CN204256245U - Optical system - Google Patents
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- CN204256245U CN204256245U CN201420736645.7U CN201420736645U CN204256245U CN 204256245 U CN204256245 U CN 204256245U CN 201420736645 U CN201420736645 U CN 201420736645U CN 204256245 U CN204256245 U CN 204256245U
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Abstract
The utility model provides a kind of optical system, comprise the first lens, the second lens, the 3rd lens, the 4th lens, the 5th lens, the 6th lens, the 7th lens, the 8th lens and the image planes that coaxially arrange successively from object plane to image planes, between the 3rd lens and the 4th lens, be provided with diaphragm, the 8th is provided with optical filter between lens and image planes.The utility model has ultra high-definition, large aperture, large target surface, small size, low cost, day and night shared function, easy to use, is mainly used in monitoring, the aspects such as photograph, onboard system.
Description
Technical field
The utility model relates to a kind of optical technology, particularly, relates to a kind of optical system.
Background technology
The shortcoming that current monitoring, photograph, vehicle-mounted Large visual angle or medium visual field camera lens ubiquity are such: resolution is low; Volume is large; Aperture is little; Cost is higher; And great majority all can only use when visible spectrum.Only having now minority camera lens, go to improve in certain in the otherwise situation of sacrifice, such as in order to realize high resolving power, volume will be become large, or increase lens number causing high expensive.
Also do not overcome now the camera lens of above whole shortcoming, so now popular on market monitoring, shooting, vehicle-mounted large, medium visual field camera lens, while cost is high, or resolution is lower, or volume is larger, or photosensitive insufficient strength, or can only use when visible spectrum, captured image is that overall sharpness or the acutance of picture are all not ideal enough, this has very large inconvenience in use, can not meet consumer convenient to observe, inexpensive, day and night the needs such as to share.
Utility model content
For defect of the prior art, the purpose of this utility model is to provide a kind of optical system, and it has ultra high-definition, large aperture, large target surface, small size, low cost, day and night shared function, easy to use.
According to an aspect of the present utility model, a kind of optical system is provided, it is characterized in that, comprise the first lens, the second lens, the 3rd lens, the 4th lens, the 5th lens, the 6th lens, the 7th lens, the 8th lens and the image planes that coaxially arrange successively from object plane to image planes, between the 3rd lens and the 4th lens, be provided with diaphragm, the 8th is provided with optical filter between lens and image planes.
Preferably, described first lens are meniscus lens, and its two sides all bends towards diaphragm, and its focal length is negative.
Preferably, described second lens are meniscus lens, and its two sides all bends towards diaphragm, and its focal length is negative.
Preferably, described 3rd lens are lenticular lens, and its focal length is just.
Preferably, described 4th lens are double concave type lens, and its focal length is negative.
Preferably, described 5th lens are lenticular lens, and its focal length is just.
Preferably, described 6th lens are lenticular lens, and its focal length is negative.
Preferably, described 7th lens are meniscus lens, its two sides diaphragm all dorsad, and its focal length is negative.
Preferably, the lensed material of described first lens, the second lens, the 3rd lens, the 4th lens, the 5th lens, the 6th lens, the 7th lens, the 8th lens is optical glass, and lens face type is spherical.
Compared with prior art, the utility model has following beneficial effect:
One, camera lens of the present utility model is a ultra high-definition camera lens, and resolution reaches 1,000 ten thousand pixels, and can meet the resolution of the 4K*2K of monitoring forefront now completely, lens edge resolution is also very high, and whole image planes can become sharply defined image; Existing large, medium visual field camera lens high definition resolution is generally below 2,000,000 pixels, and edge resolution is low, and whole image sharpness is inconsistent.
Two, the aperture of camera lens of the present utility model is large, aperture design load can reach F1.4, can meet blur-free imaging under low-light (level) very well, and existing similar lens aperture generally (illustrates: lens aperture can represent by F value F2.2 is even larger, F value is larger, represents that lens aperture is less).
Three, imaging target surface of the present utility model is large, and effective imaging surface reaches φ 9.3mm, can coordinate existing 1/1.8 completely " large target surface sensor is without dark angle; And the imaging circle of existing large, medium visual field camera lens is generally all 6.3mm, only can meet 1/3 " or 1/2.8 " inductor.
