CN107479176A - A kind of five grades of zoom camera lenses of focometer - Google Patents
A kind of five grades of zoom camera lenses of focometer Download PDFInfo
- Publication number
- CN107479176A CN107479176A CN201710741356.4A CN201710741356A CN107479176A CN 107479176 A CN107479176 A CN 107479176A CN 201710741356 A CN201710741356 A CN 201710741356A CN 107479176 A CN107479176 A CN 107479176A
- Authority
- CN
- China
- Prior art keywords
- grades
- distance
- focometer
- incidence
- part iii
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B15/00—Optical objectives with means for varying the magnification
- G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
- G02B15/16—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group
- G02B15/177—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a negative front lens or group of lenses
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
Abstract
The invention discloses a kind of focometer with five grades of zoom camera lenses.The camera lens is by zoom and becomes object distance, realizes the switching between each gear, reaches the effect of zoom, including Part I, Part II, the Part III being sequentially arranged, wherein：Part I includes the first cemented doublet, and Part I is zoom group, there is provided focal power, and the switching between gear is realized by movement, reach the function of zoom；Part II includes first biconvex lens and the second cemented doublet being sequentially arranged, and Part II is compensation group, for the compensation correction aberration after gear switch；Part III includes the 3rd cemented doublet, the 4th cemented doublet and the first meniscus lens, and Part III is fixed group, for spherical aberration corrector and aberration.Present invention measurement Shot Detection scope is wide, few using eyeglass, meets the trend of following focometer automatic measurement.
Description
Technical field
The present invention relates to field of optical measuring technologies, five grades of zoom camera lenses of particularly a kind of focometer.
Background technology
Focal length is optical lens and the important parameter of optical system, is most during the assembling and adjustment of optical system
One of the parameter on basis.Focometer is a kind of for measuring optical lens or the instrument of optical system focal length, in optical lens
Production be widely used with processing industry.
Focometer usually requires to be equipped with the measurement camera lens of one group of difference enlargement ratio different operating distance, and each measures mirror
The enlargement ratio and operating distance of head are all fixed, need replacing difference to put when measuring the measured lens of different range focal length
The measurement camera lens of big multiplying power, formality is cumbersome, influences operating efficiency.And multiple measurement camera lenses are equipped with, it is necessary to use more glass
Glass material.
The content of the invention
Camera lens is measured with five grades of zooms it is an object of the invention to provide a kind of focometer, to realize a wide range of survey of focal length
Amount.
The technical solution for realizing the object of the invention is：A kind of focometer passes through change with five grades of zoom camera lenses, the camera lens
It is burnt to change simultaneously with becoming object distance, the switching between gear is realized so as to realize zoom, specifically includes the Part I being sequentially arranged
G1, Part II G2, Part III G3；
Wherein, Part I G1 is zoom group, for switching gear of the focometer with five grades of zoom camera lenses；Second
It is compensation group to divide G2, is moved for compensating the focometer with image planes of five grades of zoom camera lenses in gear switch, aberration correction；
Part III G3 is fixed group；
By focometer with the multiplying power of five grades of zoom camera lenses by turning down greatly when, then make Part I G1 towards Part III G3 move
It is dynamic；Meanwhile also moved as the Part II G2 of compensation group towards Part III G3, to compensate caused by Part I G1 movements
Aberration changes and image planes movement.
Further, described five grades are respectively：
First grade：8 times of enlargement ratios, 20mm object distances；Between Part I G1 exit facet and the Part III G3 planes of incidence
Distance be that the distance between 118.5mm, Part II G2 exit facet and the Part III G3 planes of incidence is 106mm；
Second gear：2.5 times of enlargement ratios, 50mm object distances；Part I G1 exit facet and the Part III G3 planes of incidence it
Between distance be that the distance between 47.6mm, Part II G2 exit facet and the Part III G3 planes of incidence is 34.8mm；
Third gear：1 times of enlargement ratio, 100mm object distances；Between Part I G1 exit facet and the Part III G3 planes of incidence
Distance be that the distance between 27mm, Part II G2 exit facet and the Part III G3 planes of incidence is 13.5mm；
Fourth speed：0.5 times of enlargement ratio, 300mm object distances；Part I G1 exit facet and the Part III G3 planes of incidence it
Between distance be that the distance between 21.0mm, Part II G2 exit facet and the Part III G3 planes of incidence is 8.0mm；
Fifth speed：0.16 times of enlargement ratio, 1000mm object distances；Part I G1 exit facet and the Part III G3 planes of incidence
The distance between be that the distance between 15.9mm, Part II G2 exit facet and the Part III G3 planes of incidence is 3.7mm.
