CN104459962A - Power 2.8-12 zoom and power focus monitoring lens and control method thereof - Google Patents
Power 2.8-12 zoom and power focus monitoring lens and control method thereof Download PDFInfo
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- CN104459962A CN104459962A CN201410776031.6A CN201410776031A CN104459962A CN 104459962 A CN104459962 A CN 104459962A CN 201410776031 A CN201410776031 A CN 201410776031A CN 104459962 A CN104459962 A CN 104459962A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B15/00—Optical objectives with means for varying the magnification
- G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
- G02B15/16—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group
- G02B15/177—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a negative front lens or group of lenses
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- 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
- G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Nonlinear Science (AREA)
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Abstract
The invention relates to a power 2.8-12 zoom and power focus monitoring lens and a control method thereof. The lens comprises a front group lens base and a rear group lens base, the front group lens base is movably installed in a front group lens barrel, the front group lens barrel is sleeved with a front group sector cam driving the front group lens base to move back and forth, the rear group lens base is movably installed in a rear group lens barrel, the rear group lens barrel is sleeved with a rear cam driving the rear group lens base to move back and forth, and the front group lens barrel and the rear group lens barrel are connected with a reduction box respectively through two main body guide pins; a focus stepping motor and a zoom stepping motor are arranged in the reduction box, a focus gear meshed with an output gear of the focus stepping motor is integrally manufactured on the front group sector cam, and a lot of manpower and material resources are saved; the focus stepping motor and the zoom stepping motor are arranged on the same side of the reduction box, so that the problem of structure interference is solved; the step number of the two stepping motors is 3400, so focus accuracy is high, the structure is reasonable and production is easy.
Description
Technical field
The present invention relates to the imaging lens device of supervisory system, particularly a kind of electronic 2.8-12 zoom, Power focus monitoring camera and control method thereof.
Background technology
Along with the fast development of science and technology, the raising gradually of people's awareness of safety, also more and more higher to the requirement of camera lens quality, as required, high strength, high impact-resistant, utilization temperature range are wide, electromechanical controls.Along with the continuous maturing of mould, camera lens is also corresponding easily by plastic.For camera lens manufacturer, the camera lens of batch production wants that consistance is good, yield is high, rear burnt consistance is good, and plastic cement is that good material is selected.
In monitoring trade, although conventional MFZ camera lens is also adopt power zoom, Power focus, its step number is few, focusing accuracy is not high, the deficiency of structure, produce the problems such as numerous and diverse.As: 1, MFZ number of motor steps 1000 step; 2, gear and the cam of focus groups that adopt of MFZ independently, is fixed as one by screw locking, a large amount of human and material resources of need; 3, focus motor and zoom motor separate both sides, and structure such as easily to interfere at the problem.
Summary of the invention
In order to overcome the deficiencies in the prior art, the object of the present invention is to provide that a kind of step number is many, focusing accuracy is high, rational in infrastructure and produce and be easy to electronic 2.8-12 zoom, Power focus monitoring camera and control method thereof.
To achieve these goals, technical scheme one of the present invention is: a kind of electronic 2.8-12 zoom, Power focus monitoring camera, the physical construction of described camera lens comprises for installing front group of A front arrangement of mirrors seat and the rear arrangement of mirrors seat for installing rear group of B, described front arrangement of mirrors seat is movably installed in front arrangement of mirrors cylinder, the front group of sector that before driving, arrangement of mirrors seat is movable is arranged with outside described front arrangement of mirrors cylinder, described rear arrangement of mirrors seat is movably installed in rear arrangement of mirrors cylinder, the rear cam that after driving, arrangement of mirrors seat is movable is arranged with outside described rear arrangement of mirrors cylinder, described front arrangement of mirrors cylinder is connected with reducer casing respectively by two main body guide pins with rear arrangement of mirrors cylinder, be provided with in described reducer casing and focus on stepper motor and zoom stepper motor, before described, group sector is made with and the focusing gear focusing on stepper motor output gear and be meshed, evenly offer three helicla flutes inside group sector before described, described front arrangement of mirrors seat has the protruding pin stretched in corresponding helicla flute, described rear cam arranged outside has the rear group of sector gear be meshed with zoom stepper motor output gear, evenly offers three helicla flutes inside described rear cam, and described rear arrangement of mirrors seat has the protruding pin stretched in corresponding helicla flute, described focusing stepper motor and zoom stepper motor are arranged at the same side of reducer casing, and two stepper motor steps are 3400 steps, the focal length of described camera lens is 2.8 ~ 12mm.
