JPS5548724A - Optical low-pass filter - Google Patents
Optical low-pass filterInfo
- Publication number
- JPS5548724A JPS5548724A JP12174478A JP12174478A JPS5548724A JP S5548724 A JPS5548724 A JP S5548724A JP 12174478 A JP12174478 A JP 12174478A JP 12174478 A JP12174478 A JP 12174478A JP S5548724 A JPS5548724 A JP S5548724A
- Authority
- JP
- Japan
- Prior art keywords
- diffraction grating
- diffraction
- diffracted light
- pass filter
- transparent member
- 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
- Color Television Image Signal Generators (AREA)
Abstract
PURPOSE: To lower cost and enhance performance by using the diffraction grating having such diffraction characteristics that the most of the quantities of diffracted light concentrate at the certain two specific diffraction degrees.
CONSTITUTION: In the photographing optical system of color television consisting of a photographic lens system 10, diffraction grating 11, color stripe filter 12 and image pickup tube 13, the diffraction grating is made by the face shown by 14 of a transparent member 11. This diffraction grating comprises evaporating a transparent film such as of MgF2 on an optical transparent member 17 such as, e.g., glass or the like. The ray 15 incident to this diffraction grating is received diffraction action by the diffraction grating and is separated mainly to two luminous fluxes 16 of +1st order diffracted light and -1st order diffracted light. Hence, the imaging ray having passed through the lens separates to two luminous fluexes, by which the double images are formed. The use of such diffraction grating enables the inexpensive and high-performance low-pass filter to be obtained.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12174478A JPS5548724A (en) | 1978-10-03 | 1978-10-03 | Optical low-pass filter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12174478A JPS5548724A (en) | 1978-10-03 | 1978-10-03 | Optical low-pass filter |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5548724A true JPS5548724A (en) | 1980-04-08 |
Family
ID=14818796
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12174478A Pending JPS5548724A (en) | 1978-10-03 | 1978-10-03 | Optical low-pass filter |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5548724A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5895318A (en) * | 1981-09-10 | 1983-06-06 | エルゲ−ツエツト・ランデイス・ウント・ギ−ル・ツ−ク・アクチエンゲゼルシヤフト | Optical authentisity checking mark for document |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4853741A (en) * | 1971-10-08 | 1973-07-28 | ||
JPS4941688A (en) * | 1972-08-28 | 1974-04-19 |
-
1978
- 1978-10-03 JP JP12174478A patent/JPS5548724A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4853741A (en) * | 1971-10-08 | 1973-07-28 | ||
JPS4941688A (en) * | 1972-08-28 | 1974-04-19 |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5895318A (en) * | 1981-09-10 | 1983-06-06 | エルゲ−ツエツト・ランデイス・ウント・ギ−ル・ツ−ク・アクチエンゲゼルシヤフト | Optical authentisity checking mark for document |
JPH0251315U (en) * | 1981-09-10 | 1990-04-11 | ||
JPH0532827Y2 (en) * | 1981-09-10 | 1993-08-23 |
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