CN105259638B - A kind of big light passing high-definition fixed-focus aspheric lens - Google Patents
A kind of big light passing high-definition fixed-focus aspheric lens Download PDFInfo
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- CN105259638B CN105259638B CN201510739970.8A CN201510739970A CN105259638B CN 105259638 B CN105259638 B CN 105259638B CN 201510739970 A CN201510739970 A CN 201510739970A CN 105259638 B CN105259638 B CN 105259638B
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- lens
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
- G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
- G02B13/0045—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having five or more lenses
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0055—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element
- G02B13/006—Miniaturised 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
-
- 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
Abstract
The invention discloses a kind of big light passing high-definition fixed-focus aspheric lens, including eyeglass, diaphragm and optical filter, diaphragm is located at camera lens optical path middle section, and diaphragm light hole is set on camera lens axis, and number of lenses six separately constitutes entrance pupil group and emergent pupil group；Entrance pupil group is located at diaphragm entrance pupil side, and overall focal power is negative, and lens (A1), non-spherical lens (A2), lens (A3) are sequentially arranged on entrance pupil group optical path direction, and lens (A3) are close to diaphragm setting；Emergent pupil group is located at diaphragm emergent pupil side, its overall focal power is positive, non-spherical lens (B1), convex lens (B2) and concavees lens (B3) are sequentially set on emergent pupil group optical path direction, wherein convex lens (B2) and concavees lens (B3) are fixed as one with its opposite convex surface and concave surface gluing, and optical filter is located in the light exit direction of emergent pupil group.The present invention can be controlled eyeglass aberration in tolerance interval while increasing camera lens light passing amount by using aspherical lens in camera lens.
Description
Technical field
The present invention relates to optical imaging apparatus, especially a kind of big light passing high-definition fixed-focus aspheric lens.
Background technique
Web camera is the commonly used equipment in security system, and camera lens is the main composition part of web camera, mirror
Head performance directly affects image quality and visual field, and in lens design, increasing light passing amount is the effective of raising image quality
Method, but increasing light passing amount means the increase of lens light-receiving area, it is possible to increase eyeglass aberration, when the aberration correction of camera lens
When scarce capacity, it is easy to cause image deterioration because eyeglass aberration increases, therefore, how while increasing light passing amount,
Eyeglass aberration in camera lens is controlled in tolerance interval, is a research direction.
Summary of the invention
The present invention proposes a kind of big light passing high-definition fixed-focus aspheric lens, by using aspherical lens, energy in camera lens
Eyeglass aberration is controlled in tolerance interval while increasing camera lens light passing amount.
The present invention uses following scheme.
A kind of big light passing high-definition fixed-focus aspheric lens, the camera lens include eyeglass, diaphragm and optical filter, the diaphragm position
In camera lens optical path middle section, diaphragm light hole is set on camera lens axis, and the number of lenses is six, separately constitutes entrance pupil group and emergent pupil
Group；The entrance pupil group is located at diaphragm entrance pupil side, and overall focal power is negative, be sequentially arranged on entrance pupil group optical path direction lens A1,
Non-spherical lens A2, lens A3, lens A3 are close to diaphragm setting；The emergent pupil group is located at diaphragm emergent pupil side, overall focal power
It is positive, non-spherical lens B1, convex lens B2 and concavees lens B3 is sequentially set on emergent pupil group optical path direction, wherein convex lens B2 and recessed
Lens B3 is fixed as one with its opposite convex surface and concave surface gluing, forms cemented doublet structure, and the optical filter is located at
In the light exit direction of pupil group.
The lens A1 is meniscus, and the non-spherical lens A2 is negative crescent non-spherical lens, the lens A3
The crescent that is negative lens, the non-spherical lens B1 are biconvex non-spherical lens.
The convex lens B2 is formed with crown glass, and concavees lens B3 is formed with flint glass.
