JPS5291451A - Reflection preventive film - Google Patents

Reflection preventive film

Info

Publication number
JPS5291451A
JPS5291451A JP818976A JP818976A JPS5291451A JP S5291451 A JPS5291451 A JP S5291451A JP 818976 A JP818976 A JP 818976A JP 818976 A JP818976 A JP 818976A JP S5291451 A JPS5291451 A JP S5291451A
Authority
JP
Japan
Prior art keywords
reflection preventive
preventive film
symmetrical
installing
contain
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
Application number
JP818976A
Other languages
Japanese (ja)
Inventor
Rokuro Watabe
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.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP818976A priority Critical patent/JPS5291451A/en
Publication of JPS5291451A publication Critical patent/JPS5291451A/en
Pending legal-status Critical Current

Links

Landscapes

  • Surface Treatment Of Optical Elements (AREA)

Abstract

PURPOSE: To increase the reflection preventive effect on materials whose refractive index is 1.70, by installing four thin film layers which contain the symmetrical 3-layer film that has the same optical film thickness and possesses specific individual refractive indices, respectively.
COPYRIGHT: (C)1977,JPO&Japio
JP818976A 1976-01-27 1976-01-27 Reflection preventive film Pending JPS5291451A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP818976A JPS5291451A (en) 1976-01-27 1976-01-27 Reflection preventive film

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP818976A JPS5291451A (en) 1976-01-27 1976-01-27 Reflection preventive film

Publications (1)

Publication Number Publication Date
JPS5291451A true JPS5291451A (en) 1977-08-01

Family

ID=11686339

Family Applications (1)

Application Number Title Priority Date Filing Date
JP818976A Pending JPS5291451A (en) 1976-01-27 1976-01-27 Reflection preventive film

Country Status (1)

Country Link
JP (1) JPS5291451A (en)

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