JPS6491104A - Lamination structure of optical multi-layered film filter - Google Patents

Lamination structure of optical multi-layered film filter

Info

Publication number
JPS6491104A
JPS6491104A JP62249262A JP24926287A JPS6491104A JP S6491104 A JPS6491104 A JP S6491104A JP 62249262 A JP62249262 A JP 62249262A JP 24926287 A JP24926287 A JP 24926287A JP S6491104 A JPS6491104 A JP S6491104A
Authority
JP
Japan
Prior art keywords
films
layered
refractive index
layered film
nonreflecting
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
JP62249262A
Other languages
Japanese (ja)
Inventor
Satoshi Kusaka
Hideki Noda
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP62249262A priority Critical patent/JPS6491104A/en
Publication of JPS6491104A publication Critical patent/JPS6491104A/en
Pending legal-status Critical Current

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  • Surface Treatment Of Optical Elements (AREA)
  • Optical Filters (AREA)

Abstract

PURPOSE:To obtain good band characteristics with relatively simple constitution by providing a single-layered film having the refractive index equal to the refractive index of a substrate on the outermost layer of the multi-layered films on the substrate and forming nonreflecting films on this single-layered film. CONSTITUTION:The multi-layered films 12 are formed on the substrate 1 to constitute a band-pass filter. The single-layered film 13 having the refractive index equal to the refractive index of the substrate 1 is formed on the outermost layer of the multi-layered films 12 and the nonreflecting films 14 are formed thereon. Namely, the multi-layered films 12 consist of 23 layers; the layers having odd layer numbers are made of TiO2 having 2.25 refractive index and the layers having even layer numbers are made of SiO2 having 1.45 refractive index. The single-layered film 13 is formed as the 24th layer on the outside of the 23rd layer of the multi-layered films 12. The nonreflecting films 14 are formed as the 25th-28th layers on the outside of the single-layered film 13. The ripples in the transmission band are thereby decreased and the good band characteristics are obtd. without using a nonreflecting plate.
JP62249262A 1987-10-02 1987-10-02 Lamination structure of optical multi-layered film filter Pending JPS6491104A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62249262A JPS6491104A (en) 1987-10-02 1987-10-02 Lamination structure of optical multi-layered film filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62249262A JPS6491104A (en) 1987-10-02 1987-10-02 Lamination structure of optical multi-layered film filter

Publications (1)

Publication Number Publication Date
JPS6491104A true JPS6491104A (en) 1989-04-10

Family

ID=17190348

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62249262A Pending JPS6491104A (en) 1987-10-02 1987-10-02 Lamination structure of optical multi-layered film filter

Country Status (1)

Country Link
JP (1) JPS6491104A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997001777A1 (en) * 1995-06-28 1997-01-16 Jds Fitel Inc. Multilayer thin film bandpass filter
EP0932058A2 (en) * 1995-06-28 1999-07-28 Jds Fitel Inc. Multilayer thin film bandpass filter

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997001777A1 (en) * 1995-06-28 1997-01-16 Jds Fitel Inc. Multilayer thin film bandpass filter
EP0932058A2 (en) * 1995-06-28 1999-07-28 Jds Fitel Inc. Multilayer thin film bandpass filter
EP0932058A3 (en) * 1995-06-28 1999-10-06 Jds Fitel Inc. Multilayer thin film bandpass filter

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