Further, the optical system of described camera lens along light direction be provided with successively focal power be negative before to organize A, iris C and focal power be rear group of positive B, the first gummed group that before described, group A is provided with negative selenodont lens A-1 successively and is touched by biconcave lens A-2 and biconvex lens A-3, the second gummed group, biconvex lens B-5 and biconvex lens B-6 that described rear group of B is provided with biconvex lens B-1, negative selenodont lens B-2 successively, is touched by biconvex lens B-3 and biconcave lens B-4.
Further, the airspace between described front group of A and rear group of B is 20.653 ~ 2.3mm.
Further, the negative selenodont lens A-1 in described front group A and the airspace between the first gummed group are 3.354mm.
Further, the first gummed group in described front group A and the airspace between iris C are 12.045 ~ 1.88mm.
Further, the airspace between the biconvex lens B-1 in described iris C and rear group of B is 6.959 ~ 0.42mm.
Further, biconvex lens B-1 in described rear group of B and the airspace between negative selenodont lens B-2 are 1.010mm, airspace between described negative selenodont lens B-2 and the second gummed group is 0.925mm, airspace between described second gummed group and biconvex lens B-5 is 1.632mm, and the airspace between described biconvex lens B-5 and biconvex lens B-6 is 0.342mm.
To achieve these goals, technical scheme two of the present invention is: a kind of electronic 2.8-12 zoom, Power focus monitoring camera control method, adopt electronic 2.8-12 zoom as above, Power focus monitoring camera, front group of sector and rear group of sector gear is driven respectively by two stepper motors, front group of A and rear group of B is moved forward and backward, and then realizes Power focus and the zoom of camera lens.
Compared with prior art, the present invention has following beneficial effect:
(1) the reasonable distribution focal power of front group of A and rear group of B in the optical system of retrofocus type; In rear group of B, 3rd arrangement of mirrors sheet of three-chip type Ke Ke type structure is changed into cemented doublet group, to share the focal power of rear group, be beneficial to and improve camera lens relative aperture, be beneficial to the aberration correction of camera lens, especially the correction of wide spectral aberration, makes camera lens reach the short performance index of object lens of large relative aperture, wide-angle, structure length.
(2) by the optical glass material of reasonable selection forward and backward two groups nine seven groups, select the optical glass material of high index of refraction, low dispersion as far as possible; By area of computer aided optical design and optimization, correct the various aberrations of optical lens perfectly, make the resolution of camera lens high, the requirement of 3,000,000 pixel high definition video shootings can be adapted to.
(3) when optical design, aberration correction and balance are carried out to the wide spectral range of 480nm ~ 850nm, make camera lens have excellent picture element at wide spectral range, achieve wide spectral confocal; Make camera lens can not only blur-free imaging under photoenvironment in the daytime, night pole low-light (level) or zero illumination environment under also can blur-free imaging by infrared light filling, the monitoring continuously that achieves 24 hours, and when day and night switching not defocusing, focus without the need to scene.
(4) this camera lens uses reinforced plastic, has high strength, HI high impact, advantage that serviceability temperature scope is wide, and electromechanical controls, and the consistance of batch production is good, yield is high, rear burnt consistance is good.
Below in conjunction with the drawings and specific embodiments, elaboration detailed is further done to the present invention.
Accompanying drawing explanation
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.
In figure: group A before A-, A-1-bears selenodont lens A-1, A-2-biconcave lens A-2, A-3-biconvex lens A-3, B is organized after B-, B-1-biconvex lens B-1, B-2-bear selenodont lens B-2, B-3-biconvex lens B-3, B-4-biconcave lens B-4, B-5-biconvex lens B-5, B-6-biconvex lens B-6, C-iris C; Arrangement of mirrors cylinder before 1-, arrangement of mirrors seat before 2-, group sector before 3-, 4-CD-ROM drive, cam after 5-, arrangement of mirrors seat after 6-, arrangement of mirrors cylinder after 7-, 8-reducer casing, organizes sector gear after 9-.
