JPS5574512A - Optical low-pass filter - Google Patents

Optical low-pass filter

Info

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
Application number
JP14721378A
Other languages
Japanese (ja)
Other versions
JPS6119020B2 (en
Inventor
Michihiro Tokuhara
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Canon Inc
Original Assignee
Canon Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Canon Inc filed Critical Canon Inc
Priority to JP14721378A priority Critical patent/JPS5574512A/en
Publication of JPS5574512A publication Critical patent/JPS5574512A/en
Publication of JPS6119020B2 publication Critical patent/JPS6119020B2/ja
Granted legal-status Critical Current

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  • 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
JP14721378A 1978-11-30 1978-11-30 Optical low-pass filter Granted JPS5574512A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (1)

* Cited by examiner, † Cited by third party
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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