CN205246959U - Panorama clitellum imaging lens based on IR -CUT technique - Google Patents
Panorama clitellum imaging lens based on IR -CUT technique Download PDFInfo
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- CN205246959U CN205246959U CN201521076033.0U CN201521076033U CN205246959U CN 205246959 U CN205246959 U CN 205246959U CN 201521076033 U CN201521076033 U CN 201521076033U CN 205246959 U CN205246959 U CN 205246959U
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Abstract
The utility model provides a panorama clitellum imaging lens based on IR -CUT technique, accessory things have inclined and have included in proper order along the optical axis direction: coaxial arrangement's primary mirror group, corrector group, IR -CUT switch and CCD detector, wherein, primary mirror group is used for collecting light, confirms the visual field size, corrector group is used for carrying on the correction and the miscellaneous astigmatic elimination of aberration, colour difference to the light from the primary mirror logging in of group, the IR -CUT switch is used for according to the light power of the environment that the camera lens is located and the light filter before the automatic switch -over CCD detector, the CCD detector is used for gathering the entering imaging lens's light signal. The utility model discloses a structure not only can revise the colour cast, lose burnt scheduling problem for the formation of image when ambient light intensity around daytime is strong of panorama clitellum camera lens to when ambient light intensity was more weak the night around, light, the suppression that can make CCD make full use of the gather formation a little of making an uproar reached the best visual effect.
Description
Technical field
The utility model relates to optical imaging device field, relates in particular to a kind of overall view ring belt imaging lens based on IR-CUT technologyHead.
Background technology
360 degree overall view ring belt imaging lens are a kind of emerging imaging lens, and its feature is: angle of visual field super large, and simple in structure,Cheap for manufacturing cost, with respect to traditional pick-up lens, panoramic imaging lens has irreplaceable advantage. Conventionally, as Fig. 1Shown in, overall view ring belt imaging lens is mainly made up of 3 parts, is respectively primary mirror group 1, correcting lens group 2 and ccd sensor 3.And one of defect of current this camera lens is: while easily causing the distortion of color and night imaging when daytime imaging to light powerControl deficiency, cause the contrast of image low. The generation of this defect is, due to ccd sensor and human eye, light is differentiated to energyThe difference of power causes.
Occurring in nature exists the light of various wavelength, the identification range of the wavelength of human eye to light about 320nm-760nm itBetween, and the light response to most wavelength of general ccd detector or COMS detector, if therefore not to detectorThe processing responding, due to the interference of the light outside visible light wave range, arrives color and eye-observation that detector restoresColor there are many deviations, cause the distortion of color. Conventionally before ccd detector, adding a low pass filter can be effectiveGround solves color distortion, has but brought another problem, is exactly while surveying night, due to the existence of low pass filter, makesObtain CCD and can not make full use of light, cause the picture of imaging to there is obvious noise and lower contrast.
IR-CUT is a kind of two optical-filter switcher, is placed in before ccd detector, and by two tablet filters, (a slice is infrared section conventionallyOnly/absorption filter, another sheet is full impregnated spectral filter) and power section (can be electromagnetism, motor or other power sources)Form. By the pinhole detector outside camera lens, the response of ambient light power is determined to use low pass or full impregnated optical filter. Daytime, whenWhen light intensity is around stronger, IR-CUT is switched to cutoff filter, only allows the visible light wave range below 760nm to pass through,With correction colour cast, the problem such as out of focus; At night, in the time that light intensity is around weak, IR-CUT is switched to full impregnated spectral filter,Make CCD make full use of gathered light, suppress the generation of noise, reach best visual effect.
Thus, inventor's process of the present utility model research, has expected on the basis of existing overall view ring belt imaging lens, based onIR-CUT technology and the panoramic imaging lens that a kind of imaging on daytime color is undistorted, nighttime imaging contrast is high is provided.
Utility model content
In view of the existence of above-mentioned defect, the utility model proposes a kind of overall view ring belt imaging lens based on IR-CUT technology, itsFor the evolutionary approach to current overall view ring belt imaging lens, to solve color distortion and the nighttime imaging of the imaging on daytime of this imaging lensThe problem of contrast deficiency.
Overall view ring belt imaging lens based on IR-CUT technology of the present utility model comprises successively along optical axis direction from thing side:Coaxial mounted primary mirror group, corrective lens (eye protection) group, IR-CUT switch and ccd detector, wherein, described primary mirror group is for collectingLight, determines visual field size; Described corrective lens (eye protection) group is for carrying out the correction of aberration, aberration to the light that enters system from primary mirror groupAnd the elimination of veiling glare; Described IR-CUT switch is used for according to the light power of camera lens environment of living in and automatic switchover CCD detectionOptical filter before device; Described ccd detector is for gathering the optical signal that enters described imaging lens.
Preferably, described overall view ring belt imaging lens is two reflective overall view ring belt imaging lens.
Preferably, described primary mirror group is made up of the first speculum and the second speculum, and the central authorities of described the second speculum have circular hole,Described the first speculum and described the second speculum are all taking optical axis as rotation axes of symmetry.
Preferably, described the first speculum is concave mirror or convex reflecting mirror; Described the second speculum is the circular endless belt of indentMinute surface; The surface of described the first speculum and the second speculum has high optical efficiency reflective film.
Preferably, when described primary mirror group gathers light, described the second speculum for light reflection that object in visual field is sent extremelyDescribed the first speculum; Described the first speculum is for reflecting from the light of described the second speculum and pass described theThe circular hole of two-mirror, imaging on system focal plane after described correcting lens group is proofreaied and correct.
Preferably, described IR-CUT switch is placed between described corrective lens (eye protection) group and described ccd detector, and with respect to describedThe more close described ccd detector of corrective lens (eye protection) group.
Preferably, described IR-CUT switch is made up of two tablet filters and power section, two tablet filters of described IR-CUTIn a slice be 760nm or 780nm cutoff filter, another sheet is full impregnated spectral filter.
Preferably, the power section of described IR-CUT switch is motor, drives the switching that realizes two tablet filters by motor.
Preferably, after described ccd detector is placed in described IR-CUT switch, in what formed by primary mirror group and corrective lens (eye protection) groupThe position of focal plane of optical system.
By said structure of the present utility model, it not only can be imaging when surrounding environment light intensity is stronger by day of overall view ring belt camera lensCorrection colour cast, the problem such as out of focus, and in the time that night, surrounding environment light intensity was weak, can make CCD make full use of gathered light,Suppress the generation of noise, reach best visual effect. It is white that structure of the present utility model has made up existing 360 degree overall view ring belt camera lensesIt imaging cross-color, night image contrast deficiency defect.
Brief description of the drawings
Fig. 1 is the cross-sectional view of existing 360 degree overall view ring belt imaging lens.
Fig. 2 is the schematic diagram of IR-CUT switch in overall view ring belt imaging lens of the present utility model.
Fig. 3 is the exploded view of the overall view ring belt imaging lens of a kind of detailed description of the invention of the present utility model.
Detailed description of the invention
Below, in connection with drawings and Examples, the utility model is elaborated. Following examples are not new to this practicalityThe restriction of type. Do not deviating under the spirit and scope of utility model design the variation that those skilled in the art can expect and advantageAll be included in the utility model.
Fig. 2 is the schematic diagram of IR-CUT switch in overall view ring belt camera lens of the present utility model. As shown in Figure 2, IR-CUT cutsParallel operation comprises power section 41 and two tablet filters 42, and this power section 41 is drive motors. Two tablet filters 42 are respectively:760nm or 780nm cutoff filter and full impregnated spectral filter. In the present embodiment, IR-CUT switch 4 is by motorDriving realizes the switching of two tablet filters.
As shown in Figure 3, the overall view ring belt imaging lens of a kind of detailed description of the invention of the present utility model, with optical axis (optical systemSymmetry axis) be rotation axes of symmetry, from thing side, be followed successively by: the first mirror head outer shell 11, primary mirror group the first speculum 21, primary mirrorOrganize the second speculum 22, the second mirror head outer shells 12, corrective lens (eye protection) group 31, IR-CUT switch 4, ccd detector 5, the three mirrorsShell 13. Wherein, the reflection of the reflecting surface of described primary mirror group the first speculum 21 and described primary mirror group the second speculum 22Face is put relatively.
