JPS57190234A - Photo divider for photometry - Google Patents

Photo divider for photometry

Info

Publication number
JPS57190234A
JPS57190234A JP7597281A JP7597281A JPS57190234A JP S57190234 A JPS57190234 A JP S57190234A JP 7597281 A JP7597281 A JP 7597281A JP 7597281 A JP7597281 A JP 7597281A JP S57190234 A JPS57190234 A JP S57190234A
Authority
JP
Japan
Prior art keywords
submirror
group
reflecting
reflected
shaped
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
JP7597281A
Other languages
Japanese (ja)
Other versions
JPS6152411B2 (en
Inventor
Keiji Otaka
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP7597281A priority Critical patent/JPS57190234A/en
Publication of JPS57190234A publication Critical patent/JPS57190234A/en
Publication of JPS6152411B2 publication Critical patent/JPS6152411B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/10—Beam splitting or combining systems
    • G02B27/108—Beam splitting or combining systems for sampling a portion of a beam or combining a small beam in a larger one, e.g. wherein the area ratio or power ratio of the divided beams significantly differs from unity, without spectral selectivity
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/10—Beam splitting or combining systems
    • G02B27/14—Beam splitting or combining systems operating by reflection only
    • G02B27/143—Beam splitting or combining systems operating by reflection only using macroscopically faceted or segmented reflective surfaces
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/10—Beam splitting or combining systems
    • G02B27/14—Beam splitting or combining systems operating by reflection only
    • G02B27/144—Beam splitting or combining systems operating by reflection only using partially transparent surfaces without spectral selectivity

Landscapes

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

Abstract

PURPOSE:To improve a photometry property through improvement of a utilizing efficiency of light, by aligning a Fresnel-shaped submirror group, in which circular belt-shaped submirrors are aligned at the back of a reflecting mirror having a reflecting surface which has semitransparancy at at least a part thereof. CONSTITUTION:An individual submirror 8 of a Fresnel-shaped submirror group 2, mounted to the back of a reflecting source 1, has a back surface being formed in a circular belt, and the submirrors are aligned in a concentric manner. As a result, most of a light bundle 4, radiated from a photographing lens system 3, is reflected to a finder system 3 by the semitransparant reflecting surface of the reflecting mirror 1, and a light bundle 6, transmitting the semitransparant reflecting surface, is reflected by a minute submirror group 2 at the back of a main mirror 1 to lead it to a collecting element 5. The constitution permits efficient leading of a light bundle, reflected by the submirror group 2, to the collecting element 5.
JP7597281A 1981-05-20 1981-05-20 Photo divider for photometry Granted JPS57190234A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7597281A JPS57190234A (en) 1981-05-20 1981-05-20 Photo divider for photometry

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7597281A JPS57190234A (en) 1981-05-20 1981-05-20 Photo divider for photometry

Publications (2)

Publication Number Publication Date
JPS57190234A true JPS57190234A (en) 1982-11-22
JPS6152411B2 JPS6152411B2 (en) 1986-11-13

Family

ID=13591655

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7597281A Granted JPS57190234A (en) 1981-05-20 1981-05-20 Photo divider for photometry

Country Status (1)

Country Link
JP (1) JPS57190234A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH079872Y2 (en) * 1988-08-18 1995-03-08 昭和電線電纜株式会社 Wire rod continuous winding device

Also Published As

Publication number Publication date
JPS6152411B2 (en) 1986-11-13

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