JPS57163209A - Optical filter - Google Patents

Optical filter

Info

Publication number
JPS57163209A
JPS57163209A JP4981081A JP4981081A JPS57163209A JP S57163209 A JPS57163209 A JP S57163209A JP 4981081 A JP4981081 A JP 4981081A JP 4981081 A JP4981081 A JP 4981081A JP S57163209 A JPS57163209 A JP S57163209A
Authority
JP
Japan
Prior art keywords
optical filter
layer
supporter
semiconductor thin
different compositions
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
JP4981081A
Other languages
Japanese (ja)
Other versions
JPS6042444B2 (en
Inventor
Hiroshi Fujiyasu
Haruhisa Kinoshita
Osamu Otsuki
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 JP4981081A priority Critical patent/JPS6042444B2/en
Publication of JPS57163209A publication Critical patent/JPS57163209A/en
Publication of JPS6042444B2 publication Critical patent/JPS6042444B2/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/20—Filters
    • G02B5/28—Interference filters
    • G02B5/285—Interference filters comprising deposited thin solid films

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
  • Optical Filters (AREA)

Abstract

PURPOSE:To obtain an optical filter that intercepts suddenly the light having a wavelength shorter than the specific wavelength, by forming a light absorbing film on a supporter by laminating multiple semiconductor thin film layers having different compositions so that the composition varies periodically in the width direction. CONSTITUTION:Plural multiple semiconductor thin films (such as PbTe layer 2 plus Pb0.8Sn0.2Te layer) having different compositions are laminated alternately by the hot wall epitaxial method on the main surface of a single side of a supporter 1 made of an infrared ray transmitting material (BaF2, etc.). Thus a multiple layer 3 is formed to obtain an optical filter that has the sudden intercepting characteristics and an absorbing end varying optionally within a certain range.
JP4981081A 1981-03-31 1981-03-31 optical filter Expired JPS6042444B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4981081A JPS6042444B2 (en) 1981-03-31 1981-03-31 optical filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4981081A JPS6042444B2 (en) 1981-03-31 1981-03-31 optical filter

Publications (2)

Publication Number Publication Date
JPS57163209A true JPS57163209A (en) 1982-10-07
JPS6042444B2 JPS6042444B2 (en) 1985-09-21

Family

ID=12841475

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4981081A Expired JPS6042444B2 (en) 1981-03-31 1981-03-31 optical filter

Country Status (1)

Country Link
JP (1) JPS6042444B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63119780A (en) * 1986-11-10 1988-05-24 エーザイ株式会社 Infrared ray irradiation apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63119780A (en) * 1986-11-10 1988-05-24 エーザイ株式会社 Infrared ray irradiation apparatus

Also Published As

Publication number Publication date
JPS6042444B2 (en) 1985-09-21

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