JPS57129410A - Spatial filtering device - Google Patents
Spatial filtering deviceInfo
- Publication number
- JPS57129410A JPS57129410A JP1608981A JP1608981A JPS57129410A JP S57129410 A JPS57129410 A JP S57129410A JP 1608981 A JP1608981 A JP 1608981A JP 1608981 A JP1608981 A JP 1608981A JP S57129410 A JPS57129410 A JP S57129410A
- Authority
- JP
- Japan
- Prior art keywords
- image
- fourier
- reflected
- spatial filtering
- space filter
- 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
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/42—Diffraction optics, i.e. systems including a diffractive element being designed for providing a diffractive effect
- G02B27/46—Systems using spatial filters
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Image Processing (AREA)
- Character Input (AREA)
Abstract
PURPOSE:To achieve a spatial filtering device where the observer can seek the optimum filtering characteristics suited to a character of a picture in a short time, by the spatial filtering using a reflection type space filter rewritable in real time. CONSTITUTION:Monochroic light 2 is incident to an input picture 1 placed on an object 0, it passes through a half mirror 7 and Fourier transformation is made at a lens 3. The Fourier-transformed image is filtered at a space filter 8 of reflection type placed on a Fourier transformation plane F, the reflected image is passed through the lens 3 again subjected to inverse-Fourier-transformation reflected on the half mirror 7, and projected on a screen 6 placed on an image I. The space filter 8 is an element to display an optical pattern in which a part of the Fourier transformation image is reflected and other parts are absorbed and scattered, and the element is made of an optical storage material which enables rewrite of the pattern through external heat, electric field, laser beam scanning and the like.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1608981A JPS57129410A (en) | 1981-02-05 | 1981-02-05 | Spatial filtering device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1608981A JPS57129410A (en) | 1981-02-05 | 1981-02-05 | Spatial filtering device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57129410A true JPS57129410A (en) | 1982-08-11 |
Family
ID=11906793
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1608981A Pending JPS57129410A (en) | 1981-02-05 | 1981-02-05 | Spatial filtering device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57129410A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61185719A (en) * | 1985-02-12 | 1986-08-19 | グラマン エアロスペ−ス コ−ポレ−シヨン | Repetition type optical filter |
| JP2007279750A (en) * | 2007-04-13 | 2007-10-25 | Nec Corp | Incidence preventing film forming method of condenser lens |
| CN104849873A (en) * | 2015-04-28 | 2015-08-19 | 中国科学院理化技术研究所 | Spatial filtering device |
-
1981
- 1981-02-05 JP JP1608981A patent/JPS57129410A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61185719A (en) * | 1985-02-12 | 1986-08-19 | グラマン エアロスペ−ス コ−ポレ−シヨン | Repetition type optical filter |
| JPH0549083B2 (en) * | 1985-02-12 | 1993-07-23 | Grumman Aerospace Corp | |
| JP2007279750A (en) * | 2007-04-13 | 2007-10-25 | Nec Corp | Incidence preventing film forming method of condenser lens |
| CN104849873A (en) * | 2015-04-28 | 2015-08-19 | 中国科学院理化技术研究所 | Spatial filtering device |
| CN104849873B (en) * | 2015-04-28 | 2017-04-19 | 中国科学院理化技术研究所 | spatial filtering device |
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