Further, the Part I G1 is by the first cemented doublet L1 with negative diopter including being sequentially arranged
Form.
Further, the Part II G2 is just saturating by the first biconvex positive lens L2 being sequentially arranged and second pair of gluing
Mirror L3 is formed, and airspace is 0.5mm therebetween.
Further, the Part III G3 is negative saturating by the 3rd couple of glued negative lens L4 being sequentially arranged, the 4th pair of gluing
Mirror L5 and the first bent moon positive lens L6 is formed, airspace between the 3rd couple of glued negative lens L4, the 4th couple of glued negative lens L5
For 70.0mm, airspace is 10.2mm between the 4th couple of glued negative lens L5 and the first bent moon positive lens L6.
Compared with prior art, its remarkable advantage is the present invention：(1) with five grades of zoom camera lenses, it is possible to achieve original one group
The function of fixed enlargement ratio and the measurement camera lens of fixed operating distance；(2) focometer is when measuring the focal length of different range, no
Camera lens is measured with changing；(3) operating efficiency of focometer is improved, reduces the sum of lens number, not only facilitates motor to drive
It is dynamic, also improve the stability of system.
Brief description of the drawings
Fig. 1 is three part-structure schematic diagrams of the focometer of the present invention with five grades of zoom camera lenses.
Fig. 2 is that focometer of the present invention marks schematic diagram with the structured data of five grades of zoom camera lenses.
Fig. 3 is first mark structure schematic diagram of the focometer of the present invention with five grades of zoom camera lenses.
Fig. 4 is the second gear structural representation of five grades of zoom camera lenses of focometer of the present invention.
Fig. 5 is the third gear structural representation of five grades of zoom camera lenses of focometer of the present invention.
Fig. 6 is the fourth speed structural representation of five grades of zoom camera lenses of focometer of the present invention.
Fig. 7 is the fifth speed structural representation of five grades of zoom camera lenses of focometer of the present invention.
Fig. 8 is Part I and Part II position in transforming gear of the focometer of the present invention with five grades of zoom camera lenses
Relation schematic diagram.
Fig. 9 is the synthesis image quality evaluation figure of five grades of zoom camera lenses of focometer of the present invention, wherein (a)~(e) is respectively the
Optical transfer function curve map on one~five grade, (f) are the curvature of field and distortion schematic diagram.
Embodiment
With reference to Fig. 1~2, five grades of zoom camera lenses of focometer of the present invention, the camera lens is changed simultaneously by zoom with becoming object distance,
The switching between gear is realized so as to realize zoom, specifically include the Part I G1 being sequentially arranged, Part II G2, the 3rd
Divide G3；
Wherein, Part I G1 is zoom group, for switching gear of the focometer with five grades of zoom camera lenses；Second
It is compensation group to divide G2, is moved for compensating the focometer with image planes of five grades of zoom camera lenses in gear switch, aberration correction；
Part III G3 is fixed group；
By focometer with the multiplying power of five grades of zoom camera lenses by turning down greatly when, then make Part I G1 towards Part III G3 move
It is dynamic；Meanwhile also moved as the Part II G2 of compensation group towards Part III G3, to compensate caused by Part I G1 movements
Aberration changes and image planes movement.
Further, described five grades are respectively：
First grade：8 times of enlargement ratios, 20mm object distances；Between Part I G1 exit facet and the Part III G3 planes of incidence
Distance be that the distance between 118.5mm, Part II G2 exit facet and the Part III G3 planes of incidence is 106mm；
Second gear：2.5 times of enlargement ratios, 50mm object distances；Part I G1 exit facet and the Part III G3 planes of incidence it
Between distance be that the distance between 47.6mm, Part II G2 exit facet and the Part III G3 planes of incidence is 34.8mm；
Third gear：1 times of enlargement ratio, 100mm object distances；Between Part I G1 exit facet and the Part III G3 planes of incidence
Distance be that the distance between 27mm, Part II G2 exit facet and the Part III G3 planes of incidence is 13.5mm；
Fourth speed：0.5 times of enlargement ratio, 300mm object distances；Part I G1 exit facet and the Part III G3 planes of incidence it
Between distance be that the distance between 21.0mm, Part II G2 exit facet and the Part III G3 planes of incidence is 8.0mm；
Fifth speed：0.16 times of enlargement ratio, 1000mm object distances；Part I G1 exit facet and the Part III G3 planes of incidence
The distance between be that the distance between 15.9mm, Part II G2 exit facet and the Part III G3 planes of incidence is 3.7mm.
