JPS6472112A - Refraction type projection lens - Google Patents
Refraction type projection lensInfo
- Publication number
- JPS6472112A JPS6472112A JP22934687A JP22934687A JPS6472112A JP S6472112 A JPS6472112 A JP S6472112A JP 22934687 A JP22934687 A JP 22934687A JP 22934687 A JP22934687 A JP 22934687A JP S6472112 A JPS6472112 A JP S6472112A
- Authority
- JP
- Japan
- Prior art keywords
- lens
- lenses
- plastic
- glass
- screen side
- 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.)
- Pending
Links
Abstract
PURPOSE:To obtain a wide-angle, lightweight projection lens by composing the refraction type projection lens of plastic lenses and glass lenses in combination, giving the glass lenses main power lens, and composing the 3rd lens and 4th lens of plastic cemented lenses. CONSTITUTION:The projection lens consists of the plastic lenses and glass lenses in combination, i.e. a negative plastic lens as a 1st lens 1 having its convex surface on a screen side, a positive glass lens as a 2nd lens having its large-curvature convex surface on the screen side, a negative plastic cemented lens consisting of a 3rd lens 3 and a 4th lens 4, a biconvex glass lens as a 5th lens, and a negative plastic lens as a 6th lens 6 having its large- curvature concave surface on the screen side in order from the screen side. Then the chromatic aberration of the projection lens is compensated by the cemented lens consisting of the 3rd lens 3 and 4th lens 4 and focus movement due to variation in the ambient temperature of the projection lens is compensated principally by the 2nd lens 2 and 5th lens 5. Consequently, the view angle is increased and the weight is reduced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22934687A JPS6472112A (en) | 1987-09-12 | 1987-09-12 | Refraction type projection lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22934687A JPS6472112A (en) | 1987-09-12 | 1987-09-12 | Refraction type projection lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6472112A true JPS6472112A (en) | 1989-03-17 |
Family
ID=16890724
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22934687A Pending JPS6472112A (en) | 1987-09-12 | 1987-09-12 | Refraction type projection lens |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6472112A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0267512A (en) * | 1988-09-02 | 1990-03-07 | Konica Corp | Projection lens for projector |
| JP2009216858A (en) * | 2008-03-10 | 2009-09-24 | Fujinon Corp | Imaging lens and imaging apparatus |
| JP2014106438A (en) * | 2012-11-29 | 2014-06-09 | Ricoh Co Ltd | Image reading lens, image reading apparatus, and image forming apparatus |
| WO2014155464A1 (en) * | 2013-03-27 | 2014-10-02 | 富士フイルム株式会社 | Imaging lens and imaging device |
| JP2015125150A (en) * | 2013-12-25 | 2015-07-06 | 富士フイルム株式会社 | Image-capturing lens and image-capturing device |
| US10254516B2 (en) | 2016-08-22 | 2019-04-09 | Largan Precision Co., Ltd. | Optical imaging system, imaging apparatus and electronic device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58139111A (en) * | 1982-02-12 | 1983-08-18 | Minolta Camera Co Ltd | Refraction type optical system for video projector |
| JPS61133915A (en) * | 1984-12-05 | 1986-06-21 | Matsushita Electric Ind Co Ltd | Projection lens |
| JPS61248013A (en) * | 1985-04-26 | 1986-11-05 | Konishiroku Photo Ind Co Ltd | Projection lens for television projector |
-
1987
- 1987-09-12 JP JP22934687A patent/JPS6472112A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58139111A (en) * | 1982-02-12 | 1983-08-18 | Minolta Camera Co Ltd | Refraction type optical system for video projector |
| JPS61133915A (en) * | 1984-12-05 | 1986-06-21 | Matsushita Electric Ind Co Ltd | Projection lens |
| JPS61248013A (en) * | 1985-04-26 | 1986-11-05 | Konishiroku Photo Ind Co Ltd | Projection lens for television projector |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0267512A (en) * | 1988-09-02 | 1990-03-07 | Konica Corp | Projection lens for projector |
| JP2009216858A (en) * | 2008-03-10 | 2009-09-24 | Fujinon Corp | Imaging lens and imaging apparatus |
| JP2014106438A (en) * | 2012-11-29 | 2014-06-09 | Ricoh Co Ltd | Image reading lens, image reading apparatus, and image forming apparatus |
| WO2014155464A1 (en) * | 2013-03-27 | 2014-10-02 | 富士フイルム株式会社 | Imaging lens and imaging device |
| CN105143948A (en) * | 2013-03-27 | 2015-12-09 | 富士胶片株式会社 | Imaging lens and imaging device |
| JP5869727B2 (en) * | 2013-03-27 | 2016-02-24 | 富士フイルム株式会社 | Imaging lens and imaging apparatus |
| JPWO2014155464A1 (en) * | 2013-03-27 | 2017-02-16 | 富士フイルム株式会社 | Imaging lens and imaging apparatus |
| US9632288B2 (en) | 2013-03-27 | 2017-04-25 | Fujifilm Corporation | Imaging lens and imaging apparatus |
| JP2015125150A (en) * | 2013-12-25 | 2015-07-06 | 富士フイルム株式会社 | Image-capturing lens and image-capturing device |
| US10254516B2 (en) | 2016-08-22 | 2019-04-09 | Largan Precision Co., Ltd. | Optical imaging system, imaging apparatus and electronic device |
| US10746968B2 (en) | 2016-08-22 | 2020-08-18 | Largan Precision Co., Ltd. | Optical imaging system, imaging apparatus and electronic device |
| US11789244B2 (en) | 2016-08-22 | 2023-10-17 | Largan Precision Co., Ltd. | Optical imaging system, imaging apparatus and electronic device |
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