CN207457618U - A kind of laser lighting expands varifocal optical system - Google Patents
A kind of laser lighting expands varifocal optical system Download PDFInfo
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- CN207457618U CN207457618U CN201721279478.8U CN201721279478U CN207457618U CN 207457618 U CN207457618 U CN 207457618U CN 201721279478 U CN201721279478 U CN 201721279478U CN 207457618 U CN207457618 U CN 207457618U
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- varifocal optical
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Abstract
The utility model discloses a kind of laser lightings to expand varifocal optical system, including first fixed group, zoom group and afterwards fix group, fixed group is made of laser, the first lens, the second lens before described, the zoom group is made of the 3rd lens, fixed group is made of the 4th lens after described, spacing distance is equipped between each component and in same optical axis, the 3rd lens are axially movable；First lens are the positive meniscus lens of convex surface backward, and the second lens are positive lens, and the 3rd lens and the 4th lens are the positive meniscus lens of convex surface backward.The utility model provides a kind of three groups of four-piece types, focal length is 0.5 millimeter~50 millimeters, F numbers are 1.5 laser beam expanding varifocal optical system, not only realize expanding to the laser of different illumination distances requirement, it can adjust as requested again and expand angle, it solves that photovoltaic multi-pass, adjustment be difficult, the drawbacks such as of high cost, from the point of view of the application of product, works well.
Description
Technical field
The utility model belongs to optical design techniques field more particularly to a kind of laser lighting expands varifocal optical system.
Background technology
At present, with the fast development of semiconductor laser technique, laser beam expanding zoom lens with it is distinctive it is simple in structure,
Stable and reliable for performance, visual field converts the advantages such as fast, is more and more widely used in the video monitoring systems such as various night observations.
When Technology for Modern Equipment carries out far and near distance observation, the optical system expanded is illuminated using laser, is not only required in
Small field of view has illumination distances far ultraviolet, but also to meet the requirement that system expands spot size variation.Therefore this is solved
Problem becomes a research of technique problem in this field.
Utility model content
The purpose of this utility model is to provide a kind of three groups of four-piece types, and focal length is 0.5 millimeter~50 millimeters, and F numbers are 1.5
Laser beam expanding varifocal optical system is not only realized expanding to the laser of different illumination distances requirement, and can be adjusted as requested
It is whole to expand angle, solve that photovoltaic multi-pass, adjustment be difficult, drawback of high cost, from the point of view of the application of product, effect is good
It is good.
To achieve the above object, the technical solution adopted in the utility model is：A kind of laser lighting expands Zoom optical system
System, including first fixed group, zoom group and fix group afterwards, fixed group is made of laser, the first lens, the second lens before described,
The zoom group is made of the 3rd lens, and fixed group is made of the 4th lens after described, and spacer is equipped between each component
From and positioned in same optical axis, the 3rd lens are axially movable；First lens are the positive meniscus lens of convex surface backward,
Second lens are positive lens, and the 3rd lens and the 4th lens are the positive meniscus lens of convex surface backward.
Further, the wavelength of the laser is 808nm, 880nm or 915nm.
Further, focal length is 0.5 millimeter~50 millimeters, and the laser beam expanding varifocal optical system parameter that F numbers are 1.5 is such as
Under：
Compared with prior art, the utility model has the advantage of：The utility model provides a kind of three groups of four-piece types, focal length
For 0.5 millimeter~50 millimeters, F numbers are 1.5 laser beam expanding varifocal optical system, and focal length is realized by moving axially the 3rd lens
Consecutive variations, by the use of the 4th lens, fixed group realizes an aberration balancing for system under size field conditions after；Not only realization pair
The laser of different illumination distances requirement expands, and can adjust as requested and expand angle, solve photovoltaic multi-pass,
Adjustment is difficult, the drawbacks such as of high cost, from the point of view of the application of product, works well.According to said program deisgn product, structure letter
It is single, design is reasonable, not only meet the needs of equipment far and near distance observation, but meet system expand the use of spot size variation will
It asks.
Description of the drawings
It in order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, below will be to embodiment or existing
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments described in application, it is for those of ordinary skill in the art, small in the premise not made the creative labor,
It can also be obtained according to these attached drawings other attached drawings.
