CN109471242A - A kind of 3.9mm focal length Streaming Media intelligent back vision camera lens and its imaging method - Google Patents

A kind of 3.9mm focal length Streaming Media intelligent back vision camera lens and its imaging method Download PDF

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Publication number
CN109471242A
CN109471242A CN201811585849.4A CN201811585849A CN109471242A CN 109471242 A CN109471242 A CN 109471242A CN 201811585849 A CN201811585849 A CN 201811585849A CN 109471242 A CN109471242 A CN 109471242A
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China
Prior art keywords
lens
bent moon
gluing unit
focal length
streaming media
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CN201811585849.4A
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Chinese (zh)
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CN109471242B (en
Inventor
王文敏
冯科
苏传凯
刘俊来
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Fujian Forecam Tiantong Optics Co Ltd
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Fujian Forecam Tiantong Optics Co Ltd
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Publication of CN109471242A publication Critical patent/CN109471242A/en
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    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00Optical objectives specially designed for the purposes specified below
    • G02B13/001Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
    • G02B13/0055Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element
    • G02B13/006Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element at least one element being a compound optical element, e.g. cemented elements
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00Optical objectives specially designed for the purposes specified below
    • G02B13/001Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
    • G02B13/0055Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/006Filter holders
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/025Mountings, adjusting means, or light-tight connections, for optical elements for lenses using glue

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)

Abstract

The present invention relates to a kind of 3.9mm focal length Streaming Media intelligent back vision camera lenses, it is characterized by: rear group of B being positive in the optical system of the camera lens along light incident direction is successively arranged that focal power is negative from left to right preceding group of A, diaphragm C and focal power, organizing A before described includes bent moon negative lens A;Group B includes the biconvex lens B-1 set gradually and the close gluing unit of biconcave lens B-2, bent moon positive lens B-3, biconvex lens B-4 and the close gluing unit of bent moon negative lens B-5 after described, have many advantages, such as larger field angle, high-resolution, optical texture simplify, material price it is relatively inexpensive, can be adapted to the CCD of 2,000,000 pixel high-resolutions or CMOS.

