CN202904104U - Ultra-wide-angle day and night zoom lens - Google Patents

Ultra-wide-angle day and night zoom lens Download PDF

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Publication number
CN202904104U
CN202904104U CN 201220614927 CN201220614927U CN202904104U CN 202904104 U CN202904104 U CN 202904104U CN 201220614927 CN201220614927 CN 201220614927 CN 201220614927 U CN201220614927 U CN 201220614927U CN 202904104 U CN202904104 U CN 202904104U
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CN
China
Prior art keywords
eyeglass
microscope base
lens
concave
main cylinder
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Active
Application number
CN 201220614927
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Chinese (zh)
Inventor
吴富宝
黄统樑
江东明
吴联贵
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xiamen Li Ding Au Optronics Co
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Xiamen Leading Optics Co Ltd
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Priority to CN 201220614927 priority Critical patent/CN202904104U/en
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Abstract

The utility model discloses an ultra-wide-angle day and night zoom lens, which comprises a body tube, a front microscope base and a back microscope base. The front microscope base is installed on the inner surface of the front portion of the body tube and can move axially relative to the front portion of the body tube. The back microscope base is installed on the inner surface of the back portion of the body tube and can move axially relative to the back portion of the body tube. A diaphragm is installed on the inner surface of the body tube between the front microscope base and the back microscope base. The front microscope base is fixed with a front negative-power lens assembly. The back microscope base is fixed with a back positive-power lens assembly. The front lens assembly successively contains the following parts along the illumination direction: a first meniscus concave-convex lens, a second meniscus concave-convex lens, a third biconcave lens and a fourth biconvex lens. The back lens assembly successively contains the following parts along the illumination direction: a fifth biconvex lens, a sixth concave-convex lens and a seventh convex-plane lens. The sixth concave-convex lens and the seventh convex-plane lens are cemented lens. The ultra-wide-angle day and night zoom lens provided by the utility model has advantages of large clear aperture and large incident field angle, is greatly suitable for monitoring and camera shooting of visible light and infrared light, and meets the requirement of shooting at low illumination levels.

