CN105717613A - Front optical set for starlight-level road monitoring 50-mm zoom optical lens assembly - Google Patents

Front optical set for starlight-level road monitoring 50-mm zoom optical lens assembly Download PDF

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Publication number
CN105717613A
CN105717613A CN201610232460.6A CN201610232460A CN105717613A CN 105717613 A CN105717613 A CN 105717613A CN 201610232460 A CN201610232460 A CN 201610232460A CN 105717613 A CN105717613 A CN 105717613A
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CN
China
Prior art keywords
lens
eyeglass
curvature radius
starlight
refractive index
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CN201610232460.6A
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Chinese (zh)
Inventor
戴根
杨芳
凌永康
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Nanjing Aung Chi Photoelectric Technology Co Ltd
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Nanjing Aung Chi Photoelectric Technology Co Ltd
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Priority to CN201610232460.6A priority Critical patent/CN105717613A/en
Publication of CN105717613A publication Critical patent/CN105717613A/en
Pending legal-status Critical Current

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    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00Optical objectives specially designed for the purposes specified below
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03BAPPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B11/00Filters or other obturators specially adapted for photographic purposes

Abstract

A front optical set for a starlight-level road monitoring 50-mm zoom optical lens assembly is characterized in that the front optical set comprises a front lens cone (1), and a first lens (C1), a second lens (C2), a third lens (C3), a fourth lens (C4) and a fifth lens (C5) are arranged in the front lens cone (1) in sequence in the light incident direction, wherein the first lens (C1) and the second lens (C2) are positive crescent lenses, the third lens (C3) is a biconcave lens, the fourth lens (C4) and the fifth lens (C5) are biconvex lenses, and a tightly-connected gluing set is formed by the third lens (C3) and the fourth lens (C4).The extra large aperture technology is adopted for the starlight-level road monitoring 50-mm zoom optical lens assembly, and the aperture value reaches F2.0; in addition, the multi-layer wideband coating technology and the ultralow chromatic dispersion optical glass technology are adopted for the lenses, so that transmission is effectively improved, and the phenomena of lens flare, ghosting and the like which are likely to exist in a general lens are relieved.

