CN218099615U - Laser coaxial range finder - Google Patents
Laser coaxial range finder Download PDFInfo
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- CN218099615U CN218099615U CN202222111208.3U CN202222111208U CN218099615U CN 218099615 U CN218099615 U CN 218099615U CN 202222111208 U CN202222111208 U CN 202222111208U CN 218099615 U CN218099615 U CN 218099615U
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Abstract
The utility model provides a coaxial distancer of laser, it adopts the coaxial mode of transmitting terminal and receiving terminal, realizes laser rangefinder, does benefit to narrow regional engineering measurement, and its is with low costs. The device comprises a laser, a reflector, a lens and a detector; the lens comprises a first surface and a second surface; the through hole has been seted up at the mirror surface center of speculum, the laser instrument is arranged in the through hole and is fixed the setting, the output beam of laser instrument passes through the central part towards lens after passing through, the output beam passes through the first surface of lens in order, second surface collimation back directive rear to the object of awaiting measuring, after being measured the light diffuse reflection after the object with the range finding collimates the second surface of lens in order, the peripheral region of first surface, converge towards the reflection surface of the radial periphery of speculum, the speculum forms an acute angle inclination relative to the output beam and arranges, the top of speculum is provided with the detector, the diffuse reflection that the detection terminal surface receiving speculum reflected of detector gathers the light beam.
Description
Technical Field
The utility model relates to a technical field of laser specifically is a coaxial distancer of laser.
Background
The existing laser range finder is provided with a transmitting end and a receiving end, laser emitted by the transmitting end and light received by the receiving end are not coaxially arranged, an additional light bias element needs to be arranged, the size of the whole device is increased, the range finder after the size is increased is not suitable for measurement in narrow areas, and therefore the range finder with small size needs to be researched and developed.
Disclosure of Invention
To the above problem, the utility model provides a coaxial distancer of laser, it adopts the coaxial mode of transmitting terminal and receiving terminal, realizes laser rangefinder, does benefit to narrow regional engineering measurement, and its is with low costs.
A laser coaxial rangefinder, comprising:
a laser;
a mirror;
a lens comprising a first surface, a second surface;
and a detector;
the laser device is fixedly arranged in the through hole, an output light beam of the laser device penetrates through the through hole and then faces to the central part of the lens, the output light beam is collimated by the first surface and the second surface of the lens in sequence and then faces to a rear object to be measured, the collimated light is subjected to diffuse reflection by the object to be measured and then sequentially passes through the second surface and the peripheral area of the first surface of the lens and the reflecting surface which is converged to the radial periphery of the reflector, the reflector forms an acute-angle inclination angle arrangement relative to the output light beam, the detector is arranged above the reflector, and the detection end face of the detector receives the diffuse reflection convergent light beam reflected by the reflector.
It is further characterized in that:
the light outlet of the laser and the center position of the through hole of the reflector are overlapped;
the height between the detection end face of the detector and the output light beam is H, the distance between the central position of the reflector and the lens is L, the focal length of the lens is f, and f = H + L;
the lens is a biconvex lens or a plano-convex lens;
the mirror is disposed at an angle of 35-65 with respect to the output beam.
After the structure of the utility model is adopted, the output light beam of the laser is emitted out through the through hole at the central position of the reflector, and then is collimated by the lens to be used as the transmitting end of the laser range finder, the light beam reflected back by diffuse reflection is the receiving light beam, and the receiving light beam is converged at the detector to detect the light energy through the lens and then reflected by the reflector to be used as the receiving end of the laser range finder; the timing device in the whole device records the round trip time of the light beam, and half of the product of the light speed and the round trip time is the distance between the distance meter and the object to be measured.
Drawings
FIG. 1 is a schematic, diagrammatic view of an embodiment of the present invention;
the names corresponding to the numbers in the figure are as follows:
the laser device comprises a laser 1, a reflector 2, a lens 3, a detector 4, a first surface 31, a second surface 32, a through hole 21, a detection end face 41, a shell 5 and a through hole 51.
Detailed Description
A laser coaxial distance measuring instrument comprises a sketch 1, a laser 1, a reflector 2, a lens 3 and a detector 4; the lens 3 comprises a first surface 31, a second surface 32;
the center of the mirror surface of the reflector 2 is provided with a through hole 21, the laser 1 is fixedly arranged in the through hole 21, the output light beam of the laser 1 penetrates through the through hole and then faces the central part of the lens 3, the output light beam is collimated by the first surface 31 and the second surface 32 of the lens 3 in sequence and then irradiates to a rear object to be measured, the collimated light is diffusely reflected by the object to be measured and then sequentially passes through the second surface, the peripheral area of the first surface and the reflecting surface converged to the radial periphery of the reflector, the reflector 2 forms an acute-angle inclination angle arrangement relative to the output light beam, a detector 4 is arranged above the reflector 2, and the detection end surface of the detector 4 receives the diffusely-reflected converged light beam reflected by the reflector 2.
In specific implementation, the light outlet of the laser 1 is overlapped with the center position of the through hole 21 of the reflector 2;
the height between the detection end face 41 of the detector 4 and the output light beam is H, the distance between the central position of the reflector 2 and the lens 3 is L, the focal length of the lens is f, and f = H + L;
the lens 3 is specifically a biconvex lens or a plano-convex lens;
the mirror 2 is arranged at an angle of 35-65 with respect to the output beam.
In a specific embodiment, the range finder further comprises a shell 5, wherein the shell 5 is provided with a through hole 51 corresponding to the area of the second surface 32 of the lens, and the emitted light beam and the received light beam enter or exit the range finder through the through hole 51; the wavelength of the laser 1 is 905nm; the reflector 2 is a circular mirror, and a through hole is formed in the radial center of the reflector; the focal length of the lens 3 is 50mm; the detector 4 is an APD photodetector.
The working principle is as follows: the output light beam of the laser is emitted out after passing through a through hole at the central position of the reflector, and then is collimated by the lens to be used as the emitting end of the laser range finder, the light beam reflected back by diffuse reflection is a receiving light beam, and the receiving light beam is reflected by the lens and the reflector to converge on the detector 4 to detect light energy to be used as the receiving end of the laser range finder; the timing device in the whole device records the round trip time of the light beam, and half of the product of the light speed and the round trip time is the distance between the distance meter and the object to be measured.
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.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (5)
1. A laser coaxial rangefinder, comprising:
a laser;
a mirror;
a lens comprising a first surface, a second surface;
and a detector;
the laser device is fixedly arranged in the through hole, an output light beam of the laser device penetrates through the through hole and then faces to the central part of the lens, the output light beam is collimated by the first surface and the second surface of the lens in sequence and then faces to a rear object to be measured, the collimated light is subjected to diffuse reflection by the object to be measured and then sequentially passes through the second surface and the peripheral area of the first surface of the lens and the reflecting surface which is converged to the radial periphery of the reflector, the reflector forms an acute-angle inclination angle arrangement relative to the output light beam, the detector is arranged above the reflector, and the detection end face of the detector receives the diffuse reflection convergent light beam reflected by the reflector.
2. A laser coaxial rangefinder as claimed in claim 1, wherein: the light outlet of the laser and the center position of the through hole of the reflector are overlapped.
3. A laser coaxial rangefinder as claimed in claim 1, wherein: the height between the detection end face of the detector and the output light beam is H, the distance between the central position of the reflector and the lens is L, the focal length of the lens is f, and f = H + L.
4. A laser coaxial rangefinder as claimed in claim 1, wherein: the lens is specifically a biconvex lens or a plano-convex lens.
5. A laser coaxial rangefinder as claimed in claim 1, wherein: the mirror is disposed at an angle of 35-65 relative to the output beam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222111208.3U CN218099615U (en) | 2022-08-11 | 2022-08-11 | Laser coaxial range finder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222111208.3U CN218099615U (en) | 2022-08-11 | 2022-08-11 | Laser coaxial range finder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218099615U true CN218099615U (en) | 2022-12-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222111208.3U Active CN218099615U (en) | 2022-08-11 | 2022-08-11 | Laser coaxial range finder |
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| CN (1) | CN218099615U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117491976A (en) * | 2023-12-27 | 2024-02-02 | 武汉灵途传感科技有限公司 | Transmit-receive coaxial laser detection system, adjusting method thereof and laser radar |
-
2022
- 2022-08-11 CN CN202222111208.3U patent/CN218099615U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117491976A (en) * | 2023-12-27 | 2024-02-02 | 武汉灵途传感科技有限公司 | Transmit-receive coaxial laser detection system, adjusting method thereof and laser radar |
| CN117491976B (en) * | 2023-12-27 | 2024-04-02 | 武汉灵途传感科技有限公司 | Transmit-receive coaxial laser detection system, adjusting method thereof and laser radar |
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