Description

But a kind of zoom lens of super wide-angle day and night
Technical field
The utility model relates to the zoom lens of the usefulness of making a video recording, but especially a kind of zoom lens of super wide-angle day and night.
Background technology
In the monitoring technique field, a lot of occasions need to be carried out 24 hours monitoring cameras of whole day, because be visible light wave range daytime, be infrared band evening, and the existing most of zoom monitoring cameras that match with video camera are by day in the situation, although its image quality can reach requirement, but in the situation of monitoring, image blur, the poor problem of image quality will occur at night, namely occur " defocusing phenomenon ".
In addition, because the variation in monitoring place, some place needs the monitoring range of camera lens larger, therefore just require camera lens can realize super wide-angle, so just require the clear aperature of camera lens large, light incident field angle is large, but their clear aperature of zoom lens that comprises in the market super wide-angular field is less, be generally: relative aperture D/f ' 1/2.0, be difficult to satisfy the shooting in the low-light (level) situation.
The utility model content
But the technical problems to be solved in the utility model provides a kind of zoom lens of super wide-angle day and night, clear aperature is large, light incident field angle is large, the monitoring camera that can better adapt to visible light and infrared light, monitoring range is large, imaging clearly is stable, can satisfy the needs of the shooting in the low-light (level) situation.
For achieving the above object, the technical solution of the utility model is: but a kind of zoom lens of super wide-angle day and night, comprise main cylinder, front microscope base, rear microscope base, front microscope base is contained on the anterior inside surface of main cylinder, front focusing ring is housed on the outside surface of main cylinder front portion can axially move with respect to a main cylinder front portion front microscope base, rear microscope base is contained on the inside surface at main cylinder rear portion, the back focusing ring is housed on the outside surface at main cylinder rear portion can axially move with respect to main cylinder rear portion rear microscope base, on the main tube inner surface between front microscope base and the rear microscope base diaphragm is housed, be fixed with the front lens group of negative power on the front microscope base, be fixed with the rear mirror group of positive light coke on the rear microscope base, described front lens group is followed successively by falcate convex-concave the first eyeglass along entering light direction, falcate convex-concave the second eyeglass, concave-concave prismatic glasses and biconvex the 4th eyeglass; Described rear mirror group is followed successively by biconvex the 5th eyeglass, convex-concave the 6th eyeglass and convex flat the 7th eyeglass along entering light direction, and convex-concave the 6th eyeglass and convex flat the 7th eyeglass are the gummed eyeglass.
The focal length of preferred described front lens group is-9.5376mm that the focal length of rear mirror group is 12.0482mm.Better guaranteed the realization of super wide field focus.
Preferred described falcate convex-concave the first eyeglass clear aperature is 25.5mm.Effectively guaranteed the large clear aperature of zoom system, pancreatic system, guaranteed that light has the realization of larger incident field angle and super wide field focus.
Preferred described falcate convex-concave the second eyeglass is that refractive index is 1.79 flint glass eyeglass.The light that guarantees large field angle incident can be all by second eyeglass after by the first eyeglass, and high index of refraction makes light refraction more concentrated, is beneficial to various aberration corrections.
Preferred described biconvex the 5th eyeglass two-sided is aspheric surface shape.Effectively reduce the aberration such as size, distortion, spherical aberration, coma, astigmatism of camera lens, guaranteed the high resolving power of camera lens.
Further improve, on the described front focusing ring the first lock screw is housed, lock the first lock screw and can make front focusing ring and the mutually locking of main cylinder.Lock mutually with main cylinder after making things convenient for front lens group to adjust focal length.
Further improve, on the described back focusing ring the second lock screw is housed, lock the second lock screw and can make back focusing ring and the mutually locking of main cylinder.The mirror group locks mutually with main cylinder after adjusting focal length after convenient.
Further improve, described diaphragm is adjustable diaphragm, regulates by the regulating ring that is loaded on main cylinder middle part outside surface, and the 3rd lock screw is housed on the described regulating ring, locks the 3rd lock screw and can make regulating ring and the mutually locking of main cylinder.Lock mutually with main cylinder after making things convenient for diaphragm to adjust.