It is glued with extraordinary natural gum between the convex lens B2 and concavees lens B3.
Each lens light incident surface and exit facet, specification on optical path direction are respectively as follows:
Lens A1 light incident surface radius of curvature 35mm, thickness 0.7mm, half bore 4.1mm.
Lens A1 light-emitting face radius of curvature 3mm, thickness 2.5mm, half bore 2.6mm.
Non-spherical lens A2 light incident surface radius of curvature -5mm, thickness 2.2mm, half bore 2.8mm.
Non-spherical lens A2 light-emitting face radius of curvature -7mm, thickness 0.9mm, half bore 2.8mm.
Lens A3 light incident surface radius of curvature -14mm, thickness 1.7mm, half bore 3.1mm.
Lens A3 light-emitting face radius of curvature -6mm, thickness 0.1mm, half bore 3.4mm.
Non-spherical lens B1 light incident surface radius of curvature 18mm, thickness 2.5mm, half bore 3.9mm.
Non-spherical lens B1 light-emitting face radius of curvature -6mm, thickness 0.1mm, half bore 4mm.
Convex lens B2 light incident surface radius of curvature 36mm, thickness 2.3mm, half bore 3.75mm.
Convex lens B2 and concavees lens B3 gluing fixed curvature radius -7mm, thickness 0.7mm, half bore 3.75mm.
Concavees lens B3 light-emitting face radius of curvature -30mm, thickness 5.8mm, half bore 4mm.
Aperture stop size is thickness 2.3mm, half bore 3mm in optical path.
The entrance pupil group, diaphragm and emergent pupil group are formed by optical path relative aperture F=1.4.
When incident light optic spectrum line is in 480nm~850nm, the entrance pupil group, diaphragm and emergent pupil group are formed by optical path
Focal length f '=3.8mm.
The entrance pupil group, diaphragm and emergent pupil group are formed by optical path field angle 2w >=140 °, and image space is as 2 η ' of visual field >=Ф
6.6mm。
The entrance pupil group, diaphragm and emergent pupil group are formed by total length of light path ∑≤22mm, optics rear cut-off distance L ' >=6mm.
In the present invention, number of lenses six separately constitutes entrance pupil group and emergent pupil group；The entrance pupil group is located at diaphragm entrance pupil
Side, overall focal power are negative, and lens A1, non-spherical lens A2, lens A3 are sequentially arranged on entrance pupil group optical path direction, the present invention
Aspheric lens has been used in the entrance pupil group of camera lens optical path, has been located at the rear lens A1 for receiving ambient, due to aspheric
Face camera lens is stronger to the correction ability of eyeglass aberration, therefore can preferably correct ambient and enter through big light passing lenses
The spherical aberration generated when optical path.
In entrance pupil group of the present invention, lens A3 is close to diaphragm setting, and since lens A3 is thin convex lens, which can be
The light corrected through non-spherical lens A2 is efficiently passed to diaphragm, and will not generate ratio chromatism,.
In the present invention, emergent pupil group is located at diaphragm emergent pupil side, and overall focal power is positive, sequentially sets on emergent pupil group optical path direction
Non-spherical lens B1, convex lens B2 and concavees lens B3 are set, the present invention has used non-spherical lens in the emergent pupil group of camera lens optical path,
It is located at diaphragm emergent pupil, due to due to correction ability of the aspheric lens to eyeglass aberration it is stronger, can rectify well
Just enter the light coma of emergent pupil group, and corrects the advanced amount in aberration.
In the present invention, entrance pupil group non-spherical lens mainly corrects spherical aberration, and emergent pupil group non-spherical lens mainly corrects coma
And advanced amount aberration, this can not only match with the optical path feature in entrance pupil group, emergent pupil group, and due to that can be directed to different pictures
Difference selects aspherical mirror, therefore can reduce eyeglass production difficulty, reduces eyeglass cost.
