CN205193343U - Dual -purpose varifocal optical lens of day night of glass aspheric surface of little change multiple proportions - Google Patents
Dual -purpose varifocal optical lens of day night of glass aspheric surface of little change multiple proportions Download PDFInfo
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- CN205193343U CN205193343U CN201520875073.5U CN201520875073U CN205193343U CN 205193343 U CN205193343 U CN 205193343U CN 201520875073 U CN201520875073 U CN 201520875073U CN 205193343 U CN205193343 U CN 205193343U
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Abstract
The utility model relates to a dual -purpose varifocal optical lens of day night of glass aspheric surface of little change multiple proportions, optical lens includes and doubly organizes B for the prefocusing compensation A of group and a focal power of burden for the back change of burden from the focal power that the left hand right side set gradually along input path, the A of prefocusing compensation group comprises crescent moon lens A1, biconcave lens A2 and the crescent moon lens A3 who sets gradually from the left hand right side, back change is doubly organized B and comprises biconvex type aspherical lens B1, biconvex lens B2, biconcave lens B3 and the biconvex lens B4 who sets gradually from the left hand right side, crescent moon lens A1, biconcave lens A2, crescent moon lens A3, biconvex type aspherical lens B1, biconvex lens B2, biconcave lens B3 and biconvex lens B4's center all is located input path's axis. The utility model provides an optical lens reduces zoom lens's change multiple proportions, reduces optical structure length, improves camera lens resolution ratio.
Description
Technical field
The utility model relates to optical field, particularly relates to a kind of day and night varifocal optical lens of Glass aspheric of little zoom ratio.
Background technology
The enhancing that material along with the melting of high/low temperature optical glass is weeded out the old and bring forth the new day by day and social security protection is realized, safety monitoring just constantly expands at design freedom and market range of application, and security product classification and performance correspondingly change simultaneously.Major part optical articles adopts pick-up lens to realize monitoring in real time far and near target, has more and more higher requirement to the resolution of optical lens, structure length.
The camera lens of the especially little zoom group of two constituent element zoom lens is used in the middle of safety monitoring camera lens recently successively.And comparatively traditional optical texture pattern is made up of prefocusing group, rear zoom group two constituent elements, with reference to the light channel structure of Chinese patent CN102707409, but the technical scheme that this patent provides exists, and glass sheet number is many, structure long, optics rear cut-off distance is short, the not high defect of resolution.
Utility model content
The purpose of this utility model is for above weak point, provides the day and night varifocal optical lens of the Glass aspheric of kind of little zoom ratio, reduces the zoom ratio of zoom lens, reduces optical texture length, improves the resolution of optical lens.
The scheme that the utility model technical solution problem adopts is: a kind of day and night varifocal optical lens of Glass aspheric of little zoom ratio, and it be negative prefocusing compensating group A and a focal power is negative rear zoom group B that described optical lens comprises the focal power set gradually from left to right along input path; Described prefocusing compensating group A is made up of the crescent moon lens A1, the biconcave lens A2 that set gradually from left to right and crescent moon lens A3, and described rear zoom group B is made up of biconvex non-spherical lens B1, biconvex lens B2, biconcave lens B3 and the biconvex lens B4 set gradually from left to right; The center of described crescent moon lens A1, biconcave lens A2, crescent moon lens A3, biconvex non-spherical lens B1, biconvex lens B2, biconcave lens B3 and biconvex lens B4 is all positioned on the axis of input path.
Further, described biconcave lens A2 and crescent moon lens A3 cooperation composes the first glue pellet; Described biconvex lens B2 and biconcave lens B3 cooperation composes the second glue pellet.
Further, the focal power of described crescent moon lens A1 is-10.5294; The focal power of described first glue pellet is-58.205, and the focal power of described biconvex non-spherical lens B1 is 11.408; The focal power of described second glue pellet is-14.783; The focal power of described biconvex lens B4 is 10.662.
Further, also comprise a diaphragm between described crescent moon lens A3 and biconvex non-spherical lens B1, the airspace between described crescent moon lens A3 and diaphragm apart from minimum be 1.91mm, be 12.88mm to the maximum; The airspace of described biconvex non-spherical lens B1 and diaphragm apart from minimum be 0.40mm, be 7.91mm to the maximum.
Compared with prior art, the utility model has following beneficial effect: in light path design, focal power is negative prefocusing compensating group A and a focal power is negative rear zoom group B two constituent elements.Movable with rear zoom group B, achieves the change of whole focal length, by prefocusing compensating group A compensate rear zoom group B move time, the movement of picture point, makes the distance of diaphragm and CCD constant, thus makes overall image planes invariant position.