The utility model is owing to be fixed with the front lens group of negative power on the front microscope base, be fixed with the rear mirror group of positive light coke on the rear microscope base, described front lens group is followed successively by falcate convex-concave the first eyeglass, falcate convex-concave the second eyeglass, concave-concave prismatic glasses and biconvex the 4th eyeglass along entering light direction; Described rear mirror group is followed successively by biconvex the 5th eyeglass, convex-concave the 6th eyeglass and convex flat the 7th eyeglass along entering light direction, and convex-concave the 6th eyeglass and convex flat the 7th eyeglass are the gummed eyeglass; Front lens group and rear mirror group can be adjusted separately with respect to the distance of diaphragm simultaneously, this optical texture, by rational parameter designing, just can be at visible light wave range and infrared band while aberration correction, better adapt to the monitoring camera of visible light and infrared light, imaging clearly is stable.
On the other hand, because front lens group and rear mirror group adopt two group linkage type structures of front four rear three, the first eyeglass is that falcate convex-concave eyeglass, the second eyeglass also are falcate convex-concave eyeglass, can ensure larger clear aperature, the incident field angle of light is large, make camera lens can realize super wide-angle, monitoring range is large.
The utility model has again the incident field angle of large clear aperature and light because of the monitoring camera of energy simultaneous adaptation visible light and infrared light, can satisfy the needs that the video camera in the low-light (level) situation is taken.
Description of drawings
Fig. 1 is structure cut-open view of the present utility model.
Embodiment
Below in conjunction with accompanying drawing and concrete embodiment the utility model is described in further detail.
Shown in Figure 1, but a kind of zoom lens of super wide-angle day and night, comprise main cylinder 1, front microscope base 2, rear microscope base 3, front microscope base 2 is contained on the inside surface of main cylinder 1 front portion, front focusing ring 4 is housed on the outside surface of main cylinder 1 front portion can axially move with respect to main cylinder 1 front portion front microscope base 2, rear microscope base 3 is contained on the inside surface at main cylinder 1 rear portion, back focusing ring 5 is housed on the outside surface at main cylinder 1 rear portion can axially move with respect to main cylinder 1 rear portion rear microscope base 3, on main cylinder 1 inside surface between front microscope base 2 and the rear microscope base 3 diaphragm 6 is housed, be fixed with the front lens group 7 of negative power on the front microscope base 2, be fixed with the rear mirror group 8 of positive light coke on the rear microscope base 3, described front lens group 7 is followed successively by falcate convex-concave the first eyeglass 71 along entering light direction, falcate convex-concave the second eyeglass 72, concave-concave prismatic glasses 73 and biconvex the 4th eyeglass 74; Described rear mirror group 8 is followed successively by biconvex the 5th eyeglass 81, convex-concave the 6th eyeglass 82 and convex flat the 7th eyeglass 83 along entering light direction, and convex-concave the 6th eyeglass 82 and convex flat the 7th eyeglass 83 are the gummed eyeglass.
The focal length of described front lens group 7 is preferably-9.5376mm, and the focal length of rear mirror group 8 is preferably 12.0482mm.
Described falcate convex-concave the first eyeglass 71 clear aperatures are preferably 25.5mm.
It is 1.79 flint glass eyeglass that described falcate convex-concave the second eyeglass 72 is preferably refractive index.
Described biconvex the 5th eyeglass 81 two-sided is aspheric surface shape.
At front focusing ring 4 the first lock screw 41 is housed, locks the first lock screw 41 and can make front focusing ring 4 and the mutually locking of main cylinder 1.
At back focusing ring 5 the second lock screw 51 is housed, locks the second lock screw 51 and can make back focusing ring 5 and the mutually locking of main cylinder 1.
Described diaphragm 6 can be selected adjustable diaphragm, regulates by the regulating ring 9 that is loaded on main cylinder 1 middle part outside surface, and the 3rd lock screw 91 is housed on the described regulating ring 9, locks the 3rd lock screw 91 and can make regulating ring 9 and the mutually locking of main cylinder 1.
Described the 6th eyeglass 82 can be selected the flint glass eyeglass of the low Abbe number of high index of refraction, described the 7th eyeglass 83 can select the crown glass eyeglass of low-refraction high Abbe number then to glue together, this two gummed eyeglass can greatly reduce the aberration of system, has guaranteed good picture element and higher resolution.
Described prismatic glasses 73 can be selected the crown glass eyeglass of high Abbe number, is used for the aberration of control system.
Described the 4th eyeglass 74 can be selected the dense flint glass eyeglass of high index of refraction, organizes the focal power amount of bearing before effectively lowering, and lowers the senior aberration of system, promotes the resolution of imaging system.
Other major parameter of present embodiment is: focal length: f2.5-15mm, and relative aperture: D/f '=1/1.65-1/4.2, field angle 2W:134 °--25 °, (as square linear field 2 η 〉=φ 6.0mm); Optical texture length: Σ L≤70.28mm; Applicable spectral range: 480nm-850nm.
Below only be preferred embodiment of the utility model, the change that those skilled in the art does to be equal to by claim all falls into the protection domain of this case.

