CN210181223U - Compact laser radar ranging optical system - Google Patents
Compact laser radar ranging optical system Download PDFInfo
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- CN210181223U CN210181223U CN201920879220.4U CN201920879220U CN210181223U CN 210181223 U CN210181223 U CN 210181223U CN 201920879220 U CN201920879220 U CN 201920879220U CN 210181223 U CN210181223 U CN 210181223U
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Abstract
The utility model provides a compact laser radar ranging optical system, which not only has a small and compact structure, but also can increase the focal length of a collimation system to improve the collimation parallelism of an output light beam, thereby increasing the measurement distance; the LED lamp comprises a collecting lens, wherein a mounting hole is formed in the center of the collecting lens, a Cassegrain collimation system is embedded in the mounting hole and comprises a semiconductor diode emission source, a concave reflector and a convex reflector which are coaxially arranged in sequence, and the center of the concave reflector is provided with a hole.
Description
Technical Field
The utility model relates to an optical lens technical field specifically is compact laser radar range finding optical system.
Background
In modern industrial production, laser is widely used as a sensor for measuring various parameters, a laser beam is irradiated on a target object to generate a diffuse reflection signal, and a detector is used for receiving the reflected laser signal to analyze a material structure, measure the appearance of the object, measure the position and the distance of the object and the like, particularly, laser radar ranging is applied to various occasions. The laser radar ranging system has the advantages that the laser radar ranging types are various, the coaxial ranging mode has a compact and small structure and huge potential, the semiconductor diode laser is used as a first-choice light source of the compact coaxial ranging system and has different divergence angles and light beam qualities, the output power of the semiconductor diode laser is larger, the larger the output power is, the poorer the light beam quality is, the poorer the collimating effect is, the light beam divergence is fast, the energy concentration is low, the output power is increased and the measuring distance is increased in a disproportionate manner, the focal length of the collimating system needs to be lengthened in order to increase the collimation degree of the light beam, but the length of the collimating system can be increased, and the reduction of the structure size of the system is not facilitated.
Disclosure of Invention
To the above problem, the utility model provides a compact laser radar range finding optical system, its small and exquisite compactness of not only structure, and multiplicable collimation system focus and promote output beam collimation depth of parallelism to multiplicable measuring distance.
The technical scheme is as follows: the method is characterized in that: the LED lamp comprises a collecting lens, wherein a mounting hole is formed in the center of the collecting lens, a Cassegrain collimation system is embedded in the mounting hole and comprises a semiconductor diode emission source, a concave reflector and a convex reflector which are coaxially arranged in sequence, and the center of the concave reflector is provided with a hole.
It is further characterized in that:
an opaque sleeve is assembled in the mounting hole, the semiconductor diode emission source, the concave reflector and the convex reflector are sequentially assembled in the sleeve, and the semiconductor diode emission source is a semiconductor diode laser;
one end part of the emission surface of the semiconductor diode emission source is embedded in the sleeve, the other end part of the emission surface of the semiconductor diode emission source is connected with the driving circuit board, and the back surface of the concave reflector is planar and is tightly attached to the emission surface of the semiconductor diode emission source;
the integrated circuit board is connected with the driving circuit board through a support piece, a detector is mounted on the integrated circuit board, and a target surface of the detector is located at the focus position of the condenser lens;
the front surface and the rear surface of the condenser, the concave surface of the concave reflector and the convex surface of the convex reflector are coated with films;
the light beam emitted by the emitting source of the semiconductor diode is a multimode laser beam, and the direction of the light beam is divided into two different vertical and orthogonal divergence directions;
the aperture of the central opening of the concave reflector is arranged, so that the light transmission quantity of the aperture of the light beam emitted by the conductor diode emission source is more than 95%;
the outer diameter of the convex reflector is set so that the reflection flux of the aperture of the light beam emitted by the conductor diode emission source is greater than 95%, and the outer diameter of the convex reflector is not greater than the aperture of the light beam emitted by the conductor diode emission source;
the condenser adopts an aspheric lens.