In the emergent pupil group of product of the present invention, convex lens B2 and concavees lens B3 are fixed as with its opposite male and fomale(M&F) gluing
One, convex lens B2 are formed with crown glass, and concavees lens B3 is formed with flint glass.The structure is contacted with each other thin by two pieces
Mirror forms achromatism structure, and the convex lens in structure and concavees lens are respectively by the different crown glass and flint glass of Abbe number
Molding, and first face in second face of convex lens and concavees lens is enabled to have identical radius of curvature and glued together, by fitting
Two lens strengths of locality distribution, can eliminate the chromatism of position of camera lens, promote target lens.
In the present invention, entrance pupil group totality focal power is negative, and emergent pupil group totality focal power is positive, and to spherical aberration, coma, color
The correction of difference, the advanced amount of aberration has exclusive lens combination and diaphragm to realize, this improves camera lens to different temperatures environment
Adaptability, at different temperatures, the thermal expansion and cold contraction effect of each eyeglass is approximate, but since optical path is corrected by exclusive eyeglass
Combination and diaphragm are realized, so that each eyeglass after expanding with heat and contract with cold can still be mutually matched the correcting function of optical transmission process, no
Correction of the camera lens to spherical aberration, coma, color difference, CRA can be influenced because of the variation of temperature, camera lens remains under high temperature or low temperature environment
It works normally.
Optical path of the invention uses multiple eyeglasses, the focal power reasonable distribution of each eyeglass in optical path, and has dedicated for disappearing
Except the cemented doublet structure of color difference, this makes camera lens obtain reasonably correcting peace in the aberration of the wave-length coverage of 480~850nm
Weighing apparatus.So that camera lens can not only pass through infrared benefit under night extremely low illumination environment by blur-free imaging under light environment in the daytime
Light, also can blur-free imaging.
In the present invention, the cemented doublet structure for correcting dispersion is set in emergent pupil group, can optical path on the whole
Guarantee the harmony of the incidence angle size of front and back group eyeglass, to reduce camera lens sensibility, reduces camera lens cost, it is easy to produce.
Ensure in different operating light wave band simultaneously, the focal power of entrance pupil group and emergent pupil group is still kept reversely, to improve camera lens application
The popularity of occasion.
By the size characteristic of each lens in scheme of the present invention it is found that the lens wearer R value that uses of the present invention is moderate,
While mitigating eyeglass assembly difficulty, processing cost is also reduced, and helps to reduce the optical sensitive degree of camera lens.
In the present invention, optical filter is located in the light exit direction of emergent pupil group, that is, is located at optical line terminal, since this camera lens is big
Light passing amount camera lens, clear field is larger, optical line terminal be arranged optical filter, help to filter it is variegated, eliminate polarisation reflection it is miscellaneous
Light, to further promote image quality.
In the present invention, entrance pupil group, diaphragm and emergent pupil group are formed by optical path relative aperture F=1.4, possess biggish light passing
Amount, so that camera lens light-inletting quantity is sufficient, it can be in the more dim lower use of environment.
In the present invention, the entrance pupil group, diaphragm and emergent pupil group are formed by total length of light path ∑≤22mm, optics rear cut-off distance L '
≥6mm.Total length of light path is shorter, facilitates the miniaturization of lens design.
Detailed description of the invention
The following further describes the present invention with reference to the drawings；
Attached drawing 1 is the structural schematic diagram of camera lens of the present invention；
Attached drawing 2 is the MTF figure of camera lens of the present invention under visible light；
Attached drawing 3 is MTF figure of the camera lens of the present invention in night infrared light filling；
In figure: 1- lens A1；2- non-spherical lens A2；3- lens A3,21- non-spherical lens B1,22- convex lens B2,23-
Concavees lens B3,31- diaphragm, 32- optical filter.
