CN108594406A - A kind of high definition of 2.8mm day and night confocal camera lens - Google Patents
A kind of high definition of 2.8mm day and night confocal camera lens Download PDFInfo
- Publication number
- CN108594406A CN108594406A CN201810590638.3A CN201810590638A CN108594406A CN 108594406 A CN108594406 A CN 108594406A CN 201810590638 A CN201810590638 A CN 201810590638A CN 108594406 A CN108594406 A CN 108594406A
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- Prior art keywords
- lens
- eyeglass
- plastic aspheric
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- 229920003023 plastic Polymers 0.000 claims abstract description 43
- 239000004033 plastic Substances 0.000 claims abstract description 43
- 230000003287 optical effect Effects 0.000 claims abstract description 13
- 239000000463 material Substances 0.000 claims abstract description 8
- 230000005499 meniscus Effects 0.000 claims abstract description 8
- 125000006850 spacer group Chemical group 0.000 claims description 14
- 239000005357 flat glass Substances 0.000 claims description 3
- 230000008901 benefit Effects 0.000 abstract description 3
- 238000003384 imaging method Methods 0.000 description 6
- 230000000007 visual effect Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000011521 glass Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 239000000571 coke Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000004438 eyesight Effects 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 239000005331 crown glasses (windows) Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000005308 flint glass Substances 0.000 description 1
- 238000003331 infrared imaging Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004297 night vision Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/04—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics
- G02B1/041—Lenses
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/14—Optical objectives specially designed for the purposes specified below for use with infrared or ultraviolet radiation
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/026—Mountings, adjusting means, or light-tight connections, for optical elements for lenses using retaining rings or springs
Abstract
The present invention relates to a kind of high definition of 2.8mm day and night confocal camera lenses, including body tube and the optical system being arranged in body tube, it be negative preceding group of eyeglass A, diaphragm and focal power is positive rear group of eyeglass B that the optical system, which includes along the focal power that light incident direction is set gradually from left to right, it is described before group eyeglass A include negative meniscus A 1, plastic aspheric lens A 2 and falcate positive lens A 3；Group eyeglass B includes plastic aspheric lens B 1, plastic aspheric lens B 2 and biconvex lens B 3 after described.The present invention uses two groups of optical elements, 3 after 3 before diaphragm, and one negative one of focal power is just, the camera lens have many advantages, such as larger field angle, day and night, optical texture simplify, material price it is relatively inexpensive, resolution ratio can reach 8MP, can be adapted to corresponding CCD or CMOS.
Description
Technical field：
The present invention relates to a kind of high definition of 2.8mm day and night confocal camera lenses.
Background technology：
There are many 2.8mm tight shots to be applied in safety-protection system currently on the market, the huge market demand.Traditional 2.8mm mirrors
Head is usually full glass lens, and since field angle is very big, therefore cost is higher.People want clarity with the development of technology
Ask higher and higher, high-resolution chip layer goes out not entirely, and in present security protection industry, rarely has low cost truly high
The big wide-angle tight shot of image quality；Meanwhile by traditional thinking, in order to improve resolution ratio, generally there are two types of methods：When using compared with
Few eyeglass reduces clear aperature, second is that using more eyeglasses.The performance of camera lens can be no doubt promoted using more eyeglasses, but
The thing followed is the increase of cost；Although cost reduction can be made using clear aperature is reduced, lens imaging can be caused
Quality declines.
Invention content：
The present invention has made improvements in view of the above-mentioned problems of the prior art, i.e., technical problem to be solved by the invention is to provide
A kind of high definition of 2.8mm day and night confocal camera lens, is not only simple in structure, is at low cost, and imaging effect is good.
To achieve the goals above, the technical solution adopted by the present invention is：A kind of high definition of 2.8mm day and night confocal camera lens,
Including body tube and the optical system being arranged in body tube, the optical system include along light incident direction from left to right according to
The focal power of secondary setting is that negative preceding group of eyeglass A, diaphragm and focal power are that positive rear group of eyeglass B, the preceding group eyeglass A include
Negative meniscus A-1, plastic aspheric lens A-2 and falcate positive lens A-3；Group eyeglass B includes that plastics are non-after described
Spherical lens B-1, plastic aspheric lens B-2 and biconvex lens B-3.
