CN1967309A - Projection type low-light night-vision visual system - Google Patents
Projection type low-light night-vision visual system Download PDFInfo
- Publication number
- CN1967309A CN1967309A CN 200510016040 CN200510016040A CN1967309A CN 1967309 A CN1967309 A CN 1967309A CN 200510016040 CN200510016040 CN 200510016040 CN 200510016040 A CN200510016040 A CN 200510016040A CN 1967309 A CN1967309 A CN 1967309A
- Authority
- CN
- China
- Prior art keywords
- projection
- visual system
- spectroscope
- projection objective
- screen
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Telescopes (AREA)
- Lenses (AREA)
Abstract
The invention discloses a night-vision glasses, which belongs to the visual optical system. The invention is of a six projection microscope objective lens. Against output wavelength of 546nm and the output surface of the effective diameter of 16mm, resolution of 60lp/mm image intensifier design. This invention is a projection lens for the ''straight look'' and ''see-through (enhanced)'' night-vision glasses visual projection system chart, including the image intensifier output surface of the projection lens, and the spectroscope back-to-screen. Visual projection system replaces the traditional eyepiece system, with lighter weight, smaller size, and better image quality visual system than the traditional eyepiece. This invention provides a brand new design ideas and concepts for the night-vision of the visual design of the optical system.
Description
Technical field
The present invention relates to a kind of lll night vision glasses, belong to the visual optical system of lll night vision.
Background technology
The lll night vision technology is one of night vision technology two big main pillars, claims the image intensifying technology again.Since the sixties in last century, along with improving constantly of image intensifier performance, the lll night vision technology has obtained fast development.From the Gulf War to the US-Iraq War, the effect of lll night vision technology is more and more paid attention to by people, and it is the key point of night fighting triumph.On the future battlefield, the lll night vision technology will play an increasingly important role.
In order to improve the night operations ability of army, the lll night vision technology is the technical field that developed country gives priority to always.The U.S. maintains the leading position in this field always.Till now, individual soldier's night-vision equipment developed into the 4th generation lll night vision glasses, enhancement mode night vision goggles and panorama night vision goggles.The 4th generation night vision goggles can under various conditions such as obnubilation starlight and daybreak at dusk, work.And the little overhang enhancement mode binocular night vision goggles of the AN/PVS-21 of U.S.'s development, when the scene that strengthens directly mirrored eyes, the wearer still can directly see the place ahead scene.Low-light visual field and direct-view visual field are superimposed, as run into bright light or the daylight that the image that makes enhancing does not see, and the wearer can Direct observation.The overhang of AN/PVS-21 night vision goggles is little, and center of gravity is low, has reduced wearer's neck burden, and has reduced the possibility that glasses bump other objects of extension.
Present domestic lll night vision technology is compared the also very big gap of existence with the development level and my army of advanced country such as America and Europe to the demand of high-performance low-light equipment.Its research and development level falls behind external about 15～20 years, and volume and weight is big, image quality is poor, distortion is greatly the main disadvantage of its optical system.Correspondingly, the equipment of my army and range of application also lag far behind the west.Except that application militarily, the lll night vision technology is in department's night patrol, law enforcements such as public security, People's Armed Police, the defendance of the night safe of enterprises and institutions, and industry and scientific research field all have vital application.
If use eyepiece system in the lll night vision system, so because eyepiece itself, visual field, distance of exit pupil and exit pupil diameter that correspondence is certain will have the camera lens aperture of a minimum.This point is irrelevant with design level, and no matter how good design also can't make eyepiece system reduce again.And in order to eliminate various aberrations, its volume and weight will be very big.
At present, U.S. Tenebraex company has developed color night vision press proof machine.The color night vision technology will make recognition speed improve, and identification error obviously reduces, and will replace monochromatic night vision technology future.And colour technology is higher to the requirement of visual system, and this must cause its volume and weight huger.Like this, volume is little, in light weight, the appearance of the novel visual system of good imaging quality, will have important application.
Summary of the invention
The objective of the invention is to replace original eyepiece system, thereby reduce the volume and weight of lll night vision system, and reach better image quality with the projection visual system.