Specific embodiment
As shown in Figure 1, a kind of big light passing high-definition fixed-focus aspheric lens, the camera lens includes eyeglass, diaphragm 31 and filters
Piece 32, the diaphragm 31 are located at camera lens optical path middle section, and 31 light hole of diaphragm is set on camera lens axis, and the number of lenses is six,
Separately constitute entrance pupil group and emergent pupil group；The entrance pupil group is located at 31 entrance pupil side of diaphragm, and overall focal power is negative, entrance pupil group optical path
Lens (A1) 1, non-spherical lens (A2) 2, lens (A3) 3 is arranged in square upstream sequence, and lens (A3) 3 are close to diaphragm 31 and are arranged；Institute
It states emergent pupil group and is located at 31 emergent pupil side of diaphragm, overall focal power is positive, and non-spherical lens is sequentially arranged on emergent pupil group optical path direction
(B1) 21, convex lens (B2) 22 and concavees lens (B3) 23, wherein convex lens (B2) 22 and concavees lens (B3) 23 are opposite convex with its
Face and concave surface gluing are fixed as one, and form cemented doublet structure, and the optical filter 32 is located at the light exit direction of emergent pupil group
On.
The lens (A1) 1 are meniscus, and the non-spherical lens (A2) 2 is negative crescent non-spherical lens, described
Lens (A3) 3 are negative crescent lens, and the non-spherical lens (B1) 21 is biconvex non-spherical lens.
The convex lens (B2) 22 is formed with crown glass, and concavees lens (B3) 23 are formed with flint glass.
It is glued with extraordinary natural gum between the convex lens (B2) 22 and concavees lens (B3) 23.
Each lens light incident surface and exit facet, specification on optical path direction are respectively as follows:
1 light incident surface radius of curvature 35mm of lens (A1), thickness 0.7mm, half bore 4.1mm.
1 light-emitting face radius of curvature 3mm of lens (A1), thickness 2.5mm, half bore 2.6mm.
2 light incident surface radius of curvature -5mm of non-spherical lens (A2), thickness 2.2mm, half bore 2.8mm.
2 light-emitting face radius of curvature -7mm of non-spherical lens (A2), thickness 0.9mm, half bore 2.8mm.
3 light incident surface radius of curvature -14mm of lens (A3), thickness 1.7mm, half bore 3.1mm.
3 light-emitting face radius of curvature -6mm of lens (A3), thickness 0.1mm, half bore 3.4mm.
21 light incident surface radius of curvature 18mm of non-spherical lens (B1), thickness 2.5mm, half bore 3.9mm.
21 light-emitting face radius of curvature -6mm of non-spherical lens (B1), thickness 0.1mm, half bore 4mm.
22 light incident surface radius of curvature 36mm of convex lens (B2), thickness 2.3mm, half bore 3.75mm.
Convex lens (B2) 22 and 23 gluing of concavees lens (B3) fix curvature radius -7mm, thickness 0.7mm, half bore
3.75mm。
23 light-emitting face radius of curvature -30mm of concavees lens (B3), thickness 5.8mm, half bore 4mm.
Diaphragm 31 is having a size of thickness 2.3mm, half bore 3mm in optical path.
The entrance pupil group, diaphragm and emergent pupil group are formed by optical path relative aperture F=1.4.
When incident light optic spectrum line is in 480nm~850nm, the entrance pupil group, diaphragm and emergent pupil group are formed by optical path
Focal length f '=3.8mm.
The entrance pupil group, diaphragm and emergent pupil group are formed by optical path field angle 2w >=140 °, and image space is as 2 η ' of visual field >=Ф
6.6mm。
The entrance pupil group, diaphragm and emergent pupil group are formed by total length of light path ∑≤22mm, optics rear cut-off distance L ' >=6mm.