Further, the airspace between the preceding group eyeglass A and rear group eyeglass B is 2.8mm.
Further, the air in the preceding group eyeglass A between negative meniscus A-1 and plastic aspheric lens A-2
Between be divided into 2.2mm；Airspace between plastic aspheric lens A-2 and falcate positive lens A-3 is 1mm.
Further, the sky in the rear group eyeglass B between plastic aspheric lens B-1 and plastic aspheric lens B-2
0.05mm is divided between gas；Airspace between plastic aspheric lens B-2 and biconvex lens B-3 is 0.53mm.
Further, the rear of the rear group eyeglass B is provided with sheet glass.
Further, it is provided with the first spacer ring between the falcate positive lens A-3 and plastic aspheric lens B-1；Institute
It states and is provided with the second spacer ring between plastic aspheric lens B-2 and biconvex lens B-3.
Further, the body tube is plastic material.
Compared with prior art, the present invention has the following effects that：
（1）Structure of the invention is simplified, rationally, is had good visual light imaging performance and is realized day and night confocal；
（2）Total length of light path is shorter, camera lens it is small；It is burnt big afterwards, it can be used cooperatively with the video camera of multiple interfaces；
（3）Eyeglass used is glass modeling mixing, reduces processing and material cost；
（4）Body tube uses plastic material so that camera lens is lighter and handier.
Description of the drawings：
Fig. 1 is the optical texture schematic diagram of the embodiment of the present invention；
Fig. 2 is the mechanical structure schematic diagram of the embodiment of the present invention；
Fig. 3 is the MTF functional values in the embodiment of the present invention under visible light；
Fig. 4 is the MTF functional values under night vision in the embodiment of the present invention.
In figure：
1- negative meniscus A-1；2- plastic aspheric lens A-2；3- falcate positive lens A-3；4- plastic aspheric lens
B-1；5- plastic aspheric lens B-2；6- biconvex lens B-3；7- glass cover-plates；8- body tubes；The first spacer rings of 9-；10- second
Spacer ring；11- diaphragms.
Specific implementation mode:
The present invention will be further described in detail with reference to the accompanying drawings and detailed description.
As shown in Figs. 1-2, a kind of high definition of 2.8mm of the present invention day and night confocal camera lens, including body tube and be arranged in primary mirror
Optical system in cylinder, the optical system include before the focal power that light incident direction is set gradually from left to right is negative
Group eyeglass A, diaphragm and focal power are positive rear group of eyeglass B, it is described before group eyeglass A include that negative meniscus A-1, plastics are non-
Spherical lens A-2 and falcate positive lens A-3；Group eyeglass B includes plastic aspheric lens B-1, plastic aspherical element after described
Lens B-2 and biconvex lens B-3.
In the present embodiment, the airspace organized before described between eyeglass A and rear group eyeglass B is 2.8mm.Using preceding group of eyeglass
A is negative power, and the rear eyeglass B that organizes is positive light coke, with the purpose compensated before and after realization.Entire camera lens ensure camera lens refractive index and
Focal power approximate ratio is distributed, and ensures that the harmony of the incidence angle size of front and back group eyeglass is improved to reduce the sensibility of camera lens
Manufacturing feasibility.
In the present embodiment, the sky in eyeglass A between negative meniscus A-1 and plastic aspheric lens A-2 is organized before described
2.2mm is divided between gas；Airspace between plastic aspheric lens A-2 and falcate positive lens A-3 is 1mm.
In the present embodiment, organized after described in eyeglass B between plastic aspheric lens B-1 and plastic aspheric lens B-2
Airspace is 0.05mm；Airspace between plastic aspheric lens B-2 and biconvex lens B-3 is 0.53mm.
In the present embodiment, the rear that eyeglass B is organized after described is provided with sheet glass.