Fig. 1 show the structure diagram that the utility model laser lighting expands varifocal optical system short focus；
Fig. 2 show the structure diagram that the utility model laser lighting expands varifocal optical system focal length.
Specific embodiment
It is described in detail below in conjunction with the technical scheme in the embodiment of the utility model, it is clear that described reality
It is only the utility model part of the embodiment to apply example, instead of all the embodiments.Based on the embodiment in the utility model,
Ordinary people in the field's all other embodiments obtained on the premise of creative work is not made, belong to this practicality
Novel protected scope.
Join shown in Fig. 1, Fig. 2, a kind of laser beam expanding varifocal optical system that the utility model is created is emitted by laser 1
Optical axis on by the use of the combination of the first lens 2 and the second lens 3 as first fixed group, by the use of the 3rd lens 4 as zoom group, with
Four lens 5 fix group after being used as.Wherein the first lens 2 are the positive meniscus lens of convex surface backward, and the second lens 3 are positive lens, the
Three lens 4 and the 4th lens 5 are the positive meniscus lens of convex surface backward.
The wavelength that the wavelength of the laser 1 is is 808nm, 880nm or 915nm.
In use, the consecutive variations of focal length are realized by moving axially the 3rd lens 4, it is fixed after by the use of the 4th lens 5
Group realizes the aberration balancing of system under size field conditions.
Focal length is 0.5 millimeter~50 millimeters, and it is as follows that the laser lighting that F numbers are 1.5 expands varifocal optical system parameter：
According to said program, we devise the laser beam expanding zoom that a kind of wavelength is respectively 808nm, 880nm or 915nm
Optical system realizes expanding to the laser of different illumination distances requirement, and can adjust as requested and expand angle, solves
Photovoltaic multi-pass, adjustment be difficult, the drawbacks such as of high cost, in terms of the application of product, works well.
The above is only the specific embodiment of the application, it is noted that is the ordinary skill people of the art
For member, on the premise of the application principle is not departed from, several improvements and modifications can also be made, these improvements and modifications also should
It is considered as the protection domain of the application.
Claims (3)
1. a kind of laser lighting expands varifocal optical system, it is characterised in that：Including first fixed group, zoom group and afterwards fix group,
Fixed group is made of laser, the first lens, the second lens before described, and the zoom group is made of the 3rd lens, solid after described
Determine group to be made of the 4th lens, spacing distance is equipped between each component and in same optical axis, the 3rd lens can
Axial movement；First lens are the positive meniscus lens of convex surface backward, and the second lens are positive lens, and the 3rd lens and the 4th are thoroughly
Mirror is the positive meniscus lens of convex surface backward.
2. a kind of laser lighting according to claim 1 expands varifocal optical system, it is characterised in that：The laser
Wavelength is 808nm, 880nm or 915nm.
3. a kind of laser lighting according to claim 1 expands varifocal optical system, it is characterised in that：Focal length is 0.5 milli
Rice~50 millimeters, the laser beam expanding varifocal optical system parameter that F numbers are 1.5 are as follows：
。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721279478.8U CN207457618U (en) | 2017-09-30 | 2017-09-30 | A kind of laser lighting expands varifocal optical system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721279478.8U CN207457618U (en) | 2017-09-30 | 2017-09-30 | A kind of laser lighting expands varifocal optical system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207457618U true CN207457618U (en) | 2018-06-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201721279478.8U Active CN207457618U (en) | 2017-09-30 | 2017-09-30 | A kind of laser lighting expands varifocal optical system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114442293A (en) * | 2021-12-29 | 2022-05-06 | 河南中光学集团有限公司 | Laser illumination beam expanding and zooming optical system |
-
2017
- 2017-09-30 CN CN201721279478.8U patent/CN207457618U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114442293A (en) * | 2021-12-29 | 2022-05-06 | 河南中光学集团有限公司 | Laser illumination beam expanding and zooming optical system |
| CN114442293B (en) * | 2021-12-29 | 2023-09-12 | 河南中光学集团有限公司 | Laser illumination beam expansion zoom optical system |
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