Further, the Part I G1 is by the first cemented doublet L1 with negative diopter including being sequentially arranged
Form.
Further, the Part II G2 is just saturating by the first biconvex positive lens L2 being sequentially arranged and second pair of gluing
Mirror L3 is formed, and airspace is 0.5mm therebetween.
Further, the Part III G3 is negative saturating by the 3rd couple of glued negative lens L4 being sequentially arranged, the 4th pair of gluing
Mirror L5 and the first bent moon positive lens L6 is formed, airspace between the 3rd couple of glued negative lens L4, the 4th couple of glued negative lens L5
For 70.0mm, airspace is 10.2mm between the 4th couple of glued negative lens L5 and the first bent moon positive lens L6.
Embodiment 1
Fig. 1 is three part-structure schematic diagrams of the focometer of the present invention with five grades of zoom camera lenses.Fig. 2 is focometer of the present invention
Schematic diagram is marked with the structured data of five grades of zoom camera lenses.As shown in Figure 1：Had by object space L0 to what imaging side L7 was once set
Part I G1, the Part II G2 with positive diopter, the Part III G3 with negative diopter of negative diopter.
Wherein, Part I G1 is zoom group, for changing the focal length of five grades of zoom camera lenses, the gear of cutaway；The
A part of G1 is made up of first couple of glued negative lens L1.Part II G2 is compensation group, by a piece of biconvex positive lens L2 and
Two couples of glued positive lens L3 are formed, its act on be used to compensating focometer with five grades of zoom camera lenses the image planes position after gear is switched
The skew put and aberration correction.Part I G1 and Part II G2 moves before Part III G3.
Specifically, when being intended to focometer with the multiplying power of five grades of zoom camera lenses by turning down greatly, then Part I G1 directions are made
Part III G3 is moved, meanwhile, Part II G2 as compensation group also moves towards Part III G3, and it is compensation that it, which is acted on,
Aberration change and image planes movement caused by a part of G1 movements.
Part III G3 is fixed group, by the 3rd couple of glued negative lens L4, the 4th couple of glued negative lens L5 and the first bent moon
Positive lens L6 is formed.Its effect is by the Scenery Imaging of object space to image planes position L7.
Fig. 3~7 are the position view of each gear of five grades of zoom camera lenses,
Fig. 3 is first grade：8 times of enlargement ratios, 20mm object distances；Part I G1 exit facet and the Part III G3 planes of incidence
The distance between be that the distance between 118.5mm, Part II G2 exit facet and the Part III G3 planes of incidence is 106mm；
Fig. 4 is second gear：2.5 times of enlargement ratios, 50mm object distances；Part I G1 exit facet and Part III G3 is incident
The distance between face is that the distance between 47.6mm, Part II G2 exit facet and the Part III G3 planes of incidence is 34.8mm；
Fig. 5 is third gear：1 times of enlargement ratio, 100mm object distances；Part I G1 exit facet and Part III G3 is incident
The distance between face is that the distance between 27mm, Part II G2 exit facet and the Part III G3 planes of incidence is 13.5mm；
Fig. 6 is fourth speed：0.5 times of enlargement ratio, 300mm object distances；Part I G1 exit facet and Part III G3 enters
It is that the distance between 21.0mm, Part II G2 exit facet and the Part III G3 planes of incidence is 8.0mm to penetrate the distance between face；
Fig. 7 is fifth speed：0.16 times of enlargement ratio, 1000mm object distances；Part I G1 exit facet and Part III G3
The distance between plane of incidence is that the distance between 15.9mm, Part II G2 exit facet and the Part III G3 planes of incidence is
3.7mm。
Two curves depict five grades of conversion processes of the camera lens in Fig. 8.Five gears of the camera lens are depicted in figure
When Part I G1 and Part II G2 position relationship.During the camera lens realizes five grades of zooms by zoom, first
Point G1 and Part II G2 in moving process all the time distance away.During whole zoom, five grades of zooms
Part I G1 last one side and the minimum air thickness in Part I G1 the first face are 0.7mm in camera lens, are not in
Two groups of situations about mutually encountering.In addition, the displacement of whole mobile group is close to 100mm, therefore abandons traditional zoom
Cam structure, moved using line slideway.If line slideway adds motor control in the later stage, it is possible to achieve self shifter.
The focometer of the present invention has good image quality with five grades of zoom camera lenses, with reference to Fig. 9 (a)~(f), at five
Optical transfer function (MTF) on gear has all reached 30 lines to the above, and close to diffraction limit, and its distortion and the curvature of field are all
Meet demand.The measurement camera lens of existing one group of difference enlargement ratio different operating distance can be replaced, there is application well
Demand.
Claims (5)
1. five grades of zoom camera lenses of a kind of focometer, it is characterised in that the camera lens is changed simultaneously by zoom with becoming object distance, is realized
Switching between gear so as to realize zoom, specifically include the Part I (G1) being sequentially arranged, Part II (G2), the 3rd
Divide (G3)；
Wherein, Part I (G1) is zoom group, for switching gear of the focometer with five grades of zoom camera lenses；Part II
(G2) it is compensation group, is moved for compensating the focometer with image planes of five grades of zoom camera lenses in gear switch, aberration correction；
Part III (G3) is fixed group；
By focometer with the multiplying power of five grades of zoom camera lenses by turning down greatly when, then make Part I (G1) towards Part III (G3) move
It is dynamic；Meanwhile it is also mobile towards Part III (G3) as the Part II (G2) of compensation group, it is mobile to compensate Part I (G1)
Caused aberration change and image planes movement.
2. five grades of zoom camera lenses of focometer according to claim 1, it is characterised in that described five grades are respectively：
First grade：8 times of enlargement ratios, 20mm object distances；Between the exit facet and Part III (G3) plane of incidence of Part I (G1)
Distance be that the distance between 118.5mm, the exit facet and Part III (G3) plane of incidence of Part II (G2) is 106mm；
Second gear：2.5 times of enlargement ratios, 50mm object distances；The exit facet and Part III (G3) plane of incidence of Part I (G1) it
Between distance be that the distance between 47.6mm, the exit facet and Part III (G3) plane of incidence of Part II (G2) is 34.8mm；
Third gear：1 times of enlargement ratio, 100mm object distances；Between the exit facet and Part III (G3) plane of incidence of Part I (G1)
Distance be that the distance between 27mm, the exit facet and Part III (G3) plane of incidence of Part II (G2) is 13.5mm；
Fourth speed：0.5 times of enlargement ratio, 300mm object distances；The exit facet and Part III (G3) plane of incidence of Part I (G1) it
Between distance be that the distance between 21.0mm, the exit facet and Part III (G3) plane of incidence of Part II (G2) is 8.0mm；
Fifth speed：0.16 times of enlargement ratio, 1000mm object distances；The exit facet and Part III (G3) plane of incidence of Part I (G1)
The distance between be that the distance between 15.9mm, the exit facet and Part III (G3) plane of incidence of Part II (G2) is 3.7mm.
3. five grades of zoom camera lenses of focometer according to claim 2, it is characterised in that the Part I (G1) is by wrapping
First cemented doublet (L1) with negative diopter being sequentially arranged is included to form.
4. five grades of zoom camera lenses of focometer according to claim 2, it is characterised in that the Part II (G2) is by suitable
The first biconvex positive lens (L2) of secondary setting and second pair of glued positive lens (L3) are formed, and airspace is therebetween
0.5mm。
5. five grades of zoom camera lenses of focometer according to claim 2, it is characterised in that the Part III (G3) is by suitable
The 3rd pair of glued negative lens (L4), the 4th pair of glued negative lens (L5) and the first bent moon positive lens (L6) of secondary setting are formed, the
Airspace is 70.0mm between three pairs of glued negative lenses (L4), the 4th pair of glued negative lens (L5), the 4th pair of glued negative lens
(L5) airspace is 10.2mm between the first bent moon positive lens (L6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710741356.4A CN107479176B (en) | 2017-08-25 | 2017-08-25 | Five-gear zoom lens for focal length instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710741356.4A CN107479176B (en) | 2017-08-25 | 2017-08-25 | Five-gear zoom lens for focal length instrument |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107479176A true CN107479176A (en) | 2017-12-15 |
| CN107479176B CN107479176B (en) | 2020-01-24 |
Family
ID=60602405
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710741356.4A Expired - Fee Related CN107479176B (en) | 2017-08-25 | 2017-08-25 | Five-gear zoom lens for focal length instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107479176B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2452036Y (en) * | 2000-12-08 | 2001-10-03 | 中国科学院长春光学精密机械与物理研究所 | Zoom lens of optical compensation |
| CN1673796A (en) * | 2004-03-23 | 2005-09-28 | 富士能株式会社 | A zoom lens including adjoining lens |
| US20060082900A1 (en) * | 2004-10-19 | 2006-04-20 | Canon Kabushiki Kaisha | Zoom lens and imaging apparatus having the same |
| JP2011257625A (en) * | 2010-06-10 | 2011-12-22 | Nitto Kogaku Kk | Lens system |
| CN203259708U (en) * | 2012-12-28 | 2013-10-30 | 利达光电股份有限公司 | Large zoom ratio continuous zooming projection lens |
| CN106342261B (en) * | 2010-09-03 | 2014-02-05 | 中国航空工业集团公司洛阳电光设备研究所 | A kind of infrared variable focal length optical system |
-
2017
- 2017-08-25 CN CN201710741356.4A patent/CN107479176B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2452036Y (en) * | 2000-12-08 | 2001-10-03 | 中国科学院长春光学精密机械与物理研究所 | Zoom lens of optical compensation |
| CN1673796A (en) * | 2004-03-23 | 2005-09-28 | 富士能株式会社 | A zoom lens including adjoining lens |
| US20060082900A1 (en) * | 2004-10-19 | 2006-04-20 | Canon Kabushiki Kaisha | Zoom lens and imaging apparatus having the same |
| JP2011257625A (en) * | 2010-06-10 | 2011-12-22 | Nitto Kogaku Kk | Lens system |
| CN106342261B (en) * | 2010-09-03 | 2014-02-05 | 中国航空工业集团公司洛阳电光设备研究所 | A kind of infrared variable focal length optical system |
| CN203259708U (en) * | 2012-12-28 | 2013-10-30 | 利达光电股份有限公司 | Large zoom ratio continuous zooming projection lens |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107479176B (en) | 2020-01-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103901588B (en) | Zoom lens and camera head | |
| CN109164559B (en) | Large-numerical aperture near-infrared object image bilateral telecentric optical system | |
| CN101382645B (en) | Zoom lens system and image pickup device containing above system | |
| CN109557641B (en) | Double telecentric projection lithography lens | |
| CN107957622B (en) | Large aperture and large image plane tele zoom lens | |
| CN202281857U (en) | Double telecentric lens | |
| CN104965297A (en) | Rear group adjusting video shooting high-definition zoom lens and rear group adjusting method for lens | |
| CN109061856A (en) | The adjustable imaging lens of object space and image space doubly telecentric | |
| CN104570301A (en) | Constant-aperture wide-angle varifocus objective | |
| CN111273428A (en) | Large-target-surface high-precision industrial fixed-focus lens | |
| CN104620150A (en) | Zoom lens system and electronic imaging device provided with same | |
| CN108051905B (en) | Imaging lens and photographing device | |
| CN105259645A (en) | Large-view field distortionless scaling objective lens | |
| TW201743102A (en) | An optical system and an optical lens thereof | |
| CN209132501U (en) | A kind of doubly telecentric projection lithography camera lens | |
| CN109633874B (en) | Telecentric lens | |
| CN113866965B (en) | Oblique image telecentric lens with high precision and large depth of field | |
| CN105527701A (en) | Wide-field projection lithography objective lens | |
| CN211180376U (en) | Large-target-surface continuous zoom telecentric lens | |
| CN107479176A (en) | A kind of five grades of zoom camera lenses of focometer | |
| CN111399198A (en) | Double-telecentric lens | |
| CN108205189B (en) | Microspur varifocal optical system | |
| CN110850567A (en) | Large-target-surface continuous zoom telecentric lens | |
| CN207833095U (en) | A kind of focal length zoom lens of the big image planes of large aperture | |
| CN114895440B (en) | Optical imaging system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200124 Termination date: 20210825 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |