CN105259644A - Day and night ultra-wide angle lens with fixed focus of 2.3mm - Google Patents
Day and night ultra-wide angle lens with fixed focus of 2.3mm Download PDFInfo
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- CN105259644A CN105259644A CN201510739987.3A CN201510739987A CN105259644A CN 105259644 A CN105259644 A CN 105259644A CN 201510739987 A CN201510739987 A CN 201510739987A CN 105259644 A CN105259644 A CN 105259644A
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- lens
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- convex lens
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- pupil group
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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
- G02B13/06—Panoramic objectives; So-called "sky lenses" including panoramic objectives having reflecting surfaces
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- 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
-
- 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
- G02B13/004—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 four lenses
-
- 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
- G02B7/025—Mountings, adjusting means, or light-tight connections, for optical elements for lenses using glue
Abstract
The invention discloses a day and night ultra-wide angle lens with a fixed focus of 2.3mm. The lens comprises four lenses, a diaphragm and an optical filter. The diaphragm is arranged in the middle section of a lens optical path and on the middle axis of the lens body. The lenses form a pupil entrance group and a pupil exit group. The pupil entrance group is arranged on a diaphragm pupil entrance side. A concave lens (A1) and a convex lens (A2) are sequentially arranged in the optical path direction of the pupil entrance group. The pupil exit group is arranged on a diaphragm pupil exit side. A concave lens (B1) and a convex lens (B2) are sequentially arranged in the optical path direction of the pupil exit group. The convex lens (B2) is fixed on the concave lens (B1). The optical filter is arranged in the light exit direction of the pupil exit group. According to the invention, the lens is characterized in that with a few lenses, ultra-wide angle, high definition and day and night confocal ability are achieved.
Description
Technical field
The present invention relates to optical imaging apparatus, especially a kind of 2.3mm focuses day and night bugeye lens.
Background technology
Web camera is the common equipment in safety-protection system, and camera lens is the main composition part of web camera, lens performance directly affects image quality and visual field, along with the technical indicator demand of safety-protection system improves constantly, need camera lens can realize ultra-wide angle, high resolving power, the day and night technical characteristic such as confocal with less eyeglass number at present.
Summary of the invention
The present invention proposes a kind of 2.3mm and focuses day and night bugeye lens, can realize ultra-wide angle, high resolving power, day and night confocal technical characteristic with less eyeglass number.
The present invention by the following technical solutions.
A kind of 2.3mm focuses day and night bugeye lens, and described camera lens comprises eyeglass, diaphragm and optical filter, and described diaphragm is positioned at camera lens light path stage casing, and diaphragm light hole is located on camera lens axis, and described number of lenses is four, forms entrance pupil group and emergent pupil group respectively; Described entrance pupil group is positioned at diaphragm entrance pupil side, on entrance pupil group optical path direction, order arranges concavees lens (A1) and convex lens (A2), described emergent pupil group is positioned at diaphragm emergent pupil side, on emergent pupil group optical path direction, order arranges convex lens (B1) and concavees lens (B2), and described concavees lens (B2) are fixed on convex lens (B1); Described optical filter is positioned in the light exit direction of emergent pupil group.
Described emergent pupil group, with extraordinary natural gum gummed between convex lens (B1) and concavees lens (B2).
In described emergent pupil group, convex lens (B1) are shaping with crown glass, concavees lens (B2) are shaping with flint glass, the lens center thickness of described convex lens (B1) is 1.84mm, the lens center thickness of described concavees lens (B2) is 0.72mm, the radius-of-curvature of convex lens (B1) two curved surface is respectively 10.37mm and 3.06mm, and the radius-of-curvature of concavees lens (B2) two curved surface is respectively 3.06mm and 9.18mm; Described concavees lens (B2) and convex lens (B1) in radius-of-curvature be 3.06mm curved surface on gummed fixing.
In described entrance pupil group, concavees lens (A1) are plano-concave lens, and its surface curvature is 3.05mm; Convex lens (A2) two curvature of curved surface is 10.13mm, described concavees lens (A1) lens center thickness is 0.76mm, described convex lens (A2) lens center thickness is 3.58mm, airspace between concavees lens (A1) and convex lens (A2) is 0.85mm, and the airspace between entrance pupil group convex lens (A2) and diaphragm is 0.85mm.
Two eyeglasses in described entrance pupil group are shaping with same material, two eyeglasses in entrance pupil group with crown glass or flint glass shaping.
Airspace between emergent pupil group convex lens (B1) and diaphragm is zero.
In the present invention, described camera lens comprises eyeglass, diaphragm and optical filter, and described diaphragm is positioned at camera lens light path stage casing, and diaphragm light hole is located on camera lens axis, and described number of lenses is four, forms entrance pupil group and emergent pupil group respectively; On entrance pupil group optical path direction, order arranges concavees lens (A1) and convex lens (A2), airspace is there is between concavees lens (A1) and convex lens (A2), this design expands the camera lens visual field, make camera lens looking away angling, because concavees lens have the effect of broadening one's vision, therefore when concavees lens be positioned at camera lens the most front time, concavees lens are camera lens and provide larger wide-angle view, can reach field angle: 2w >=140 ° (image space is as visual field 2 η ' >=Ф 4.4mm).
In structure of the present invention, scattering is being there is in extraneous light through concavees lens, but the scattered beam only penetrated on convex lens (A2) could converge directive diaphragm, this just makes extraneous light when by first concave lens, only penetrate camera lens central authorities light finally can enter light path, because the optical property of lens center is better than rims of the lens, therefore this structure can reduce optical transmission process spherical aberration, to realizing the high resolving power of lens group and day and night confocally having positive meaning.
In the present invention, described emergent pupil group, with extraordinary natural gum gummed between convex lens (B1) and concavees lens (B2), in emergent pupil group, convex lens (B1) are shaping with crown glass, concavees lens (B2) are shaping with flint glass, the lens center thickness of described convex lens (B1) is 1.84mm, the lens center thickness of described concavees lens (B2) is 0.72mm, the radius-of-curvature of convex lens (B1) two curved surface is respectively 10.37mm and 3.06mm, and the radius-of-curvature of concavees lens (B2) two curved surface is respectively 3.06mm and 9.18mm; Described concavees lens (B2) and convex lens (B1) in radius-of-curvature be 3.06mm curved surface on gummed fixing.This structure defines achromatism structure by the thin lens that two pieces contact with each other, convex lens in structure and concavees lens respectively by the different crown glass of Abbe number and flint glass shaping, and make first face in convex lens second face and concavees lens have identical radius-of-curvature and glued together, by suitably distributing two lens strengths, the chromatism of position of camera lens can be eliminated, promote target lens.
In the present invention, two eyeglasses in described entrance pupil group are shaping with same material, two eyeglasses in entrance pupil group with crown glass or flint glass shaping, concavees lens (A1) are plano-concave lens, and its surface curvature is 3.05mm, convex lens (A2) two curvature of curved surface is 10.13mm, described concavees lens (A1) lens center thickness is 0.76mm, described convex lens (A2) lens center thickness is 3.58mm, airspace between concavees lens (A1) and convex lens (A2) is 0.85mm, airspace between entrance pupil group convex lens (A2) and diaphragm is 0.85mm, this part-structure is owing to being two lens structure, therefore same material is adopted to contribute to eliminating the ratio chromatism, of camera lens, simultaneously in this part-structure, by rationally arranging the spacing of concavees lens (A1) and convex lens (A2), and the distance arranged between lens and diaphragm, eliminate the ratio chromatism, that this class formation causes as much as possible, contribute to promoting target lens.
In the present invention, the airspace between emergent pupil group convex lens (B1) and diaphragm is zero, because emergent pupil group is actually a cemented doublet, when the airspace when between itself and diaphragm is zero, not easily produces ratio chromatism, contributes to promoting target lens.
The present invention is by above-mentioned technological means, the technical indicator that can reach at spectral line scope: 480nm ~ 850nm is focal distance f '=2.3mm, relative aperture F=2.2, field angle: 2w >=140 ° (image space is as visual field 2 η ' >=Ф 4.4mm), distortion <-25%, resolution can be adaptive with 5,000,000 pixel high-resolution CCD or cmos camera, light path overall length ∑≤19mm, optics rear cut-off distance L ' >=5mm.
As mentioned above, present invention employs multiple technological means, eliminate the spherical aberration of camera lens, doubly put aberration and ratio chromatism, and reasonable distribution camera lens focal power, make camera lens reasonably be corrected at the aberration of the wavelength coverage of 480 ~ 850nm and balance, this wavelength coverage includes visible ray and infrared light, therefore high-quality pixel screen can be reached by day, when insufficient light or night, by infrared light filling, also can blur-free imaging, ensure the high-quality of image.
In the present invention, the eyeglass number of camera lens is few, while alleviating eyeglass assembly difficulty, also reduces processing cost.
In the present invention, optical filter is positioned in the light exit direction of emergent pupil group, is namely positioned at optical line terminal, because this camera lens is wide-angle lens, field angle is comparatively large, arranges optical filter at optical line terminal, contribute to filtration variegated, eliminate polarisation (veiling glare of reflection), thus promote image quality further.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention is further described;
Accompanying drawing 1 is the structural representation of camera lens of the present invention;
Accompanying drawing 2 is camera lens of the present invention MTF figure under visible light;
Accompanying drawing 3 is camera lens of the present invention MTF figure when night infrared light filling;
In figure: the concavees lens (A1) of 1-entrance pupil group, the convex lens (A2) of 2-entrance pupil group, the convex lens (B1) of 3-emergent pupil group, the concavees lens (B2) of 4-emergent pupil group, 5-diaphragm, 6-diaphragm light hole, 7-optical filter.
Embodiment
As shown in Figure 1, a kind of 2.3mm focuses day and night bugeye lens, and described camera lens comprises eyeglass, diaphragm 5 and optical filter 7, described diaphragm 5 is positioned at camera lens light path stage casing, diaphragm light hole 6 is located on camera lens axis, and described number of lenses is four, forms entrance pupil group and emergent pupil group respectively; Described entrance pupil group is positioned at diaphragm 5 entrance pupil side, on entrance pupil group optical path direction, order arranges concavees lens (A1) 1 and convex lens (A2) 2, described emergent pupil group is positioned at diaphragm 5 emergent pupil side, on emergent pupil group optical path direction, order arranges convex lens (B1) 3 and concavees lens (B2) 4, and described concavees lens (B2) 4 are fixed on convex lens (B1) 3; Described optical filter 7 is positioned in the light exit direction of emergent pupil group.
Described emergent pupil group, with extraordinary natural gum gummed between convex lens (B1) 3 and concavees lens (B2) 4.
In described emergent pupil group, (B1) 3 is shaping with crown glass for convex lens, (B2) 4 is shaping with flint glass for concavees lens, the lens center thickness of described convex lens (B1) 3 is 1.84mm, the lens center thickness of described concavees lens (B2) 4 is 0.72mm, the radius-of-curvature of convex lens (B1) 3 liang of curved surfaces is respectively 10.37mm and 3.06mm, and the radius-of-curvature of concavees lens (B2) 4 liang of curved surfaces is respectively 3.06mm and 9.18mm; Described concavees lens (B2) 4 and convex lens (B1) 3 glue together fixing on the curved surface that radius-of-curvature is 3.06mm.
In described entrance pupil group, concavees lens (A1) 1 are plano-concave lens, and its surface curvature is 3.05mm; Convex lens (A2) 2 liang of curvature of curved surface are 10.13mm, described concavees lens (A1) 1 lens center thickness is 0.76mm, described convex lens (A2) 2 lens center thickness is 3.58mm, airspace between concavees lens (A1) 1 and convex lens (A2) 2 is 0.85mm, and the airspace between entrance pupil group convex lens (A2) 2 and diaphragm 5 is 0.85mm.
Two eyeglasses 1 and 2 in described entrance pupil group are shaping with same material, two eyeglasses 1 and 2 in entrance pupil group with crown glass or flint glass shaping.
Airspace between emergent pupil group convex lens (B1) 3 and diaphragm 5 is zero.
When daylight is sufficient, this camera lens normally works, its MTF as shown in Figure 2, when night, with infrared light filling, its MTF as shown in Figure 3, from Fig. 2 and Fig. 3, the distance difference in visible ray and infrared light rear lens focus face is very little, same image planes can meet two kinds of wave band imaging requirements simultaneously, namely can meet the camera lens requirement of day and night video camera.
Claims (6)
1. a 2.3mm focuses day and night bugeye lens, it is characterized in that: described camera lens comprises eyeglass, diaphragm and optical filter, described diaphragm is positioned at camera lens light path stage casing, and diaphragm light hole is located on camera lens axis, described number of lenses is four, forms entrance pupil group and emergent pupil group respectively; Described entrance pupil group is positioned at diaphragm entrance pupil side, on entrance pupil group optical path direction, order arranges concavees lens (A1) and convex lens (A2), described emergent pupil group is positioned at diaphragm emergent pupil side, on emergent pupil group optical path direction, order arranges convex lens (B1) and concavees lens (B2), and described concavees lens (B2) are fixed on convex lens (B1); Described optical filter is positioned in the light exit direction of emergent pupil group.
2. a kind of 2.3mm according to claim 1 focuses day and night bugeye lens, it is characterized in that: described emergent pupil group, with extraordinary natural gum gummed between convex lens (B1) and concavees lens (B2).
