JPS56128907A - Optical system and astronomical artificial-light reducing filter maintaining color - Google Patents

Optical system and astronomical artificial-light reducing filter maintaining color

Info

Publication number
JPS56128907A
JPS56128907A JP3098980A JP3098980A JPS56128907A JP S56128907 A JPS56128907 A JP S56128907A JP 3098980 A JP3098980 A JP 3098980A JP 3098980 A JP3098980 A JP 3098980A JP S56128907 A JPS56128907 A JP S56128907A
Authority
JP
Japan
Prior art keywords
astronomical
artificial
optical system
light reducing
reducing 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
JP3098980A
Other languages
Japanese (ja)
Inventor
Yoichi Kimura
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to JP3098980A priority Critical patent/JPS56128907A/en
Publication of JPS56128907A publication Critical patent/JPS56128907A/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
    • G02B5/22—Absorbing filters

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Blocking Light For Cameras (AREA)
  • Optical Filters (AREA)

Abstract

PURPOSE:To take an astronomical color picture of good quality by using a thin- film colored filter having prescribed spectral transmissivity. CONSTITUTION:A colored filter of a thin gelatin or acetate film is used which has the center at 500nm and permits >=620nm light to pass through while occluding <=440nm and 530-620nm lights of the Hg bright line. This filter permits the blue, green and red lights of a color film to pass through equivalently. Thus, an astronomical color picture of good quality can be taken.
JP3098980A 1980-03-13 1980-03-13 Optical system and astronomical artificial-light reducing filter maintaining color Pending JPS56128907A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3098980A JPS56128907A (en) 1980-03-13 1980-03-13 Optical system and astronomical artificial-light reducing filter maintaining color

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3098980A JPS56128907A (en) 1980-03-13 1980-03-13 Optical system and astronomical artificial-light reducing filter maintaining color

Publications (1)

Publication Number Publication Date
JPS56128907A true JPS56128907A (en) 1981-10-08

Family

ID=12319022

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3098980A Pending JPS56128907A (en) 1980-03-13 1980-03-13 Optical system and astronomical artificial-light reducing filter maintaining color

Country Status (1)

Country Link
JP (1) JPS56128907A (en)

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