JPS56109301A - Multilayer reflection-preventive film - Google Patents

Multilayer reflection-preventive film

Info

Publication number
JPS56109301A
JPS56109301A JP1223680A JP1223680A JPS56109301A JP S56109301 A JPS56109301 A JP S56109301A JP 1223680 A JP1223680 A JP 1223680A JP 1223680 A JP1223680 A JP 1223680A JP S56109301 A JPS56109301 A JP S56109301A
Authority
JP
Japan
Prior art keywords
lambda0
reflection
layer
preventive film
wavelength
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
JP1223680A
Other languages
Japanese (ja)
Other versions
JPS648801B2 (en
Inventor
Yoshio Saito
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.)
Tokyo Optical Co Ltd
Original Assignee
Tokyo Optical 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 Tokyo Optical Co Ltd filed Critical Tokyo Optical Co Ltd
Priority to JP1223680A priority Critical patent/JPS56109301A/en
Publication of JPS56109301A publication Critical patent/JPS56109301A/en
Publication of JPS648801B2 publication Critical patent/JPS648801B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
    • G02B1/11—Anti-reflection coatings
    • G02B1/113—Anti-reflection coatings using inorganic layer materials only
    • G02B1/115—Multilayers

Landscapes

  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Surface Treatment Of Optical Elements (AREA)

Abstract

PURPOSE:To obtain a durable reflection-preventive film having wavelength width and residual reflection improved, by allowing a four-layer reflection-preventive film of lambda0/4 (MgF2), lambda0/2, lambda0/4, and lambda0/4 in optical film thickness to reference wavelength lambda0 from a medium to a substrate to meet prescribed requirements. CONSTITUTION:A four-layer reflection-preventive film of lambda0/4, lambda0/2, lambda0/4, and lambda0/4 in optical film thickness from a medium to a substrate to reference wavelength lambda0 in a wavelength range for reflection prevention has an MgF2 vapor-deposited film as the 1st layer, and TiO2, Al2O3 and SiO2 vapor-deposited films, for example, as the 2nd-4th layers, and formulas (1)-(4) are satisfied, where refractive indexes of the 2nd layer of ununiform quality at the 3rd layer side and 1st layer side are denoted as nH and nL, average refractive indexes of the 3rd and 4th layers as n3 and n4, the refractive index of the substrate as nS, the refractive index of an imaginary base material to the 2nd layer as N, and deviations of change DELTAn in N equal to NH-NL from the best value as alpha and beta. Consequently, the durable reflection-preventive film having the wavelength and residual reflection improved can be obtained.
JP1223680A 1980-02-04 1980-02-04 Multilayer reflection-preventive film Granted JPS56109301A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1223680A JPS56109301A (en) 1980-02-04 1980-02-04 Multilayer reflection-preventive film

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1223680A JPS56109301A (en) 1980-02-04 1980-02-04 Multilayer reflection-preventive film

Publications (2)

Publication Number Publication Date
JPS56109301A true JPS56109301A (en) 1981-08-29
JPS648801B2 JPS648801B2 (en) 1989-02-15

Family

ID=11799728

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1223680A Granted JPS56109301A (en) 1980-02-04 1980-02-04 Multilayer reflection-preventive film

Country Status (1)

Country Link
JP (1) JPS56109301A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0258003A (en) * 1988-08-24 1990-02-27 Matsushita Electric Ind Co Ltd Antireflection film
JPH04166901A (en) * 1990-10-31 1992-06-12 Hoya Corp Optical parts having antireflection coating
JPH04191801A (en) * 1990-11-27 1992-07-10 Hoya Corp Optical parts

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0258003A (en) * 1988-08-24 1990-02-27 Matsushita Electric Ind Co Ltd Antireflection film
JPH04166901A (en) * 1990-10-31 1992-06-12 Hoya Corp Optical parts having antireflection coating
JPH04191801A (en) * 1990-11-27 1992-07-10 Hoya Corp Optical parts

Also Published As

Publication number Publication date
JPS648801B2 (en) 1989-02-15

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