CN207020388U - Electromotion focusing formula uncooled ir is dolly-out,ed dolly-back type camera lens - Google Patents
Electromotion focusing formula uncooled ir is dolly-out,ed dolly-back type camera lens Download PDFInfo
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- CN207020388U CN207020388U CN201720511339.7U CN201720511339U CN207020388U CN 207020388 U CN207020388 U CN 207020388U CN 201720511339 U CN201720511339 U CN 201720511339U CN 207020388 U CN207020388 U CN 207020388U
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Abstract
A kind of electromotion focusing formula uncooled ir is the utility model is related to dolly-out, dolly-back type camera lens,Including lens barrel,Preceding group of A,After organize B,Preceding group of A eyeglass is positive light coke,It is positive light coke to organize B eyeglasses afterwards,Lens barrel includes preceding main cylinder,Cylinder afterwards,Before preceding group of A is located in main cylinder,Preceding trim ring is provided with preceding main cylinder,Group B is located in rear cylinder afterwards,The rear trim ring that B is organized after being used to fix is provided with cylinder afterwards,Rear jacket casing is located at interior by preceding main tube rear end,Afterwards cylinder can relatively preceding main cylinder move forward and backward,Preceding main tube rear end outer cover is provided with turning set,Turning set peripheral ring is provided with bulge loop,Bulge loop periphery is evenly equipped with teeth groove,Cylinder periphery is provided with cam rail afterwards,Bulge loop rear vertical is provided with cam guide pin,Cam guide pin lower end sequentially passes through turning set,Stretched into after preceding main cylinder in cam rail,Preceding main cylinder is provided with focusing motor,The utility model realizes imaging performance of the air away from change adjustment optical system between eyeglass in the case of different temperatures.
Description
Technical field
A kind of electromotion focusing formula uncooled ir is the utility model is related to dolly-out, dolly-back type camera lens.
Background technology
With the fast development of science and technology, the continuous development of uncooled detector technology and increasingly mature, LONG WAVE INFRARED
Non-brake method optical system has obtained wide hair application in military and civilian field.Because infrared optical material and mechanical material are in temperature
Can produce thermal deformation during degree change, thus the acute variation of operating temperature can cause the focal length variations of optical system, image planes it is elegant,
Image quality decline etc. influences.In order to eliminate or reduce influence of the temperature change to optical system imaging, it is necessary to using corresponding
Compensation technique, make optical system keep focal length constant in a larger temperature range, it is ensured that image quality it is good.
The content of the invention
In view of the deficiencies in the prior art, it is non-that technical problem to be solved in the utility model is to provide a kind of electromotion focusing formula
Freeze infrared type camera lens of dolly-out,ing dolly-back.
In order to solve the above-mentioned technical problem, the technical solution of the utility model is：A kind of electromotion focusing formula uncooled ir
Type of dolly-out,ing dolly-back camera lens, including lens barrel, the optical system that is arranged in lens barrel, the optical system include incident from left to right along light
Preceding group of A that direction is set gradually, B is organized afterwards, preceding group of A eyeglass is positive light coke, and rear B eyeglasses of organizing be positive light coke, and organizing A before described is
Crescent lens A, the rear airspace for organizing B between crescent lens B, preceding group of A and rear group B is 43.94 ~ 45.94mm, described
Lens barrel includes preceding main cylinder, rear cylinder, and before preceding group of A is arranged in main cylinder, the preceding trim ring for organizing A before fixation is provided with preceding main cylinder,
Group B is arranged in rear cylinder afterwards, and the rear trim ring that B is organized after being used to fix is provided with rear cylinder, and rear jacket casing is located at by the preceding main tube rear end
It is interior, rear cylinder can relatively preceding main cylinder move forward and backward, the preceding main tube rear end outer cover is provided with turning set, and turning set peripheral ring is provided with convex
Ring, bulge loop periphery are evenly equipped with teeth groove, and rear cylinder periphery is provided with cam rail, and bulge loop rear vertical is provided with cam guide pin, cam
Guide pin lower end is stretched into cam rail after sequentially passing through turning set, preceding main cylinder, and focusing motor is provided with the preceding main cylinder, focusing
The adjustment gear with teeth groove engaged transmission is provided with the output shaft of motor.
Further, the focusing motor side is provided with potentiometer, and potentiometer is arranged on preceding main cylinder, the axle of potentiometer
Portion is provided with focuses gear with teeth groove engaged transmission.
Further, extreme position contact switch A, extreme position contact switch B, contact switch are provided with the lens barrel
A, positioning screw is provided between contact switch B, positioning screw is arranged on turning set.
Further, the rear tube rear end is provided with switching circle, and switching circle is screwed on rear cylinder.
