CN202794681U - High-resolution motor-driven diaphragm pick-up lens - Google Patents

High-resolution motor-driven diaphragm pick-up lens Download PDF

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Publication number
CN202794681U
CN202794681U CN 201220425776 CN201220425776U CN202794681U CN 202794681 U CN202794681 U CN 202794681U CN 201220425776 CN201220425776 CN 201220425776 CN 201220425776 U CN201220425776 U CN 201220425776U CN 202794681 U CN202794681 U CN 202794681U
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CN
China
Prior art keywords
lens
arrangement
pick
motor
mirrors cylinder
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN 201220425776
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Chinese (zh)
Inventor
屈立辉
林平
许端霞
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Fujian Forecam Optics Co Ltd
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Fujian Forecam Optics Co Ltd
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Priority to CN 201220425776 priority Critical patent/CN202794681U/en
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Publication of CN202794681U publication Critical patent/CN202794681U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model relates to a high-resolution motor-driven diaphragm pick-up lens which comprises a front group A with negative focal power, a back group B with positive focal power and a variable diaphragm C located between the front group A and the back group B, wherein incidence directions of the front group A, the back group B and the variable diaphragm C from left to right along light are respectively arranged. The high-resolution motor-driven diaphragm pick-up lens is characterized in that the front group A is formed by a glue group knitted by a negative crescent moon lens A-1, a biconvex lens A-2 and a biconcave lens A-3; and the back group B is composed of a glue group knitted by a biconcave lens B-1 and a biconvex lens B-2, a biconvex lens B-3 and a positive crescent moon lens B-4. The high-resolution motor-driven diaphragm pick-up lens has the advantages of high resolution, big target surface, big relative aperture, motor-driven diaphragm and the like. High-refractive index and low-dispersion optical glass materials are selected during light path design, imaging resolution ratio is as high as 3000000 pixels through computer optical aided design and optimizing, and the pick-up lens can be matched with a high-resolution charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS) camera to achieve high-resolution video pickup.