The present invention has designed the projection objective of 6 mirrors, operation wavelength is the output wavelength (e light) of the image intensifier used of lll night vision, its design object is: exit pupil diameter 10mm, distance of exit pupil 25mm, field angle are that 40 °, image intensifier effectively show diameter 16mm, and resolving power is 60lp/mm.On the basis of a double gauss anamorphotic lens,, obtain 6 mirror projection objectives through merging and dialyte lens.These lens have reached design object fully.Its numerical example sees Table 1.
Table 1
| Surf | Type | Radius | Thickness | Glass |
| OBJ 1 2 3 4 5 6 STO 8 9 10 11 12 13 IMA | STANDARD STANDARD STANDARD STANDARD STANDARD STANDARD STANDARD STANDARD STANDARD STANDARD STANDARD STANDARD STANDARD STANDARD STANDARD | Infinity 26.94516 81.33987 12.09464 22.71989 15.91757 5.770754 Infinity -5.645666 -8.045068 -17.0427 -9.531873 18.96539 4555.986 Infinity | Infinity 3.663726 0.4746785 4.455883 2.663094 0.792157 1.885168 4.660129 0.9493569 0.4746785 4.158824 0.06076995 4.554903 8.416135 | TAF1 TAF1 F1 FD6 S-LAH58 TAF1 |
The technical scheme that the present invention is concrete:
This projection type visual system, comprise object plane, projection objective, spectroscope, back-to-screen screen, wherein projection objective comprises diaphragm, two negative lenses and 4 positive lenss, be characterized in: in the middle of diaphragm 1-4 is positioned at, respectively there are a slice negative lens 1-3 and 1-5 in its both sides, the outside respectively meets two positive lens 1-1,1-2,1-6 and 1-7 (Fig. 1) then.
Beneficial effect of the present invention: in the lll night vision glasses, the system that eyepiece system causes owing to the restriction of distance of exit pupil and exit pupil diameter seriously asymmetric, thereby must cause optical system that very big volume and weight is arranged, and very big aberration, especially distortion.Introduce the projection visual system, overcome the above shortcoming of eyepiece, the volume and weight of low-light night-vision visual system is reduced greatly, image quality significantly improves.The present invention has shown the incomparable advantage of traditional eyepiece system in the lll night vision glasses.The invention is characterized in and in the lll night vision glasses, introduce the projection visual system, utilize the symmetry and the characteristics that are easy to aberration correction (especially distortion) of projection objective, the visual system weight and volume of lll night vision glasses is all reduced greatly, and image quality significantly improves.The present invention lowers the center of gravity to reducing the overhang of night vision goggles, reduces wearer's neck burden, reduces night vision goggles and bumps the possibility of hanging other objects and all have vital role.It provides a kind of brand-new thought and notion for the visual system design of lll night vision glasses.
Description of drawings
Fig. 1 is the structural representation of projection objective of the present invention
Fig. 2 is the modulation transfer function curve of projection objective of the present invention in its " projection object plane " (image intensifier output face)
Fig. 3 is that bend and distortion curve the field of projection objective of the present invention in its " projection object plane " (image intensifier output face)
Fig. 4 is the point range figure of projection objective of the present invention in its " projection object plane " (image intensifier output face)
Fig. 5 is visual system structure 1 figure that the present invention makes direct viewing type lll night vision glasses
Fig. 6 is visual system structure 2 figure that the present invention makes direct viewing type lll night vision glasses
Fig. 7 is the visual system structural drawing that the present invention makes Clairvoyant type (enhancement mode) lll night vision glasses
Wherein: 1-1, positive lens 1-2, positive lens 1-3, negative lens 1-4, diaphragm 1-5, negative lens 1-6, positive lens 1-7, positive lens 1-8, projection object plane (image intensifier output surface) 5-1, image intensifier output surface 5-2, projection objective 5-3 shown in Figure 1, spectroscope 5-4, back-to-screen screen 5-5, the emergent pupil 6-1 of system, image intensifier output surface 6-2, projection objective 6-3 shown in Figure 1, spectroscope 6-4, back-to-screen screen 6-5, the emergent pupil 6-6 of system, back-to-screen screen 7-1, image intensifier output surface 7-2, projection objective 7-3 shown in Figure 1, spectroscope 7-4, back-to-screen screen 7-5, system's emergent pupil
Embodiment
The projection objective of the present invention's design comprises diaphragm, two negative lenses and 4 positive lenss, and Fig. 1 is the structural representation of projection objective of the present invention.Be characterized in: in the middle of diaphragm 1-4 was positioned at, respectively there were a slice negative lens 1-3 and 1-5 in its both sides, and the outside respectively meets two positive lens 1-1,1-2,1-6,1-7 then.Image planes 1-8 among Fig. 1 promptly places the output surface of image intensifier in actual use as projection object plane.Figure 24 is respectively MTF curve, in the wrong and distortion curve and the point range figures of object lens on the 1-8 face.Show among the figure that the MTF of this each visual field of projection objective all reaches (during 60lp/mm) more than 0.6 in projection object plane, maximum distortion has only the point range figure RMS diameter of 0.15%, 0,0.7,1.0 visual fields to have only 5.2,3.5,6.0 μ m respectively, satisfies request for utilization fully.This system can be keeping obtaining different distances of exit pupil under the constant substantially situation of picture element, to adapt to the needs of multi-form night vision goggles by appropriate change.
