JPS56135809A - Filter for astronominal observation - Google Patents

Filter for astronominal observation

Info

Publication number
JPS56135809A
JPS56135809A JP3739280A JP3739280A JPS56135809A JP S56135809 A JPS56135809 A JP S56135809A JP 3739280 A JP3739280 A JP 3739280A JP 3739280 A JP3739280 A JP 3739280A JP S56135809 A JPS56135809 A JP S56135809A
Authority
JP
Japan
Prior art keywords
refractive index
observation
thin film
astronominal
filter
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
JP3739280A
Other languages
Japanese (ja)
Inventor
Toshiaki Oinuma
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.)
HINO KINZOKU SANGYO KK
Original Assignee
HINO KINZOKU SANGYO KK
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 HINO KINZOKU SANGYO KK filed Critical HINO KINZOKU SANGYO KK
Priority to JP3739280A priority Critical patent/JPS56135809A/en
Publication of JPS56135809A publication Critical patent/JPS56135809A/en
Pending 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)
  • Blocking Light For Cameras (AREA)
  • Optical Filters (AREA)
  • Telescopes (AREA)

Abstract

PURPOSE:To reduce the number of thin films to be laminated and facilitate the manufacture of a filter by alternately laminating >=2 kinds of transparent substances different from each other in refractive index on color glass which does not almost transmit visible light of a specified wavelength or below to form a multilayer thin film. CONSTITUTION:Thin films of >=2 kinds of transparent substances different from each other in refractive index, e.g. TiO2 layer 2 with 2.73 refractive index and silicon monoxide layer 3 with 2.0 refractive index are alternately laminated by 11-19 layers on yellow glass 1 of JIS Y44, Y46, Y48 or the like which does not almost transmit visible light of <=440nm wavelegnths to form a multilayer thin film which does not almost transmit light of 530-625nm wavelengths. On this thin film protective layer 4 is formed. Thus, artificial illumination light and night sky glimmer harmful to observation can be eliminated, and the brightness to the sky is relatively increased to facilitate astronominal observation.
JP3739280A 1980-03-26 1980-03-26 Filter for astronominal observation Pending JPS56135809A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3739280A JPS56135809A (en) 1980-03-26 1980-03-26 Filter for astronominal observation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3739280A JPS56135809A (en) 1980-03-26 1980-03-26 Filter for astronominal observation

Publications (1)

Publication Number Publication Date
JPS56135809A true JPS56135809A (en) 1981-10-23

Family

ID=12496249

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3739280A Pending JPS56135809A (en) 1980-03-26 1980-03-26 Filter for astronominal observation

Country Status (1)

Country Link
JP (1) JPS56135809A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61109251A (en) * 1984-10-30 1986-05-27 エヌ・ベー・フイリツプス・フルーイランペンフアブリケン Photoelectric detector
JPS63175824A (en) * 1987-01-16 1988-07-20 Hoya Corp Light shielding lens
US5115379A (en) * 1985-08-27 1992-05-19 Kiyoshi Nagai Composite filter and illuminating device
JPH06160617A (en) * 1993-03-27 1994-06-07 Rigio Waki False color filter
WO1998058290A1 (en) * 1997-06-16 1998-12-23 San-Yu Sen-I Co., Ltd. Adapter for binocular and method of manufacturing same
EP2007132A1 (en) * 2006-03-28 2008-12-24 Kyocera Corporation Night vision device

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61109251A (en) * 1984-10-30 1986-05-27 エヌ・ベー・フイリツプス・フルーイランペンフアブリケン Photoelectric detector
US5115379A (en) * 1985-08-27 1992-05-19 Kiyoshi Nagai Composite filter and illuminating device
JPS63175824A (en) * 1987-01-16 1988-07-20 Hoya Corp Light shielding lens
JPH06160617A (en) * 1993-03-27 1994-06-07 Rigio Waki False color filter
WO1998058290A1 (en) * 1997-06-16 1998-12-23 San-Yu Sen-I Co., Ltd. Adapter for binocular and method of manufacturing same
EP2007132A1 (en) * 2006-03-28 2008-12-24 Kyocera Corporation Night vision device
EP2007132A4 (en) * 2006-03-28 2009-05-13 Kyocera Corp Night vision device
US7767964B2 (en) 2006-03-28 2010-08-03 Kyocera Corporation Night vision apparatus

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