CN202548427U - Zooming projection lens - Google Patents
Zooming projection lens Download PDFInfo
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- CN202548427U CN202548427U CN2012200539920U CN201220053992U CN202548427U CN 202548427 U CN202548427 U CN 202548427U CN 2012200539920 U CN2012200539920 U CN 2012200539920U CN 201220053992 U CN201220053992 U CN 201220053992U CN 202548427 U CN202548427 U CN 202548427U
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Abstract
The utility model discloses a zooming projection lens. The zooming projection lens sequentially comprises a front fixed lens group E1, two movable lens groups E2 and E3 and a compensatory lens group E4 from a screen side to an image surface side along an optical axis. The short focus and long focus are switched through movement of the two movable lens groups E2 and E3 in the whole system, the compensatory lens group E4 is adjusted for focusing, the lens is an asynchronous zooming system; and the ratio between the longest focal length and the shortest focal length is between 8.8 and 9.2. The surfaces of all lenses in the projection lens are spherical, the conventional environment-friendly optical materials are used on the premise of guaranteeing the optical quality, the production efficiency is improved, and the cost is reduced.
Description
Technical field
The utility model relates to the optical image technology field, is specifically related to a kind of Zooming-projection camera lens that is applicable to projection field.
Background technology
In recent years, projector is by being applied in the daily life more and more at large, especially by practicality in less the influencing on the equipment of volume ratio, like laptop computer etc., to satisfy specific use needs.Lead the DLP projection display technique of one of market mainstream technology to develop in recent years rapidly at present, its development trend mainly shows aspects such as short projector distance, giant-screen, high definition, high brightness.The core component of DLP technology is a DMD digital picture chip; Its image-forming principle is by the rotation of DMD micro-mirror device (± 10 °) control reflection of light direction; Control the break-make of this signal, and then the light signal on the DMD micro-mirror device is projected on the screen through optical lens.
At present, in order to adapt to the projection demand of diversification, satisfy the projection needs of various occasions, various projector distances, a lot of projectors all have been equipped with Zooming-projection camera lens.But these Zooming-projection camera lens zoom ratios are all smaller, below 5 times.And for effective aberration correction, realize reasonable optical property, usually need introduce the optical material of the high index of refraction of non-spherical lens or import.But non-spherical lens to processing and matching requirements than higher, be unfavorable for enhancing productivity, also be difficult to reduce cost of products.Import high index of refraction optical material costs an arm and a leg, and manufacturability is poor, can't satisfy the technological requirement of production in enormous quantities.
The utility model content
The purpose of the utility model is to provide a kind of zoom ratio to reach 9 times Zooming-projection camera lens.This camera lens under the situation of not using non-spherical lens and expensive import optical material, the Zooming-projection camera lens that through the optimal combination of optical lens, provide that a kind of zoom ratio is big, compact conformation, cost are low, is fit to batch production requirements.
The technical scheme of the utility model realizes through following measure:
A kind of Zooming-projection camera lens; Comprise a preceding fixed lens group E1, the first mobile lens group E2, the second mobile lens group E3 and an offset lens group E4; To picture planar side series arrangement, it is characterized in that: the longest focal length of said camera lens and the ratio of shortest focal length are between 8.8 to 9.2 along optical axis from screen side for said four lens combination;
Said lens combination satisfies following relational expression:
5.5<∣f1/>fw∣<6.5?(1)
1<∣f2/>fw∣<2(2)
3<∣f3/>fw∣<4(3)
2<∣f4/>fw∣<3(4)
In above-mentioned relation formula (1) ~ (4), f1, f2, f3, f4 are respectively the focal lengths of preceding fixation group E1, the one or two mobile lens group E2, E3 and offset lens group E4, and fw is the shortest focal length of said Zooming-projection camera lens.
Fixed lens group E1 comprises the 1st positive lens, the 1st negative lens, the 2nd positive lens and the 2nd negative lens along optical axis from screen side to the image planes side successively before said, and said the 1st negative lens and the 2nd positive lens gummed is formed the gummed part, and the focal length of preceding fixed lens group is for just; The said first mobile lens group E2 comprises the 3rd negative lens, the 4th negative lens and the 3rd positive lens, and said the 4th negative lens and the 3rd positive lens gummed are formed the gummed part, and the focal length of the first mobile lens group E2 is for negative; The said second mobile lens group E3 comprises the 4th positive lens, the 5th negative lens, the 5th positive lens and the 6th positive lens, and said the 4th positive lens and the 5th negative lens gummed is formed the gummed part, and the focal length of the second mobile lens group E3 is for just; Said offset lens group E4 comprises the 6th negative lens, the 7th positive lens and the 8th positive lens, and said the 6th negative lens and the 7th positive lens gummed is formed the gummed part, and the focal length of offset lens group E4 is for just.
Four lens before said among the fixed lens group E1 all are protruding in object space, recessed meniscus shaped lens to picture side; The 3rd, 4 negative lenses are double concave lens among the said first mobile lens group E2, and the 3rd positive lens is protruding in object space, recessed meniscus shaped lens to picture side; The 4th positive lens and the 5th positive lens are lenticular lens among the said second mobile lens group E3, and the 5th negative lens is the double concave lens, and the 6th positive lens is protruding in object space, recessed meniscus shaped lens to picture side; The 6th negative lens is protruding in object space, recessed meniscus shaped lens to picture side among the said offset lens group E4, and the 7th positive lens and the 8th positive lens are lenticular lens.
Fixation group E1, the one or two mobile lens group E2, E3 and the employed lens of offset lens group E4 all adopt conventional eco-friendly glass material before said, and all lens surfaces all are spheres.
The diaphragm of said lens optical system is between the first mobile lens group E2 and the second mobile lens group E3, and the diaphragm bore remains unchanged, and move with mobile lens group E3 the stop position.
The F number of said camera lens is less than 1.8.
The advantage of the utility model is:
The stationkeeping of preceding fixed lens group E1 is constant, and total system moves through two mobile lens group E2, E3 carries out zoom, realizes the conversion between short burnt and long Jiao of camera lens, realizes focusing on through adjusting offset lens group E4, and zoom ratio reaches 9 times.Do not use non-spherical lens and expensive import high-index material,, realize bigger zoom ratio through the optimal combination of optical system.On the basis that guarantees image quality, all adopt conventional eco-friendly optical material, help reducing system cost, improve the efficient of producing in batches.The utility model also has advantages such as compact conformation, assembly process process is good, projected image is clear.
Description of drawings
Below in conjunction with accompanying drawing the specific embodiment of the utility model is done further detailed explanation.
Fig. 1 is the burnt position view of the weak point of the utility model Zooming-projection camera lens.
Fig. 2 is the burnt position view of the length of the utility model Zooming-projection camera lens.
Fig. 3 is the burnt curvature of field of the weak point of the utility model Zooming-projection camera lens and distortion curve figure.
Fig. 4 is the burnt curvature of field of the length of the utility model Zooming-projection camera lens and distortion curve figure.
Fig. 5 is the burnt longitudinal aberration curve map of the weak point of the utility model Zooming-projection camera lens.
Fig. 6 is the burnt longitudinal aberration curve map of the length of the utility model Zooming-projection camera lens.
Embodiment
Referring to Fig. 1, Fig. 2, the utility model Zooming-projection camera lens comprises preceding fixed lens group E1, the first mobile lens group E2 with negative power with positive light coke successively from screen side to the image planes side, have the second mobile lens group E3 of positive light coke and have the offset lens group E4 of positive light coke.
Fixed lens group E1 comprises the 1st positive lens L1, the 1st negative lens L2, the 2nd positive lens L3 and the 2nd negative lens L4 along optical axis from screen side to the image planes side successively before said; Four lens L1, L2, L3, L4 are protruding in object space, recessed meniscus shaped lens to picture side; The said the 1st negative L2 and the 2nd positive lens L3 gummed is formed the gummed part, and the focal length of preceding fixed lens group E1 is for just.
The said first mobile lens group E2 comprises the 3rd negative lens L5, the 4th negative lens L6 and the 3rd positive lens L7, and said the 4th negative lens L6 and the 3rd positive lens L7 gummed are formed the gummed part, and the focal length of the first mobile lens group E2 is for negative; Wherein the 3rd, 4 negative lenses are double concave lens, and the 3rd positive lens L7 is protruding in object space, recessed meniscus shaped lens to picture side.
The said second mobile lens group E3 comprises the 4th positive lens L8, the 5th negative lens L9, the 5th positive lens L10 and the 6th positive lens L11, and said the 4th positive lens L8 and the 5th negative lens L9 gummed is formed the gummed part, and the focal length of the second mobile lens group E3 is for just; Said wherein the 4th positive lens L8 and the 5th positive lens L10 are lenticular lens, and the 5th negative lens L9 is the double concave lens, and the 6th positive lens L11 is protruding in object space, recessed meniscus shaped lens to picture side.
Said offset lens group E4 comprises the 6th negative lens L12, the 7th positive lens L13 and the 8th positive lens L14, and said the 6th negative lens L12 and the 7th positive lens L13 gummed is formed the gummed part, and the focal length of offset lens group E4 is for just; Wherein the 6th negative lens L12 is protruding in object space, recessed meniscus shaped lens to picture side, and the 7th positive lens L13 and the 8th positive lens L14 are lenticular lens.
During this Zooming-projection camera lens work, the stationkeeping of preceding fixed lens group E1 is constant, and total system moves through two mobile lens group E2, E3 carries out zoom, realizes the conversion between short burnt and long Jiao of camera lens, and E4 realizes focusing on through adjustment offset lens group.Lens focus is changed to: 35.2mm (short burnt) ~ 176.0mm (centre) ~ 316.0mm (long burnt).The F number is changed to: 1.38 (short burnt) ~ 1.6 (centre) ~ 1.6 (long burnt).
The focal length of wherein preceding fixed lens group E1, two mobile lens group E2, E3 and offset lens group E4 is respectively:
f1=215.8mm，f2=-37.6mm，f3=124.5mm，f4=75.5mm。
∣f1/fw∣=6.13,?∣f2/fw∣=1.07，∣f3/fw∣=3.5，∣f4/fw∣=2.1。Satisfy relational expression (1) ~ (4).
System stop is located between mobile lens group E2 and the mobile lens group E3, and near mobile lens group E3, the diaphragm bore is constant, and move with mobile lens group E3 the position.
The structural parameters of the utility model Zooming-projection camera lens embodiment are shown in table 1, table 2.Accompanying drawing 3 is the curvature of field and the distortion curve figure under the burnt state of weak point of the utility model Zooming-projection camera lens embodiment; Accompanying drawing 4 is the curvature of field and the distortion curve figure under the burnt state of length of the utility model Zooming-projection camera lens embodiment; Accompanying drawing 5 is the longitudinal aberration curve maps under the burnt state of weak point of the utility model Zooming-projection camera lens embodiment; Accompanying drawing 6 is the longitudinal aberration curve maps under the burnt state of length of the utility model Zooming-projection camera lens embodiment.
Table 1
Table 2
Claims (6)
1. Zooming-projection camera lens; Comprise a preceding fixed lens group E1, the first mobile lens group E2, the second mobile lens group E3 and an offset lens group E4; To picture planar side series arrangement, it is characterized in that: the longest focal length of said camera lens and the ratio of shortest focal length are between 8.8 to 9.2 along optical axis from screen side for said four lens combination;
Said lens combination satisfies following relational expression:
5.5<∣f1/>fw∣<6.5?(1)
1<∣f2/>fw∣<2(2)
3<∣f3/>fw∣<4(3)
2<∣f4/>fw∣<3(4)
In above-mentioned relation formula (1) ~ (4), f1, f2, f3, f4 are respectively the focal lengths of preceding fixation group E1, the one or two mobile lens group E2, E3 and offset lens group E4, and fw is the shortest focal length of said Zooming-projection camera lens.
2. Zooming-projection camera lens according to claim 1; It is characterized in that: fixed lens group E1 comprises the 1st positive lens, the 1st negative lens, the 2nd positive lens and the 2nd negative lens along optical axis from screen side to the image planes side successively before said; Said the 1st negative lens and the 2nd positive lens gummed is formed the gummed part, and the focal length of preceding fixed lens group is for just; The said first mobile lens group E2 comprises the 3rd negative lens, the 4th negative lens and the 3rd positive lens, and said the 4th negative lens and the 3rd positive lens gummed are formed the gummed part, and the focal length of the first mobile lens group E2 is for negative; The said second mobile lens group E3 comprises the 4th positive lens, the 5th negative lens, the 5th positive lens and the 6th positive lens, and said the 4th positive lens and the 5th negative lens gummed is formed the gummed part, and the focal length of the second mobile lens group E3 is for just; Said offset lens group E4 comprises the 6th negative lens, the 7th positive lens and the 8th positive lens, and said the 6th negative lens and the 7th positive lens gummed is formed the gummed part, and the focal length of offset lens group E4 is for just.
3. Zooming-projection camera lens according to claim 2 is characterized in that: four lens before said among the fixed lens group E1 all are protruding in object space, recessed meniscus shaped lens to picture side; The 3rd, 4 negative lenses are double concave lens among the said first mobile lens group E2, and the 3rd positive lens is protruding in object space, recessed meniscus shaped lens to picture side; The 4th positive lens and the 5th positive lens are lenticular lens among the said second mobile lens group E3, and the 5th negative lens is the double concave lens, and the 6th positive lens is protruding in object space, recessed meniscus shaped lens to picture side; The 6th negative lens is protruding in object space, recessed meniscus shaped lens to picture side among the said offset lens group E4, and the 7th positive lens and the 8th positive lens are lenticular lens.
4. Zooming-projection camera lens according to claim 1; It is characterized in that: fixation group E1, the one or two mobile lens group E2, E3 and the employed lens of offset lens group E4 all adopt conventional eco-friendly glass material before said, and all lens surfaces all are spheres.
5. Zooming-projection camera lens according to claim 1 is characterized in that: the diaphragm of said lens optical system is between the first mobile lens group E2 and the second mobile lens group E3, and the diaphragm bore remains unchanged, and move with mobile lens group E3 the stop position.
6. Zooming-projection camera lens according to claim 1 is characterized in that: the F number of said camera lens is less than 1.8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200539920U CN202548427U (en) | 2012-02-20 | 2012-02-20 | Zooming projection lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200539920U CN202548427U (en) | 2012-02-20 | 2012-02-20 | Zooming projection lens |
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| Publication Number | Publication Date |
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| CN202548427U true CN202548427U (en) | 2012-11-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012200539920U Expired - Fee Related CN202548427U (en) | 2012-02-20 | 2012-02-20 | Zooming projection lens |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105334684A (en) * | 2014-08-06 | 2016-02-17 | 林伊柔 | Projector and projection lens thereof |
| CN105829942A (en) * | 2014-04-15 | 2016-08-03 | 株式会社光学逻辑 | Image capture lens |
| CN106556923A (en) * | 2015-09-24 | 2017-04-05 | 奥林巴斯株式会社 | Zoom lens and the camera head with the zoom lens |
| JP2017156741A (en) * | 2016-02-29 | 2017-09-07 | リコーイメージング株式会社 | Zoom lens system |
| WO2020063842A1 (en) * | 2018-09-28 | 2020-04-02 | 中国兵器工业标准化研究所 | Optical testing system combining projection and schlieren techniques |
-
2012
- 2012-02-20 CN CN2012200539920U patent/CN202548427U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105829942A (en) * | 2014-04-15 | 2016-08-03 | 株式会社光学逻辑 | Image capture lens |
| CN105334684A (en) * | 2014-08-06 | 2016-02-17 | 林伊柔 | Projector and projection lens thereof |
| CN105334684B (en) * | 2014-08-06 | 2017-06-27 | 林伊柔 | Projector and its projection lens |
| CN106556923A (en) * | 2015-09-24 | 2017-04-05 | 奥林巴斯株式会社 | Zoom lens and the camera head with the zoom lens |
| JP2017156741A (en) * | 2016-02-29 | 2017-09-07 | リコーイメージング株式会社 | Zoom lens system |
| WO2020063842A1 (en) * | 2018-09-28 | 2020-04-02 | 中国兵器工业标准化研究所 | Optical testing system combining projection and schlieren techniques |
| US10962488B2 (en) | 2018-09-28 | 2021-03-30 | China North Standardization Center | Integrated projection-schlieren optical system |
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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: 20121121 Termination date: 20200220 |
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| CF01 | Termination of patent right due to non-payment of annual fee |