Rear zoom group B, except realizing long-focus, realizes focusing by the movable of prefocusing compensating group A simultaneously.Meanwhile, adopt the optical texture of anti-long distance, reasonable distribution prefocusing compensating group A(tri-eyeglasses) and rear zoom group B(tetra-eyeglasses) focal power; The design of biconvex non-spherical lens B1, makes camera lens reach the short performance of large relative aperture, wide-angle and structure length.
Varifocal optical lens of the present utility model: focal distance f ' min=3mm, f'max=9mm; Relative aperture
D/f '=1/2.6 ~ 1/1.8; Image space linear field 2 η ' >=φ 7.2.And, the focal length of reasonable distribution prefocusing group A, rear zoom group B two constituent elements in optical design, zoom lens is made to reach corresponding focal length, low zoom ratio, especially the focal length of zoom group after shortening, make that the optical texture length of zoom lens is short, zoom helical pitch is little: focal distance f ' max=9mm, zoom ratio be 3 times time, optical length is less than 40.72mm.Be convenient to camera lens be arranged on the universal The Cloud Terrace of miniaturization.Suitably increase the focal length of prefocusing group, and the airspace between each of the rear zoom of adjustment, the rear cut-off distance with growth system: optics rear cut-off distance L '=8mm of the present utility model, makes zoom lens can support the use with IR-cut filter plate.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model patent is further illustrated.
Fig. 1 is the eyeglass schematic diagram of the short burnt 3mm of the utility model embodiment.
Fig. 2 is the eyeglass schematic diagram of the focal length 9mm of the utility model embodiment.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is further illustrated.
As shown in Fig. 1 ~ 2, the utility model embodiment provides a kind of day and night varifocal optical lens of Glass aspheric of little zoom ratio, and it be negative prefocusing compensating group A and a focal power is negative rear zoom group B that described optical lens comprises the focal power set gradually from left to right along input path; Described prefocusing compensating group A is made up of the crescent moon lens A1, the biconcave lens A2 that set gradually from left to right and crescent moon lens A3, and described rear zoom group B is made up of biconvex non-spherical lens B1, biconvex lens B2, biconcave lens B3 and the biconvex lens B4 set gradually from left to right; The center of described crescent moon lens A1, biconcave lens A2, crescent moon lens A3, biconvex non-spherical lens B1, biconvex lens B2, biconcave lens B3 and biconvex lens B4 is all positioned on the axis of input path.
In the present embodiment, described biconcave lens A2 and crescent moon lens A3 cooperation composes the first glue pellet; Described biconvex lens B2 and biconcave lens B3 cooperation composes the second glue pellet.
In the present embodiment, the focal power of described crescent moon lens A1 is-10.5294, and its radius-of-curvature is respectively R1=36.930, R2=6.291, and refractive index is n1=1.729; The focal power of described first glue pellet is-58.205, its radius-of-curvature is respectively R1=-17.295, R2=8.905, R3=62.770, refractive index is respectively n1=1.581, n2=1.847, the focal power of described biconvex non-spherical lens B1 is 11.408, radius of curvature R 1=8.000, R2=-16.515, refractive index is n1=1.497; The focal power of described second glue pellet is-14.783, radius of curvature R 1=14.863, R2=-14.863, R3=7.126, and refractive index is respectively n1=1.694, n2=1.850; The focal power of described biconvex lens B4 is 10.662, radius of curvature R 1=12.594, R2=-12.594.Wherein have two curvature radius values of segment glass sheet equal in the second glue pellet and biconvex lens B4, reduce pick up select process be convenient to group assemble camera lens immediately.
In the present embodiment, also comprise a diaphragm 1 between described crescent moon lens A3 and biconvex non-spherical lens B1, the airspace between described crescent moon lens A3 and diaphragm 1 apart from minimum be 1.91mm, be 12.88mm to the maximum; The airspace of described biconvex non-spherical lens B1 and diaphragm 1 apart from minimum be 0.40mm, be 7.91mm to the maximum.The right side of described biconvex lens B4 is also provided with the distance measuring sensor 2 of a measurement optical mirror slip to the distance of optical cable.