The beneficial effects of the utility model are that, it has the mounting hole to open through at the condensing lens center, it is equipped with cassegrain collimation system to inlay in the mounting hole, and the central trompil of the concave surface speculum among the cassegrain collimation system, then after the laser beam by the emission of semiconductor diode emission source passed the central trompil of concave surface speculum, can be reflected to the collimated output behind the concave surface speculum by the convex surface speculum, the laser beam that obtains high depth of parallelism, thereby realized both guaranteeing overall structure's small and exquisite compactness, multiplicable collimation system focus again, promote output collimated depth of parallelism, better distance measurement precision and bigger distance measurement scope have.
Drawings
Fig. 1 is an exploded cross-sectional view of the present invention.
Detailed Description
The following describes an embodiment of the compact lidar ranging optical system of the present invention in detail with reference to fig. 1.
As shown in fig. 1, the compact lidar ranging optical system includes a collecting lens 20, the collecting lens 20 is an aspheric lens, and a mounting hole is formed in the center of the collecting lens 20, which can balance the beam aperture of a collimated semiconductor diode emission source 30 and the amount of light passing through an echo detection signal, thereby improving the measurement range; a Cassegrain collimation system is embedded in the mounting hole and comprises a semiconductor diode emission source 30, a concave reflector 21 and a convex reflector 22 which are coaxially arranged in sequence, and the semiconductor diode emission source 30 is a semiconductor diode laser; the center of the concave reflector 21 is provided with a hole, so that the light beam emitted by the semiconductor diode emission source 30 can be ensured to freely and efficiently penetrate, and the penetrated light beam is reflected to the concave reflector 21 by the convex reflector 22 and then collimated to output a laser beam 31 with high parallelism; the shorter the distance between the concave mirror 21 and the convex mirror 22 is, the larger the surface curvature is, and in order to reduce the aberration influence, optimize the aberration, and improve the collimation parallelism of the collimated emission beam, the concave mirror 21 and the convex mirror 22 may adopt aspheric surfaces.
The opaque sleeve 23 is assembled in the mounting hole, and the semiconductor diode emission source 30, the concave reflector 21 and the convex reflector 22 are sequentially coaxially assembled in the sleeve 23 from left to right, so that the aims of shielding stray light and avoiding the interference of the stray light on a detection signal can be fulfilled.
One end part of the emission surface of the semiconductor diode emission source 30 is embedded in the sleeve 23, the other end part is connected with the driving circuit board 50, and the back surface of the concave reflector 21 is a plane and is tightly attached to the emission surface of the semiconductor diode emission source 30; the driving circuit board 50 is also provided with an incomplete opening, so that the reflected echo signals can be guaranteed to be efficiently focused on the detector 40 through the condenser lens 20; the integrated circuit board 60 is connected with the driving circuit board 50 through a support, the integrated circuit board 60 is provided with a detector 40, the detector 40 is an echo detector, and the target surface of the detector 40 is located at the focus position of the condenser lens 20.
The front and back surfaces of the condenser lens 20 are coated with films, so that the transmittance of echo reflection laser signals can be increased, and the concave surface of the concave reflector 21 and the convex surface of the convex reflector 22 are both coated with high-reflection films, so that the reflectivity of laser wavelength diffused by the semiconductor diode emission source 30 can be improved.
The light beam emitted by the semiconductor diode emission source 30 is a multimode laser beam, the divergence angle of the multimode laser beam is large and can be divided into two different vertical and orthogonal divergence directions, and the degrees of the fast axis divergence angle and the slow axis divergence angle of the semiconductor diode emission source 30 are different; the aperture size of the central opening of the concave reflector 21 is set to be as small as possible, so that the aperture flux of the light beam emitted by the conductor diode emission source is more than 95%; the outer diameter of the convex reflector 22 is set as small as possible, so that the reflection flux of the aperture of the light beam emitted by the conductor diode emission source is greater than 95%, and the outer diameter of the convex reflector 22 is not greater than the aperture of the light beam emitted by the conductor diode emission source.
