CN103033914A - Miniaturized continuous zoom camera lens with large visual field - Google Patents
Miniaturized continuous zoom camera lens with large visual field Download PDFInfo
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Abstract
The invention relates to a miniaturized continuous zoom camera lens with a large visual field. A front fixing group A with positive focal power, a zoom group B with negative focal power, a variable diaphragm module C, a back fixing group D with positive focal power and a compensating group E with positive focal power are respectively arranged in an optical structure of the lens in a light incident direction from left to right; the front fixing group A is provided with a negative meniscus lens A-1, a double convex lens A-2 and a positive meniscus lens A-3 are in sequence; the zoom group B is provided with a double concave lens B-1 and a first bonding group in sequence, wherein the first bonding group is formed by closely connecting a double concave lens B-2 and a positive meniscus lens B-3; the back fixing group D is provided with a double convex lens D-1 and a negative meniscus lens D-2 in sequence; and the compensating group E is provided with a double convex lens E-1 and a second bonding group in sequence, wherein the second bonding group is formed by closely connecting a double convex lens E-2 and a double concave lens E-3. The miniaturized continuous zoom camera lens with the large visual field, provided by the invention, has the advantages of larger visual field angle, smaller volume and the like and has functions such as continuous electric zooming, electric focusing and electric dimming.
Description
Technical field
The present invention relates to a kind of large visual field miniaturization zoom pick-up lens.
Background technology
At present, the monitoring pick-up lens that is applicable to short-distance and medium-distance requires that observation scope is large, volume is little, quality is light, high definition, can do the panorama observation of large regional little multiplying power to target, can make again the amplifying observation of the large multiplying power in zonule.Traditional mechanical compensation formula zoom lens's optical texture form is made of front fixedly group, zoom group, compensation group and four constituent elements of rear fixedly group, but ubiquity, and volume is large, the visual field is less, zoom ratio is little, resolution is lower, with the shortcomings such as the high precision video camera does not mate, observing capacity is very limited.
Summary of the invention
The problem that the present invention is directed to above-mentioned prior art existence makes improvements, and namely the technical problem to be solved in the present invention provides a kind of large visual field miniaturization zoom pick-up lens.
In order to solve the problems of the technologies described above, technical scheme of the present invention is: a kind of large visual field miniaturization zoom pick-up lens, in the optical texture of described camera lens along light from left to right incident direction to be respectively equipped with focal power be positive front fixedly group A, focal power is negative zoom group B, iris assembly C, focal power is that positive rear fixedly group D and focal power is positive compensation group E, described front fixedly group A is provided with negative crescent moon lens A-1 successively, biconvex lens A-2 and positive crescent moon lens A-3, the first gummed group that described zoom group B is provided with successively biconcave lens B-1 and is connected airtight by biconcave lens B-2 and positive crescent moon lens B-3, described rear fixedly group D is provided with biconvex lens D-1 and negative crescent moon lens D-2, the second gummed group that described compensation group E is provided with successively biconvex lens E-1 and is connected airtight by biconvex lens E-2 and biconcave lens E-3 successively.
In technique scheme, airspace between described front fixedly group A and the zoom group B is 1.0mm ~ 24.7mm, airspace between described zoom group B and the iris assembly C is 25.0mm ~ 1.3mm, airspace between described iris assembly C and the rear fixedly group D is 1.2mm, and the airspace between described rear fixedly group D and the compensation group E is 9.5mm ~ 4.3mm.
In technique scheme, the negative crescent moon lens A-1 among the described front fixedly group A and the airspace between the biconvex lens A-2 are 6.8mm, and the airspace between described biconvex lens A-2 and the positive crescent moon lens A-3 is 0.1mm; Biconcave lens B-1 among the described zoom group B and the airspace between the first gummed group are 3.0mm, biconvex lens D-1 among the described rear fixedly group D and the airspace between the negative crescent moon lens D-2 are 0.1mm, and the biconvex lens E-1 among the described compensation group E and the airspace between the second gummed group are 0.1mm.
Compared with prior art, the present invention has following beneficial effect: this camera lens has the advantages such as larger field angle, small volume, its wide-angle side field angle 2 ω=89.6 °, its telescope end field angle 2 ω=12 ° have the functions such as continuous power zoom, electromotion focusing, electronic light modulation, and each motor drive mechanism flexible movements is reliable, each focal length section imaging is out of focus not, zoom overall process optical axis coaxiality is good, clear picture, and image planes are not beated.