In the present embodiment, it is provided with the first spacer ring between the falcate positive lens A-3 and plastic aspheric lens B-1,
First spacer ring to ensure falcate positive lens A-3 and plastic aspheric lens B-1 airspace and optical axis assembly, first every
Circle is internal to can effectively solve the problem that lens stray light problem using the design of interior hook formula, by the hole size management and control to stop position,
It can ensure the clear aperature of camera lens.It is provided with the second spacer ring between the plastic aspheric lens B-2 and biconvex lens B-3,
Second spacer ring assembles to the airspace and its optical axis for ensureing plastic aspheric lens B-2 and biconvex lens B-3, while to nothing
Effect light is intercepted and is absorbed, and can effectively solve the problem that lens stray light problem using step design inside the second spacer ring.
In the present embodiment, the body tube is special plastic material, and by the direct injection molding of mold, has size essence
The advantages that degree is high, batch consistency and stability are good, shaping efficiency is high, light-weight.The internal diameter of each ladder needs inside body tube
It is outer in strict accordance with the processing of drawing tolerance, an important factor for concentricity between each ladder is also to ensure that image quality, i.e. spacer ring with
The plane of lens contacts will have accurate verticality with concentricity to ensure the accuracy of eyeglass assembly, keep it tight with eyeglass cooperation
It is close, ensure the consistency of lens light axis.Body tube technique using high temperature melting and whole group eyeglass is fixed together with spacer ring, ensures
Image quality has certain waterproof and against shock effect.The lens barrel also uses the interface mode of M12X0.5-4h, to match visitor
The requirement of family video camera.
Integral mechanical structure of the present invention is light and handy, meets the small principle of overall volume, and in order to coordinate precision, all spacer rings equal
It is processed using accurate digital control process equipment, body tube uses mold injection molding, ensures the essence that each mechanical parts, eyeglass coordinate
True property and stability.
In the present embodiment, the parameter such as following table of each eyeglass：
In the present embodiment, the achievable technical indicator of the optical system is as follows：
Focal length：f′=2.8mm；
Relative aperture F=2.0；
Field angle：2w >=142 ° (image space is as 2 η ' of visual field >=Ф 7.2mm)；
Distortion：＜ -58%；
Resolution ratio：It can be adapted to 8,000,000 pixel high-resolution CCD or cmos camera；
Total length of light path ∑≤23mm, optics rear cut-off distance L ' >=5mm；
It is applicable in spectral line range：480nm~850nm.
In the present embodiment, from attached drawing 3~4 it is found that when visual light imaging, 120 line of central vision to place close to 0.8, edge
For 120 line of visual field to place close to 0.45, MTF curve decline is more slow, and there is good contrast and resolution ratio, difference to regard for imaging
Field MTF difference is little；Be when infrared imaging use 0.85 mum wavelength, in the case that visual light imaging clearly, central vision 120
Line is more than 0.45 to place MTF, realizes image quality that is day and night confocal, and can having high definition.
The advantage of the invention is that：
（1）From technical indicator it is found that total length of light path is shorter, camera lens it is small；It is burnt big afterwards, it can be matched with the video camera of multiple interfaces
It closes and uses；
（2）The camera lens external structure uses plastic material body tube so that camera lens is lighter and handier；
（3）Preceding group of eyeglass negative power, rear to organize eyeglass positive light coke, ensureing still can normal use in high and low temperature environment；
（4）High refraction, the flint glass of low dispersion is selected to carry out achromatism and the picture that disappears with the crown glass of the high dispersion of high refractive index
It dissipates；
（5）Eyeglass used in the present invention is glass modeling mixing, reduces processing and material cost.
The foregoing is merely presently preferred embodiments of the present invention, all equivalent changes done according to scope of the present invention patent with
Modification should all belong to the covering scope of the present invention.
Claims (7)
1. a kind of high definition of 2.8mm day and night confocal camera lens, it is characterised in that：Including body tube and the optics being arranged in body tube
System, it is preceding group of eyeglass A, the light born that the optical system, which includes along the focal power that light incident direction is set gradually from left to right,
Door screen and focal power are rear group of positive eyeglass B, and it includes negative meniscus A-1, plastic aspheric lens A- to organize eyeglass A before described
2 and falcate positive lens A-3；It is described after group eyeglass B include plastic aspheric lens B-1, plastic aspheric lens B-2 and
Biconvex lens B-3.
2. a kind of high definition of 2.8mm according to claim 1 day and night confocal camera lens, it is characterised in that：Group eyeglass A before described
Airspace between rear group of eyeglass B is 2.8mm.