Projection visual system of the present invention comprises image intensifier output surface (object plane), projection objective, spectroscope and back-to-screen screen.The situation of " direct viewing type " night vision goggles at first is described, as shown in Figure 5: the image intensifier output surface is positioned over 5-1 position among the figure, and the image above it is through projection objective 5-2 imaging then.Emergent ray incides on the spectroscope 5-3.Place at spectroscope 5-3 and projection objective optical axis angle at 45.Light is through inciding after the spectroscope reflection on the back-to-screen screen 5-4.Back-to-screen screen is a kind of like this special material: can make and incide its surperficial light and return by former road.Back-to-screen among each figure shields not necessarily plane, can make different shape as required, and also can not bring additional distortion to imaging like this.Incide its surperficial light and return, see through spectroscope 5-3 then, arrive the human eye at emergent pupil 5-5 place along former road.Thereby the user just can see " real image " of the image on the image intensifier output surface that amplifies through projection.The night vision goggles of this " direct viewing type ", the user can only see the image on the image intensifier output surface.In order to increase the efficiency of light energy utilization, also can image pattern 6 such, place a back-to-screen screen again at the 6-6 place.
The structure of " Clairvoyant type (enhancement mode) " night vision goggles is as shown in Figure 7: the image intensifier output surface is positioned over 7-1 position among the figure, and the image above it is through projection objective 7-2 imaging then.Emergent ray incides on the spectroscope 7-3.Place at spectroscope 7-3 and projection objective optical axis angle at 45.Light incides on the back-to-screen screen 7-4 after seeing through spectroscope, reflects along former road then.Return and penetrate the human eye that enters the emergent pupil place after light is reflected by spectroscope 7-3.Like this, the user not only can see the image on the image intensifier output surface, can also see through the scenery that spectroscope 7-3 sees the external world, the place ahead.
For clarity sake, all projection objective is placed the human eye below among Fig. 5,6,7.In fact, projection objective can also be positioned over human eye top and both sides, and promptly each system is inverted or horizontal positioned among the figure, to adapt to the needs of different structure.Spectroscope among the figure also can be placed with projection objective optical axis angle not at 45, and this depends on the angle of projecting direction and projection objective optical axis.
Claims (10)
1. projection objective that is used for low-light night-vision visual system comprises diaphragm, two negative lenses, 4 positive lenss and image intensifier output surface.Be characterized in: in the middle of diaphragm 1-4 was positioned at, respectively there were a slice negative lens 1-3 and 1-5 in its both sides, and the outside respectively meets two positive lens 1-1,1-2,1-6,1-7 then.
2. according to the described projection objective system of claim 1, it is characterized in that: by suitable optimization, can obtain different distances of exit pupil, adapt to the needs of the lll night vision glasses of different structure and form.
3. " direct viewing type " visual system that is used for the lll night vision glasses comprises image intensifier output surface 5-1, projection objective 5-2, spectroscope 5-3 and back-to-screen screen 5-4.It is characterized in that: replace traditional eyepiece system with projection objective system, by the object lens projection, penetrate through spectroscope reflection and returning of back-to-screen screen, last light arrives human eye again with the output surface of image intensifier.The user just can see " real image " after the amplification.This visual system can realize the volume and weight littler than traditional eyepiece system, and reaches better image quality, especially optical distortion.