Four, imaging target surface of the present utility model is large, and effective imaging surface reaches φ 9.3mm, can coordinate existing 1/1.8 completely " large target surface sensor is without dark angle; And the imaging circle of existing large, medium visual field camera lens is generally all 6.3mm, only can meet 1/3 " or 1/2.8 " sensor.The utility model has large target surface cooperation large aperture in addition, can at blur-free imaging under ultra-low illumination 0.005LX.
Five, optical lens volume of the present utility model is little, and camera lens finished product maximum caliber controls at φ less than 18, and cut to lengthen is at below 40mm; And existing similar complete product camera lens is general all at more than φ 24*50.
Six, optical lens of the present utility model is made up of 8 sheet glass lens, and glass material is comparatively cheap; And the existing similar general lens of complete product camera lens are at 10 or more, cost is more expensive.
Seven, camera lens of the present utility model can reach the effect day and night shared, even if also can become the picture of high-resolution at night under infrared spectrum; Existing large, medium visual field camera lens generally can only use when visible ray, or imaging and fuzzy under infrared spectrum.
Eight, color of the present utility model is clearly demarcated, color reducibility and image planes Well-recovered.
Nine, the utility model also solve before will under visible ray and infrared light blur-free imaging and cause the problem that lens cost is relatively high and tolerance tight, yield is lower all separately.
Accompanying drawing explanation
By reading the detailed description done non-limiting example with reference to the following drawings, other features, objects and advantages of the present utility model will become more obvious:
Fig. 1 is the structural representation of the utility model optical system.
Fig. 2 is the resolution MTF schematic diagram of the utility model optical system.
Embodiment
Below in conjunction with specific embodiment, the utility model is described in detail.Following examples will contribute to those skilled in the art and understand the utility model further, but not limit the utility model in any form.It should be pointed out that to those skilled in the art, without departing from the concept of the premise utility, some distortion and improvement can also be made.These all belong to protection domain of the present utility model.
The utility model optical system may be used for the sensor devices such as CMOS sensitive film or CCD chip, as shown in Figure 1, described optical system comprises the first lens 1, second lens 2, the 3rd lens 3, the 4th lens 4, the 5th lens 5, the 6th lens 6, the 7th lens 7, the 8th lens 8 and the image planes 9 that coaxially arrange successively from object plane to image planes, between the 3rd lens and the 4th lens, be provided with diaphragm 10, the 8th is provided with optical filter 11 between lens and image planes.Distance between each lens of optical system is all greater than 0.1mm, and total focal length is greater than 2mm.
4th lens 4 as above and the 5th lens 5 form balsaming lens, and the 7th lens 7 and the 8th lens 8 form balsaming lens.
The lensed material of the first lens 1, second lens 2 as above, the 3rd lens 3, the 4th lens 4, the 5th lens 5, the 6th lens 6, the 7th lens 7, the 8th lens 8 is optical glass, and lens face type is spherical.
The focal length of the first lens 1 as above, the focal length of the second lens 2, the focal length of the 4th lens 4, the focal length of the 7th lens 7 are all negative; The focal length of the 3rd lens 3, the focal length of the 5th lens 5, the focal length of the 6th lens 6, the focal length of the 8th lens 8 are just all, and total focal length is just.
The two sides S1/S2 of the first lens 1 as above bends towards diaphragm, has the ability changing big or middle field of view edge light refraction angle.
The two sides S3/S4 of the second lens 2 as above bends towards diaphragm the, and S4 curvature is comparatively large, effectively can also reduce spherical aberration while changing deflection of light angle further.
The two sides S5/S6 of the 3rd lens 3 as above is lenticular lens, and its effect makes light can be full of whole diaphragm face S7.
Second lens 2 as above and the 3rd lens 3 adopt positive and negative contrary lens, the aberration of the effective system reduced.
System as above first three sheet at diaphragm 10, the version of rear five sheet glass lens, first three sheet mainly changes light path, incided in diaphragm as far as possible parallel for the incident light of wide-angle, latter five have employed two groups of cemented doublet, and adopt symmetrical structure, make overall light tendency level and smooth, ensure that entire system tolerance is loose.
4th lens 4 as above and the 5th lens 5 are combined into balsaming lens, wherein the two sides S8/S9 of the 4th lens 4 is double concave type lens, the two sides S9/S10 of the 5th lens 5 is lenticular lens, cemented surface S9 diaphragm dorsad, second S10 of the 5th lens 5 bends towards diaphragm, such combination effectively reduces spherical aberration, has the ability ensureing aberration equilibrium.