3. a kind of high definition of 2.8mm according to claim 1 day and night confocal camera lens, it is characterised in that：Group eyeglass A before described
Airspace between middle negative meniscus A-1 and plastic aspheric lens A-2 is 2.2mm；Plastic aspheric lens A-2 with
Airspace between falcate positive lens A-3 is 1mm.
4. a kind of high definition of 2.8mm according to claim 1 day and night confocal camera lens, it is characterised in that：Group eyeglass B after described
Airspace between middle plastic aspheric lens B-1 and plastic aspheric lens B-2 is 0.05mm；Plastic aspheric lens B-
Airspace between 2 and biconvex lens B-3 is 0.53mm.
5. a kind of high definition of 2.8mm according to claim 1 day and night confocal camera lens, it is characterised in that：Group eyeglass B after described
Rear be provided with sheet glass.
6. a kind of high definition of 2.8mm according to claim 1 day and night confocal camera lens, it is characterised in that：The falcate is just
The first spacer ring is provided between lens A-3 and plastic aspheric lens B-1；The plastic aspheric lens B-2 and biconvex lens
The second spacer ring is provided between B-3.
7. a kind of high definition of 2.8mm according to claim 1 day and night confocal camera lens, it is characterised in that：The body tube is
Plastic material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810590638.3A CN108594406A (en) | 2018-06-09 | 2018-06-09 | A kind of high definition of 2.8mm day and night confocal camera lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810590638.3A CN108594406A (en) | 2018-06-09 | 2018-06-09 | A kind of high definition of 2.8mm day and night confocal camera lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108594406A true CN108594406A (en) | 2018-09-28 |
Family
ID=63623346
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810590638.3A Pending CN108594406A (en) | 2018-06-09 | 2018-06-09 | A kind of high definition of 2.8mm day and night confocal camera lens |
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| Country | Link |
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| CN (1) | CN108594406A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111726488A (en) * | 2020-05-29 | 2020-09-29 | 深圳市伯森光电科技有限公司 | Optical system |
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| CN202886721U (en) * | 2012-07-24 | 2013-04-17 | 大立光电股份有限公司 | Wide-angle optical lens assembly |
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| JP2017526943A (en) * | 2015-08-06 | 2017-09-14 | ゼァージァン サニー オプティクス カンパニー リミテッドＺｈｅｊｉａｎｇ Ｓｕｎｎｙ Ｏｐｔｉｃｓ Ｃｏ．，Ｌｔｄ． | Super wide angle lens |
| CN107561670A (en) * | 2017-09-01 | 2018-01-09 | 福建福光股份有限公司 | A kind of big thang-kngs of 2.8mm day and night confocal camera lens |
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2018
- 2018-06-09 CN CN201810590638.3A patent/CN108594406A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102369471A (en) * | 2009-04-03 | 2012-03-07 | 株式会社理光 | Wide angle lens and imaging device |
| CN203773132U (en) * | 2011-09-29 | 2014-08-13 | 富士胶片株式会社 | Imaging lens and imaging device |
| CN202886721U (en) * | 2012-07-24 | 2013-04-17 | 大立光电股份有限公司 | Wide-angle optical lens assembly |
| JP2017526943A (en) * | 2015-08-06 | 2017-09-14 | ゼァージァン サニー オプティクス カンパニー リミテッドＺｈｅｊｉａｎｇ Ｓｕｎｎｙ Ｏｐｔｉｃｓ Ｃｏ．，Ｌｔｄ． | Super wide angle lens |
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| CN108020909A (en) * | 2017-12-12 | 2018-05-11 | 福建福光股份有限公司 | A kind of 2.8mm focal lengths high definition ultra-wide angle on-vehicle lens |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111726488A (en) * | 2020-05-29 | 2020-09-29 | 深圳市伯森光电科技有限公司 | Optical system |
| WO2021237840A1 (en) * | 2020-05-29 | 2021-12-02 | 深圳市伯森光电科技有限公司 | Optical system |
| CN111726488B (en) * | 2020-05-29 | 2022-07-08 | 深圳市伯森光电科技有限公司 | Optical system |
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Application publication date: 20180928 |
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