Description

The electronic smooth hurdle of high resolving power pick-up lens
Technical field
The utility model relates to the electronic smooth hurdle of a kind of high resolving power pick-up lens, belongs to the camera lens field.
Background technology
Pick-up lens such as Fig. 2 structural shape was used more than 10 year in the video camera field; Its performance index are low, and especially it can only be adaptive with SD CCD or the cmos camera of 20~300,000 pixels aspect image definition, can only adapt to the needs that the monitoring field " is seen ".Such resolution has not satisfied the requirement of present high-definition camera far away.
Summary of the invention
Constantly perfect along with 1,000,000 grades of pixel high-resolution CCD, cmos image sensor, the photo electric video frequency monitoring networking is also more and more general; The performance of video camera system by in the past to external world pure " the watching " of scenery to now " identification and cognitive "; The utility model is intended to adapt to above-mentioned development trend, for video camera system provides a kind of optical index high, the optics target surface is large, and resolution is higher than the electronic smooth hurdle of the high resolving power pick-up lens of three mega pixels, can " video camera of high definition supports the use with 16:9 standard 1/2.Camera system can be realized the requirement of scenery at the high definition pick-up of high photokinesis variation range environment.
Of the present utility model being characterised in that: the electronic smooth hurdle of a kind of high resolving power pick-up lens, comprise along light from left to right the focal power that arranges respectively of incident direction it is characterized in that for negative front group of A, focal power are positive rear group of B and at the iris C between front group of A and the rear group of B: described front group of A consists of by bearing the gummed group that crescent moon lens A-1, biconvex lens A-2 and biconcave lens A-3 connect airtight; The gummed group that described rear group of B connected airtight by biconcave lens B-1 and biconvex lens B-2, biconvex lens B-3 and positive crescent moon lens B-4 form; Also comprise installing the front arrangement of mirrors cylinder of front group of A and be connected in front arrangement of mirrors tube rear end and in order to install the rear arrangement of mirrors cylinder of rear group of B, be provided with to install the light hurdle rotating ring of iris in the described rear arrangement of mirrors cylinder front end, the guide pin of rotating ring arrangement of mirrors cylinder front portion after running through, described smooth hurdle be sheathed on after light hurdle adjusting ring gear on the arrangement of mirrors cylinder front end periphery be connected, the rear end one side perimembranous of described front arrangement of mirrors cylinder is provided with motor rack, described motor rack is provided with motor, be connected with axle sleeve on the output shaft of described motor, be arranged with the motor gear in order to be connected with a joggle with light hurdle adjusting ring gear on the described axle sleeve.
Airspace between described front group of A and the rear group of B is: 21.185mm; Airspace between described front group and the iris C is: 10.500mm; Airspace between described rear group of B and iris C is: 10.685mm; Airspace between the gummed group that negative crescent moon lens A-1 and biconvex lens A-2 and biconcave lens A-3 connect airtight among the described front group of A is: 2.350mm; The gummed group that the biconcave lens B-1 of described rear group of B and biconvex lens B-2 connect airtight and the airspace between biconvex lens B-3 are: 0.100mm; Airspace between biconvex lens B-3 and the positive crescent moon lens B-4 is: 0.096mm.
Advantage of the present utility model: in the optical texture of this retrofocus type reasonable distribution the focal power of front group of A and rear group of B, in rear group of B, the first eyeglass of three-chip type structure is changed into the cemented doublet group, make camera lens reach object lens of large relative aperture, wide-angle, the short performance index of structure length;
By the optical glass material of forward and backward two groups seven five groups of reasonable selections, 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, proofreaied and correct the various aberrations of optical lens perfectly, make the mtf value of camera lens make the resolution of camera lens high at 150 lp/mm., can adapt to the requirement of 3,000,000 pixel high definition videos shooting;
The distortion of this system is less, below 12%, because distortion generally can be larger in the short burnt situation, there has been better control in this system with respect to old structural aberration, and the asterism figure of this system is also more satisfactory, all in 3.5 um, energy comparison is concentrated, and has reached high-resolution requirement;
When structural design, both guaranteed camera lens concentricity, precision and axial location accurately, make again the compact conformation of camera lens as far as possible.Consider again the practicality of camera lens, adopted rear end little " focusing " structure, avoided the limit of camera lens to use;
