CN207081888U - A kind of big exit pupil diameter airbome low light night vision peephole eyepiece - Google Patents
A kind of big exit pupil diameter airbome low light night vision peephole eyepiece Download PDFInfo
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- CN207081888U CN207081888U CN201720808692.1U CN201720808692U CN207081888U CN 207081888 U CN207081888 U CN 207081888U CN 201720808692 U CN201720808692 U CN 201720808692U CN 207081888 U CN207081888 U CN 207081888U
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Abstract
A kind of big exit pupil diameter airbome low light night vision peephole eyepiece, including one group of eyepiece system being made up of five pieces of lens and the diaphragm and display positioned at eyepiece system both sides.In eyepiece system, the first lens are biconvex positive power lens, and the second lens are concave-concave negative-power lenses, and the 3rd lens are biconvex positive power lens, and the 4th lens are biconvex positive power lens, and the 5th lens are the meniscus lens with negative power.Second, third lens, which fits together, forms balsaming lens group.There is the eyepiece system big 40 ° of visual field to be more than primitive eyepiece with big exit pupil diameter 12mm, exit pupil diameter.Lens use spherical mirror, simple in construction, save production finished product.Compared with existing eyepiece, in the case of high-quality image quality, man-machine efficacy is substantially increased.
Description
Technical field
Technical field of optical instrument is the utility model is related to, more particularly to a kind of driver's microlight night-viewing mirror eyepiece.
Background technology
Airbome low light night vision peephole is a kind of lll night vision imaging system using the helmet as carrier, and core missions are at night
Between faint light radiation be enhanced to degree required by normal vision, led to using light such as faint starlight, moonlight, airglows
Become the image that human eye can be observed clearly after crossing the amplification of opto-electronic conversion image intensifying technology, so as to realize under low light conditions to mesh
Mark is observed, and improves visual characteristic of the pilot under dark surrounds；It need not use secondary light source, overcome actively
The weakness that formula night observation device easily exposes itself.
Low-light night vision system eyepiece is further to amplify target image formed by the object lens on image intensifier display.It is micro-
The visual amplification of light night vision device optical system should be used cooperatively with the lll night vision object lens for having identical focal length.Because night vision goggles are hung
In the front end of the helmet, if weight is excessive, system gravity is caused to move forward, long-term use can damage to the cervical vertebra of pilot；
Meanwhile if visual field is too small, need left rotation and right rotation to observe in use, as matter is low, human eye vision can be caused tired, add work
Make load, reduce operating efficiency.In order to improve the man-machine efficacy of system, it is necessary to weigh the performance of each factor, it is desirable to airborne micro-
Light night vision peephole eyepiece will accomplish that system is smaller, lighter, visual field is bigger while good optical property is ensured, as matter more
It is excellent, it could so reduce the discomfort during user wears to greatest extent, obtain more high workload efficiency.
Utility model content
For problem above, the purpose of this utility model is to provide one kind on the premise of quality of optical imaging is ensured to go out greatly
Pupil diameter, low-light level night vision device eyepiece system simple in construction.
To achieve the above object, technical scheme is as follows used by the utility model：
A kind of big exit pupil diameter airbome low light night vision peephole eyepiece, including one group of eyepiece system and positioned at eyepiece system
The diaphragm and display of both sides, described diaphragm, eyepiece system and display are along optical axis direction spread configuration；The eyepiece system
Successively by the first lens L1, the second lens L2, the 3rd lens L3, the 4th lens L4 and on the direction of diaphragm to display
Five lens L5 are formed；The first described lens L1 is biconvex positive power lens, and the second lens L2 is concave-concave negative-power lenses,
3rd lens L3 is biconvex positive power lens, and the 4th lens L4 is biconvex positive power lens, and the 5th lens L5 is with negative
The meniscus lens of focal power；The lens L3 of second lens L2 the 3rd, which fit together, forms balsaming lens group.
The second lens L2 concave curvatures it is small and the 3rd lens L3 convex curvatures it is small while two curved surfaces song
Rate is equal, and two application of a surface make the second lens L2 and the 3rd lens L3 form balsaming lens group together.
The first lens L1 and the big convex surface of the 4th lens L4 curvature are towards diaphragm side.
The 5th lens L5 convex surface facing display side.
All lens diameters are equal in the eyepiece system, and all lens are spherical glass lens.
The display is that the effective input face of negative electrode is that Φ 18mm surpass two generation gleam image intensifier displays.
Excellent effect of the present utility model is：
The utility model uses the low-light eyepiece of spherical glass material in the case of guarantee is excellent as matter, meets well
At present for the demand of high imaging quality.Under low-light (level) environment, pupil diameter is about 7mm, and the eyepiece has larger emergent pupil
Diameter 12mm, 40 ° of visual field, solve angle pencil of ray, Off-axis aberrations Correction Problemss well.The utility model is simple in construction, just
In processing, production in enormous quantities can be realized.The utility model camera lens all eliminates angle pencil of ray band well using sphere, system
The aberration come, image quality is good, there is very high systemic resolution.Compared with existing eyepiece, in high-quality image quality situation
Under, substantially increase man-machine efficacy.
Brief description of the drawings
Fig. 1 is the utility model overall structure diagram.
Fig. 2 is the utility model light channel structure schematic diagram.
Marked in figure：1. diaphragm, 2. eyepiece systems, 3. displays.
Embodiment
The utility model is further described below in conjunction with the accompanying drawings.