Description

Front optics group for starlight 50 millimeters of focal optical lens assemblies of level road monitoring
Technical field
The present invention relates to camera lens field, especially a kind of front optics group for starlight 50 millimeters of focal optical lens assemblies of level road monitoring.
Background technology
Low-illuminance cameras is the focus product of the monitoring trade released recently as semiconductor technology development.Low-illuminance cameras, from literal just it can be seen that refer to and still can obtain the video camera comparing picture rich in detail when illumination is dark.Front-end camera is generally divided into four grades by current security protection industry: regular grade video camera, general brightness value is all higher than 0.1lux;Brightness value scope video camera between 0.1lux to 0.01lux, is commonly referred to as low-illuminance cameras;And it being referred to as a moon lighting level video camera, its brightness value scope is between 0.01lux to 0.001lux;When minimal illumination value reaches even below 0.0001lux time, just reach the ultra-low illumination video camera of " starlight level ".Without any secondary light source under starlight environment, it is possible to show coloured image clearly, it is different from common camera and is only able to display black white image.
Current low-illuminance cameras is widely used in the fields that day and night monitoring requirement is higher such as safe city, army, frontier defense, bank, hospital, highway.
Summary of the invention
It is an object of the invention to provide a kind of front optics group for starlight 50 millimeters of focal optical lens assemblies of level road monitoring, after cooperation, optics group does not need infrared lamp also without flash lamp to realize 50 millimeters of focal optical lens assemblies of starlight level road monitoring, and can realize not trailing evening colored monitoring clearly.
The technical scheme is that
A kind of front optics group for starlight 50 millimeters of focal optical lens assemblies of level road monitoring, it is characterized in that: described front optics group includes front lens barrel (1), it is disposed with the first eyeglass (C1) along light direction in front lens barrel (1), second eyeglass (C2), 3rd eyeglass (C3), 4th eyeglass (C4) and the 5th eyeglass (C5), wherein the first eyeglass (C1) and the second eyeglass (C2) are positive selenodont lens, 3rd eyeglass (C3) is double concave type lens, 4th eyeglass (C4) and the 5th eyeglass (C5) are lenticular lens, 3rd eyeglass (C3) and the 4th eyeglass (C4) form glued group of contiguity.
The S1 curvature radius of described first eyeglass (C1) is 27.522mm, S2 curvature radius is 38.0795mm, and refractive index is 1.72000 ± 50X10, and abbe number is 43.683 ± 0.8%, effective diameter R1 is 31.37mm, and lens center thickness D1 is 5 ± 0.02mm;The S3 curvature radius of the second eyeglass (C2) is 23.6837mm, S4 curvature radius is 15.323mm, and refractive index is 1.516371 ± 50X10, and abbe number is 64.134 ± 0.8%, effective diameter is 24.17mm, and lens center thickness D2 is 4.05 ± 0.02mm;The S5 curvature radius of the 3rd eyeglass (C3) is-29.038mm, S6 curvature radius is 21.6713mm, and refractive index is 1.846663 ± 50X10, and abbe number is 23.785 ± 0.8%, effective diameter is 23.8mm, and lens center thickness D3 is 2.24 ± 0.02mm;The S7 curvature radius of the 4th eyeglass (C4) is 21.6713mm, S8 curvature radius is-42.964mm, and refractive index is 1.756999 ± 50X10, and abbe number is 47.712 ± 0.8%, effective diameter is 24.9mm, and lens center thickness D4 is 7.15 ± 0.02mm;The S9 curvature radius of the 5th eyeglass (C5) is 59.2601mm, S10 curvature radius is-59.2601mm, and refractive index is 1.945958 ± 50X10, and abbe number is 17.944 ± 0.8%%, effective diameter is 20mm, and lens center thickness D5 is 6.6 ± 0.02mm.
The invention has the beneficial effects as follows:
50 millimeters of focal optical lens assemblies of the starlight level road monitoring of the present invention adopt super large aperture technology, and f-number reaches F2.0;Additionally, camera lens adopts multilamellar broadband coating technique, ED optical glass technology, it is effectively improved logical light rate, alleviates the phenomenons such as glare, ghost that common lens easily occurs;Outward appearance aspect, this kind of camera lens all-metal fuselage, camera lens is also functioned to good resistance to compression, protective effect by metal shell.
Maximum scenes applied by 50 millimeters of focal optical lens assemblies of the starlight level road monitoring of the present invention is on road monitoring, it is necessary to can see integrated environment clearly, can suppress again vehicular traffic headlight, see car plate clearly.Low according to needing under scene to allow more light enter video camera as far as possible on the one hand, need excessively bright high light reduction but then, otherwise easy overexposure interference imaging effect.50 millimeters of focal optical lens assemblies of starlight level road monitoring of the present invention solve this difficult problem, and in actual monitored, car headlight high light is pressed, and it is high-visible that vehicle body details includes car plate, and periphery road environment is also very clear.
Along with the raising of pixel, colored low more poor according to effect, this is owing to the size of sensor is required by video camera, and when change in size is little, pixel is more many, and the photosensitive area of unit picture element is more little, thus low more poor according to effect.Current starlight level video camera, based on 1080P resolution, is all based on 1/2 " left and right sensor, and the 300W video camera of main flow is all based on 1/3 on the market " sensor, naturally be difficult to night obtain low photograph effect.And the sensor size that the present invention adopts is 2/3 " left and right, low effect of shining is better than prior art naturally, is the combination of high-resolution and starlight level technology, overcomes the low drawback according to weak effect.
Invent and ensure the airspace between each lens by machinery spacer ring, and be provided with delustring screw thread at machinery spacer ring inwall, can effectively eliminate the veiling glare of camera lens, improve the resolution of camera lens.
The screw thread design of filter ring front-end port, it is simple to user arbitrarily increases and decreases suitable filter lens on camera lens, and filter ring has shade function, can also take into account guarantee and eliminate system edges veiling glare function while improving aesthetic property.The present invention can effectively reduce the bore of eyeglass below so that system can be designed to C interface structure general on the market, increases versatility.
Accompanying drawing explanation
Fig. 1 is the overall structural representation of the present invention.
Fig. 2 is the structural representation of the front optics group of the present invention.
Fig. 3 is the structural representation of the rear optics group of the present invention.
Fig. 4 is the structural representation of first eyeglass of the present invention.
Fig. 5 is the structural representation of second eyeglass of the present invention.
Fig. 6 is the structural representation of the 3rd eyeglass of the present invention.
Fig. 7 is the structural representation of the 4th eyeglass of the present invention.
Fig. 8 is the structural representation of the 5th eyeglass of the present invention.
Fig. 9 is the structural representation of the 6th eyeglass of the present invention.
Figure 10 is the structural representation of the 7th eyeglass of the present invention.
Figure 11 is the structural representation of the 8th eyeglass of the present invention.
Figure 12 is the structural representation of the 9th eyeglass of the present invention.
Figure 13 is the structural representation of the tenth eyeglass of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described:
Such as Fig. 1 to Figure 13, a kind of front optics group for starlight 50 millimeters of focal optical lens assemblies of level road monitoring, it is characterized in that: described front optics group includes front lens barrel (1), it is disposed with the first eyeglass (C1) along light direction in front lens barrel (1), second eyeglass (C2), 3rd eyeglass (C3), 4th eyeglass (C4) and the 5th eyeglass (C5), wherein the first eyeglass (C1) and the second eyeglass (C2) are positive selenodont lens, 3rd eyeglass (C3) is double concave type lens, 4th eyeglass (C4) and the 5th eyeglass (C5) are lenticular lens, 3rd eyeglass (C3) and the 4th eyeglass (C4) form glued group of contiguity.
The S1 curvature radius of described first eyeglass (C1) is 27.522mm, S2 curvature radius is 38.0795mm, and refractive index is 1.72000 ± 50X10, and abbe number is 43.683 ± 0.8%, effective diameter R1 is 31.37mm, and lens center thickness D1 is 5 ± 0.02mm;The S3 curvature radius of the second eyeglass (C2) is 23.6837mm, S4 curvature radius is 15.323mm, and refractive index is 1.516371 ± 50X10, and abbe number is 64.134 ± 0.8%, effective diameter is 24.17mm, and lens center thickness D2 is 4.05 ± 0.02mm;The S5 curvature radius of the 3rd eyeglass (C3) is-29.038mm, S6 curvature radius is 21.6713mm, and refractive index is 1.846663 ± 50X10, and abbe number is 23.785 ± 0.8%, effective diameter is 23.8mm, and lens center thickness D3 is 2.24 ± 0.02mm;The S7 curvature radius of the 4th eyeglass (C4) is 21.6713mm, S8 curvature radius is-42.964mm, and refractive index is 1.756999 ± 50X10, and abbe number is 47.712 ± 0.8%, effective diameter is 24.9mm, and lens center thickness D4 is 7.15 ± 0.02mm;The S9 curvature radius of the 5th eyeglass (C5) is 59.2601mm, S10 curvature radius is-59.2601mm, and refractive index is 1.945958 ± 50X10, and abbe number is 17.944 ± 0.8%%, effective diameter is 20mm, and lens center thickness D5 is 6.6 ± 0.02mm.
