CN102621677A - Ultraviolet varifocal imaging optical system - Google Patents
Ultraviolet varifocal imaging optical system Download PDFInfo
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- CN102621677A CN102621677A CN2012100801960A CN201210080196A CN102621677A CN 102621677 A CN102621677 A CN 102621677A CN 2012100801960 A CN2012100801960 A CN 2012100801960A CN 201210080196 A CN201210080196 A CN 201210080196A CN 102621677 A CN102621677 A CN 102621677A
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- ultraviolet
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Abstract
The invention relates to a non-continuous two-time zooming ultraviolet imaging optical system, which belongs to the technical field of optical instruments. In the ultraviolet imaging zooming system, a negative lens is adopted for zooming, fixing of an image position and calibration of chromatic aberration are kept simultaneously, and chromatic aberration correction is performed by using a back fixing group, so that the system imaging quality is high. The system has the advantages of capability of realizing non-continuous two-time zooming, high modulation transmission function (MTF) value, high system imaging quality, simple structure, small quantity of movement parts and high sensitivity, can be widely applied in the fields of corona discharge detection, fire disaster prevention, control and criminal investigation, and the like.
Description
Technical field
Ben Fanming belongs to the optical instrument technical field, relates to a kind of ultraviolet imagery optical system of discontinuous twice zoom, is specially adapted to corona discharge, forest fire detection and criminal investigation.
Background technology
Ultraviolet imagery technology becomes increasingly conspicuous in the effect of aspects such as electric power, criminal investigation and forest fire protection.As image device, mostly domestic existing ultraviolet imagery camera lens is to focus apart from camera lens, can not satisfy the increasing requirement to optical system, if desired to the specific range object image-forming, then focuses apart from camera lens and not necessarily can meet the demands, and image quality can be relatively poor.
The domestic technology similar with the present invention is utility model CN201020563108.9, and this system is the imaging system of fixed focal length, the requirement of the conversion focal length of can't satisfying the demand.
In order to overcome above-mentioned shortcoming; The ultraviolet imagery optical system of a kind of discontinuous twice zoom of ad hoc meter; Corona discharge applicable to power department detects; Also can be used for criminal investigation aspect etc., system architecture is simple, moving component is less, and two different focal higher modulation transfer function (MTF) value is arranged all.
Summary of the invention
The objective of the invention is to solve different distance place object is carried out under the ultraviolet imagery condition, focus, propose a kind of ultraviolet imagery optical system of discontinuous twice zoom apart from the object lens image quality problem that can not meet the demands.
The objective of the invention is to realize through following technical proposals.
The present invention is a kind of ultraviolet imagery optical system of discontinuous twice zoom, comprising: positive meniscus lens (1), movably double-concave negative lens (2), back fixation group (3) and detector image planes (4); On the direction of propagation of light, more than each optical element arranged in co-axial alignment in order successively.
Wherein, positive meniscus lens (1) is that front surface is that the surface is the positive meniscus lens of concave surface behind the convex surface, and movably double-concave negative lens (2) is used for moving change doubly, and back fixation group (3) is used for aberration is proofreaied and correct.
The concrete method for designing of the present invention is following:
1. in order to make the system can be than blur-free imaging at different image-forming ranges place; Adopt double-concave negative lens (2) movably in front and back fixing axial location participate in light path imaging respectively; As shown in Figure 2; And through the back fixation group (3) carry out aberration correction, and the back fixation group (3) need not to move, can keep the image planes stationkeeping motionless.In varifocal, make image quality higher, have higher mtf value, and the value of f-number F is less than 1.5, promptly optical system has than object lens of large relative aperture, is suitable for low-light level imaging.
2. in order to satisfy the condition of varifocal, the present invention adopts in optical imaging system movably that double-concave negative lens (2) becomes doubly, and image planes are fixed, and utilizes back fixation group (3) to carry out with regard to aberration correction, realizes the twice zoom.
Through above method for designing, the ultraviolet imagery optical system of a kind of discontinuous twice zoom of the present invention can be suitable for the ultraviolet light imaging of different image-forming ranges, and system architecture is simple, moving component is less, and has higher modulation transfer function (MTF) value.
Principle of work of the present invention: the UV radiation of infinite distance target emission passes through positive meniscus lens (1) successively, movably double-concave negative lens (2), back fixation group (3) and detector image planes (4) get picture to the end.Utilize movably double-concave negative lens (2) to move and become doubly, and utilize back fixation group (3) to carry out aberration correction, maintenance image planes stationkeeping in the time of zoom.
Beneficial effect
The present invention contrasts prior art and has following remarkable advantage: the present invention has adopted mobile negative lens to become doubly, and keeps the image planes stationkeeping simultaneously, finally obtains the ultraviolet imagery optical system of a discontinuous twice zoom.When changing focal length, make image quality higher, and the value of f-number F have bigger relative aperture less than 1.5.System architecture is simple, exercise group is less.Be particularly suitable for utilizing ultraviolet imagery to carry out in corona discharge detection and the fields such as fire prevention and criminal investigation.
Description of drawings
Fig. 1, Fig. 2 are the structural representations of the embodiment of the invention;
Fig. 1 is that system's light under short focal length moves towards synoptic diagram;
Fig. 2 is that system's light under long-focus moves towards synoptic diagram;
Fig. 3 is the prior art constructions synoptic diagram;
Among Fig. 1, fixation group, 4-detector image planes behind 1-positive meniscus lens, 2-double-concave negative lens, the 3-.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is further specified.