After assembling, the achievable technical indicator of the camera lens is as follows:
Focal length f '=3.8mm；Relative aperture F=1.4；Field angle 2w >=120 ° (image space is as 2 η ' of visual field >=Ф 6.6mm)；It is abnormal
Become < -12%；Resolution ratio can be adapted to 3,000,000 pixel high-resolution CCD or cmos camera；Total length of light path ∑≤22mm, optics
Rear cut-off distance L ' >=6mm；It is applicable in spectral line range: 480nm~850nm.
When daylight abundance, this camera lens is worked normally, and MTF is as shown in Fig. 2, when night, with infrared light filling,
MTF is as shown in figure 3, from Fig. 2 and Fig. 3 it is found that the distance in visible light and infrared light rear lens focus face differs very little, it is seen that light
When imaging, 120 line of central vision is greater than 0.6 to place, and 120 line of peripheral field is greater than 0.4 to place；Infrared 0.85mm wavelength imaging
When, 120 line of central vision is greater than 0.6 to place, and 120 line of peripheral field is greater than 0.33 to place, really realizes day and night confocal.Same
Two kinds of wave band imaging requirements can be met in image planes simultaneously, that is, can satisfy the camera lens requirement of day and night video camera.
Claims (8)
1. a kind of big light passing high-definition fixed-focus aspheric lens, it is characterised in that: the camera lens includes eyeglass, diaphragm and optical filter,
The diaphragm is located at camera lens optical path middle section, and diaphragm light hole is set on camera lens axis, and the number of lenses is six, separately constitute into
Pupil group and emergent pupil group；The entrance pupil group is located at diaphragm entrance pupil side, and overall focal power is negative, sequentially sets on entrance pupil group optical path direction
Lens A1, non-spherical lens A2, lens A3 are set, lens A3 is close to diaphragm setting；The emergent pupil group is located at diaphragm emergent pupil side, total
Body focal power is positive, and non-spherical lens B1, convex lens B2 and concavees lens B3 is sequentially arranged on emergent pupil group optical path direction, wherein convex lens
Mirror B2 and concavees lens B3 is fixed as one with its opposite convex surface and concave surface gluing, forms cemented doublet structure, the optical filtering
Piece is located in the light exit direction of emergent pupil group；
The lens A1 is the lenses for receiving the big light passing amount of ambient, and the non-spherical lens A2 is located at lens
The rear A1 is for correcting the spherical aberration generated when ambient enters optical path through big light passing lenses；
The non-spherical lens B1 is located at diaphragm for correcting into the height in the light coma and correction aberration of emergent pupil group
Grade amount；
Each lens light incident surface and exit facet, specification on optical path direction are respectively；
Lens A1 light incident surface radius of curvature 35mm, thickness 0.7mm, half bore 4.1mm；
Lens A1 light-emitting face radius of curvature 3mm, thickness 2.5mm, half bore 2.6mm；
Non-spherical lens A2 light incident surface radius of curvature -5mm, thickness 2.2mm, half bore 2.8mm；
Non-spherical lens A2 light-emitting face radius of curvature -7mm, thickness 0.9mm, half bore 2.8mm；
Lens A3 light incident surface radius of curvature -14mm, thickness 1.7mm, half bore 3.1mm；
Lens A3 light-emitting face radius of curvature -6mm, thickness 0.1mm, half bore 3.4mm；
Non-spherical lens B1 light incident surface radius of curvature 18mm, thickness 2.5mm, half bore 3.9mm；
Non-spherical lens B1 light-emitting face radius of curvature -6mm, thickness 0.1mm, half bore 4mm；
Convex lens B2 light incident surface radius of curvature 36mm, thickness 2.3mm, half bore 3.75mm；
Convex lens B2 and concavees lens B3 gluing fixed curvature radius -7mm, thickness 0.7mm, half bore 3.75mm；
Concavees lens B3 light-emitting face radius of curvature -30mm, thickness 5.8mm, half bore 4mm；
Aperture stop size is thickness 2.3mm, half bore 3mm in optical path.