A kind of 50 millimeters of focal optical lens assemblies of starlight level road monitoring, described optical lens assembly includes body tube (3), being disposed with front lens barrel (1), diaphragm governor motion (7) and rear lens barrel (2) along light direction in described body tube (3), diaphragm governor motion (7) is arranged between front lens barrel (1) and rear lens barrel (2);It is disposed with the first eyeglass (C1), the second eyeglass (C2), the 3rd eyeglass (C3), the 4th eyeglass (C4) and the 5th eyeglass (C5) along light direction in described front lens barrel (1), wherein the first eyeglass (C1) and the second eyeglass (C2) are positive selenodont lens, 3rd eyeglass (C3) is double concave type lens, 4th eyeglass (C4) and the 5th eyeglass (C5) are lenticular lens, and the 3rd eyeglass (C3) and the 4th eyeglass (C4) form glued group of contiguity;It is disposed with the 6th eyeglass (C6), the 7th eyeglass (C7), the 8th eyeglass (C8), the 9th eyeglass (C9) and the tenth eyeglass (C10) along light direction in described rear lens barrel (2), wherein the 6th eyeglass (C6) and the tenth eyeglass (C10) are double concave type lens, 7th eyeglass (C7), the 8th eyeglass (C8) and the 9th eyeglass (C9) are lenticular lens, and the 6th eyeglass (C6) and the 7th eyeglass (C7) form glued group of contiguity;9th eyeglass (C9) and the tenth eyeglass (C10) form glued group of contiguity;Front lens barrel (1) is provided externally with the focusing handwheel (5) threadeded with it, and focusing handwheel (5) rotates socket with body tube (3);Body tube (3) rotates socket with aperture handwheel (4), and front lens barrel (1) front end is provided with filter ring (6).
The focal length of described starlight 50 millimeters of focal optical lens assemblies of level road monitoring is 50mm ± 2mm, and the angle of visual field is 36 ° ± 1.8 °.
The S1 curvature radius of described first eyeglass (C1) is 27.522mm, S2 curvature radius is 38.0795mm, and refractive index is 1.72000 ± 50X10, and abbe number is 43.683 ± 0.8%, effective diameter R1 is 31.37mm, and lens center thickness D1 is 5 ± 0.02mm;The S3 curvature radius of the second eyeglass (C2) is 23.6837mm, S4 curvature radius is 15.323mm, and refractive index is 1.516371 ± 50X10, and abbe number is 64.134 ± 0.8%, effective diameter R2 is 24.17mm, and lens center thickness D2 is 4.05 ± 0.02mm;The S5 curvature radius of the 3rd eyeglass (C3) is-29.038mm, S6 curvature radius is 21.6713mm, and refractive index is 1.846663 ± 50X10, and abbe number is 23.785 ± 0.8%, effective diameter R3 is 23.8mm, and lens center thickness D3 is 2.24 ± 0.02mm;The S7 curvature radius of the 4th eyeglass (C4) is 21.6713mm, S8 curvature radius is-42.964mm, and refractive index is 1.756999 ± 50X10, and abbe number is 47.712 ± 0.8%, effective diameter R4 is 24.9mm, and lens center thickness D4 is 7.15 ± 0.02mm;The S9 curvature radius of the 5th eyeglass (C5) is 59.2601mm, S10 curvature radius is-59.2601mm, and refractive index is 1.945958 ± 50X10, and abbe number is 17.944 ± 0.8%%, effective diameter R5 is 20mm, and lens center thickness D5 is 6.6 ± 0.02mm.
The S11 curvature radius of described 6th eyeglass (C6) is-33.96mm, S12 curvature radius is 20.1875mm, and refractive index is 1.639802 ± 50X10, and abbe number is 34.486 ± 0.8%, effective diameter R6 is 23.6mm, and lens center thickness D6 is 2.2 ± 0.02mm;The S13 curvature radius of the 7th eyeglass (C7) is 20.1879mm, S14 curvature radius is-29.0191mm, and refractive index is 1.607381 ± 50X10, and abbe number is 56.657 ± 0.8%, effective diameter R7 is 22.2mm, and lens center thickness D7 is 8.8 ± 0.02mm;The S15 curvature radius of the 8th eyeglass (C8) is 65.6766mm, S16 curvature radius is-194.4402mm, and refractive index is 1.772499 ± 50X10, and abbe number is 49.601 ± 0.8%, effective diameter R8 is 21.6mm, and lens center thickness D8 is 3.7 ± 0.02mm;The S7 curvature radius of the 9th eyeglass (C9) is 58.1029mm, S18 curvature radius is-26.4672mm, and refractive index is 1.496997 ± 50X10, and abbe number is 81.608 ± 0.8%, effective diameter R9 is 19.7mm, and lens center thickness D9 is 6.1 ± 0.02mm;The S19 curvature radius of the tenth eyeglass (C10) is-26.4672mm, S20 curvature radius is 32.625mm, and refractive index is 1.903664 ± 50X10, and abbe number is 31.318 ± 0.8%, effective diameter R10 is 20.4mm, and lens center thickness D10 is 7.38 ± 0.02mm.
The present invention arranges that focusing governor motion is preposition, and diaphragm governor motion is rearmounted, contributes to the consistent coordination of the rational deployment of structure and overall ratio.Focusing governor motion adopts the positive and negative thread of different lead to grind cooperation and focuses, spacing to rear lens cone seat and body tube by banking pin, arc-shaped step, when rotating focusing handwheel 5, after making focusing handwheel 5 drive front lens barrel 1 relatively, lens barrel 2 moves in a circle and trace quantity helix advances or retreats, focusing action accurately, reliable, without clamping stagnation.
Embodiment described above is only that the preferred embodiment of the present invention is described; not the spirit and scope of the present invention are defined; without departing under design concept premise of the present invention; various modification that in this area, technical scheme is made by ordinary skill technical staff and improvement; all should falling into protection scope of the present invention, the technology contents that the present invention is claimed all is recorded in detail in the claims.

Claims (2)

1. the front optics group for starlight 50 millimeters of focal optical lens assemblies of level road monitoring, it is characterized in that: described front optics group includes front lens barrel (1), it is disposed with the first eyeglass (C1) along light direction in front lens barrel (1), second eyeglass (C2), 3rd eyeglass (C3), 4th eyeglass (C4) and the 5th eyeglass (C5), wherein the first eyeglass (C1) and the second eyeglass (C2) are positive selenodont lens, 3rd eyeglass (C3) is double concave type lens, 4th eyeglass (C4) and the 5th eyeglass (C5) are lenticular lens, 3rd eyeglass (C3) and the 4th eyeglass (C4) form glued group of contiguity.
2. the front optics group for starlight 50 millimeters of focal optical lens assemblies of level road monitoring according to claim 1, it is characterized in that the S1 curvature radius of described first eyeglass (C1) is 27.522mm, S2 curvature radius is 38.0795mm, refractive index is 1.72000 ± 50X10, abbe number is 43.683 ± 0.8%, effective diameter R1 is 31.37mm, and lens center thickness D1 is 5 ± 0.02mm;The S3 curvature radius of the second eyeglass (C2) is 23.6837mm, S4 curvature radius is 15.323mm, and refractive index is 1.516371 ± 50X10, and abbe number is 64.134 ± 0.8%, effective diameter is 24.17mm, and lens center thickness D2 is 4.05 ± 0.02mm;The S5 curvature radius of the 3rd eyeglass (C3) is-29.038mm, S6 curvature radius is 21.6713mm, and refractive index is 1.846663 ± 50X10, and abbe number is 23.785 ± 0.8%, effective diameter is 23.8mm, and lens center thickness D3 is 2.24 ± 0.02mm;The S7 curvature radius of the 4th eyeglass (C4) is 21.6713mm, S8 curvature radius is-42.964mm, and refractive index is 1.756999 ± 50X10, and abbe number is 47.712 ± 0.8%, effective diameter is 24.9mm, and lens center thickness D4 is 7.15 ± 0.02mm;The S9 curvature radius of the 5th eyeglass (C5) is 59.2601mm, S10 curvature radius is-59.2601mm, and refractive index is 1.945958 ± 50X10, and abbe number is 17.944 ± 0.8%%, effective diameter is 20mm, and lens center thickness D5 is 6.6 ± 0.02mm.
CN201610232460.6A 2016-04-14 2016-04-14 Front optical set for starlight-level road monitoring 50-mm zoom optical lens assembly Pending CN105717613A (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1213085A (en) * 1997-07-11 1999-04-07 三星航空产业株式会社 Compact zoom lens system
CN2513128Y (en) * 2001-12-25 2002-09-25 玉晶光电(厦门)有限公司 Image lens
CN203149184U (en) * 2012-01-17 2013-08-21 福州开发区鸿发光电子技术有限公司 Two-component optical compensation zoom lens
CN205067851U (en) * 2015-09-01 2016-03-02 深圳市三优光电有限公司 Heart projecting lens far away

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1213085A (en) * 1997-07-11 1999-04-07 三星航空产业株式会社 Compact zoom lens system
CN2513128Y (en) * 2001-12-25 2002-09-25 玉晶光电(厦门)有限公司 Image lens
CN203149184U (en) * 2012-01-17 2013-08-21 福州开发区鸿发光电子技术有限公司 Two-component optical compensation zoom lens
CN205067851U (en) * 2015-09-01 2016-03-02 深圳市三优光电有限公司 Heart projecting lens far away

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Application publication date: 20160629