The present invention is further detailed explanation below in conjunction with the drawings and specific embodiments.
Description of drawings
Fig. 1 is the structural drawing of optical system.
Fig. 2 is the structural drawing of power zoom mechanism.
Fig. 3 is the structural drawing of electromotion focusing mechanism.
Fig. 4 is the structural drawing of iris assembly.
Fig. 5 is the structural drawing of complete machine of the present invention.
Among the figure: 1-zoom Mobile base, 2-zoom mirror group, 3-guide rod, 4-zoom driving wheel, the 5-cam, 6-compensates Mobile base, 7-compensating glass group, 8-zoom motor, the 9-focusing mount, fixed mirror group before the 10-, 11-body tube, the 12-guide pin of focusing, the 13-motor of focusing, the 14-driving wheel of focusing, 15-light hurdle seat, 16-light hurdle sheet, 17-light hurdle rotating ring, 18-light hurdle transition wheel, 19-light modulation driving wheel, the 20-light dimming electric motor, 21-outer cover, 22-light hurdle group, fixed mirror group behind the 23-, fixing group before the A-, A-1-bears the crescent moon lens, the A-2-biconvex lens, the positive crescent moon lens of A-3-, B-zoom group, the B-1-biconcave lens, B-2-biconcave lens, the positive crescent moon lens of B-3-, C-iris assembly, fixing group behind the D-, D-1-biconvex lens, D-2-bears crescent moon lens, E-compensation group, E-1-biconvex lens, the E-2-biconvex lens, E-3-biconcave lens, F-target surface.
Embodiment
As shown in Figure 1, a kind of large visual field miniaturization zoom pick-up lens, in the optical texture of described camera lens along light from left to right incident direction to be respectively equipped with focal power be positive front fixedly group A, focal power is negative zoom group B, iris assembly C, focal power is that positive rear fixedly group D and focal power is positive compensation group E, described front fixedly group A is provided with negative crescent moon lens A-1 successively, biconvex lens A-2 and positive crescent moon lens A-3, the first gummed group that described zoom group B is provided with successively biconcave lens B-1 and is connected airtight by biconcave lens B-2 and positive crescent moon lens B-3, described rear fixedly group D is provided with biconvex lens D-1 and negative crescent moon lens D-2 successively, the second gummed group that described compensation group E is provided with successively biconvex lens E-1 and is connected airtight by biconvex lens E-2 and biconcave lens E-3, each arrangement of mirrors sheet are installed in the lens barrel of respective sets and have formed the mirror group.
In the present embodiment, airspace between described front fixedly group A and the zoom group B is 1.0mm ~ 24.7mm, airspace between described zoom group B and the iris assembly C is 25.0mm ~ 1.3mm, airspace between described iris assembly C and the rear fixedly group D is 1.2mm, and the airspace between described rear fixedly group D and the compensation group E is 9.5mm ~ 4.3mm.
In the present embodiment, the negative crescent moon lens A-1 among the described front fixedly group A and the airspace between the biconvex lens A-2 are 6.8mm, and the airspace between described biconvex lens A-2 and the positive crescent moon lens A-3 is 0.1mm; Biconcave lens B-1 among the described zoom group B and the airspace between the first gummed group are 3.0mm, biconvex lens D-1 among the described rear fixedly group D and the airspace between the negative crescent moon lens D-2 are 0.1mm, and the biconvex lens E-1 among the described compensation group E and the airspace between the second gummed group are 0.1mm.
In the present embodiment, the optical texture of described camera lens has reached following optical index: (1) field angle: short burnt 2 ω=89.6 °, long burnt 2 ω=12 °; (2) focal length: f '=3.55mm ~ 30mm; (3) relative aperture: short burnt D/f '=1/1.8, long burnt D/f ' is better than 1/2.7; (4) optical transfer function: during transport function spatial frequency 70lp/mm, MTF 〉=30%; (5) the optics overall length is less than 80mm.
Such as Fig. 2 and shown in Figure 5, the power zoom mechanism of described camera lens comprises zoom motor 8, the zoom Mobile base 1 of zoom mirror group 2 and the compensation Mobile base 6 that compensating glass group 7 is installed are installed, described zoom Mobile base 1 and compensation Mobile base 6 all can slide at two guide rods 3, zoom driving wheel 4 is installed on the motor shaft of described zoom motor 8, described zoom driving wheel 4 is precision gear, described zoom driving wheel 4 engagement band moving cams 5, offer zoom curved groove and compensated curve groove according to optimal design on the described cam 5, be fixed with the zoom guide pin that matches with the zoom curved groove on the described zoom Mobile base 1, be fixed with the compensation guide pin that matches with the compensated curve groove on the described compensation seat.