2. a kind of big light passing high-definition fixed-focus aspheric lens according to claim 1, it is characterised in that: the lens A1 is
Meniscus, the non-spherical lens A2 are negative crescent non-spherical lens, and the lens A3 is negative crescent lens, described non-
Spherical lens B1 is biconvex non-spherical lens.
3. a kind of big light passing high-definition fixed-focus aspheric lens according to claim 1, it is characterised in that: the convex lens B2
It is formed with crown glass, concavees lens B3 is formed with flint glass.
4. a kind of big light passing high-definition fixed-focus aspheric lens according to claim 1, it is characterised in that: the convex lens B2
It is glued with extraordinary natural gum between concavees lens B3.
5. a kind of big light passing high-definition fixed-focus aspheric lens according to claim 1, it is characterised in that: the entrance pupil group,
Diaphragm and emergent pupil group are formed by optical path relative aperture F=1.4.
6. a kind of big light passing high-definition fixed-focus aspheric lens according to claim 5, it is characterised in that: when incident light spectrum
For spectral line in 480nm~850nm, the entrance pupil group, diaphragm and emergent pupil group are formed by optical path focal length f '=3.8mm.
7. a kind of big light passing high-definition fixed-focus aspheric lens according to claim 6, it is characterised in that: the entrance pupil group,
Diaphragm and emergent pupil group are formed by optical path field angle 2w >=140 °, and image space is as 2 η ' of visual field >=Ф 6.6mm.
8. a kind of big light passing high-definition fixed-focus aspheric lens according to claim 7, it is characterised in that: the entrance pupil group,
Diaphragm and emergent pupil group are formed by total length of light path ∑≤22mm, optics rear cut-off distance L ' >=6mm.
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| CN201510739970.8A CN105259638B (en) | 2015-11-04 | 2015-11-04 | A kind of big light passing high-definition fixed-focus aspheric lens |
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| CN201510739970.8A CN105259638B (en) | 2015-11-04 | 2015-11-04 | A kind of big light passing high-definition fixed-focus aspheric lens |
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| CN105259638B true CN105259638B (en) | 2019-03-15 |
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| KR102580826B1 (en) | 2016-01-26 | 2023-09-20 | 삼성전기주식회사 | Optical Imaging System |
| TWI600923B (en) * | 2016-10-19 | 2017-10-01 | 大立光電股份有限公司 | Photographing optical lens system, image capturing device and electronic device |
| CN108873243B (en) * | 2017-05-08 | 2021-01-08 | 宁波舜宇车载光学技术有限公司 | Optical lens |
| CN110673302B (en) * | 2019-09-04 | 2021-07-30 | 福建福光股份有限公司 | Super wide-angle lens |
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| JP2004317866A (en) * | 2003-04-17 | 2004-11-11 | Canon Inc | Objective lens and imaging device using the same |
| CN101149465A (en) * | 2006-09-21 | 2008-03-26 | 富士能株式会社 | Wide-angle imaging lens, imaging device and camera module |
| JP2012098724A (en) * | 2010-10-29 | 2012-05-24 | Kofukin Seimitsu Kogyo (Shenzhen) Yugenkoshi | Super wide angle lens |
| CN103293644A (en) * | 2013-02-06 | 2013-09-11 | 玉晶光电(厦门)有限公司 | Portable electronic device and optical imaging lens thereof |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004317866A (en) * | 2003-04-17 | 2004-11-11 | Canon Inc | Objective lens and imaging device using the same |
| CN101149465A (en) * | 2006-09-21 | 2008-03-26 | 富士能株式会社 | Wide-angle imaging lens, imaging device and camera module |
| JP2012098724A (en) * | 2010-10-29 | 2012-05-24 | Kofukin Seimitsu Kogyo (Shenzhen) Yugenkoshi | Super wide angle lens |
| CN103293644A (en) * | 2013-02-06 | 2013-09-11 | 玉晶光电(厦门)有限公司 | Portable electronic device and optical imaging lens thereof |
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