Description

A kind of 3.9mm focal length Streaming Media intelligent back vision camera lens and its imaging method
Technical field
The present invention relates to a kind of 3.9mm focal length Streaming Media intelligent back vision camera lens and its imaging methods.
Background technique
Early stage has various wide-angle tight shots to be applied in onboard system in the market, still, due to many products At edge, aberration and high-order spherical aberration are difficult to correct, and belong to the vehicle-mounted product of low side.Currently, rarely having real meaning in vehicle-mounted industry The wide-angle tight shot of the high image quality of low cost in justice.
Summary of the invention
In place of against the above deficiency, a kind of simple 3.9mm focal length Streaming Media intelligence of structure is provided It can backsight camera lens and its imaging method.
The technical scheme is that a kind of 3.9mm focal length Streaming Media intelligent back vision camera lens, the optical system of the camera lens Middle rear group of B being positive along light incident direction is successively arranged that focal power is negative from left to right preceding group of A, diaphragm C and focal power, institute Stating preceding group of A includes bent moon negative lens A;Group B includes the biconvex lens B-1 set gradually and the close glue of biconcave lens B-2 after described It is combined, bent moon positive lens B-3, biconvex lens B-4 and the close gluing unit of bent moon negative lens B-5.
Further, the airspace between the preceding group A and rear group B is 2.16mm.
Further, the sky between the bent moon negative lens A and biconvex lens B-1 and the close gluing unit of biconcave lens B-2 2.16mm is divided between gas;Sky between the biconvex lens B-1 and the close gluing unit of biconcave lens B-2 and bent moon positive lens B-3 0.3mm is divided between gas;Sky between the bent moon positive lens B-3 and biconvex lens B-4 and the close gluing unit of bent moon negative lens B-5 0.1mm is divided between gas.
Further, the rear of the biconvex lens B-4 and the close gluing unit of bent moon negative lens B-5 is provided with optical filter.
A kind of imaging method of 3.9mm focal length Streaming Media intelligent back vision camera lens, sequentially includes the following steps: light from left to right Successively through bent moon negative lens A, biconvex lens B-1 and the close gluing unit of biconcave lens B-2, bent moon positive lens B-3, biconvex lens B- It is imaged after the close gluing unit of 4 and bent moon negative lens B-5.
Compared with prior art, the invention has the following advantages: having larger field angle, high-resolution, optics knot The advantages that structure is simplified, material price is relatively inexpensive can be adapted to the CCD of 2,000,000 pixel high-resolutions or CMOS.
Detailed description of the invention
The invention patent is further illustrated with reference to the accompanying drawing.
Fig. 1 is the optical system diagram of the embodiment of the present invention.
Fig. 2 is the mechanical construction drawing of the embodiment of the present invention.
Fig. 3 is to focus so that the MTF under visible light central vision image quality optimal cases schemes.
In figure:
A bent moon negative lens A, B-1 biconvex lens B-1, B-2 biconcave lens B-2, B-3 bent moon positive lens B-3, B-4 biconvex lens B- 4, B-5 bent moon negative lens B-5,1-AB spacer ring.
Specific embodiment
The present invention is further described with reference to the accompanying drawings and detailed description.
As shown in Figures 1 to 3, a kind of 3.9mm focal length Streaming Media intelligent back vision camera lens, along light in the optical system of the camera lens The rear group of B that line incident direction is successively arranged that focal power is negative from left to right preceding group of A, diaphragm C and focal power are positive, described preceding group A includes bent moon negative lens A;After described group B include the biconvex lens B-1 set gradually and the close gluing unit of biconcave lens B-2, it is curved Moon positive lens B-3, biconvex lens B-4 and the close gluing unit of bent moon negative lens B-5.
In the present embodiment, the airspace between the preceding group A and rear group B is 2.16mm.
In the present embodiment, between the bent moon negative lens A and biconvex lens B-1 and the close gluing unit of biconcave lens B-2 Airspace be 2.16mm;Between the biconvex lens B-1 and the close gluing unit of biconcave lens B-2 and bent moon positive lens B-3 Airspace be 0.3mm;Between the bent moon positive lens B-3 and biconvex lens B-4 and the close gluing unit of bent moon negative lens B-5 Airspace be 0.1mm.
In the present embodiment, the rear of the biconvex lens B-4 and the close gluing unit of bent moon negative lens B-5 is provided with optical filtering Piece.
A kind of imaging method of 3.9mm focal length Streaming Media intelligent back vision camera lens, sequentially includes the following steps: light from left to right Successively through bent moon negative lens A, biconvex lens B-1 and the close gluing unit of biconcave lens B-2, bent moon positive lens B-3, biconvex lens B- It is imaged after the close gluing unit of 4 and bent moon negative lens B-5.
In the present embodiment, following optical index has been reached by the optical system that above-mentioned lens set is constituted:
Focal length: f '=3.9mm;
Relative aperture F=1.9;
Field angle: 2w >=100 ° (image space is as 2 η ' of visual field >=Ф 6.6mm);
TV distortion: < -7.5%;
Resolution ratio: it can be adapted to 2,000,000 pixel high-resolution CCD or cmos camera;
Total length of light path ∑≤17.2mm, optics rear cut-off distance L ' >=4.68mm;
It is applicable in spectral line range: 420nm~700nm.
From the technical indicator of completion it is found that total length of light path is shorter, then camera lens is small in size;Jiao Shizhong afterwards, can be with trigger The video camera of interface is used cooperatively;Clear aperture is big, and light-inletting quantity is sufficient, can be in the more dim lower use of environment;Preceding group of negative power, After organize positive light coke, guaranteeing still can normal use in high and low temperature environment;High refraction, the flint glass of high dispersion and height is selected to reflect The crown glass of the low dispersion of rate comes achromatism and astigmatism;Eyeglass used in the present invention is global face, and R value is moderate, mitigates mirror Piece assembly difficulty reduces processing and material cost using low price glass, while reducing the optical sensitive degree of camera lens.
In the present embodiment, the parameter of each eyeglass is as shown in following table one:
In the present embodiment, AB spacer ring is provided between bent moon negative lens A and biconvex lens B-1, which is The airspace and its optical axis for guaranteeing bent moon negative lens A and biconvex lens B-1 are assembled, while invalid light is intercepted and being inhaled It receives, lens stray light problem can effectively solve the problem that using the design of delustring line inside AB spacer ring.
In the present embodiment, as can be seen from Figure 3, it is seen that when light is imaged, 120 line of central vision is greater than 0.5,0.7 visual field to place 120 lines are greater than 0.45 to place.
The camera lens has the automotive field market advantage, and preceding group of negative power corrects 3 rank aberrations and 5 rank spherical aberrations, organize glue afterwards Close piece by the flint glass of the high dispersion of high refractive index and the crown glass of high-refractivity and low-dispersion form mainly correct color difference and as It dissipating, reasonable distribution focal power reduces each face incidence angle, high-definition camera level is reached with lower susceptibility, in optical design, Lens element material is reasonably selected, make camera lens the aberration of the wave-length coverage of 420~700nm obtain reasonably correct and Balance.
Above-listed preferred embodiment, has been further described the object, technical solutions and advantages of the present invention, is answered Understand, the foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.