The two sides S11/S12 of the 6th lens 6 as above is lenticular lens, and its effect makes light can be level and smooth excessive on the eyeglass of two below, plays the effect of balance aberration.
7th lens 7 as above and the 8th lens 8 are combined into balsaming lens, wherein the two sides S13/S14 of the 7th lens 7 is curved month type type lens, the two sides S14/S15 of the 8th lens 8 is lenticular lens, cemented surface S13 diaphragm dorsad, second S15 of the 8th lens 8 bends towards diaphragm, such combination effectively reduces the emergence angle of system, has the effect of loose tolerance.
Ultrahigh resolution realizes mainly through following methods: the aberration one, having corrected field of view edge when designing, while center resolution is high, takes into full account edge resolution; Design theory pixel of the present utility model can reach 1,000 ten thousand pixels, can meet 1/1.8 completely ", the requirement of 4K*2K; Two, on glass is selected, fully use crown glass and the ingenious collocation of flint glass, make the same point converging to image planes that the light of same visual field can be concentrated; 3, design theoretical value suitable higher than actual needs value, this ensures that thering image is clearly.Fig. 2 is the MTF schematic diagram of systemic resolution.
Large aperture realizes mainly through following methods: once, when aperture designs according to the F1.4 even theoretical value of F1.3 go design, this ensure that actual product of working it out can not differ too many; Two, make the chief ray incidence angles of the maximum field of view of image planes (i.e. C.R.A) be less than 10 ° in design, so also make marginal ray lose little.The chief ray incidence angles of the maximum field of view of the utility model case image planes and C.R.A) be 8 °, marginal ray loss is little, so the actual effect of large aperture can be better.
Large target surface realizes mainly through following methods: 1, just take into full account the sensor that will mate when lens design, although this camera lens is mainly in order to coordinate 1/1.8 " sensor of (φ 9.0mm); consider and stay some surpluses; in order to avoid can because dark angle appear in the reasons such as tolerance in manufacturing, the utility model be according to 1/1.7 " (φ 9.3mm) design; 2, make the last one side of system bend towards diaphragm in design, light collection can be made like this to arrive the optical exit angle of image planes smaller, ensure that the tolerance of whole system.
Small size realizes mainly through following methods: in total system, 1, only employ 8 common glass spheric glasses, and the material that most of selective refraction rate is higher, the effective like this bore reducing system; 2, the conscious distance reduced between eyeglass in design, controls the length of whole system, makes volume of the present utility model at below φ 18*40mm.
Low cost realizes mainly through following methods: one, when selection material, the material that prioritizing selection is common, and those more difficult processing or the difficult material bought all are removed; Two, the design employs two panels cemented doublet, which reduces two spacer rings, also saves artificial cost, also effectively decreases the many eyeglasses of system simultaneously and assembles the tolerance brought, and has effectively saved cost like this when ensureing overall performance; Three, going of having a mind in the design process considers the problem in production and assembly, airspace can be controlled without spaced ring between these two each and every one lens of described second lens 2, the 3rd lens 3, as long as it is just passable directly to use lens edge to locate, so just at least save the cost of a spaced ring.
Day and night share and realize mainly through following methods: 1, first two waveband being set, i.e. visible light wave range 430nm ~ 656nm and infrared band 830nm ~ 870nm when designing, ensureing so also can normally work when there is infrared light at night; 2, visible waveband is set in the design and keeps the same rear Jiao with infrared band, so both can realize visible and infrared in same image planes imaging; 3, ensure the MTF theoretical value more than 50% of MTF theoretical value at visible ray of infrared design, this ensures that thering evening images is clearly, can not differ too many.
For realizing best image planes effect, the rear portion of this optical system has also added optical filter 11, to filter out veiling glare, make image color beautiful and sharp keen while there is good color reducibility.