The present invention adopts the guide rod type type of belt drive to realize the power zoom of camera lens: described zoom motor 8 rotates by zoom driving wheel 4 band moving cams 5, described cam 5 drives respectively zoom Mobile base 1 by the zoom guide pin that slides in the zoom curved groove, the compensation guide pin that slides in the compensated curve groove and compensation Mobile base 6 moves forward and backward along guide rod 3, and then realizes the power zoom function.Lifting angle when rotating in order to reduce zoom process cam 5, the present invention can also change the linear movement track of zoom mirror group 2 into the nonlinear motion curve.
Such as Fig. 3 and shown in Figure 5, the electromotion focusing mechanism of described camera lens comprises focusing motor 13, the body tube 11 of the focusing mount 9 of front fixed mirror group 10 being installed and being positioned at the outside, focusing mount 9 rear ends, the focusing driving wheel 14 that is meshed with focusing mount 9 is installed on the motor shaft of described focusing motor 13, described focusing driving wheel 14 is precision gear, offer the guide groove that precision is milled system on the described body tube 11, be fixed with on the described focusing mount 9 with guide groove and match to guide its relative body tube 11 focusing guide pin 12 for the helical movement.
The present invention realizes the electromotion focusing of camera lens by the guide pin slide mechanism: described focusing motor 13 drives focusing mount 9 helical motions by focusing driving wheel 14, simultaneously by sliding in the focusing guide groove of guide pin 12 on body tube 11, guaranteed focusing mount 9(fixing group A namely) stability of motion.This electromotion focusing mechanism has the advantages such as focusing is quick, flexible, backlash is little, precision is high, structural member is few.
As shown in Figure 4 and Figure 5, described iris assembly comprises light hurdle seat 15, light hurdle sheet 16, light hurdle rotating ring 17 and light dimming electric motor 20, one end leading flank of described smooth hurdle sheet 16 is provided with the fixing pin in the hole of inserting light hurdle seat 15, the other end trailing flank riveted joint of described smooth hurdle sheet 16 has the movable pin that slides in the groove of light hurdle rotating ring 17, light modulation driving wheel 19 is installed on the motor shaft of described light dimming electric motor 20, described light modulation driving wheel 19 is precision gear, and described light modulation driving wheel 19 engagements drive the light hurdle transition wheel 18 that is meshed with light hurdle rotating ring 17.
The present invention realizes the Guang Lan hole adjusting of iris assembly by electric adjustable optical mechanisms such as light dimming electric motors: rotate when light dimming electric motor 20 drives light hurdle transition wheels 18 by light modulation driving wheel 19, described smooth hurdle transition wheel 18 just drives light hurdle rotating ring 17 and rotates, and then the movable pin that promotes on the light hurdle sheet 16 slides in the groove of light hurdle rotating ring 17,16 of described smooth hurdle sheets swing take fixing pin as fulcrum, and the Guang Lan hole just changes diameter along with the rotation of light hurdle sheet 16.This electric adjustable optical mechanism has fast, flexible, little, the precision advantages of higher of backlash.
The above only is preferred embodiment of the present invention, and all equalizations of doing according to the present patent application claim change and modify, and all should belong to covering scope of the present invention.
Claims (9)
1. large visual field miniaturization zoom pick-up lens, it is characterized in that: in the optical texture of described camera lens along light from left to right incident direction to be respectively equipped with focal power be positive front fixedly group A, focal power is negative zoom group B, iris assembly C, focal power is that positive rear fixedly group D and focal power is positive compensation group E, described front fixedly group A is provided with negative crescent moon lens A-1 successively, biconvex lens A-2 and positive crescent moon lens A-3, the first gummed group that described zoom group B is provided with successively biconcave lens B-1 and is connected airtight by biconcave lens B-2 and positive crescent moon lens B-3, described rear fixedly group D is provided with biconvex lens D-1 and negative crescent moon lens D-2, the second gummed group that described compensation group E is provided with successively biconvex lens E-1 and is connected airtight by biconvex lens E-2 and biconcave lens E-3 successively.