As shown in figure 1, a kind of big exit pupil diameter airbome low light night vision peephole eyepiece of the utility model includes one group of eyepiece
System 2 and diaphragm 1 and display 3 positioned at the both sides of eyepiece system 2, described diaphragm 1, eyepiece system 2 and the edge of display 3
Optical axis direction spread configuration.The eyepiece system 2 is on diaphragm 1 to the direction of display 3 successively by the first lens L1, second
Lens L2, the 3rd lens L3, the 4th lens L4 and the 5th lens L5 compositions.The first described lens L1 is biconvex positive light coke
Lens, the second lens L2 are concave-concave negative-power lenses, and the 3rd lens L3 is biconvex positive power lens, and the 4th lens L4 is double
Convex positive power lens, the 5th lens L5 are the meniscus lens (i.e. meniscus) with negative power.
The second lens L2 concave curvatures it is small and the 3rd lens L3 convex curvatures it is small while two curved surfaces song
Rate is equal, and two application of a surface make the second lens L2 and the 3rd lens L3 form balsaming lens group together.Balsaming lens group is main
For the aberration in balance system, spherical aberration.The first lens L1 and the big convex surface of the 4th lens L4 curvature are towards diaphragm 1
Side.The 5th lens L5 convex surface facing the side of display 3.Spherical aberration, broom before 5th lens L5 is mainly used in balancing in system
Difference, the curvature of field, distortion.
All lens diameters are equal in the eyepiece system 2, and all lens are spherical glass lens.
The display 3 is that the effective input face of negative electrode is Φ 18mm, and resolution ratio surpasses the low-light image intensifying of two generations for 60lp/mm's
Device display.
When night vision is observed, human eye is located at the outside of diaphragm 1, after the light that the display 3 is sent is reflected by eyepiece system 2
Filtered into diaphragm 1, eventually enter into and be imaged on the retina of human eye.As shown in Fig. 2 the design through above-mentioned eyepiece system 2, system
The middle each face of lens, each material are arranged in pairs or groups mutually the various aberrations restricted in balance system, are optimized well overall as matter, mesh
The angle of visual field of mirror system is 40 °, exit pupil diameter 12mm, distance of exit pupil 15mm, when optical transfer function (MTF) is in space frequency
When rate is 40lp/mm, full filed reaches more than 0.4, is more than 0.5 on axle.
Preferred embodiment of the present utility model is the foregoing is only, it is all in this practicality not to limit the utility model
All any modification, equivalent and improvement made within new spirit and principle etc., should be included in guarantor of the present utility model
Within the scope of shield.
Claims (6)
1. a kind of big exit pupil diameter airbome low light night vision peephole eyepiece, including one group of eyepiece system (2) and positioned at eyepiece system
Unite the diaphragm (1) and display (3) of (2) both sides, described diaphragm (1), eyepiece system (2) and display (3) are along optical axis direction
Spread configuration；It is characterized in that：The eyepiece system (2) is on the direction of diaphragm (1) to display (3) successively by the first lens
L1, the second lens L2, the 3rd lens L3, the 4th lens L4 and the 5th lens L5 compositions；The first described lens L1 be biconvex just
Power lenses, the second lens L2 are concave-concave negative-power lenses, and the 3rd lens L3 is biconvex positive power lens, the 4th lens
L4 is biconvex positive power lens, and the 5th lens L5 is the meniscus lens with negative power；The second lens L2 the 3rd is saturating
Mirror L3, which fits together, forms balsaming lens group.
2. big exit pupil diameter airbome low light night vision peephole eyepiece according to claim 1, it is characterised in that：Described second
Lens L2 concave curvatures it is small with the 3rd lens L3 convex curvatures it is small while two curved surfaces curvature it is equal, two application of a surface
The second lens L2 and the 3rd lens L3 is set to form balsaming lens group together.
3. big exit pupil diameter airbome low light night vision peephole eyepiece according to claim 1, it is characterised in that：Described first
Lens L1 and the big convex surface of the 4th lens L4 curvature are towards diaphragm (1) side.
4. big exit pupil diameter airbome low light night vision peephole eyepiece according to claim 1, it is characterised in that：Described 5th
Lens L5 convex surface facing display (3) side.
5. the big exit pupil diameter airbome low light night vision peephole eyepiece according to claim 1,2,3 or 4, it is characterised in that：
All lens diameters are equal in the eyepiece system (2), and all lens are spherical glass lens.
6. big exit pupil diameter airbome low light night vision peephole eyepiece according to claim 1, it is characterised in that：The display
Device (3) is that the effective input face of negative electrode is that Φ 18mm surpass two generation gleam image intensifier displays.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720808692.1U CN207081888U (en) | 2017-07-06 | 2017-07-06 | A kind of big exit pupil diameter airbome low light night vision peephole eyepiece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720808692.1U CN207081888U (en) | 2017-07-06 | 2017-07-06 | A kind of big exit pupil diameter airbome low light night vision peephole eyepiece |
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| Publication Number | Publication Date |
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| CN207081888U true CN207081888U (en) | 2018-03-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201720808692.1U Active CN207081888U (en) | 2017-07-06 | 2017-07-06 | A kind of big exit pupil diameter airbome low light night vision peephole eyepiece |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU214280U1 (en) * | 2021-03-29 | 2022-10-19 | Открытое Акционерное Общество "Пеленг" | wide angle eyepiece |
-
2017
- 2017-07-06 CN CN201720808692.1U patent/CN207081888U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU214280U1 (en) * | 2021-03-29 | 2022-10-19 | Открытое Акционерное Общество "Пеленг" | wide angle eyepiece |
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