Claims (5)

1. a kind of 3.9mm focal length Streaming Media intelligent back vision camera lens, it is characterised in that: in the optical system of the camera lens along light from From left to right incident direction is successively arranged the rear group of B that preceding group of A, diaphragm C and the focal power that focal power is negative are positive, and organizes A packet before described Include bent moon negative lens A;Group B includes the biconvex lens B-1 set gradually and the close gluing unit of biconcave lens B-2, bent moon after described Positive lens B-3, biconvex lens B-4 and the close gluing unit of bent moon negative lens B-5.
2. 3.9mm focal length Streaming Media intelligent back vision camera lens according to claim 1, it is characterised in that: group A is with after before described Airspace between group B is 2.16mm.
3. 3.9mm focal length Streaming Media intelligent back vision camera lens according to claim 1, it is characterised in that: the bent moon is negative saturating Airspace between mirror A and biconvex lens B-1 and the close gluing unit of biconcave lens B-2 is 2.16mm;The biconvex lens B-1 Airspace between the close gluing unit of biconcave lens B-2 and bent moon positive lens B-3 is 0.3mm;The bent moon positive lens B-3 Airspace between biconvex lens B-4 and the close gluing unit of bent moon negative lens B-5 is 0.1mm.
4. 3.9mm focal length Streaming Media intelligent back vision camera lens according to claim 1, it is characterised in that: the biconvex lens The rear of B-4 and the close gluing unit of bent moon negative lens B-5 is provided with optical filter.
5. a kind of imaging method of 3.9mm focal length Streaming Media intelligent back vision camera lens, which is characterized in that using such as claim 1-4 Any 3.9mm focal length Streaming Media intelligent back vision camera lens, and light is sequentially included the following steps: from left to right successively through curved Moon negative lens A, biconvex lens B-1 and the close gluing unit of biconcave lens B-2, bent moon positive lens B-3, biconvex lens B-4 and bent moon It is imaged after the close gluing unit of negative lens B-5.
CN201811585849.4A 2018-12-25 2018-12-25 3.9mm focal length streaming media intelligent rearview mirror and imaging method thereof Active CN109471242B (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014013296A (en) * 2012-07-04 2014-01-23 Nikon Corp Optical system, imaging device including the same, and method for manufacturing the same
CN203422519U (en) * 2013-08-15 2014-02-05 福建福光数码科技有限公司 Ultra-wide-angle 2.8 primary lens
CN105445906A (en) * 2015-12-24 2016-03-30 福建福光股份有限公司 4mm-focal length wide-angle high-light transmission day-and-night confocal lens
CN107991762A (en) * 2017-12-12 2018-05-04 福建福光股份有限公司 A kind of 1.3mm focal lengths panorama day and night confocal high definition camera lens
CN108873278A (en) * 2018-09-06 2018-11-23 福建福光股份有限公司 High definition continuous magnification lens and its focus adjustment method with active temperature focusing function
CN209343020U (en) * 2018-12-25 2019-09-03 福建福光天瞳光学有限公司 A kind of 3.9mm focal length Streaming Media intelligent back vision camera lens

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014013296A (en) * 2012-07-04 2014-01-23 Nikon Corp Optical system, imaging device including the same, and method for manufacturing the same
CN203422519U (en) * 2013-08-15 2014-02-05 福建福光数码科技有限公司 Ultra-wide-angle 2.8 primary lens
CN105445906A (en) * 2015-12-24 2016-03-30 福建福光股份有限公司 4mm-focal length wide-angle high-light transmission day-and-night confocal lens
CN107991762A (en) * 2017-12-12 2018-05-04 福建福光股份有限公司 A kind of 1.3mm focal lengths panorama day and night confocal high definition camera lens
CN108873278A (en) * 2018-09-06 2018-11-23 福建福光股份有限公司 High definition continuous magnification lens and its focus adjustment method with active temperature focusing function
CN209343020U (en) * 2018-12-25 2019-09-03 福建福光天瞳光学有限公司 A kind of 3.9mm focal length Streaming Media intelligent back vision camera lens

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