JPS57144503A - Adjuster for distribution of light volume - Google Patents

Adjuster for distribution of light volume

Info

Publication number
JPS57144503A
JPS57144503A JP3034681A JP3034681A JPS57144503A JP S57144503 A JPS57144503 A JP S57144503A JP 3034681 A JP3034681 A JP 3034681A JP 3034681 A JP3034681 A JP 3034681A JP S57144503 A JPS57144503 A JP S57144503A
Authority
JP
Japan
Prior art keywords
distribution
light volume
elements
absorbing
backward
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
JP3034681A
Other languages
Japanese (ja)
Inventor
Jun Tokumitsu
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 JP3034681A priority Critical patent/JPS57144503A/en
Publication of JPS57144503A publication Critical patent/JPS57144503A/en
Pending 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
    • G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
    • G02B27/0938—Using specific optical elements
    • G02B27/095—Refractive optical elements
    • 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
    • G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Mechanical Light Control Or Optical Switches (AREA)
  • Optical Filters (AREA)

Abstract

PURPOSE:To obtain a simple and economical controller which gives the rotary symmetrical control to the distribution of light volume, by shifting two elements having the distribution of absorption in the prescribed axial direction vertical and backward to the optical axis. CONSTITUTION:The thickness d1 of an absorbing member 1 having the absorbing coefficient alpha is set to satisfy d1=A(yz<2>+y<3>/3)+B+C (A, B, C: constants), and a transparent member 2 having the absorbing coefficiency substantially equal to alpha and the same thickness as d1 is formed on the member 1. Thus a pair of elements 3 and 4 are obtained. These elements 3 and 4 are set opposite to each other and then shifted vertically and backward to an optical axis 5. As a result, a controller which controls the distribution of light volume in a rotary symmetric way can be obtained easily with a low cost.
JP3034681A 1981-03-03 1981-03-03 Adjuster for distribution of light volume Pending JPS57144503A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3034681A JPS57144503A (en) 1981-03-03 1981-03-03 Adjuster for distribution of light volume

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3034681A JPS57144503A (en) 1981-03-03 1981-03-03 Adjuster for distribution of light volume

Publications (1)

Publication Number Publication Date
JPS57144503A true JPS57144503A (en) 1982-09-07

Family

ID=12301272

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3034681A Pending JPS57144503A (en) 1981-03-03 1981-03-03 Adjuster for distribution of light volume

Country Status (1)

Country Link
JP (1) JPS57144503A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02149802A (en) * 1988-11-30 1990-06-08 Fuji Photo Film Co Ltd Optical filter and measuring instrument using the same
US4959664A (en) * 1987-08-27 1990-09-25 Minolta Camera Kabushiki Kaisha Laser scanner with beam transmissivity control
JPH02134512U (en) * 1989-04-14 1990-11-08

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4959664A (en) * 1987-08-27 1990-09-25 Minolta Camera Kabushiki Kaisha Laser scanner with beam transmissivity control
JPH02149802A (en) * 1988-11-30 1990-06-08 Fuji Photo Film Co Ltd Optical filter and measuring instrument using the same
JPH02134512U (en) * 1989-04-14 1990-11-08

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