JPS5574512A - Optical low-pass filter - Google Patents
Optical low-pass filterInfo
- Publication number
- JPS5574512A JPS5574512A JP14721378A JP14721378A JPS5574512A JP S5574512 A JPS5574512 A JP S5574512A JP 14721378 A JP14721378 A JP 14721378A JP 14721378 A JP14721378 A JP 14721378A JP S5574512 A JPS5574512 A JP S5574512A
- Authority
- JP
- Japan
- Prior art keywords
- pass filter
- formation
- sides
- optical elements
- moires
- 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.)
- Granted
Links
Landscapes
- Optical Elements Other Than Lenses (AREA)
Abstract
PURPOSE: To prevent the formation of boundary lines and moires, etc. by bonding a plurality of the optical elements of the specific construction.
CONSTITUTION: A multiplicity of optical elements 1 in which the refractive indices of the side A change parabolically and the refractive indices of the sides C, D are constant are formed by drawing out the glass bodies having a rectangular or square section in fiber form, applying protection such as of paraffin which is not attacked by NaOH, KOH on the sides A, B then putting the fibers in a solution of NaOH, KOH, etc., after which a multiplicity of such optical elements 1 are parallel disposed in such a manner that the sides C, D of a constant refractive index are bonded with each other, thence the elements are put in molds and are fusion-bonded under application of pressure and heat, whereby the low-pass filter 2 is provided. With this filter, the out-of-focus is equivalent to that of lenticular but its surface is flat and therefore the low-pass filter which obviates the formation of the boundary lines of the troughts of the arc face as dark and bright fringes within the image and the formation of moires as with lenticular is obtained.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14721378A JPS5574512A (en) | 1978-11-30 | 1978-11-30 | Optical low-pass filter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14721378A JPS5574512A (en) | 1978-11-30 | 1978-11-30 | Optical low-pass filter |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5574512A true JPS5574512A (en) | 1980-06-05 |
JPS6119020B2 JPS6119020B2 (en) | 1986-05-15 |
Family
ID=15425120
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14721378A Granted JPS5574512A (en) | 1978-11-30 | 1978-11-30 | Optical low-pass filter |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5574512A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4676593A (en) * | 1983-04-18 | 1987-06-30 | Asahi Kogaku Kogyo Kabushiki Kaisha | Eyepiece and photographing device for fiberscope |
-
1978
- 1978-11-30 JP JP14721378A patent/JPS5574512A/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4676593A (en) * | 1983-04-18 | 1987-06-30 | Asahi Kogaku Kogyo Kabushiki Kaisha | Eyepiece and photographing device for fiberscope |
Also Published As
Publication number | Publication date |
---|---|
JPS6119020B2 (en) | 1986-05-15 |
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