2. large visual field miniaturization zoom pick-up lens according to claim 1, it is characterized in that: the airspace between described front fixedly group A and the zoom group B is 1.0mm ~ 24.7mm, airspace between described zoom group B and the iris assembly C is 25.0mm ~ 1.3mm, airspace between described iris assembly C and the rear fixedly group D is 1.2mm, and the airspace between described rear fixedly group D and the compensation group E is 9.5mm ~ 4.3mm.
3. large visual field miniaturization zoom pick-up lens according to claim 1 and 2, it is characterized in that: the negative crescent moon lens A-1 among the described front fixedly group A and the airspace between the biconvex lens A-2 are 6.8mm, and the airspace between described biconvex lens A-2 and the positive crescent moon lens A-3 is 0.1mm.
4. large visual field miniaturization zoom pick-up lens according to claim 1 and 2, it is characterized in that: the biconcave lens B-1 among the described zoom group B and the airspace between the first gummed group are 3.0mm.
5. large visual field miniaturization zoom pick-up lens according to claim 1 and 2, it is characterized in that: the biconvex lens D-1 among the described rear fixedly group D and the airspace between the negative crescent moon lens D-2 are 0.1mm.
6. large visual field miniaturization zoom pick-up lens according to claim 1 and 2, it is characterized in that: the biconvex lens E-1 among the described compensation group E and the airspace between the second gummed group are 0.1mm.
7. large visual field miniaturization zoom pick-up lens according to claim 1, it is characterized in that: the power zoom mechanism of described camera lens comprises the zoom motor, the zoom Mobile base of zoom mirror group and the compensation Mobile base that the compensating glass group is installed are installed, described zoom Mobile base and compensation Mobile base all are slidingly matched with two guide rods, the zoom driving wheel is installed on the motor shaft of described zoom motor, described zoom driving wheel engagement band moving cam, offer zoom curved groove and compensated curve groove on the described cam, be fixed with the zoom guide pin that matches with the zoom curved groove on the described zoom Mobile base, be fixed with the compensation guide pin that matches with the compensated curve groove on the described compensation seat.
8. large visual field miniaturization zoom pick-up lens according to claim 1, it is characterized in that: the electromotion focusing mechanism of described camera lens comprises focusing motor, the body tube of the focusing mount of front fixed mirror group being installed and being positioned at the outside, focusing mount rear end, the focusing driving wheel that is meshed with focusing mount is installed on the motor shaft of described focusing motor, offer guide groove on the described body tube, be fixed with on the described focusing mount with guide groove and match the focusing guide pin that guides its relative body tube for the helical movement.
9. large visual field miniaturization zoom pick-up lens according to claim 1, it is characterized in that: described iris assembly comprises light hurdle seat, light hurdle sheet, light hurdle rotating ring and light dimming electric motor, one end leading flank of described smooth hurdle sheet is provided with the fixing pin in the hole of inserting light hurdle seat, the other end trailing flank of described smooth hurdle sheet is provided with the movable pin that slides in the groove of light hurdle rotating ring, the light modulation driving wheel is installed on the motor shaft of described light dimming electric motor, and described light modulation driving wheel engagement drives the light hurdle transition wheel that is meshed with light hurdle rotating ring.
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| CN201310004651.3A CN103033914B (en) | 2013-01-07 | 2013-01-07 | Miniaturized continuous zoom camera lens with large visual field |
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| CN201310004651.3A CN103033914B (en) | 2013-01-07 | 2013-01-07 | Miniaturized continuous zoom camera lens with large visual field |
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| CN103323935A (en) * | 2013-06-26 | 2013-09-25 | 东莞市宇瞳光学科技有限公司 | Large-zoom camera lens capable of being used in the day and at night |
| CN103913817A (en) * | 2014-03-27 | 2014-07-09 | 徐中一 | Ultra-large-aperture full-width lens for digital single-lens reflex camera |
| CN104199174A (en) * | 2014-09-18 | 2014-12-10 | 福建福光数码科技有限公司 | Day and night confocal high-definition lens with large target area |
| CN104977703A (en) * | 2015-07-14 | 2015-10-14 | 福建福光股份有限公司 | Ultralow-illumination low light zooming lens and control method thereof |
| CN110703422A (en) * | 2019-11-15 | 2020-01-17 | 湖北久之洋红外***股份有限公司 | Ultra-large zoom ratio 50X continuous zooming medium wave infrared optical system |
| CN112649951A (en) * | 2020-12-23 | 2021-04-13 | 福建福光股份有限公司 | Low-distortion wide-angle zoom lens |
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