The utility model discloses in, semiconductor diode laser sends the laser beam who diverges, after freely passing concave surface reflector 21's central trompil, laser beam is by convex surface reflector 22 reflection concave surface reflector 21 back collimation output, obtains the laser beam 31 of high depth of parallelism, thereby the utility model discloses a laser radar range finding optical system with coaxial light source transmission and echo signal reception, parallel depth of collimation height, space utilization height, compact structure to have better distance measurement precision and bigger distance measurement scope.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned; and for those skilled in the art, without departing from the inventive concept, several modifications and improvements can be made, which all fall within the scope of the invention.
Claims (9)
1. Compact laser radar range finding optical system, its characterized in that: the LED lamp comprises a collecting lens, wherein a mounting hole is formed in the center of the collecting lens, a Cassegrain collimation system is embedded in the mounting hole and comprises a semiconductor diode emission source, a concave reflector and a convex reflector which are coaxially arranged in sequence, and the center of the concave reflector is provided with a hole.
2. The compact lidar ranging optics of claim 1, wherein: the semiconductor diode laser is characterized in that an opaque sleeve is assembled in the mounting hole, the semiconductor diode emission source, the concave reflector and the convex reflector are sequentially assembled in the sleeve, and the semiconductor diode emission source is a semiconductor diode laser.
3. The compact lidar ranging optics of claim 2, wherein: one end part of the emission surface of the semiconductor diode emission source is embedded in the sleeve, the other end part of the emission surface of the semiconductor diode emission source is connected with the driving circuit board, and the back surface of the concave reflector is planar and is tightly attached to the emission surface of the semiconductor diode emission source.
4. The compact lidar ranging optics of claim 3, wherein: the integrated circuit board is connected with the driving circuit board through a supporting piece, a detector is installed on the integrated circuit board, and the target surface of the detector is located at the focus position of the condenser lens.
5. The compact lidar ranging optics of claim 1, wherein: the front surface and the rear surface of the condenser, the concave surface of the concave reflector and the convex surface of the convex reflector are coated with films.
6. The compact lidar ranging optics of claim 1, wherein: the light beam emitted by the emitting source of the semiconductor diode is a multimode laser beam, and the direction of the light beam is divided into two different vertical and orthogonal divergence directions.
7. The compact lidar ranging optics of claim 1, wherein: the aperture of the central opening of the concave reflector is arranged, so that the aperture of the light beam emitted by the conductor diode emission source has the light transmission quantity of more than 95%.
8. The compact lidar ranging optics of claim 1, wherein: the outer diameter of the convex reflector is set so that the reflection flux of the aperture of the light beam emitted by the conductor diode emission source is greater than 95%, and the outer diameter of the convex reflector is not greater than the aperture of the light beam emitted by the conductor diode emission source.
9. The compact lidar ranging optics of claim 1, wherein: the condenser adopts an aspheric lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920879220.4U CN210181223U (en) | 2019-06-12 | 2019-06-12 | Compact laser radar ranging optical system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920879220.4U CN210181223U (en) | 2019-06-12 | 2019-06-12 | Compact laser radar ranging optical system |
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| CN210181223U true CN210181223U (en) | 2020-03-24 |
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| CN201920879220.4U Active CN210181223U (en) | 2019-06-12 | 2019-06-12 | Compact laser radar ranging optical system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110109136A (en) * | 2019-06-12 | 2019-08-09 | 卡门哈斯激光科技（苏州）有限公司 | A kind of compact laser radar range finding optical system |
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2019
- 2019-06-12 CN CN201920879220.4U patent/CN210181223U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110109136A (en) * | 2019-06-12 | 2019-08-09 | 卡门哈斯激光科技（苏州）有限公司 | A kind of compact laser radar range finding optical system |
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