4. " direct viewing type " according to claim 3 projection visual system adds back-to-screen screen 6-6.It is characterized in that: can obtain than the higher efficiency of light energy utilization of the described projection visual system of claim 3.
5. according to claim 3,4 described " direct viewing type " projection visual system, its projection objective is positioned over the situation of eyes below, top, both sides.
6. according to claim 3,4,5 described " direct viewing type " projection visual system, its projection objective and spectroscope angulation are not 45 ° situation.
7. " Clairvoyant type (enhancement mode) " visual system that is used for the lll night vision system comprises image intensifier output surface 7-1, projection objective 7-2, spectroscope 7-3 and back-to-screen screen 7-4.It is characterized in that: replace traditional eyepiece system with projection objective, by the objective system projection, light sees through spectroscope, returns through the back-to-screen screen and penetrates and the spectroscope reflection with the output surface of image intensifier, and last light arrives human eye.The user not only can see " real image " after the amplification, can also see through spectroscope and see extraneous scene.In addition, this visual system can also realize the volume and weight littler than traditional eyepiece system, and reaches better image quality, especially optical distortion.
8. " Clairvoyant type (enhancement mode) " according to claim 7 projection visual system, its projection objective is positioned over the situation of eyes below, top, both sides.
9. according to claim 7,8 described " Clairvoyant type (enhancement mode) " projection visual system, its projection objective and spectroscope angulation are not 45 ° situation.
10. according to the projection visual system of claim 3,4,5,6,7,8,9 described monoculars or binocular structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510016040 CN1967309A (en) | 2005-11-14 | 2005-11-14 | Projection type low-light night-vision visual system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510016040 CN1967309A (en) | 2005-11-14 | 2005-11-14 | Projection type low-light night-vision visual system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1967309A true CN1967309A (en) | 2007-05-23 |
Family
ID=38076166
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510016040 Pending CN1967309A (en) | 2005-11-14 | 2005-11-14 | Projection type low-light night-vision visual system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1967309A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2106252A2 (en) * | 2008-05-16 | 2009-10-07 | Day & Night Display Systems, LLC | Night vision glasses |
| CN102224440A (en) * | 2008-11-25 | 2011-10-19 | Itt制造企业公司 | Flat field eyepiece |
| CN102236161A (en) * | 2010-04-30 | 2011-11-09 | 西安电子科技大学 | Direct-view low-light-level stereoscopic imaging night-vision device |
| CN103048770A (en) * | 2012-12-13 | 2013-04-17 | 中国航空工业集团公司洛阳电光设备研究所 | Small light low-light-level night vision eyepiece optical system |
| US8970962B2 (en) | 2008-03-13 | 2015-03-03 | Elbit Systems Ltd | Visor heads-up display |
| US9729767B2 (en) | 2013-03-22 | 2017-08-08 | Seiko Epson Corporation | Infrared video display eyewear |
| CN108629725A (en) * | 2017-03-20 | 2018-10-09 | 南京理工大学 | Low-light level night vision device imaging system effect emulation mode |
| CN110388594A (en) * | 2018-04-16 | 2019-10-29 | 黑拉有限责任两合公司 | Communication equipment for vehicle |
| US10488660B2 (en) | 2008-03-13 | 2019-11-26 | Everysight Ltd. | Wearable optical display system for unobstructed viewing |
| US11256094B2 (en) | 2008-03-13 | 2022-02-22 | Everysight Ltd. | Wearable optical display system for unobstructed viewing |
| US11513349B2 (en) | 2008-03-13 | 2022-11-29 | Everysight Ltd. | Optical see-through (OST) near-eye display (NED) system integrating ophthalmic correction |
-
2005
- 2005-11-14 CN CN 200510016040 patent/CN1967309A/en active Pending
