JPS57161841A - Focusing glass - Google Patents
Focusing glassInfo
- Publication number
- JPS57161841A JPS57161841A JP4761781A JP4761781A JPS57161841A JP S57161841 A JPS57161841 A JP S57161841A JP 4761781 A JP4761781 A JP 4761781A JP 4761781 A JP4761781 A JP 4761781A JP S57161841 A JPS57161841 A JP S57161841A
- Authority
- JP
- Japan
- Prior art keywords
- grating
- lens
- image
- focusing glass
- circumference
- 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
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS 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
- G03B13/00—Viewfinders; Focusing aids for cameras; Means for focusing for cameras; Autofocus systems for cameras
- G03B13/18—Focusing aids
- G03B13/24—Focusing screens
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4761781A JPS57161841A (en) | 1981-03-31 | 1981-03-31 | Focusing glass |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4761781A JPS57161841A (en) | 1981-03-31 | 1981-03-31 | Focusing glass |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57161841A true JPS57161841A (en) | 1982-10-05 |
Family
ID=12780174
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4761781A Pending JPS57161841A (en) | 1981-03-31 | 1981-03-31 | Focusing glass |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57161841A (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1990002963A1 (en) * | 1988-09-12 | 1990-03-22 | Johnson Kenneth C | Dispersion-compensating diffraction grating |
US5058981A (en) * | 1988-12-05 | 1991-10-22 | Sumitomo Electric Industries, Ltd. | Light source device |
US5161057A (en) * | 1988-09-12 | 1992-11-03 | Johnson Kenneth C | Dispersion-compensated fresnel lens |
-
1981
- 1981-03-31 JP JP4761781A patent/JPS57161841A/ja active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1990002963A1 (en) * | 1988-09-12 | 1990-03-22 | Johnson Kenneth C | Dispersion-compensating diffraction grating |
US5161057A (en) * | 1988-09-12 | 1992-11-03 | Johnson Kenneth C | Dispersion-compensated fresnel lens |
US5058981A (en) * | 1988-12-05 | 1991-10-22 | Sumitomo Electric Industries, Ltd. | Light source device |
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