From the foregoing, the optical lens of the focal power that the utility model provides to be negative prefocusing compensating group A and a focal power be varifocal that negative rear zoom group B two constituent elements form, reach high performance Gaussian optics index and excellent resolution, its mid-focal length: f'min=3mm, f'max=9mm(zoom ratio: 3 times); Relative aperture: D/f '=1/1.80 ~ 1/2.60; Field angle: 2 ω >=40 ° ~ 132; Optics rear cut-off distance: l ' >=6.50mm optical texture length: Σ D≤50.70mm; Zoom stroke :≤15.59mm.
In sum, the day and night varifocal optical lens of the Glass aspheric of the little zoom ratio that the utility model provides reduces the zoom ratio of zoom lens, reduces optical texture length, improves resolution of lens.
The above-listed preferred embodiment that the utility model provides; the purpose of this utility model, technical scheme and advantage are further described; be understood that; the foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (4)
1. a day and night varifocal optical lens for the Glass aspheric of little zoom ratio, is characterized in that: it be negative prefocusing compensating group A and a focal power is negative rear zoom group B that described optical lens comprises the focal power set gradually from left to right along input path; Described prefocusing compensating group A is made up of the crescent moon lens A1, the biconcave lens A2 that set gradually from left to right and crescent moon lens A3, and described rear zoom group B is made up of biconvex non-spherical lens B1, biconvex lens B2, biconcave lens B3 and the biconvex lens B4 set gradually from left to right; The center of described crescent moon lens A1, biconcave lens A2, crescent moon lens A3, biconvex non-spherical lens B1, biconvex lens B2, biconcave lens B3 and biconvex lens B4 is all positioned on the axis of input path.
2. the day and night varifocal optical lens of the Glass aspheric of a kind of little zoom ratio according to claim 1, is characterized in that: described biconcave lens A2 and crescent moon lens A3 cooperation composes the first glue pellet; Described biconvex lens B2 and biconcave lens B3 cooperation composes the second glue pellet.
3. the day and night varifocal optical lens of the Glass aspheric of little zoom ratio according to claim 2, is characterized in that: the focal power of described crescent moon lens A1 is-10.5294; The focal power of described first glue pellet is-58.205, and the focal power of described biconvex non-spherical lens B1 is 11.408; The focal power of described second glue pellet is-14.783; The focal power of described biconvex lens B4 is 10.662.
4. the day and night varifocal optical lens of the Glass aspheric of little zoom ratio according to claim 1, it is characterized in that: also comprise a diaphragm between described crescent moon lens A3 and biconvex non-spherical lens B1, airspace between described crescent moon lens A3 and diaphragm apart from minimum be 1.91mm, be 12.88mm to the maximum; The airspace of described biconvex non-spherical lens B1 and diaphragm apart from minimum be 0.40mm, be 7.91mm to the maximum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520875073.5U CN205193343U (en) | 2015-11-05 | 2015-11-05 | Dual -purpose varifocal optical lens of day night of glass aspheric surface of little change multiple proportions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520875073.5U CN205193343U (en) | 2015-11-05 | 2015-11-05 | Dual -purpose varifocal optical lens of day night of glass aspheric surface of little change multiple proportions |
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| Publication Number | Publication Date |
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| CN205193343U true CN205193343U (en) | 2016-04-27 |
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| CN201520875073.5U Active CN205193343U (en) | 2015-11-05 | 2015-11-05 | Dual -purpose varifocal optical lens of day night of glass aspheric surface of little change multiple proportions |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105242385A (en) * | 2015-11-05 | 2016-01-13 | 福建福光股份有限公司 | Glass aspheric day and night optical zoom lens with low zoom ratio |
| CN111679415A (en) * | 2020-06-15 | 2020-09-18 | 福建福光股份有限公司 | 3.2-7.2mm economic glass-plastic mixed high-definition miniature zoom lens |
-
2015
- 2015-11-05 CN CN201520875073.5U patent/CN205193343U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105242385A (en) * | 2015-11-05 | 2016-01-13 | 福建福光股份有限公司 | Glass aspheric day and night optical zoom lens with low zoom ratio |
| CN105242385B (en) * | 2015-11-05 | 2017-11-21 | 福建福光股份有限公司 | The day and night varifocal optical lens of the Glass aspheric of small zoom ratio |
| CN111679415A (en) * | 2020-06-15 | 2020-09-18 | 福建福光股份有限公司 | 3.2-7.2mm economic glass-plastic mixed high-definition miniature zoom lens |
| CN111679415B (en) * | 2020-06-15 | 2022-09-16 | 福建福光股份有限公司 | 3.2-7.2mm economic glass-plastic mixed high-definition miniature zoom lens |
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