Embodiment
As shown in Figure 1 and 2, a kind of electronic 2.8-12 zoom, Power focus monitoring camera, the physical construction of described camera lens comprises for installing front group of A front arrangement of mirrors seat 2 and the rear arrangement of mirrors seat 6 for installing rear group of B, melt in the front arrangement of mirrors seat 2 and rear arrangement of mirrors seat 6 respectively by the eyeglasses of nine seven groups, described front arrangement of mirrors seat 2 is movably installed in front arrangement of mirrors cylinder 1, the front group of sector 3 that before driving, arrangement of mirrors seat 2 is movable is arranged with outside described front arrangement of mirrors cylinder 1, described rear arrangement of mirrors seat 6 is movably installed in rear arrangement of mirrors cylinder 7, the rear cam 5 that after driving, arrangement of mirrors seat 6 is movable is arranged with outside described rear arrangement of mirrors cylinder 7, described front arrangement of mirrors cylinder 1 is connected with reducer casing 8 respectively by two main body guide pins with rear arrangement of mirrors cylinder 7, be provided with in described reducer casing 8 and focus on stepper motor and zoom stepper motor, before described, group sector 3 is made with and the focusing gear focusing on stepper motor output gear and be meshed, evenly offer three helicla flutes inside group sector 3 before described, described front arrangement of mirrors seat 2 has the protruding pin stretched in corresponding helicla flute, described rear cam 5 arranged outside has the rear group of sector gear 9 be meshed with zoom stepper motor output gear, evenly offers three helicla flutes inside described rear cam 5, and described rear arrangement of mirrors seat 6 has the protruding pin stretched in corresponding helicla flute, described focusing stepper motor and zoom stepper motor are arranged at the same side of reducer casing 8, and two stepper motor steps are 3400 steps, the focal length of described camera lens is 2.8 ~ 12mm.
In the present embodiment, the optical system of described camera lens along light from left to right incident direction be provided with successively focal power be negative before to organize A, iris C and focal power be rear group of positive B, the first gummed group that before described, group A is provided with negative selenodont lens A-1 successively and is touched by biconcave lens A-2 and biconvex lens A-3, the second gummed group, biconvex lens B-5 and biconvex lens B-6 that described rear group of B is provided with biconvex lens B-1, negative selenodont lens B-2 successively, is touched by biconvex lens B-3 and biconcave lens B-4.
In the present embodiment, airspace between described front group of A and rear group of B is 20.653 ~ 2.3mm, the first gummed group before described in group A and the airspace between iris C are 12.045 ~ 1.88mm, and the airspace between the biconvex lens B-1 in described iris C and rear group of B is 6.959 ~ 0.42mm.
In the present embodiment, the negative selenodont lens A-1 in described front group A and the airspace between the first gummed group are 3.354mm; Biconvex lens B-1 in described rear group of B and the airspace between negative selenodont lens B-2 are 1.010mm, airspace between described negative selenodont lens B-2 and the second gummed group is 0.925mm, airspace between described second gummed group and biconvex lens B-5 is 1.632mm, and the airspace between described biconvex lens B-5 and biconvex lens B-6 is 0.342mm.
In the present embodiment, the technical indicator of this camera lens realization is as follows: (1) focal length: f '=2.8 ~ 12mm; (2) relative aperture: D/F=1/1.4; (3) field angle 2 ω: 106 ° ~ 32 ° (effective imaging surface n ' >=φ 6.72mm); (4) spectral range: 480nm ~ 850nm is suitable for; (5) resolution: adaptive with the high-definition camera of 2,000,000 pixels; (6) light path overall length ∑ L≤50mm.
Because the resolution of this camera lens is very high, and the resolution of peripheral field and central market does not allow to make a big difference, so will guarantee the accurate, steadily and good hand touch of the actions such as the concentricity of each constituent element of system and focusing in structural design.
