CN101666905B - Large-zoom ratio optical zoom lens - Google Patents
Large-zoom ratio optical zoom lens Download PDFInfo
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- CN101666905B CN101666905B CN2009101125982A CN200910112598A CN101666905B CN 101666905 B CN101666905 B CN 101666905B CN 2009101125982 A CN2009101125982 A CN 2009101125982A CN 200910112598 A CN200910112598 A CN 200910112598A CN 101666905 B CN101666905 B CN 101666905B
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- eyeglass
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Abstract
A large-zoom ratio optical zoom lens is provided with a front fixed lens group G1 with positive focal power, a varifocus lens group G2 with negative focal power, a diaphragm, a back fixed lens group G3 with positive focal power and a last varifocus compensating lens group G4, wherein the varifocus lens group G2 is arranged at the image side of the front fixed lens group G1; the back fixed lens group G3 is arranged at the image side of the diaphragm; and the varifocus compensating lens group G4 is arranged at the image side. The relative location change between the varifocus lens group G2 with negative focal power and the varifocus compensating lens group G4 with positive focal power is utilized to realize 16X optical zoom with the focal length ranging from 6-96mm. The lens can realize focal length f=6-96mm, field angle 2W=56.8 degrees to 3.6 degrees and relative aperture F=1.95, which is an 16X large-zoom ratio optical zoom lens capable of changing focal length from short focus, medium focus to long focus. A corresponding camera matched with the lens can monitor targets in different distances by changing the focal length of the optical zoom lens.
Description
Technical field
The utility model belongs to the optical, mechanical and electronic integration field, relates to a kind of large-zoom ratio optical zoom lens.Particularly about a kind of from short Jiao, Jiao to the Zoom optic lens of long burnt 16 times of big optical zoom scopes.
Technical background
Common monitoring tight shot is to use at more stable occasion, and the focal length and the field angle that do not need to change the monitoring camera lens just can satisfy general monitoring needs.But, under the bigger occasion of some monitoring objective scopes of activities, just require supervisory system can on image planes, obtain the target of the picture of different magnifications with the far and near different distance of clear resolution.According to image-forming principle, for tight shot, want on image planes, to obtain the picture of different magnifications, must change the distance of target to camera lens, and the monitoring camera lens all is fixed usually, simultaneously monitoring objective can be initiatively near the monitoring camera lens, so be to be difficult to satisfy the bigger monitoring requirement of monitoring objective scope of activities for the monitoring tight shot.And the utility model large-zoom ratio optical zoom lens, thereby the method by mechanical compensation changes the focal length of optical system obtains different magnifications on image planes picture, and zoom capabilities with 16 times of big zoom ratios, simultaneously, in whole zoom process, picture element has all reached the image quality of tight shot.As seen, the utility model large-zoom ratio optical zoom lens is with a wide range of applications, and has complied with the development trend of monitoring trade, and market potential is huge.
Summary of the invention
The purpose of this utility model is a kind of Zoom optic lens with big zoom ratio ability of design.This camera lens mates corresponding video camera, thereby can monitor the target of far and near different distance by the focal length that changes Zoom optic lens clearly.This camera lens has 16 times big zoom ratio abilities, and picture element has also reached the image quality of tight shot, and compact conformation, simple operation, and the utilization prospect is wide.
Referring to accompanying drawing 1, the utility model comprises four lens combination, these lens combination comprise the preceding fixed lens group G1 of a positive light coke successively from object plane to image planes, with the variable focus lens package G2 that is disposed at preceding fixed lens group G1 with negative power as side, diaphragm, be disposed at the back fixed lens group G3 with positive light coke of diaphragm as side, and last group zoom offset lens group G4 that is disposed at the picture side.Utilize the relative position between the zoom offset lens group G4 of the variable focus lens package G2 of negative power and positive light coke to change 16 Zoom Lens of realizing focal length 6-96mm.Described preceding fixed lens group G1 is contained in main tube [7] front portion, fixes [7] with a preceding trim ring [1] in main tube; Described variable focus lens package G2 is contained in the preceding arrangement of mirrors tube [4] that radially is provided with three guide pins; Described back fixedly is assembled in the rear portion of main tube [7], fixes with trim ring [6] after; Described zoom offset lens group G4 is contained in the back arrangement of mirrors tube [18] that radially is provided with three guide pins, preceding arrangement of mirrors tube [4] and back arrangement of mirrors tube [18] are contained in the main tube [7] of spirality groove, forward and backward arrangement of mirrors tube is connected with main tube by guide pin, forward and backward arrangement of mirrors tube can be slided up and down at main tube inside spin, cam [9] is adjusted in preceding adjustment cam [8] that respectively has three straight troughs and back by group before and after adjusting respectively, realize changing the relative position between variable focus lens package G2 and the zoom offset lens group G4, thereby reach the purpose of zoom.
Referring to accompanying drawing 1,2,3, it is that the negative eyeglass L1 of convex-concave, second lens are the 3rd positive lens L3 of positive eyeglass L2 of concave-concave and convex-concave that preceding fixed lens group G1 in this patent has by tactic first lens of object one side, and the described first lens L1 and the second lens L2 are the gummed assembly.It is the negative eyeglass L4 of convex-concave that variable focus lens package G2 in this patent has by tactic the 4th lens of object one side, and the 5th lens are the negative eyeglass L5 of concave-concave, and the 6th lens are the positive eyeglass L6 of convex-concave, and described the 5th lens L5 and the 6th lens L6 are the gummed assembly.It is the positive eyeglass L7 of biconvex that back fixed lens group G3 in this patent has by tactic the 7th lens of object one side, and the 8th lens are the positive eyeglass L8 of biconvex, and the 9th lens are the negative eyeglass L9 of concave-concave.It is concavo-convex positive eyeglass L10 that zoom offset lens group G4 in this patent has by tactic the tenth lens of object one side, and the 11 lens are the negative eyeglass L11 of convex-concave, and the 12 lens are the positive eyeglass L12 of biconvex.
Referring to accompanying drawing 4, the focal length of 12 optical lenses in this patent optical system and refractive index and 22 radius-of-curvature thereof meet the following conditions respectively:
-75＜f1＜-50 1.72＜n1＜1.92 45＜R1＜65 18＜R2＜38
35＜f2＜55 1.61＜n2＜1.81 18＜R2＜38 300＜R3＜500
51＜f3＜71 1.61＜n3＜1.81 19＜R4＜29 50＜R5＜70
Diaphragm
-25＜f4＜-15 1.65＜n4＜1.85 10＜R6＜20 5＜R7＜13
-15＜f5＜-5 1.65＜n5＜1.85 -18＜R8＜-9 5.5＜R9＜16.5
7.5＜f6＜20 1.73＜n6＜1.93 5.5＜R9＜16.5 350＜R10＜550
18＜f7＜38 1.55＜n7＜1.75 35＜R11＜60 -35＜R12＜-15
16＜f8＜35 1.62＜n8＜1.82 15＜R13＜35 -30＜R14＜-20
-31＜f9＜-12 1.70＜n9＜1.90 -35＜R15＜-15 80＜R16＜130
42＜f10＜62 1.65＜n10＜1.80 -35＜R17＜-15 -30＜R18＜-10
-31＜f11＜-13?1.70＜n11＜1.90 14＜R19＜25 6.5＜R20＜12.5
9＜f12＜22 1.65＜n12＜1.85 7.5＜R21＜14.5 R22＝∞
The main optical index of product: focal distance f=696mm, field angle 2W=56.8 °-3.6 °, relative aperture F=1.95, the corresponding 1/3 cun CCD of imaging size.
The high-resolution lens optical-modulation transfer function MTF that makes according to such scheme is when 60lp/mm, and visual field, center degree of modulation reaches 0.65, and visual field, edge degree of modulation reaches 0.5.
Description of drawings
Accompanying drawing 1 is the lens assembly structural drawing
Accompanying drawing 2 is focal length optical system synoptic diagram when 6mm
Accompanying drawing 3 is focal length optical system synoptic diagram when 96mm
Accompanying drawing 4 is synoptic diagram of the radius-of-curvature and the refractive index of optical system glass mirror
Embodiment
Referring to accompanying drawing 1,2,3,4, four mirror groups of this patent comprise: fixed lens group G1, variable focus lens package G2, back fixed lens group G3, zoom offset lens group G4 presses second section described structure of summary of the invention and implements, four mirror groups comprise: first lens are the negative eyeglass L1 of convex-concave, second lens are the positive eyeglass L2 of concave-concave, the 3rd positive lens L3 of convex-concave, the 4th lens are the negative eyeglass L4 of convex-concave, the 5th lens are the negative eyeglass L5 of concave-concave, the 6th lens are the positive eyeglass L6 of convex-concave, the 7th lens are the positive eyeglass L7 of biconvex, the 8th lens are the positive eyeglass L8 of biconvex, the 9th lens are the negative eyeglass L9 of concave-concave, the tenth lens are concavo-convex positive eyeglass L10, the 11 lens are the negative eyeglass L11 of convex-concave, the 12 lens are the positive eyeglass L12 of biconvex, the first lens L1 and the second lens L2 are the gummed assembly, the 5th lens L5 and the 6th lens L6 are the gummed assembly, the focal length of totally ten two optical lenses and refractive index and 22 radius-of-curvature are pressed the 4th section described enforcement of summary of the invention, the large-zoom ratio optical zoom lens of making, can realize the 16 times zooms of focal length in the 6-96mm scope, each focal length point image quality is good in whole zoom process.And the basic parameter of each eyeglass is reasonable in this zoom lens, is easy to processing, is fit to produce in enormous quantities, has vast market prospect.
Claims (2)
1. large-zoom ratio optical zoom lens, it is characterized in that it comprises four lens combination, be followed successively by the preceding fixed lens group G1 of a positive light coke to image planes from object plane, with the variable focus lens package G2 that is disposed at preceding fixed lens group G1 with negative power as side, diaphragm, be disposed at the back fixed lens group G3 with positive light coke of diaphragm as side, and the offset lens group G4 that is disposed at the picture side; It is that the negative eyeglass L1 of convex-concave, second lens are the 3rd positive lens L3 of positive eyeglass L2 of concave-concave and convex-concave that preceding fixed lens group G1 has by tactic first lens of object one side, and the first lens L1 and the second lens L2 are the gummed assembly; It is the negative eyeglass L4 of convex-concave that variable focus lens package G2 has by tactic the 4th lens of object one side, and the 5th lens are the negative eyeglass L5 of concave-concave, and the 6th lens are the positive eyeglass L6 of convex-concave, and the 5th lens L5 and the 6th lens L6 are the gummed assembly; It is the positive eyeglass L7 of biconvex that back fixed lens group G3 has by tactic the 7th lens of object one side, and the 8th lens are the positive eyeglass L8 of biconvex, and the 9th lens are the negative eyeglass L9 of concave-concave; It is concavo-convex positive eyeglass L10 that offset lens group G4 has by tactic the tenth lens of object one side, and the 11 lens are the negative eyeglass L11 of convex-concave, and the 12 lens are the positive eyeglass L12 of biconvex; Relative position between variable focus lens package G2 and the offset lens group G4 changes 16 Zoom Lens of realizing focal length 6-96mm, field angle 2W=56.8 °-3.6 °, relative aperture F=1.95, rear cut-off distance is greater than 6.8mm, optical-modulation transfer function MTF is when 60lp/mm, the center degree of modulation reaches 0.65, and the edge modulation degree reaches 0.5, and the focal length of 12 optical lenses in the optics system and refractive index and 22 radius-of-curvature thereof meet the following conditions respectively successively from object plane to image planes:
-75＜f1＜-50 1.72＜n1＜1.92 45＜R1＜65 18＜R2＜38
35＜f2＜55 1.61＜n2＜1.81 18＜R2＜38 300＜R3＜500
51＜f3＜71 1.61＜n3＜1.81 19＜R4＜29 50＜R5＜70
Diaphragm
-25＜f4＜-15 1.65＜n4＜1.85 10＜R6＜20 5＜R7＜13
-15＜f5＜-5 1.65＜n5＜1.85 -18＜R8＜-9?5.5＜R9＜16.5
7.5＜f6＜20 1.73＜n6＜1.93 5.5＜R9＜16.5 350＜R10＜550
18＜f7＜38 1.55＜n7＜1.75 35＜R11＜60 -35＜R12＜-15
16＜f8＜35 1.62＜n8＜1.82 15＜R13＜35 -30＜R14＜-20
-31＜f9＜-12 1.70＜n9＜1.90 -35＜R15＜-15 80＜R16＜130
42＜f10＜62 1.65＜n10＜1.80 -35＜R17＜-15 -30＜R18＜-10
-31＜f11＜-13?1.70＜n11＜1.90 14＜R19＜25 6.5＜R20＜12.5
9＜f12＜22 1.65＜n12＜1.85 7.5＜R21＜14.5 R22＝∞。
2. large-zoom ratio optical zoom lens according to claim 1 is characterized in that described preceding fixed lens group G1 is contained in main tube [7] front portion, fixes [7] with a preceding trim ring [1] in main tube; Described variable focus lens package G2 is contained in the preceding arrangement of mirrors tube [4] that radially is provided with three guide pins; Described back fixedly is assembled in the rear portion of main tube [7], fixes with trim ring [6] after; Described offset lens group G4 is contained in the back arrangement of mirrors tube [18] that radially is provided with three guide pins, preceding arrangement of mirrors tube [4] and back arrangement of mirrors tube [18] are contained in the main tube [7] of spirality groove, forward and backward arrangement of mirrors tube is connected with main tube by guide pin, forward and backward arrangement of mirrors tube can be slided up and down at main tube inside spin, cam [9] is adjusted in preceding adjustment cam [8] that respectively has three straight troughs and back by group before and after adjusting respectively, realize changing the relative position between variable focus lens package G2 and the offset lens group G4, thereby reach the purpose of zoom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101125982A CN101666905B (en) | 2009-09-30 | 2009-09-30 | Large-zoom ratio optical zoom lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101125982A CN101666905B (en) | 2009-09-30 | 2009-09-30 | Large-zoom ratio optical zoom lens |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101666905A CN101666905A (en) | 2010-03-10 |
| CN101666905B true CN101666905B (en) | 2011-12-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101125982A Expired - Fee Related CN101666905B (en) | 2009-09-30 | 2009-09-30 | Large-zoom ratio optical zoom lens |
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| CN (1) | CN101666905B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103197408B (en) * | 2012-11-25 | 2015-04-29 | 西南技术物理研究所 | Middle-infrared band athermal optical compensation continuous zooming optical system |
| CN103235400A (en) * | 2013-05-27 | 2013-08-07 | 嘉兴中润光学科技有限公司 | Novel 16-fold 720P corresponding zoom lens |
| CN111492292B (en) * | 2017-11-17 | 2022-04-15 | 株式会社尼康 | Variable magnification optical system and optical device |
| CN113589477B (en) * | 2021-07-12 | 2023-01-06 | 广州长步道光学科技有限公司 | Near-infrared band and visible light confocal lens and magnifying lens group |
| CN113625437B (en) * | 2021-08-05 | 2022-11-22 | 西安科佳光电科技有限公司 | Large zoom ratio high-definition continuous zooming optical system |
| CN117055201B (en) * | 2023-10-12 | 2023-12-12 | 武汉宇熠科技有限公司 | 8-time zoom security lens |
-
2009
- 2009-09-30 CN CN2009101125982A patent/CN101666905B/en not_active Expired - Fee Related
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| CN101666905A (en) | 2010-03-10 |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111214 Termination date: 20170930 |
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| CF01 | Termination of patent right due to non-payment of annual fee |