Designed electronic smooth hurdle in the structure, made light hurdle control accuracy higher.Realized that relative aperture is from 1:1.4 to 360(complete shut-down state) accurate control, satisfy the request for utilization of various intensities of illumination; Electronic smooth hurdle can carry out remote monitoring simultaneously, the problem of the position that overcomes limitation.
Description of drawings
Fig. 1 is the utility model embodiment light channel structure synoptic diagram.
Fig. 2 is the light channel structure synoptic diagram of present common pixel camera lens.
Fig. 3 is the total figure of the machinery of the utility model embodiment.
Embodiment
With reference to figure 1, Fig. 2, Fig. 3, the utility model relates to the electronic smooth hurdle of a kind of high resolving power pick-up lens, comprise along light from left to right the focal power that arranges respectively of incident direction be positive rear group of B and at the iris C between front group of A and the rear group of B for negative front group of A, focal power, described front group of A consists of by bearing the gummed group that crescent moon lens A-1, biconvex lens A-2 and biconcave lens A-3 connect airtight; The gummed group that described rear group of B connected airtight by biconcave lens B-1 and biconvex lens B-2, biconvex lens B-3 and positive crescent moon lens B-4 form.
Airspace between above-mentioned front group of A and the rear group of B is: 21.185mm; Airspace between described front group and the iris C is: 10.500mm; Airspace between described rear group of B and iris C is: 10.685mm; Airspace between the gummed group that negative crescent moon lens A-1 and biconvex lens A-2 and biconcave lens A-3 connect airtight among the described front group of A is: 2.350mm; The gummed group that the biconcave lens B-1 of described rear group of B and biconvex lens B-2 connect airtight and the airspace between biconvex lens B-3 are: 0.100mm; Airspace between biconvex lens B-3 and the positive crescent moon lens B-4 is: 0.096mm.
Camera lens of the present utility model also comprises installing the front arrangement of mirrors cylinder 1 of front group of A and is connected in front arrangement of mirrors cylinder 1 rear end and in order to install the rear arrangement of mirrors cylinder 2 of rear group of B, be provided with to install the light hurdle rotating ring 3 of iris in described rear arrangement of mirrors cylinder 2 front ends, the guide pin 4 of described smooth hurdle rotating ring 3 arrangement of mirrors cylinder front portion after running through be sheathed on after light hurdle adjusting ring gear 5 on the arrangement of mirrors cylinder 2 front end peripheries be connected, the rear end one side perimembranous of described front arrangement of mirrors cylinder 1 is provided with motor rack 6, described motor rack 6 is provided with motor 7, be connected with axle sleeve 8 on the output shaft of described motor 7, be arranged with the motor gear 9 in order to be connected with a joggle with light hurdle adjusting ring gear 5 on the described axle sleeve 8.
Focusing mount 10 has been threaded on the rear end peripheral part of above-mentioned rear arrangement of mirrors cylinder 2, be connected with focusing ring 12 through countersunk head jackscrew 11 on the front end peripheral part of described focusing mount 10, be threaded on the rear end peripheral part of described focusing mount 10 Connection Block 13 between focusing mount 10 and focusing ring 12 also is provided with on the rear end of described rear arrangement of mirrors cylinder 2 with so that the circumferential movement of rear arrangement of mirrors cylinder 2 transfers the focusing guide pin 14 of axially-movable to.
The front inner wall of above-mentioned front arrangement of mirrors cylinder 1 is provided with to guarantee the front trim ring 15 of front group of A Assembly stability.
Be provided with EF spacer ring 16 between the gummed group that the biconcave lens B-1 of above-mentioned rear group of B and biconvex lens B-2 connect airtight and biconvex lens B-3, be provided with FG spacer ring 17 between described biconvex lens B-3 and the positive crescent moon lens B-4, the rear end inwall of described rear arrangement of mirrors cylinder is provided with to guarantee the rear trim ring 18 of rear group of B Assembly stability.
The technical indicator that the utility model is realized is as follows:
1. focal length: f '=8mm
2. relative aperture D/f '=1/1.4
3. field angle 2 ω: 58.4 °
4. resolution: be better than 3,000,000 pixels
5. light path overall length ∑ L≤60mm
6. be suitable for spectral line scope: 400nm~700nm
Specific implementation process is as follows:
1, light path design scheme:
3,000,000 high resolving power tight shots, its light path consists of as shown in Figure 1, along light from left to right incident direction focal power is set respectively is positive rear group of B and iris C for negative front group of A, focal power.
Described front group of A is made of the gummed group that negative crescent moon lens A-1, biconvex lens A-2 and biconcave lens A-3 connect airtight; The gummed group that described rear group of B connected airtight by biconcave lens B-1, biconvex lens B-2, biconvex lens B-3 and positive crescent moon lens B-4 form.
Airspace between described front group of A and the rear group of B is: 21.185mm; Airspace between described front group and the iris C is: 10.500mm; Airspace between described rear group and iris C is: 10.685mm; Airspace between the gummed group that negative crescent moon lens A-1 and biconvex lens A-2 and biconcave lens A-3 connect airtight in described front group is: 2.350mm; Airspace between described rear group of gummed mirror group and biconvex lens B-3 is: 0.100mm; Airspace between biconvex lens B-3 and the positive crescent moon lens B-4 is: 0.096mm.
2, Design of Mechanical Structure scheme:
The resolution of this kind of camera lens is 3,000,000 pixels, and the resolution of this type of lens edge visual field and central market will be consistent as far as possible, and this just requires will to guarantee in the structural design the accurate, steady etc. of the actions such as the concentricity of each constituent element of system and focusing.
The utility model Design of Mechanical Structure mainly comprises as shown in Figure 3: arrangement of mirrors cylinder and front trim ring before the design, front arrangement of mirrors cylinder 5 is equipped with front group of three eyeglasses (A-1 sheet), (A-2 sheet), (A-3).Can effectively be guaranteed the concentricity of front group of light path by the front arrangement of mirrors cylinder of same machine tooling.Owing to directly pressed by eyeglass between A, the B sheet and guarantee its logical light and air distance, so do not need to design spacer ring.Trim ring before the design, the Assembly stability of arrangement of mirrors sheet before guaranteeing, and interception parasitic light are eliminated it to the impact of lens imaging quality.
Four eyeglasses (B-1 sheet), (B-2 sheet), (B-3 sheet), (the B-4 sheet) of group after the arrangement of mirrors cylinder is placed after the design.In order to guarantee the airspace between each eyeglass, EF spacer ring and FG spacer ring have been designed therebetween; Trim ring guarantees rear arrangement of mirrors sheet assembling stability after the design, prevents that eyeglass is loosening or drops out.
For realizing the function of electronic aperture, at first designed light hurdle rotating ring, light hurdle sheet is fixed therein, and connects light hurdle rotating ring and light hurdle adjusting ring gear with guide pin, control the size of light hurdle opening by the groove of in main cylinder, opening certain angle; And on light hurdle adjusting ring gear, done the dentalation that matches with motor gear, and with the pad that skids, spring and nut gear has been fixed on the motor shaft sleeve, with jackscrew axle sleeve has been fixed on the motor; Motor is fixed on the motor rack, and motor rack is fixed on the front arrangement of mirrors cylinder.Rotate by motor driven gear, thereby interlock light hurdle adjusting ring gear changes light hurdle pore size, to satisfy the environment for use under the different illumination conditions.Owing to by driven by motor, also the power lead of motor can be extracted, control the pore size on light hurdle by direction, the angle of far distance controlled electric machine rotation, realized the remote monitoring effect of aperture.
Adjustable in order to realize that camera lens closely arrives ∞, in design, also added focus adjusting mechanism, adopt the bull pitch thread to pay left-handed fine thread interworking and close transmission, have focus quick, flexible, the little advantage of backlash;
Focusing mount links to each other with focusing ring with rear arrangement of mirrors cylinder with positive and negative tooth respectively, and guide pin plays and changes the direction of motion effect; The rotation focusing ring, focusing ring and focusing mount move Connection Block by positive and negative tooth, and guide pin makes the focusing mount circumferential movement become rectilinear motion along axis.Thereby realize that the whole relatively Connection Block of camera lens moves forward and backward.The focusing retaining screw guarantees that focusing range is at ± 1mm.Mix up that rear to mark closely a focusing ring with focusing lock locked, guaranteeing that video camera connects end face and do not produce displacement, thus the out of focus of avoiding.In the assembling of focus adjusting mechanism, by grinding, the precision that cooperates between the assurance screw thread improves the precision of focusing, thereby guarantees the concentricity of camera lens in the focusing process.
Because the resolution of this camera lens is very high, and the resolution of visual field, edge and central market do not allow very large difference, thus in structural design mainly be the actions such as the concentricity of each constituent element of assurance system and focusing accurately, steady and good hand touch.
The above only is preferred embodiment of the present utility model, and all equalizations of doing according to the utility model claim change and modify, and all should belong to covering scope of the present utility model.

Claims (5)

1. the electronic smooth hurdle of high resolving power pick-up lens, comprise along light from left to right the focal power that arranges respectively of incident direction it is characterized in that for negative front group of A, focal power are positive rear group of B and at the iris C between front group of A and the rear group of B: described front group of A consists of by bearing the gummed group that crescent moon lens A-1, biconvex lens A-2 and biconcave lens A-3 connect airtight; The gummed group that described rear group of B connected airtight by biconcave lens B-1 and biconvex lens B-2, biconvex lens B-3 and positive crescent moon lens B-4 form; Also comprise installing the front arrangement of mirrors cylinder of front group of A and be connected in front arrangement of mirrors tube rear end and in order to install the rear arrangement of mirrors cylinder of rear group of B, be provided with to install the light hurdle rotating ring of iris in the described rear arrangement of mirrors cylinder front end, the guide pin of rotating ring arrangement of mirrors cylinder front portion after running through, described smooth hurdle be sheathed on after light hurdle adjusting ring gear on the arrangement of mirrors cylinder front end periphery be connected, the rear end one side perimembranous of described front arrangement of mirrors cylinder is provided with motor rack, described motor rack is provided with motor, be connected with axle sleeve on the output shaft of described motor, be arranged with the motor gear in order to be connected with a joggle with light hurdle adjusting ring gear on the described axle sleeve.
2. the electronic smooth hurdle of high resolving power according to claim 1 pick-up lens is characterized in that: the airspace between described front group of A and the rear group of B is: 21.185mm; Airspace between described front group and the iris C is: 10.500mm; Airspace between described rear group of B and iris C is: 10.685mm; Airspace between the gummed group that negative crescent moon lens A-1 and biconvex lens A-2 and biconcave lens A-3 connect airtight among the described front group of A is: 2.350mm; The gummed group that the biconcave lens B-1 of described rear group of B and biconvex lens B-2 connect airtight and the airspace between biconvex lens B-3 are: 0.100mm; Airspace between biconvex lens B-3 and the positive crescent moon lens B-4 is: 0.096mm.
3. the electronic smooth hurdle of high resolving power according to claim 2 pick-up lens, it is characterized in that: focusing mount has been threaded on the rear end peripheral part of described rear arrangement of mirrors cylinder, be connected with focusing ring through the countersunk head jackscrew on the front end peripheral part of described focusing mount, be threaded on the rear end peripheral part of described focusing mount Connection Block between focusing mount and focusing ring also is provided with on the rear end of described rear arrangement of mirrors cylinder with so that the circumferential movement of rear arrangement of mirrors cylinder transfers the focusing guide pin of axially-movable to.
4. the electronic smooth hurdle of high resolving power according to claim 3 pick-up lens, it is characterized in that: the front inner wall of described front arrangement of mirrors cylinder is provided with to guarantee the front trim ring of front group of A Assembly stability.
5. the electronic smooth hurdle of high resolving power according to claim 4 pick-up lens, it is characterized in that: be provided with the EF spacer ring between the gummed group that the biconcave lens B-1 of described rear group of B and biconvex lens B-2 connect airtight and biconvex lens B-3, be provided with the FG spacer ring between described biconvex lens B-3 and the positive crescent moon lens B-4, the rear end inwall of described rear arrangement of mirrors cylinder is provided with to guarantee the rear trim ring of rear group of B Assembly stability.
CN 201220425776 2012-08-27 2012-08-27 High-resolution motor-driven diaphragm pick-up lens Expired - Fee Related CN202794681U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201220425776 CN202794681U (en) 2012-08-27 2012-08-27 High-resolution motor-driven diaphragm pick-up lens

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Application Number Priority Date Filing Date Title
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102819096A (en) * 2012-08-27 2012-12-12 福建福光数码科技有限公司 High-resolution electric diaphragm pick-up lens
CN106772962A (en) * 2016-12-28 2017-05-31 中国科学院长春光学精密机械与物理研究所 A kind of active optics Hartmann focusing lens

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102819096A (en) * 2012-08-27 2012-12-12 福建福光数码科技有限公司 High-resolution electric diaphragm pick-up lens
CN102819096B (en) * 2012-08-27 2014-10-08 福建福光数码科技有限公司 High-resolution electric diaphragm pick-up lens
CN106772962A (en) * 2016-12-28 2017-05-31 中国科学院长春光学精密机械与物理研究所 A kind of active optics Hartmann focusing lens

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C14 Grant of patent or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20130313

Termination date: 20150827

EXPY Termination of patent right or utility model