The reasonable distribution focal power of front group of A and rear group of B in the optical system of this retrofocus type; Machine Design uses reinforced plastic (comprising lens barrel, microscope base, cam and reducer casing), improve camera lens yield, rear burnt consistance, and use two stepper motors to drive camera lens to carry out power zoom, focusing respectively; The cooperation of optics and machinery, really realizes the power zoom of 1,000,000 high definition camera lenses, focusing.
The present invention upgrades to MFZ2.0 camera lens by MFZ camera lens, and MFZ2.0 camera lens step number is more than three times of MFZ, focusing accuracy is high, also improve MFZ structure deficiency, produce numerous and diverse problem, has the following advantages: 1, two stepper motor steps are 3400 steps; 2, the gear focused on and cam are one, a large amount of human and material resources of saving; 3, focusing stepper motor and zoom stepper motor are placed on the same side, solve constructive interference problem.
As shown in Figure 2, a kind of electronic 2.8-12 zoom, Power focus monitoring camera control method, adopt electronic 2.8-12 zoom as above, Power focus monitoring camera, front group of sector 3 and rear group of sector gear 9 is driven respectively by two stepper motors, front group of A and rear group of B is moved forward and backward, and then realizes Power focus and the zoom of camera lens.If again by communications protocol softwares such as rear ends 485, then can realize remote electric accurately controls, and really realizes lens zoom function.
The foregoing is only preferred embodiment of the present invention, all equalizations done according to the present patent application the scope of the claims change and modify, and all should belong to covering scope of the present invention.
Claims (8)
1. an electronic 2.8-12 zoom, Power focus monitoring camera, it is characterized in that: the physical construction of described camera lens comprises for installing front group of A front arrangement of mirrors seat and the rear arrangement of mirrors seat for installing rear group of B, described front arrangement of mirrors seat is movably installed in front arrangement of mirrors cylinder, the front group of sector that before driving, arrangement of mirrors seat is movable is arranged with outside described front arrangement of mirrors cylinder, described rear arrangement of mirrors seat is movably installed in rear arrangement of mirrors cylinder, the rear cam that after driving, arrangement of mirrors seat is movable is arranged with outside described rear arrangement of mirrors cylinder, described front arrangement of mirrors cylinder is connected with reducer casing respectively by two main body guide pins with rear arrangement of mirrors cylinder, be provided with in described reducer casing and focus on stepper motor and zoom stepper motor, before described, group sector is made with and the focusing gear focusing on stepper motor output gear and be meshed, evenly offer three helicla flutes inside group sector before described, described front arrangement of mirrors seat has the protruding pin stretched in corresponding helicla flute, described rear cam arranged outside has the rear group of sector gear be meshed with zoom stepper motor output gear, evenly offers three helicla flutes inside described rear cam, and described rear arrangement of mirrors seat has the protruding pin stretched in corresponding helicla flute, described focusing stepper motor and zoom stepper motor are arranged at the same side of reducer casing, and two stepper motor steps are 3400 steps, the focal length of described camera lens is 2.8 ~ 12mm.
2. electronic 2.8-12 zoom according to claim 1, Power focus monitoring camera, it is characterized in that: the optical system of described camera lens along light direction be provided with successively focal power be negative before organize A, iris C and focal power are rear group of positive B, the first gummed group that before described, group A is provided with negative selenodont lens A-1 successively and is touched by biconcave lens A-2 and biconvex lens A-3, described rear group of B is provided with biconvex lens B-1 successively, negative selenodont lens B-2, the second gummed group of being touched by biconvex lens B-3 and biconcave lens B-4, biconvex lens B-5 and biconvex lens B-6.
3. electronic 2.8-12 zoom according to claim 2, Power focus monitoring camera, is characterized in that: the airspace between described front group of A and rear group of B is 20.653 ~ 2.3mm.
4. the electronic 2.8-12 zoom according to Claims 2 or 3, Power focus monitoring camera, is characterized in that: the negative selenodont lens A-1 before described in group A and the airspace between the first gummed group are 3.354mm.
5. the electronic 2.8-12 zoom according to Claims 2 or 3, Power focus monitoring camera, is characterized in that: the first gummed group before described in group A and the airspace between iris C are 12.045 ~ 1.88mm.