The design of described mirror head outer shell 11 need meet following requirement: 1, protect described primary mirror group; 2, with described mirror head outer shell 12Be connected, form the machinery mount that supports internal optics system; 3; Can be used in fixing described primary mirror group the first speculum 21,And regulate and control the spacing between described primary mirror group the first speculum 21 and described primary mirror group the second speculum 22. In the present embodiment,Mirror head outer shell 11 is hemispherical glass spherical shell, and spherical shell inside top has circular recessed grain, in gummed mode by described primary mirror groupOne speculum 21 is fixed in this circular groove.
The design of described primary mirror group the first speculum 21 need meet following requirement, and in the present embodiment, described primary mirror group first reflectsMirror 21 is circular concave mirror, and surface is coated with highly reflecting films, can be to the incident from described primary mirror group the second speculum 22Light reflects, and makes reverberation pass the aperture of described primary mirror group the second speculum 22 central authorities, thereby in optical system focal plane isDescribed ccd detector 5 planar carries out imaging. The aberration optimization curvature function of described primary mirror group the first speculum 21 canBy computer numerical iteration, or optical design software Zemax simulation is calculated. Fixing described the first speculum 21 and instituteState the distance between the second speculum 22, by changing the radius of curvature value of described the first speculum 21, calculate corresponding aberrationValue, can be in the hope of producing the optimization radius of curvature function of aberration minimum.
The design of described primary mirror group the second speculum 22 need meet following requirement, and in the present embodiment, described primary mirror group second reflectsThe central authorities of mirror 22 have a logical light aperture, make the light in field range can be whole through described primary mirror group the second speculum 22Reflex on described primary mirror group the first speculum 21 design of its curvature mirror function of radius and described primary mirror group the first speculum21 radius of curvature method for designing is similar, can be selected voluntarily by designer.
The design of the second mirror head outer shell 12 need meet following requirement: 1, protect described primary mirror group; 2, with described mirror head outer shell 11Be connected, form the machinery mount that supports internal optics system; 3; Can be used in fixing described primary mirror group the second speculum 22,And regulate and control the spacing between described primary mirror group the first speculum 21 and described primary mirror group the second speculum 22; 4, described mirror head outer shell12 central authorities need leave aperture, and making can be through outside camera lens through the light of the aperture of described primary mirror group the second speculum 22 central authoritiesShell 12 enters corrective lens (eye protection) group 3. In the present embodiment, mirror head outer shell 12 is disc-shaped structure, and central authorities have and described primary mirrorCentral aperture corresponding to logical light aperture of organizing the second speculum 22, the radius of aperture is greater than described primary mirror group the second speculum 22On the radius of central aperture. The two sides, front and back of described mirror head outer shell 12 all has thread groove, for described mirror head outer shell11 are connected with mirror head outer shell 13. Between described mirror head outer shell 12 and described primary mirror group the second speculum 22 with gummed mode phaseConnect.
The design of corrective lens (eye protection) group 31 need meet following requirement, the light that can reflect primary mirror group the first speculum 21 carry out aberration,The correction of aberration, makes light focusing on focal plane. In the present embodiment, corrective lens (eye protection) group 31 is made up of some round lens, putsIn the second mirror head outer shell 12 rears, and about optical axis Rotational Symmetry. The material of corrective lens (eye protection) group 31 can be common optical glass andIts combination, can be required according to aberration by designer and initial configuration is freely selected.
The design of IR-CUT switch 4 need meet following requirement, be placed in described corrective lens (eye protection) group 31 and described ccd detector 5 itBetween, and the more close described ccd detector 5 of relative correction mirror group 31. The more close ccd detector 5 of this IR-CUT switch 4Effect be to guarantee that the light that enters ccd detector all passes through IR-CUT.
The design of ccd detector 5 need meet following requirement, after being positioned at described IR-CUT switch, in whole optical systemFocal plane on.
