions of the emission areas, and the positions of the emission notches 41 are covered with transparent glass 42; the laser 10, the variable power beam expander lens group 20, and the glued prism 30 are fixedly arranged in sequence along the length direction of the inner cavity of the shell 40.
[0024] In a specific implementation, the cemented prism 30 includes a small isosceles right-angle prism 301 and a large isosceles right-angle prism 302, the right-angle side length of the small isosceles right-angle prism is K, and the side length of the large isosceles right-angle prism is L; the hypotenuse of the small isosceles right-angle prism 301 and the right-angle side of the large isosceles right-angle prism 302 are equal in length and are combined to form a beam splitting surface 31, 2, the right-angle side of the small isosceles right-angle prism 301 is an incident surface 31, and the incident surface 31 is parallel and spaced apart and arranged at a position of an extended region of the exit direction of the exit surface 22 of the variable magnification beam expander lens group 20;
[0025] The emission point of the first emission surface 34 and the emission area of the second emission surface 35 are not in the same straight line. There is a difference in direction between the two groups of laser emission lines, and the difference in parallel interval is 0.5 (L+K).
[0026] In a specific embodiment, the transmission-reflection ratio of the beam splitting surface of the cemented prism is 50:50; and the variable-magnification beam expander lens group is a 2X beam expander lens group.
[0027] The principle of its optical effect can be seen in Figure 2The laser output beam is beam a, which is emitted through the variable-power beam expander group to become beam b. Beam b is reflected through the cemented prism interface AB to become beam c. Beam b is transmitted through the cemented prism interface AB and then reflected through the interface BC to become beam d. Beam c and beam d are emitted in both directions. The output divergence angle of beam a is α, and the output divergence angle of beam b is β. The output divergence angles of beam c and beam d are still β. The beam a is expanded through the variable-power beam expander group to adjust the divergence angle of beam b, and then the output beam divergence angles of the bidirectional laser beams c and beam d are adjusted. It can complete bidirectional laser emission through a single set of lasers, which reduces costs and also reduces power consumption.
[0028] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.
[0029] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.
Claims
1. A bidirectional laser emitting device with synchronously adjusted divergence angle, characterized in that: It includes: Lasers; A variable-power beam expander lens assembly, comprising an incident surface and an exit surface; and a cemented prism, comprising an incident surface, a beam splitting surface, a reflecting surface, a first exit surface, and a second exit surface, wherein the first exit surface is arranged parallel to the second exit surface; The output beam of the laser is arranged toward the incident surface of the variable-power beam expander group. The variable-power beam expander group is used to adjust the output divergence angle of the output beam of the input laser. The variable-power output light of the variable-power beam expander group is vertically emitted to the incident surface of the cemented prism. The beam splitting surface splits the light beam into a transmitted light beam and a reflected light beam. The transmitted light beam is emitted to the reflecting surface at an unchanged angle. The reflected light beam is vertically redirected and emitted to the first output surface. The transmitted light beam is vertically redirected through the reflecting surface and emitted to the second output surface. The first exit surface and the second exit surface are arranged on both sides of the exit light beam of the laser.
2. A bidirectional laser emitting device with synchronously adjusted divergence angle according to claim 1, characterized in that: The glued prism comprises a small isosceles right-angle prism and a large isosceles right-angle prism, the hypotenuse of the small isosceles right-angle prism and a right-angle side of the large isosceles right-angle prism are of equal length and are assembled to form a beam splitting surface, the right-angle side of the small isosceles right-angle prism is an incident surface, and the incident surfaces are parallel and spaced apart in an exit direction extension area of an exit surface of the variable magnification beam expander group.
3. The bidirectional laser emitting device with synchronously adjusted divergence angle according to claim 1, characterized in that: The exit point of the first exit surface and the exit area of the second exit surface are not on the same straight line, and the two groups of laser exit lines have different directions.
4. A bidirectional laser emitting device with synchronously adjusted divergence angle according to claim 1, characterized in that: It also includes a shell, and two sides of the shell are provided with emission notches at positions corresponding to the emission areas.