Embodiment such as Fig. 1, shown in Figure 2, the present invention will be mainly used in ultraviolet light imaging.Can be widely used in the fields such as corona discharge detection and fire prevention and criminal investigation.
Like Fig. 1, shown in Figure 2, the present invention is a kind of ultraviolet imagery optical system of discontinuous twice zoom, comprises positive meniscus lens (1), double-concave negative lens (2), back fixation group (3) and detector image planes (4); On the direction of propagation of light, more than each optical element arranged in co-axial alignment in order successively.
Among the embodiment, the UV radiation of infinite distance target emission shines on the detector element through behind above each optical element successively, gets picture to the end.
Among the embodiment, positive meniscus lens (1) is that front surface is that the surface be that the positive meniscus lens of concave surface, double-concave negative lens (2) are used for move becoming times and make the image planes holding position constant behind the convex surface, and back fixation group (3) is used for aberration correction.
Among the embodiment, adopt negative lens to move and become doubly, and make the image planes invariant position simultaneously, adopt the Zoom structure of less moving lens group, mainly contain following advantage:
1. optical system can be carried out discrete twice zoom, can select suitable focal length imaging for the different distance object, reduces the limited restriction of single fixed focal length blur-free imaging distance.
2. move negative lens group and participate in light path imaging respectively in different axial positions, under the state that other optical modules and follow-up imaging system are not moved, simplied system structure.
3. the twice zoom time, make image quality higher, and the value of f-number F has bigger relative aperture less than 1.5, be applicable to the faint light imaging, sensitivity is higher.
Claims (3)
1. discontinuous twice varifocal imaging optical system is characterized in that: comprise positive meniscus lens (1), movably double-concave negative lens (2), back fixation group (3) and detector image planes (4); On the direction of propagation of light, more than each optical element arranged in co-axial alignment in order successively; The UV radiation of infinite distance target emission shines on the detector element through behind each optical element successively, gets picture to the end.
2. a kind of ultraviolet varifocal imaging optical system according to claim 1; It is characterized in that: positive meniscus lens (1) is that front surface is that the surface is the positive meniscus lens of concave surface behind the convex surface; The negative lens of removable concave-concave (2) is used for moving change doubly; And keeping the image planes invariant position simultaneously, back fixation group (3) is used for aberration correction.
3. a kind of ultraviolet varifocal imaging optical system according to claim 1 is characterized in that:
1) in order to make the system can be than blur-free imaging at different image-forming ranges place; Utilize image exchange rule; Adopt mobile double-concave negative lens (2) to participate in light path imaging respectively in different axial positions; Need not to move back fixation group (3) and can keep the image planes stationkeeping motionless, carry out aberration correction through back fixation group (3) simultaneously, is that system has image quality preferably.System is in varifocal, and image quality is higher, has higher mtf value, and the value of f-number F has bigger relative aperture less than 1.5, is applicable to the faint light imaging.
2) in order to satisfy the condition of discontinuous twice varifocal; The present invention only needs to move double-concave negative lens (2) and just can become doubly in optical imaging system, and image planes are fixed, and back fixation group (3) need not move; It is certain that system's length overall keeps, and can realize the twice zoom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100801960A CN102621677A (en) | 2012-03-23 | 2012-03-23 | Ultraviolet varifocal imaging optical system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100801960A CN102621677A (en) | 2012-03-23 | 2012-03-23 | Ultraviolet varifocal imaging optical system |
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| CN102621677A true CN102621677A (en) | 2012-08-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012100801960A Pending CN102621677A (en) | 2012-03-23 | 2012-03-23 | Ultraviolet varifocal imaging optical system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108594408A (en) * | 2018-04-13 | 2018-09-28 | 北京理工大学 | The continuous big varifocal optical system of 15 times of hemispherical space visible light |
| CN108828782A (en) * | 2018-07-05 | 2018-11-16 | 钢研纳克检测技术股份有限公司 | High power focused light passages system and adjusting method are continuously adjusted for laser spot size |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10142498A (en) * | 1996-11-06 | 1998-05-29 | Nikon Corp | Objective for ultraviolet ray |
| CN102062932A (en) * | 2010-10-22 | 2011-05-18 | 中国航空工业集团公司洛阳电光设备研究所 | Uncooled double-field-of-view infrared optical system |
| CN201876596U (en) * | 2010-10-15 | 2011-06-22 | 安徽景全光电科技有限公司 | Ultraviolet lens |
-
2012
- 2012-03-23 CN CN2012100801960A patent/CN102621677A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10142498A (en) * | 1996-11-06 | 1998-05-29 | Nikon Corp | Objective for ultraviolet ray |
| CN201876596U (en) * | 2010-10-15 | 2011-06-22 | 安徽景全光电科技有限公司 | Ultraviolet lens |
| CN102062932A (en) * | 2010-10-22 | 2011-05-18 | 中国航空工业集团公司洛阳电光设备研究所 | Uncooled double-field-of-view infrared optical system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108594408A (en) * | 2018-04-13 | 2018-09-28 | 北京理工大学 | The continuous big varifocal optical system of 15 times of hemispherical space visible light |
| CN108828782A (en) * | 2018-07-05 | 2018-11-16 | 钢研纳克检测技术股份有限公司 | High power focused light passages system and adjusting method are continuously adjusted for laser spot size |
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Application publication date: 20120801 |