CN216052563U - Laser illuminator with adjustable central wavelength - Google Patents
Laser illuminator with adjustable central wavelength Download PDFInfo
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- CN216052563U CN216052563U CN202122748621.6U CN202122748621U CN216052563U CN 216052563 U CN216052563 U CN 216052563U CN 202122748621 U CN202122748621 U CN 202122748621U CN 216052563 U CN216052563 U CN 216052563U
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Abstract
The utility model discloses a laser illuminator with adjustable central wavelength, which comprises a lens barrel, and a cemented lens, a zoom group lens, a compensation group lens, a rear group lens and an optical fiber end surface which are respectively arranged in the lens barrel and are sequentially arranged from an object space to an image space along an optical axis, wherein the cemented lens is connected with a cemented lens position adjusting mechanism, the cemented lens position adjusting mechanism adjusts the position of the cemented lens in the lens barrel, the optical fiber end surface is connected with an optical fiber position adjusting mechanism, and the optical fiber position adjusting mechanism adjusts the position of the optical fiber end surface relative to the rear group lens. According to the utility model, the position adjusting mechanism of the cemented lens and the position adjusting mechanism of the optical fiber are added on the traditional laser lighting antenna, and under the condition that lasers with different wavelengths need to be replaced, the whole process of laser facula is clear only by adjusting the positions of the cemented lens and the end surface of the optical fiber and carrying out fine adjustment back and forth, so that the central wavelength can be adjusted.
Description
Technical Field
The utility model relates to the field of laser night vision monitoring, in particular to a laser illuminator which can adapt to lasers with different wavelengths, namely, the laser illuminator with adjustable central wavelength.
Background
Night video monitoring is an important component of security monitoring, in order to realize monitoring of a dark environment in a dark or weak light environment, an active light source is generally required to be used for light supplement, and laser becomes a first choice for remote light supplement illumination due to good directivity of the laser. The semiconductor optical fiber coupling laser of near infrared wave bands such as 810nm, 860nm, 940nm and the like has the advantages of high photoelectric conversion efficiency, low cost, long service life and the like, and becomes a mainstream illumination light source of a remote monitoring system. The laser illuminator consists of a laser and a laser illuminating lens. The laser has good monochromaticity, the influence of chromatic aberration is hardly considered, so the complexity of the laser lens is greatly reduced, the laser illuminators on the market are designed only aiming at a single central wavelength at present, and when the wavelengths are changed into other wavelengths, the transmittance and the facula effect are reduced to different degrees. Even if the light spot effect under a certain angle is ensured by adjusting the position of the optical fiber, the whole-course definition of the laser light spot can not be realized. In the application of laser night vision or other active lighting, the situation that light sources are uncertain or light sources with different wavelengths are changed midway in a test often exists, the traditional laser illuminator can meet the requirement only by changing a cam curve or redesigning and manufacturing a laser illuminating lens, the cost is undoubtedly greatly increased, if the traditional laser illuminator can be simply adjusted, the illuminator can be conveniently and quickly adapted to the light sources with different wavelengths, the time is greatly saved, the cost is reduced, and the laser illuminator with similar functions does not appear at present.
Disclosure of Invention
Aiming at the phenomenon that the adaptive wavelength of the traditional laser illuminator is fixed at present, the utility model provides the laser illuminator with the adjustable central wavelength, which has the advantages of convenient debugging and simple structure and can effectively enlarge the application range of a laser illuminating lens.
In order to solve the technical problem, the technical scheme adopted by the utility model is as follows: the utility model provides a center wavelength adjustable laser illuminator, includes the lens cone, set up respectively in the lens cone along the glued lens that the optical axis set gradually from the object space to the image space, zoom group lens, compensation group lens, back group lens and optic fibre terminal surface, the glued lens is connected with glued lens position control mechanism, the position of glued lens in the lens cone is adjusted to glued lens position control mechanism, the optic fibre terminal surface is connected with optic fibre position control mechanism, optic fibre position control mechanism adjusts the position of the relative back group lens of optic fibre terminal surface.
Furthermore, the cemented lens position adjusting mechanism comprises a cemented lens frame, a fixing bolt hole and a jackscrew, the cemented lens frame is in threaded fit with the lens barrel, the fixing bolt hole is formed in the lens barrel outside the cemented lens frame, and the jackscrew penetrates through the fixing bolt hole and then is jacked on the cemented lens frame.
Furthermore, the optical fiber position adjusting mechanism comprises an optical fiber connecting piece, an optical fiber fixing piece, a bolt and a gasket, wherein the optical fiber connecting piece is connected with the end face of the optical fiber, the optical fiber connecting piece is fixed on the optical fiber fixing piece through the bolt, the optical fiber fixing piece is installed on the lens cone, and the gasket is arranged between the free end of the bolt and the optical fiber fixing piece.
Furthermore, the front end of the lens cone is conical, and the cemented lens is arranged at the position with the largest caliber of the lens cone.
Furthermore, the surface of the glued mirror bracket is provided with a groove.
Further, the focal length f =9-100mm of the optical system, the clear aperture D =54mm, and the total length of the optical system is 130 mm.
Furthermore, the adjustable wavelength range meets the condition that lambda is more than or equal to 800nm and less than or equal to 950 nm.
Further, the adjustment range of the cemented lens is 0.5 mm.
The utility model has the beneficial effects that: according to the utility model, the position adjusting mechanism of the cemented lens and the position adjusting mechanism of the optical fiber are added on the traditional laser lighting antenna, under the condition that lasers with different wavelengths need to be replaced, the whole process of laser facula is clear only by adjusting the positions of the cemented lens and the end surface of the optical fiber and carrying out fine adjustment back and forth, the central wavelength is adjustable, the debugging process is simple, the cost is low, the structure is small and exquisite, and meanwhile, the application range of a single laser lighting lens is greatly improved.
Drawings
FIG. 1 is an overall cross-sectional view of the present invention;
FIG. 2 is a schematic sectional view of the front end adjusting device of the laser lighting lens;
1. the optical fiber lens comprises a cemented lens, 2, a variable power lens group, 3, a compensation lens group, 4, a rear lens group, 5, an adjustable cemented lens frame, 6, a variable power lens frame, 7, a compensation lens frame, 8, a rear lens frame, 9, a lens cone, 10, an optical fiber end face, 11, a transmission rod, 12, a sliding sleeve, 13 fixing screw holes, 14, a pressing ring, 15, an optical fiber connecting piece, 16, an optical fiber fixing piece, 17 and a bolt.
Detailed Description
The utility model is further described with reference to the following figures and specific embodiments.
Example 1
The embodiment discloses a laser illuminator with an adjustable center wavelength, as shown in fig. 1, which includes a lens barrel 9, and a cemented lens 1, a power variable group lens 2, a compensation group lens 3, a rear group lens 4 and an optical fiber end surface 10, which are respectively arranged in the lens barrel 9 and sequentially arranged from an object side to an image side along an optical axis, wherein laser of the laser starts from the optical fiber end surface 10 and sequentially passes through the rear group lens 4, the compensation group lens 3 and the power variable group lens 2, and laser spots are formed on the front surface of the cemented lens 1. The lenses of the optical system are all fixed by corresponding lens frames, specifically, the cemented lens 1 is fixed by an adjustable cemented lens frame 5, the variable power group lens 2 is fixed by a variable power group lens frame 6, the compensation group lens 3 is fixed by a compensation group lens frame 7, the rear group lens 4 is fixed by a rear group lens frame 8, and all the lens frames are fixed by an outer lens barrel 9. The outside of the spectacle frame for fixing the variable power lens group 2 and the compensation lens group 3 is connected with a transmission rod 11, the transmission rod 11 is controlled by a sliding sleeve 12 to slide in a cam curve mode, and the distance and the position between the variable power lens group 2 and the compensation lens group 3 are changed, so that zooming is realized, and the size of a light spot is changed.
In order to be suitable for lasers with different wavelength types, the cemented lens 1 is connected with a cemented lens position adjusting mechanism which adjusts the position of the cemented lens in the lens barrel, and the optical fiber end surface 10 is connected with an optical fiber position adjusting mechanism which adjusts the position of the optical fiber end surface relative to the rear group of lenses.
Specifically, the cemented lens position adjusting mechanism comprises a cemented lens frame 5, a fixing bolt hole 13 and a jackscrew, the cemented lens 1 is fixed on the cemented lens frame through a clamping ring 14, the cemented lens frame 5 is in threaded fit with a lens barrel 9, the fixing bolt hole 13 is formed in the lens barrel 9 outside the cemented lens frame 5, and the jackscrew penetrates through the fixing bolt hole 13 and then is jacked on the cemented lens frame 5. For convenience of adjustment, the surface of the glued mirror bracket 5 is provided with a groove, so that the glued mirror bracket can be conveniently rotated by different angles.
The optical fiber position adjusting mechanism comprises an optical fiber connecting piece 15, an optical fiber fixing piece 16, a bolt 17 and a gasket, wherein the optical fiber connecting piece 15 is connected with the optical fiber end face 10, the optical fiber connecting piece 15 is fixed on the optical fiber fixing piece 16 through the bolt 17, the optical fiber fixing piece 16 is installed on the lens cone 9, the gasket is arranged between the free end of the bolt and the optical fiber fixing piece, and the distance between the optical fiber end face 10 and the rear group lens 4 is changed by adjusting the quantity of the gasket.
