CN103913844A - Laser illuminator with uniform facula brightness - Google Patents
Laser illuminator with uniform facula brightness Download PDFInfo
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- CN103913844A CN103913844A CN201410140548.6A CN201410140548A CN103913844A CN 103913844 A CN103913844 A CN 103913844A CN 201410140548 A CN201410140548 A CN 201410140548A CN 103913844 A CN103913844 A CN 103913844A
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- laser
- filter
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- filter coating
- brightness
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Abstract
The invention discloses a laser illuminator with uniform facula brightness. The laser illuminator with the uniform facula brightness comprises a laser, a gradual filter and a battery of varifocus lenses which are sequentially arranged, the gradual filter and the battery of varifocus lenses are respectively located on an the optical axis of the laser, the gradual filter comprises a light-transmitting substrate, one surface of the light-transmitting substrate is coated with a filter coating, the filter coating is divided into a plurality of rings from the center to the periphery, and laser transmittance is sequentially increased from the central filter coating to the outermost ring of the filter coating. According to the laser illuminator with the uniform facula brightness, the gradual filter with the transmittance gradually changing from the center to the edge is adopted to achieve uniformity of faculae and obtain laser rays with the uniform facula brightness, and the problem in laser energy distribution that Gaussian distribution influences the night vision monitoring effect is solved. The laser illuminator with the uniform facula brightness has the advantages of being simple in structure, low in cost and easy to apply.
Description
Technical field
The present invention relates to a kind of laser illuminator.
Background technology
In prior art, no matter be semiconductor laser or fiber coupled laser diode, in the middle of its bright dipping hot spot exists there is the feature of obvious speckle in the dark and hot spot of bright limb, in the middle of when actual night vision illumination uses, bright part is easy to cause object overexposure, and the dark part in edge can cause object illumination inadequate, and the speckle of hot spot also can cause affecting night vision monitoring effect and night vision monitoring distance, for this reason, proposing one carries out in the middle of homogenize realization and the uniform method of both sides brightness to illumination light spot.
Summary of the invention
The technical problem to be solved in the present invention is: provide a kind of hot spot brightness uniform laser illuminator.
In order to solve the problems of the technologies described above, the present invention includes the laser instrument, gradual filter and the variable focus lens package that are arranged in order, gradual filter and variable focus lens package are all on the optical axis of laser instrument, gradual filter comprises printing opacity substrate, a surface of printing opacity substrate is coated with filter coating, filter coating is divided into multi-turn from the center to the periphery, and the successively change of laser transmittance from center filter coating to outmost turns filter coating is large.
Described filter coating is plated on the side of printing opacity substrate away from laser instrument.
Described laser instrument is fiber coupled laser diode or semiconductor laser.
For the ease of controlling the size of hot spot, the present invention includes housing, laser instrument and gradual filter are all fixed in housing, variable focus lens package is slidably arranged in housing, the glide direction of variable focus lens package and the optical axis direction of laser instrument in the same way, are provided with the drive motor that drives variable focus lens package to slide in housing.
The invention has the beneficial effects as follows: the present invention adopts the gradual filter of therefrom mind-set edge transmitance gradual change to realize the homogenize of hot spot, obtain the uniform laser of hot spot brightness, solved energy of lasers distribution and existed Gaussian distribution to affect the drawback of night vision monitoring effect.And the present invention is simple in structure, cost is low, is easy to application.
Brief description of the drawings
Fig. 1 is structural representation of the present invention;
Fig. 2 is index path of the present invention;
Fig. 3 is the structural representation enlarged drawing of part 3 in Fig. 1;
In figure: 1, housing, 2, laser instrument, 3, gradual filter, 4, drive motor, 5, variable focus lens package.3-1, the first filter coating, 3-2, the second filter coating, 3-3, the 3rd filter coating, 3-4, the 4th filter coating, 3-5, the 5th filter coating, 3-6, printing opacity substrate.
Embodiment
The uniform laser illuminator of hot spot brightness as shown in Figure 1, it comprises housing 1 and is successively set on the laser instrument 2 in housing, gradual filter 3 and variable focus lens package 5, gradual filter 3 and variable focus lens package 5 are all on the optical axis of laser instrument 2, as shown in Figure 3, gradual filter 3 comprises printing opacity substrate 3-6, a surface of printing opacity substrate 3-6 is coated with filter coating, filter coating is divided into multi-turn from the center to the periphery, be followed successively by the first filter coating 3-1, the second filter coating 3-2, the 3rd filter coating 3-3, the 4th filter coating 3-4 and the 5th filter coating 3-5, the laser transmittance of the first filter coating 3-1 is 20%, the transmitance of the laser of the second filter coating 3-2 is 40%, the laser transmittance of the 3rd filter coating 3-3 is 60%, the laser transmittance of the 4th filter coating 3-4 is 80%, the laser transmittance of the 5th filter coating 3-5 is 100%.Certainly filter coating also can be less than five circles or more than five circles, need only the successively change of laser transmittance from center filter coating to outmost turns filter coating greatly.
Laser instrument 2 and gradual filter 3 are all fixed in housing 1, and variable focus lens package 5 is slidably arranged in housing 1, and in the same way, housing 1 is provided with the drive motor 4 that drives variable focus lens package 5 to slide to the optical axis direction of the glide direction of variable focus lens package 5 and laser instrument 2.Laser instrument 2 is fiber coupled laser diode or semiconductor laser.Fiber coupled laser diode comprises laser generator, optical fiber and optical fiber head, and laser generator is connected by optical fiber with optical fiber head.Variable focus lens package 5 is prior aries, at least comprises beam expanding lens and focus lamp, is respectively used to expand and focus illumination laser.
Principle of work: as shown in Figure 2, in the middle of the hot spot of the laser that laser instrument 2 is launched, bright limb is dark, and when laser passes through gradual filter, the center transmitance low edge percent of pass of hot spot is high, and the hot spot brightness obtaining through gradual filter becomes more even.Then expand and focus on by variable focus lens package 5.
Claims (4)
1. the uniform laser illuminator of hot spot brightness, it is characterized in that: comprise the laser instrument, gradual filter and the variable focus lens package that are arranged in order, gradual filter and variable focus lens package are all on the optical axis of laser instrument, gradual filter comprises printing opacity substrate, a surface of printing opacity substrate is coated with filter coating, filter coating is divided into multi-turn from the center to the periphery, and the successively change of laser transmittance from center filter coating to outmost turns filter coating is large.
2. the uniform laser illuminator of hot spot brightness according to claim 1, is characterized in that: described filter coating is plated on the side of printing opacity substrate away from laser instrument.
3. the uniform laser illuminator of hot spot brightness according to claim 1 and 2, is characterized in that: described laser instrument is fiber coupled laser diode or semiconductor laser.
4. the uniform laser illuminator of hot spot brightness according to claim 3, it is characterized in that: include housing, laser instrument and gradual filter are all fixed in housing, variable focus lens package is slidably arranged in housing, the glide direction of variable focus lens package and the optical axis direction of laser instrument in the same way, are provided with the drive motor that drives variable focus lens package to slide in housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410140548.6A CN103913844A (en) | 2014-04-10 | 2014-04-10 | Laser illuminator with uniform facula brightness |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410140548.6A CN103913844A (en) | 2014-04-10 | 2014-04-10 | Laser illuminator with uniform facula brightness |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103913844A true CN103913844A (en) | 2014-07-09 |
Family
ID=51039653
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410140548.6A Pending CN103913844A (en) | 2014-04-10 | 2014-04-10 | Laser illuminator with uniform facula brightness |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103913844A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105203459A (en) * | 2015-10-23 | 2015-12-30 | 无锡溥汇机械科技有限公司 | Filter plate for hematology analyzer |
| CN109500500A (en) * | 2019-01-22 | 2019-03-22 | 沈阳仪表科学研究院有限公司 | A kind of production method of gradual change neutral-density filter |
| CN111336414A (en) * | 2020-03-16 | 2020-06-26 | 广东省半导体产业技术研究院 | Design method of uniform light spot and illumination device of uniform light spot |
| CN112666775A (en) * | 2020-11-06 | 2021-04-16 | 深圳市开玖自动化设备有限公司 | Coaxial light source imaging mechanism and lead bonding machine |
| CN113333973A (en) * | 2021-05-27 | 2021-09-03 | 湖北工业大学 | Laser beam modulation method and system for processing fiber material |
-
2014
- 2014-04-10 CN CN201410140548.6A patent/CN103913844A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105203459A (en) * | 2015-10-23 | 2015-12-30 | 无锡溥汇机械科技有限公司 | Filter plate for hematology analyzer |
| CN109500500A (en) * | 2019-01-22 | 2019-03-22 | 沈阳仪表科学研究院有限公司 | A kind of production method of gradual change neutral-density filter |
| CN111336414A (en) * | 2020-03-16 | 2020-06-26 | 广东省半导体产业技术研究院 | Design method of uniform light spot and illumination device of uniform light spot |
| CN112666775A (en) * | 2020-11-06 | 2021-04-16 | 深圳市开玖自动化设备有限公司 | Coaxial light source imaging mechanism and lead bonding machine |
| CN113333973A (en) * | 2021-05-27 | 2021-09-03 | 湖北工业大学 | Laser beam modulation method and system for processing fiber material |
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| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140709 |
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| WD01 | Invention patent application deemed withdrawn after publication |