Claims (8)

1. but the zoom lens of a super wide-angle day and night, comprise main cylinder, front microscope base, rear microscope base, front microscope base is contained on the anterior inside surface of main cylinder, front focusing ring is housed on the outside surface of main cylinder front portion can axially move with respect to a main cylinder front portion front microscope base, rear microscope base is contained on the inside surface at main cylinder rear portion, the back focusing ring is housed on the outside surface at main cylinder rear portion can axially move with respect to main cylinder rear portion rear microscope base, on the main tube inner surface between front microscope base and the rear microscope base diaphragm is housed, be fixed with the front lens group of negative power on the front microscope base, be fixed with the rear mirror group of positive light coke on the rear microscope base, it is characterized in that: described front lens group is followed successively by falcate convex-concave the first eyeglass along entering light direction, falcate convex-concave the second eyeglass, concave-concave prismatic glasses and biconvex the 4th eyeglass; Described rear mirror group is followed successively by biconvex the 5th eyeglass, convex-concave the 6th eyeglass and convex flat the 7th eyeglass along entering light direction, and convex-concave the 6th eyeglass and convex flat the 7th eyeglass are the gummed eyeglass.
2. but the zoom lens of a kind of super wide-angle day and night according to claim 1 is characterized in that: the focal length of described front lens group is-9.5376mm, and the focal length of rear mirror group is 12.0482mm.
3. but the zoom lens of a kind of super wide-angle day and night according to claim 1, it is characterized in that: described falcate convex-concave the first eyeglass clear aperature is 25.5mm.
4. but the zoom lens of a kind of super wide-angle day and night according to claim 1, it is characterized in that: described falcate convex-concave the second eyeglass is that refractive index is 1.79 flint glass eyeglass.
5. but the zoom lens of a kind of super wide-angle day and night according to claim 1 is characterized in that: described biconvex the 5th eyeglass two-sided is aspheric surface shape.
6. but the zoom lens of a kind of super wide-angle day and night according to claim 1 is characterized in that: on the described front focusing ring the first lock screw is housed, locks the first lock screw and can make front focusing ring and the mutually locking of main cylinder.
7. but the zoom lens of a kind of super wide-angle day and night according to claim 1 is characterized in that: on the described back focusing ring the second lock screw is housed, locks the second lock screw and can make back focusing ring and the mutually locking of main cylinder.
8. but according to claim 1 to the zoom lens of 7 each described a kind of super wide-angle day and nights, it is characterized in that: described diaphragm is adjustable diaphragm, regulate by the regulating ring that is loaded on main cylinder middle part outside surface, the 3rd lock screw is housed on the described regulating ring, locks the 3rd lock screw and can make regulating ring and the mutually locking of main cylinder.
CN 201220614927 2012-11-20 2012-11-20 Ultra-wide-angle day and night zoom lens Active CN202904104U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201220614927 CN202904104U (en) 2012-11-20 2012-11-20 Ultra-wide-angle day and night zoom lens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201220614927 CN202904104U (en) 2012-11-20 2012-11-20 Ultra-wide-angle day and night zoom lens

Publications (1)

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CN202904104U true CN202904104U (en) 2013-04-24

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104834076A (en) * 2015-05-26 2015-08-12 中山联合光电科技股份有限公司 Small-f-theta-distortion and high-resolution optical system
CN105137575A (en) * 2015-09-21 2015-12-09 中山联合光电科技股份有限公司 High/low temperature infrared confocal, large-aperture and small-size optical system
CN106094185A (en) * 2016-08-24 2016-11-09 厦门力鼎光电技术有限公司 A kind of ultra-wide angle leads to greatly the zoom lens of wide image planes

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104834076A (en) * 2015-05-26 2015-08-12 中山联合光电科技股份有限公司 Small-f-theta-distortion and high-resolution optical system
CN105137575A (en) * 2015-09-21 2015-12-09 中山联合光电科技股份有限公司 High/low temperature infrared confocal, large-aperture and small-size optical system
CN105137575B (en) * 2015-09-21 2017-06-30 中山联合光电科技股份有限公司 A kind of infrared confocal, large aperture of high/low temperature, small size optical system
CN106094185A (en) * 2016-08-24 2016-11-09 厦门力鼎光电技术有限公司 A kind of ultra-wide angle leads to greatly the zoom lens of wide image planes
CN106094185B (en) * 2016-08-24 2018-05-04 厦门力鼎光电技术有限公司 A kind of zoom lens of the big image planes of the big thang-kng of ultra-wide angle

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CP01 Change in the name or title of a patent holder

Address after: 361000 26 Xinmei Road, Xinyang Industrial Zone, Haicang, Xiamen, Fujian

Patentee after: Xiamen Li Ding Au Optronics Co

Address before: 361000 26 Xinmei Road, Xinyang Industrial Zone, Haicang, Xiamen, Fujian

Patentee before: Xiamen Leading Optics Co., Ltd.

CP01 Change in the name or title of a patent holder