The design of three-lens shell 13 need meet following requirement: 1, and protection corrective lens (eye protection) group 31, IR-CUT switch 4 and CCDDetector 5; 2, be connected with the second mirror head outer shell 12, form the machinery mount that supports internal optics system. Outside three-lensShell 13 is conical.
Be only preferred embodiment of the present utility model in sum, be not used for limiting practical range of the present utility model. Be all complying withThe equivalence that the content of the utility model claim is done changes and modifies, and all should belong to technology category of the present utility model.
Claims (9)
1. the overall view ring belt imaging lens based on IR-CUT technology, is characterized in that, from thing side, wraps successively along optical axis directionDraw together: coaxial mounted primary mirror group, corrective lens (eye protection) group, IR-CUT switch and ccd detector,
Wherein, described primary mirror group is used for collecting light, determines visual field size; Described corrective lens (eye protection) group is for to entering from primary mirror group beingThe light of system carries out the correction of aberration, aberration and the elimination of veiling glare; Described IR-CUT switch is used for according to camera lens environment of living inLight power and optical filter before automatic switchover ccd detector; Described ccd detector enters described imaging lens for gatheringOptical signal.
2. the overall view ring belt imaging lens based on IR-CUT technology according to claim 1, is characterized in that, described panorama ringBand imaging lens is two reflective overall view ring belt imaging lens.
3. the overall view ring belt imaging lens based on IR-CUT technology according to claim 2, is characterized in that, described primary mirror groupBe made up of the first speculum and the second speculum, the central authorities of described the second speculum have circular hole, described the first speculum and described inThe second speculum is all taking optical axis as rotation axes of symmetry.
4. the overall view ring belt imaging lens based on IR-CUT technology according to claim 3, is characterized in that, described first anti-Penetrating mirror is concave mirror or convex reflecting mirror; Described the second speculum is the circular endless belt minute surface of indent; Described the first speculum andThe surface of the second speculum has high optical efficiency reflective film.
5. the overall view ring belt imaging lens based on IR-CUT technology according to claim 4, is characterized in that, described primary mirror groupWhile gathering light, light reflection extremely described first speculum of described the second speculum for object in visual field is sent; DescribedOne speculum is for will reflect and pass the circular hole of described the second speculum from the light of described the second speculum, described in warpImaging on system focal plane after the correction of correcting lens group.
6. the overall view ring belt imaging lens based on IR-CUT technology according to claim 1, is characterized in that described IR-CUTSwitch is placed between described corrective lens (eye protection) group and described ccd detector, and with respect to the more close described CCD of described corrective lens (eye protection) groupDetector.
7. the overall view ring belt imaging lens based on IR-CUT technology according to claim 6, is characterized in that described IR-CUTSwitch is made up of two tablet filters and power section, and a slice in two tablet filters of described IR-CUT is 760nm or 780nmCutoff filter, another sheet is full impregnated spectral filter.
8. the overall view ring belt imaging lens based on IR-CUT technology according to claim 7, is characterized in that described IR-CUTThe power section of switch is motor, drives the switching that realizes two tablet filters by motor.
9. the overall view ring belt imaging lens based on IR-CUT technology according to claim 1, is characterized in that, described CCD visitsAfter survey device is placed in described IR-CUT switch, the position of focal plane of the optical system in being formed by primary mirror group and corrective lens (eye protection) group.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521076033.0U CN205246959U (en) | 2015-12-21 | 2015-12-21 | Panorama clitellum imaging lens based on IR -CUT technique |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201521076033.0U CN205246959U (en) | 2015-12-21 | 2015-12-21 | Panorama clitellum imaging lens based on IR -CUT technique |
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| CN205246959U true CN205246959U (en) | 2016-05-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109752915A (en) * | 2017-11-01 | 2019-05-14 | 广州长步道光电科技有限公司 | A kind of 360 ° are looked around outer wall detector lens structure |
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2015
- 2015-12-21 CN CN201521076033.0U patent/CN205246959U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109752915A (en) * | 2017-11-01 | 2019-05-14 | 广州长步道光电科技有限公司 | A kind of 360 ° are looked around outer wall detector lens structure |
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