In this embodiment, the front end of the lens barrel 9 is conical, and the cemented lens 1 is installed at the position where the aperture of the lens barrel is the largest. The front end of the lens is changed into a cone shape from the previous cylinder type rotating lens cone, so that the whole volume is reduced.
The parameters of the laser illuminator in this embodiment are: the focal length f =9-100mm of the optical system, the clear aperture D =54mm, and the total length of the optical system is 130 mm. The adjustable wavelength range meets the condition that lambda is more than or equal to 800nm and less than or equal to 950 nm. The adjustment range of the cemented lens is 0.5 mm.
After replacing the laser without wavelength, firstly adjusting the illuminator to the maximum light spot, finely adjusting the position of the optical fiber end face 10 to enable the illuminator to be slightly close to or far away from the rear group lens 4 in the optical axis direction until the maximum light spot of the illuminator presents a clear edge state, fixing the position of the optical fiber end face 10, then adjusting the laser to the minimum light spot, irradiating a far target, rotating the cemented mirror frame 5 to enable the cemented mirror frame to drive the cemented mirror 1 to axially move, enabling the maximum moving range of the mirror to be 0.5mm, enabling the edge of the minimum light spot of the laser to present a sharp state by rotating the cemented mirror frame 5, screwing the jackscrew into the fixed screw hole 13 and screwing the jackscrew down to enable the position of the cemented mirror frame 5 to be fixed, and after the adjustment, enabling the light spots of the laser illuminator to be kept in a uniform and sharp edge state in the whole course. And when the wavelength of the light source is changed again, repeating the steps.
The foregoing description is only for the basic principle and the preferred embodiments of the present invention, and modifications and substitutions by those skilled in the art are included in the scope of the present invention.
Claims (8)
1. The utility model provides a center wavelength adjustable laser illuminator, includes the lens cone, sets up respectively in the lens cone follow the glued lens that the optical axis set gradually from the object space to the image space, zoom group's lens, compensation group's lens, back group's lens and optic fibre terminal surface, its characterized in that: the cemented lens is connected with a cemented lens position adjusting mechanism which adjusts the position of the cemented lens in the lens barrel, the optical fiber end surface is connected with an optical fiber position adjusting mechanism which adjusts the position of the optical fiber end surface relative to the rear group lens.
2. A center wavelength tunable laser illuminator according to claim 1, wherein: the cemented lens position adjusting mechanism comprises a cemented lens frame, a fixing bolt hole and a jackscrew, the cemented lens is fixed on the cemented lens frame through a pressing ring, the cemented lens frame is in threaded fit with the lens barrel, the fixing bolt hole is formed in the lens barrel outside the cemented lens frame, and the jackscrew penetrates through the fixing bolt hole and then props against the cemented lens frame.
3. A center wavelength tunable laser illuminator according to claim 1, wherein: the optical fiber position adjusting mechanism comprises an optical fiber connecting piece, an optical fiber fixing piece, a bolt and a gasket, wherein the optical fiber connecting piece is connected with the end face of an optical fiber, the optical fiber connecting piece is fixed on the optical fiber fixing piece through the bolt, the optical fiber fixing piece is installed on the lens cone, and the gasket is arranged between the free end of the bolt and the optical fiber fixing piece.
4. A center wavelength tunable laser illuminator according to claim 1, wherein: the front end of the lens cone is conical, and the cemented lens is arranged at the position with the largest caliber of the lens cone.
5. A center wavelength tunable laser illuminator according to claim 2, wherein: the surface of the glued mirror bracket is provided with a groove.
6. A center wavelength tunable laser illuminator according to claim 1, wherein: the focal length f =9-100mm of the optical system, the clear aperture D =54mm, and the total length of the optical system is 130 mm.
7. A center wavelength tunable laser illuminator according to claim 1, wherein: the adjustable wavelength range meets the condition that lambda is more than or equal to 800nm and less than or equal to 950 nm.
8. A center wavelength tunable laser illuminator according to claim 1, wherein: the adjustment range of the cemented lens is 0.5 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122748621.6U CN216052563U (en) | 2021-11-11 | 2021-11-11 | Laser illuminator with adjustable central wavelength |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122748621.6U CN216052563U (en) | 2021-11-11 | 2021-11-11 | Laser illuminator with adjustable central wavelength |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216052563U true CN216052563U (en) | 2022-03-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122748621.6U Active CN216052563U (en) | 2021-11-11 | 2021-11-11 | Laser illuminator with adjustable central wavelength |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216052563U (en) |
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2021
- 2021-11-11 CN CN202122748621.6U patent/CN216052563U/en active Active
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