3. a kind of 2.3mm according to claim 1 focuses day and night bugeye lens, it is characterized in that: in described emergent pupil group, convex lens (B1) are shaping with crown glass, concavees lens (B2) are shaping with flint glass, the lens center thickness of described convex lens (B1) is 1.84mm, the lens center thickness of described concavees lens (B2) is 0.72mm, the radius-of-curvature of convex lens (B1) two curved surface is respectively 10.37mm and 3.06mm, and the radius-of-curvature of concavees lens (B2) two curved surface is respectively 3.06mm and 9.18mm; Described concavees lens (B2) and convex lens (B1) in radius-of-curvature be 3.06mm curved surface on gummed fixing.
4. a kind of 2.3mm according to claim 1 focuses day and night bugeye lens, it is characterized in that: in described entrance pupil group, and concavees lens (A1) are plano-concave lens, and its surface curvature is 3.05mm; Convex lens (A2) two curvature of curved surface is 10.13mm, described concavees lens (A1) lens center thickness is 0.76mm, described convex lens (A2) lens center thickness is 3.58mm, airspace between concavees lens (A1) and convex lens (A2) is 0.85mm, and the airspace between entrance pupil group convex lens (A2) and diaphragm is 0.85mm.
5. a kind of 2.3mm according to claim 4 focuses day and night bugeye lens, it is characterized in that: two eyeglasses in described entrance pupil group are shaping with same material, two eyeglasses in entrance pupil group with crown glass or flint glass shaping.
6. a kind of 2.3mm according to claim 1 focuses day and night bugeye lens, it is characterized in that: the airspace between emergent pupil group convex lens (B1) and diaphragm is zero.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510739987.3A CN105259644B (en) | 2015-11-04 | 2015-11-04 | A kind of 2.3mm focuses day and night bugeye lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510739987.3A CN105259644B (en) | 2015-11-04 | 2015-11-04 | A kind of 2.3mm focuses day and night bugeye lens |
Publications (2)
| Publication Number | Publication Date |
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| CN105259644A true CN105259644A (en) | 2016-01-20 |
| CN105259644B CN105259644B (en) | 2017-09-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510739987.3A Active CN105259644B (en) | 2015-11-04 | 2015-11-04 | A kind of 2.3mm focuses day and night bugeye lens |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106154500A (en) * | 2016-08-30 | 2016-11-23 | 广东弘景光电科技股份有限公司 | Low cost big Radix Rumicis high definition optical system and the camera lens of application thereof |
| CN106249384A (en) * | 2016-08-30 | 2016-12-21 | 福建福光股份有限公司 | A kind of super economical 3.6mm aspheric surface day and night confocal optical system |
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| JP2004021158A (en) * | 2002-06-20 | 2004-01-22 | Pentax Corp | Endoscope objective optical system and endoscope |
| CN202916483U (en) * | 2012-10-20 | 2013-05-01 | 中山联合光电科技有限公司 | Miniature optical lens with ultra-wide angle and small distortion applied to monitoring and vehicle-mounted occasions |
| CN103499875A (en) * | 2013-10-29 | 2014-01-08 | 姚学文 | Extra wide angle lens |
| CN104820278A (en) * | 2014-01-31 | 2015-08-05 | Hoya株式会社 | Wide-angle lens |
| CN205193341U (en) * | 2015-11-04 | 2016-04-27 | 福建福光股份有限公司 | 2. 3mm focus dual -purpose super wide angle lens of day night |
-
2015
- 2015-11-04 CN CN201510739987.3A patent/CN105259644B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004021158A (en) * | 2002-06-20 | 2004-01-22 | Pentax Corp | Endoscope objective optical system and endoscope |
| CN202916483U (en) * | 2012-10-20 | 2013-05-01 | 中山联合光电科技有限公司 | Miniature optical lens with ultra-wide angle and small distortion applied to monitoring and vehicle-mounted occasions |
| CN103499875A (en) * | 2013-10-29 | 2014-01-08 | 姚学文 | Extra wide angle lens |
| CN104820278A (en) * | 2014-01-31 | 2015-08-05 | Hoya株式会社 | Wide-angle lens |
| CN205193341U (en) * | 2015-11-04 | 2016-04-27 | 福建福光股份有限公司 | 2. 3mm focus dual -purpose super wide angle lens of day night |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106154500A (en) * | 2016-08-30 | 2016-11-23 | 广东弘景光电科技股份有限公司 | Low cost big Radix Rumicis high definition optical system and the camera lens of application thereof |
| CN106249384A (en) * | 2016-08-30 | 2016-12-21 | 福建福光股份有限公司 | A kind of super economical 3.6mm aspheric surface day and night confocal optical system |
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| Publication number | Publication date |
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| CN105259644B (en) | 2017-09-26 |
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