6. the electronic 2.8-12 zoom according to Claims 2 or 3, Power focus monitoring camera, is characterized in that: the airspace between the biconvex lens B-1 in described iris C and rear group of B is 6.959 ~ 0.42mm.
7. the electronic 2.8-12 zoom according to Claims 2 or 3, Power focus monitoring camera, it is characterized in that: the biconvex lens B-1 in described rear group of B and the airspace between negative selenodont lens B-2 are 1.010mm, airspace between described negative selenodont lens B-2 and the second gummed group is 0.925mm, airspace between described second gummed group and biconvex lens B-5 is 1.632mm, and the airspace between described biconvex lens B-5 and biconvex lens B-6 is 0.342mm.
8. an electronic 2.8-12 zoom, Power focus monitoring camera control method, it is characterized in that: adopt electronic 2.8-12 zoom as claimed in claim 1, Power focus monitoring camera, front group of sector and rear group of sector gear is driven respectively by two stepper motors, front group of A and rear group of B is moved forward and backward, and then realizes Power focus and the zoom of camera lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410776031.6A CN104459962B (en) | 2014-12-17 | 2014-12-17 | Electronic 2.8-12 zoom, Power focus monitoring camera and control method thereof |
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| CN201410776031.6A CN104459962B (en) | 2014-12-17 | 2014-12-17 | Electronic 2.8-12 zoom, Power focus monitoring camera and control method thereof |
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| CN104459962A true CN104459962A (en) | 2015-03-25 |
| CN104459962B CN104459962B (en) | 2016-09-21 |
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Cited By (4)
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| CN105259646A (en) * | 2015-11-06 | 2016-01-20 | 福建福光股份有限公司 | 2.8-8mm small-size zoom lens |
| CN105676431A (en) * | 2016-04-14 | 2016-06-15 | 南京昂驰光电科技有限公司 | Front lens barrel assembly used for star-light level road monitoring zoom lens |
| CN106154481A (en) * | 2016-08-26 | 2016-11-23 | 福建福光股份有限公司 | A kind of mould camera lens and assembly technology thereof |
| CN110109232A (en) * | 2019-05-14 | 2019-08-09 | 福建福光股份有限公司 | A kind of zoom lens and its imaging method |
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| CN103116210A (en) * | 2013-02-20 | 2013-05-22 | 福建福光数码科技有限公司 | Power zoom, power focusing and full plastic 3-megapixel lens capable of being used in the day and at night |
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| JP2005099091A (en) * | 2003-09-22 | 2005-04-14 | Olympus Corp | Zoom lens and electronic imaging apparatus using the same |
| JP2007171743A (en) * | 2005-12-26 | 2007-07-05 | Olympus Imaging Corp | Zoom lens and imaging apparatus having same |
| CN101211001A (en) * | 2006-12-31 | 2008-07-02 | 深圳市大族激光科技股份有限公司 | Zooming expander |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105259646A (en) * | 2015-11-06 | 2016-01-20 | 福建福光股份有限公司 | 2.8-8mm small-size zoom lens |
| CN105676431A (en) * | 2016-04-14 | 2016-06-15 | 南京昂驰光电科技有限公司 | Front lens barrel assembly used for star-light level road monitoring zoom lens |
| CN106154481A (en) * | 2016-08-26 | 2016-11-23 | 福建福光股份有限公司 | A kind of mould camera lens and assembly technology thereof |
| CN110109232A (en) * | 2019-05-14 | 2019-08-09 | 福建福光股份有限公司 | A kind of zoom lens and its imaging method |
| CN110109232B (en) * | 2019-05-14 | 2021-02-26 | 福建福光股份有限公司 | Zoom lens and imaging method thereof |
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|---|---|
| CN104459962B (en) | 2016-09-21 |
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Address after: 158 No. 350015 Fujian province Fuzhou Mawei District Jiangbin East Avenue Applicant after: FUJIAN FORECAM CO., LTD. Address before: 158 No. 350015 Fujian province Fuzhou Mawei District Jiangbin East Avenue Applicant before: Fujian Forecam Optics Co., Ltd. |
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