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10488660B2 (en) | 2008-03-13 | 2019-11-26 | Everysight Ltd. | Wearable optical display system for unobstructed viewing |
| US11513349B2 (en) | 2008-03-13 | 2022-11-29 | Everysight Ltd. | Optical see-through (OST) near-eye display (NED) system integrating ophthalmic correction |
| US8970962B2 (en) | 2008-03-13 | 2015-03-03 | Elbit Systems Ltd | Visor heads-up display |
| US11256094B2 (en) | 2008-03-13 | 2022-02-22 | Everysight Ltd. | Wearable optical display system for unobstructed viewing |
| EP2106252A4 (en) * | 2008-05-16 | 2010-12-08 | Day & Night Display Systems Ll | Night vision glasses |
| US8830569B2 (en) | 2008-05-16 | 2014-09-09 | Elbit Systems Ltd. | Night vision glasses |
| EP2106252A2 (en) * | 2008-05-16 | 2009-10-07 | Day & Night Display Systems, LLC | Night vision glasses |
| CN102224440A (en) * | 2008-11-25 | 2011-10-19 | Itt制造企业公司 | Flat field eyepiece |
| CN102236161A (en) * | 2010-04-30 | 2011-11-09 | 西安电子科技大学 | Direct-view low-light-level stereoscopic imaging night-vision device |
| CN102236161B (en) * | 2010-04-30 | 2013-06-12 | 西安电子科技大学 | Direct-view low-light-level stereoscopic imaging night-vision device |
| CN103048770B (en) * | 2012-12-13 | 2016-06-22 | 中国航空工业集团公司洛阳电光设备研究所 | A kind of small light low-light-level night vision eyepiece optical system |
| CN103048770A (en) * | 2012-12-13 | 2013-04-17 | 中国航空工业集团公司洛阳电光设备研究所 | Small light low-light-level night vision eyepiece optical system |
| US10218884B2 (en) | 2013-03-22 | 2019-02-26 | Seiko Epson Corporation | Infrared video display eyewear |
| US9729767B2 (en) | 2013-03-22 | 2017-08-08 | Seiko Epson Corporation | Infrared video display eyewear |
| CN108629725A (en) * | 2017-03-20 | 2018-10-09 | 南京理工大学 | Low-light level night vision device imaging system effect emulation mode |
| CN110388594A (en) * | 2018-04-16 | 2019-10-29 | 黑拉有限责任两合公司 | Communication equipment for vehicle |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1967309A (en) | Projection type low-light night-vision visual system | |
| CN102495464B (en) | Digital low-light sighting telescope optical system | |
| CN104199178B (en) | A kind of zoom lens | |
| CN102967924B (en) | Optical lens | |
| CN1664649A (en) | Novel optical system of helmet display unit | |
| CN202916487U (en) | Visible light and infrared light confocal imaging optical lens with large image plane | |
| CN206400179U (en) | A kind of camera lens | |
| CN105676440A (en) | Portable large view field high definition bright telescoping zoom lens | |
| CN206920688U (en) | A kind of large aperture, the big angle of visual field, the optical lens of mega pixel | |
| CN208506352U (en) | It can be used for the portable camera lens that unmanned plane is shot on a large scale | |
| CN110376725A (en) | A kind of fish eye lens system | |
| CN109459838A (en) | The vehicle-mounted optical system of wide-angle high-resolution and imaging method | |
| CN219916058U (en) | Star projection lens | |
| CN204945480U (en) | Large target surface continuous zooming optical system | |
| CN106291910A (en) | It is applicable to the lightness eyepiece system of lll night vision mirror | |
| CN209014813U (en) | A kind of AR display equipment | |
| US2859654A (en) | Varifocal viewfinders | |
| CN202886719U (en) | Day and night lens with wide field of view, low distortion and high resolution | |
| CN103676151B (en) | A kind of Near-infrared Double view field imaging system with high permeability | |
| CN213903928U (en) | Confocal wide-spectrum athermalization mirror with large relative aperture | |
| CN205229556U (en) | Little volume optical system of long -focus heavy -calibre | |
| CN209606702U (en) | A kind of automatic Pilot navigation camera lens | |
| CN205157873U (en) | A glasses for penetration demonstration | |
| CN102866482A (en) | Fisheye infrared lens | |
| CN209343029U (en) | A kind of 3.2mm high definition bugeye lens |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |