JPS5677826A - Focal plate - Google Patents
Focal plateInfo
- Publication number
- JPS5677826A JPS5677826A JP15472779A JP15472779A JPS5677826A JP S5677826 A JPS5677826 A JP S5677826A JP 15472779 A JP15472779 A JP 15472779A JP 15472779 A JP15472779 A JP 15472779A JP S5677826 A JPS5677826 A JP S5677826A
- Authority
- JP
- Japan
- Prior art keywords
- focal plate
- parts
- complementary
- optical axis
- constitution
- 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
Landscapes
- Viewfinders (AREA)
- Diffracting Gratings Or Hologram Optical Elements (AREA)
Abstract
PURPOSE: To obtain a focal plate of high precision that facilitates focusing, by forming a double image with different colors by use of a focal plate of diffraction lattice constitution in which an optically asymmetric structure is formed periodically.
CONSTITUTION: The focal plate is made of trnasparent member 24 for the cover, adhesive layer 19 differing in refractive index from substrate 17, complementary- color filter 18 composed of orange and blue filter parts 20 and 21 obtained by vapor- depositing coloring matter on relief circuit diffraction parts, base board 17 whose surface forms relief circuit lattices, etc., in the phase diffraction lattice structure. Therefore, beams 22 and 23, parts of incident luminous flux, parallel to the optical axis pass through filter part 21 and 20 and are projected symmetrically on the optical axis at angle θ according to the relief structure to form a double image in different colors depending upon a combination of color filters, so that the focal plate facilitates high-precision focusing through complementary-color filter parts 21 and 20 can be obtained.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15472779A JPS5677826A (en) | 1979-11-29 | 1979-11-29 | Focal plate |
| US06/209,491 US4336989A (en) | 1979-11-29 | 1980-11-24 | Focusing screen |
| DE3044934A DE3044934C2 (en) | 1979-11-29 | 1980-11-28 | Shim |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15472779A JPS5677826A (en) | 1979-11-29 | 1979-11-29 | Focal plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5677826A true JPS5677826A (en) | 1981-06-26 |
Family
ID=15590625
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15472779A Pending JPS5677826A (en) | 1979-11-29 | 1979-11-29 | Focal plate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5677826A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58186718A (en) * | 1982-04-15 | 1983-10-31 | エヌ・ベ−・フイリツプス・フル−イランペンフアブリケン | Light wavelength processing device |
| JPH01198716A (en) * | 1987-10-08 | 1989-08-10 | Kollmorgen Technol Corp | Low reflection optical focal plate and making thereof |
| EP0750207A2 (en) * | 1995-06-19 | 1996-12-27 | Eastman Kodak Company | Color separating diffractive optical array and image sensor |
-
1979
- 1979-11-29 JP JP15472779A patent/JPS5677826A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58186718A (en) * | 1982-04-15 | 1983-10-31 | エヌ・ベ−・フイリツプス・フル−イランペンフアブリケン | Light wavelength processing device |
| JPH01198716A (en) * | 1987-10-08 | 1989-08-10 | Kollmorgen Technol Corp | Low reflection optical focal plate and making thereof |
| EP0750207A2 (en) * | 1995-06-19 | 1996-12-27 | Eastman Kodak Company | Color separating diffractive optical array and image sensor |
| EP0750207A3 (en) * | 1995-06-19 | 1998-02-25 | Eastman Kodak Company | Color separating diffractive optical array and image sensor |
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