Compared with prior art, the utility model has the advantages that：Structure design is simple, compact, reasonable, passes through
The cooperation of motor and potentiometer, realize air between eyeglass in the case of different temperatures away from change adjustment optical system into
As optical imagery performance also significantly improves under performance and different object distances.
The utility model is described in more detail with reference to the accompanying drawings and detailed description.
Brief description of the drawings
Fig. 1 is the structural representation of the utility model optical system；
Fig. 2 is the utility model unitary construction schematic diagram；
Fig. 3 is Fig. 2 right view.
In figure：
A is organized before A-；B is organized after B-；C- image planes；Main cylinder before 1-；2- group of motors；3- cam guide pins；4- turning sets；5- transfers
Circle；Trim ring before 6-；Cylinder after 7-；Trim ring after 8-；9- potentiometers；10- contact switch A；11- positioning screws；12- contact switch B.
Embodiment
For features described above and advantage of the present utility model can be become apparent, special embodiment below, and coordinate accompanying drawing,
It is described in detail below.
As shown in Figure 1 and 2, a kind of electromotion focusing formula uncooled ir is dolly-out,ed dolly-back type camera lens, including lens barrel, is arranged in lens barrel
Optical system, the optical system include along the light preceding group of A that incident direction is set gradually from left to right, organize B, preceding group of A afterwards
Eyeglass is positive light coke, and rear B eyeglasses of organizing are positive light coke, and it is crescent lens A to organize A before described, and the rear B that organizes is crescent lens B,
Airspace between preceding group of A and rear group B is 43.94 ~ 45.94mm, and the lens barrel includes preceding main cylinder, rear cylinder, and preceding group of A is arranged on
In preceding main cylinder, the preceding trim ring for organizing A before fixation is provided with preceding main cylinder, the rear B that organizes is arranged in rear cylinder, is provided with and is used in rear cylinder
B rear trim ring is organized after fixation, in rear jacket casing is located at by the preceding main tube rear end, rear cylinder can relatively preceding main cylinder move forward and backward, it is described
Preceding main tube rear end outer cover is provided with turning set, and turning set peripheral ring is provided with bulge loop, and bulge loop periphery is evenly equipped with teeth groove, and rear cylinder periphery is set
Cam rail is equipped with, bulge loop rear vertical is provided with cam guide pin, and cam guide pin lower end is stretched after sequentially passing through turning set, preceding main cylinder
Enter in cam rail, be provided with focusing motor on the preceding main cylinder, be provided with the output shaft for motor of focusing and biography is engaged with teeth groove
Dynamic adjustment gear.
In the present embodiment, in order to prevent focusing terminates rear bulge loop from rotating without reason, the focusing motor side is provided with electricity
Position device, is positioned for focal length, potentiometer is arranged on preceding main cylinder, and the axle portion of potentiometer is provided with to be focused with teeth groove engaged transmission
Gear.
In the present embodiment, extreme position contact switch A, extreme position contact switch B, contact are provided with the lens barrel
Positioning screw is provided between switch A, contact switch B, positioning screw is arranged on turning set, when bulge loop turns to two limit
, it is necessary to touch contact switch by positioning screw to leave the motor off work during position.
In the present embodiment, the rear tube rear end is provided with switching circle, and switching circle is screwed on rear cylinder, described
The ridge and video camera that M34X0.75-6g is devised on switching circle coordinate.
In use, driving turning set to rotate by the adjustment gear on motor of focusing, cam guide pin is fixed on rear group of lens barrel
Upper guide pin simultaneously slides along cam rail, and cylinder is movable after guide pin drives realizes focusing.
In the present embodiment, the effect of potentiometer is while voltage and current is adjusted, and exports a kind of pulse electrical signal,
When reaching precalculated position, by adjusting voltage（Power-off changes voltage swing）So that potentiometer obtains electric signal, so that
The pinion rotation focused on gear change outputting torsion cooperation motor on potentiometer, plays a part of positioning（Such as work as motor
Potentiometer receives electric signal during power-off, and increasing torsion in time makes motor stop immediately to be held in a predetermined position）.
In the present embodiment, the optical system being made up of above-mentioned lens set has reached following optical index：
1) focal length：f′=50mm；
2) relative aperture F：1.0；
3) angle of visual field：2w≥16°；
4) resolution ratio：It can be adapted to 640 × 512 17 μm of detector video cameras；
5) total length of light path ∑≤68.49mm, optics rear cut-off distance l ' >=11.53mm；
6) it is applicable spectral line scope：8μm~12μm；
Each lens parameters are as follows
Aspheric mask body face type equation is as follows：
Z=cr^2/(1+√[1-(1+k)c^2r^2)]+A0r^2+A1r^4+A2r^6+A3r^8+A4r^10
Wherein：
C=1/R in S2, R=59.233, k=0, A0=0, A1=8.349E-008, A2=4.285E-011, A3=- 2.035E-
014；
C=1/R in S3, R=25.235, k=0, A0=0, A1=- 7.565E-008, A2=1.617E-009, A3=- 6.345E-
011, A4=1.247E-013。
In optical design, aberration correction and balance are carried out to 8~12 μm of wide spectral ranges, make camera lens in wide spectrum model
Enclosing all has excellent picture matter, realizes that wide spectrum is confocal, and such camera lens can blur-free imaging in middle long wave limit；Rolled over from height
Penetrate, the optical glass material of low dispersion, by designing and optimizing, correct the various aberrations of optical lens, realize camera lens high
The advantages that resolution ratio, object lens of large relative aperture, low distortion；Distortion is smaller, below 1%, has preferably relative to old structural aberration
Control；In structure design, the accurate of the concentricity of camera lens, precision and axial location was both ensured, and had made the structure of camera lens as far as possible again
It is compact, attractive in appearance；By the cooperation of group of motors and potentiometer group, the air between eyeglass in the case of different temperatures is realized away from change
Change optical imagery performance under the imaging performance for adjusting optical system and different object distances also to significantly improve.
The utility model is not limited to above-mentioned preferred forms, and anyone can obtain under enlightenment of the present utility model
Go out other various forms of electromotion focusing formula uncooled irs to dolly-out, dolly-back type camera lens.It is all to be done according to present utility model application the scope of the claims
Equivalent changes and modifications, should all belong to covering scope of the present utility model.
Claims (4)
- The type camera lens 1. a kind of electromotion focusing formula uncooled ir is dolly-out,ed dolly-back, it is characterised in that：Including lens barrel, the light being arranged in lens barrel System, the optical system include along the light preceding group of A that incident direction is set gradually from left to right, organize B, preceding group of A eyeglass afterwards For positive light coke, rear group B eyeglasses are positive light coke, and it is crescent lens A to organize A before described, and the rear B that organizes is crescent lens B, preceding group Airspace between A and rear group B is 43.94 ~ 45.94mm, and the lens barrel includes preceding main cylinder, rear cylinder, and preceding group of A is arranged on preceding master In cylinder, the preceding trim ring for organizing A before fixation is provided with preceding main cylinder, the rear B that organizes is arranged in rear cylinder, is provided with rear cylinder and is used to fix Organize B rear trim ring afterwards, in rear jacket casing is located at by the preceding main tube rear end, rear cylinder can relatively preceding main cylinder move forward and backward, it is main before described Tube rear end outer cover is provided with turning set, and turning set peripheral ring is provided with bulge loop, and bulge loop periphery is evenly equipped with teeth groove, and rear cylinder periphery is provided with Cam rail, bulge loop rear vertical are provided with cam guide pin, cam guide pin lower end sequentially pass through stretch into after turning set, preceding main cylinder it is convex Take turns in guide groove, be provided with focusing motor on the preceding main cylinder, be provided with the output shaft for motor of focusing and teeth groove engaged transmission Adjustment gear.
- The type camera lens 2. electromotion focusing formula uncooled ir according to claim 1 is dolly-out,ed dolly-back, it is characterised in that：The focusing electricity Machine side is provided with potentiometer, and potentiometer is arranged on preceding main cylinder, and the axle portion of potentiometer is provided with determines with teeth groove engaged transmission Burnt gear.
- The type camera lens 3. electromotion focusing formula uncooled ir according to claim 2 is dolly-out,ed dolly-back, it is characterised in that：On the lens barrel Extreme position contact switch A, extreme position contact switch B are provided with, positioning spiral shell is provided between contact switch A, contact switch B Nail, positioning screw are arranged on turning set.
- The type camera lens 4. electromotion focusing formula uncooled ir according to claim 3 is dolly-out,ed dolly-back, it is characterised in that：After described after cylinder End is provided with switching circle, and switching circle is screwed on rear cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720511339.7U CN207020388U (en) | 2017-05-10 | 2017-05-10 | Electromotion focusing formula uncooled ir is dolly-out,ed dolly-back type camera lens |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720511339.7U CN207020388U (en) | 2017-05-10 | 2017-05-10 | Electromotion focusing formula uncooled ir is dolly-out,ed dolly-back type camera lens |
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| CN207020388U true CN207020388U (en) | 2018-02-16 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106990513A (en) * | 2017-05-10 | 2017-07-28 | 福建福光天瞳光学有限公司 | Electromotion focusing formula uncooled ir is dolly-out,ed dolly-back type camera lens and its method of work |
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2017
- 2017-05-10 CN CN201720511339.7U patent/CN207020388U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106990513A (en) * | 2017-05-10 | 2017-07-28 | 福建福光天瞳光学有限公司 | Electromotion focusing formula uncooled ir is dolly-out,ed dolly-back type camera lens and its method of work |
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