Because the utility model adopts the combination cleverly between eyeglass, its resolution can reach more than 1,000 ten thousand pixels; Because the utility model Theoretical Design f-number just designs according to F1.4, and C.R.A is less than 10 °, so realize large aperture; Because the utility model Theoretical Design imaging target surface is just greater than 1/1.8 ", actual can compatible 1/1.7 ", the utility model optical system transfer function curve, more than 0.2 is reached at 2501p/mm place, namely pixel reaches 8,000,000, as shown in Figure 2, so realize the effect of large target surface, ultra high-definition imaging; So realize the effect of large target surface imaging; The utility model is because the advantage of compatible ultra high-definition, large aperture and large target surface in addition, so also can blur-free imaging under ultra-low illumination 0.005lx, meets starlight level imaging requirements popular at present completely; The number of lenses used due to the utility model is less, and the material major part used is all the material of common high index of refraction, so effectively reduce volume, also reduces cost simultaneously; Due to the utility model considers in the design respectively when visible ray and infrared light can imaging separately, solve the rare of this kind of camera lens of day and night on market.In addition, because this optical system employs two cemented doublet, effective so tolerance is loose, can realize producing in enormous quantities, thus reduce costs.The utility model optical system cost is low, and volume is little, pixel is high, aperture is large, target surface is large, all can high definition imaging at visible waveband and the infrared band of specifying, and is mainly used in monitoring, the aspects such as photograph, onboard system.
Above specific embodiment of the utility model is described.It is to be appreciated that the utility model is not limited to above-mentioned particular implementation, those skilled in the art can make various distortion or amendment within the scope of the claims, and this does not affect flesh and blood of the present utility model.
Claims (10)
1. an optical system, it is characterized in that, comprise the first lens, the second lens, the 3rd lens, the 4th lens, the 5th lens, the 6th lens, the 7th lens, the 8th lens and the image planes that coaxially arrange successively from object plane to image planes, between the 3rd lens and the 4th lens, be provided with diaphragm, the 8th is provided with optical filter between lens and image planes.
2. optical system according to claim 1, is characterized in that, described first lens are meniscus lens, and its two sides all bends towards diaphragm, and its focal length is negative.
3. optical system according to claim 1, is characterized in that, described second lens are meniscus lens, and its two sides all bends towards diaphragm, and its focal length is negative.
4. optical system according to claim 1, is characterized in that, described 3rd lens are lenticular lens, and its focal length is just.
5. optical system according to claim 1, is characterized in that, described 4th lens are double concave type lens, and its focal length is negative.
6. optical system according to claim 1, is characterized in that, described 5th lens are lenticular lens, and its focal length is just.
7. optical system according to claim 1, is characterized in that, described 6th lens are lenticular lens, and its focal length is negative.
8. optical system according to claim 1, is characterized in that, described 7th lens are meniscus lens, its two sides diaphragm all dorsad, and its focal length is negative.
9. optical system according to claim 1, is characterized in that, described 8th lens are lenticular lens, and its focal length is just.
10. optical system according to claim 1, it is characterized in that, the lensed material of described first lens, the second lens, the 3rd lens, the 4th lens, the 5th lens, the 6th lens, the 7th lens, the 8th lens is optical glass, and lens face type is spherical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420736645.7U CN204256245U (en) | 2014-11-27 | 2014-11-27 | Optical system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420736645.7U CN204256245U (en) | 2014-11-27 | 2014-11-27 | Optical system |
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| CN204256245U true CN204256245U (en) | 2015-04-08 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI664465B (en) * | 2017-07-27 | 2019-07-01 | 先進光電科技股份有限公司 | Optical image capturing system |
| CN110275272A (en) * | 2018-03-16 | 2019-09-24 | 杭州海康威视数字技术股份有限公司 | A kind of camera lens |
| TWI683150B (en) * | 2017-07-27 | 2020-01-21 | 先進光電科技股份有限公司 | Optical image capturing system |
| CN112505879A (en) * | 2020-11-18 | 2021-03-16 | 西安玄瑞光电科技有限公司 | Wide-field-of-view long-focus high-resolution lens |
-
2014
- 2014-11-27 CN CN201420736645.7U patent/CN204256245U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI664465B (en) * | 2017-07-27 | 2019-07-01 | 先進光電科技股份有限公司 | Optical image capturing system |
| TWI683150B (en) * | 2017-07-27 | 2020-01-21 | 先進光電科技股份有限公司 | Optical image capturing system |
| CN110275272A (en) * | 2018-03-16 | 2019-09-24 | 杭州海康威视数字技术股份有限公司 | A kind of camera lens |
| CN110275272B (en) * | 2018-03-16 | 2021-06-25 | 杭州海康微影传感科技有限公司 | Lens |
| CN112505879A (en) * | 2020-11-18 | 2021-03-16 | 西安玄瑞光电科技有限公司 | Wide-field-of-view long-focus high-resolution lens |
| CN112505879B (en) * | 2020-11-18 | 2023-11-24 | 西安玄瑞光电科技有限公司 | Wide-view-field long-focus high-resolution lens |
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