JPS5713403A - Preparation for diffusing plate optically - Google Patents

Preparation for diffusing plate optically

Info

Publication number
JPS5713403A
JPS5713403A JP8803180A JP8803180A JPS5713403A JP S5713403 A JPS5713403 A JP S5713403A JP 8803180 A JP8803180 A JP 8803180A JP 8803180 A JP8803180 A JP 8803180A JP S5713403 A JPS5713403 A JP S5713403A
Authority
JP
Japan
Prior art keywords
indicates
pattern
diffused
lenses
diffusing
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
JP8803180A
Other languages
Japanese (ja)
Other versions
JPS6242243B2 (en
Inventor
Kiyoshi Iizuka
Takashi Suzuki
Keiji Otaka
Hidemasa Mizutani
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 JP8803180A priority Critical patent/JPS5713403A/en
Priority to US06/275,406 priority patent/US4427265A/en
Priority to DE19813125205 priority patent/DE3125205A1/en
Publication of JPS5713403A publication Critical patent/JPS5713403A/en
Publication of JPS6242243B2 publication Critical patent/JPS6242243B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
    • G02B5/0252—Diffusing elements; Afocal elements characterised by the diffusing properties using holographic or diffractive means
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0268—Diffusing elements; Afocal elements characterized by the fabrication or manufacturing method
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0273—Diffusing elements; Afocal elements characterized by the use
    • G02B5/0278—Diffusing elements; Afocal elements characterized by the use used in transmission

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Viewfinders (AREA)

Abstract

PURPOSE:To obtain a diffusing plate for preparing a bright finder screen with an excellent precision of a range finding by forming a periodic interference pattern on a photosensing material and conducting a luminous flux forming an optical-spot-pattern onto the photosensing material. CONSTITUTION:In the figure, 1 indicates a laser luminous flux, 2, 3 a beam expander system, 4 a lens holder holding three lenses 51-53, 61-63 three multipoint light sources generated by three convex lenses, respectively. As occasion demands, it is equally well to provide a filter 7, having a very small opening which is slightly larger than the size of the point light source, at places of 61-63, in order to remove noises caused by dusts and the like stuck on the lenses. Further, 11 indicates a diffusing face to obtain a speckle pattern, 8 indicates a pattern recording part, and in a part 20 where luminous fluxes emitted from each point light source are diffused on the part 8 and those diffused parts 91-93 are overlapped with each other at a angle, an interference fringe composed of three fluxes and diffused light 12 by a diffusing object is formed.
JP8803180A 1980-06-27 1980-06-27 Preparation for diffusing plate optically Granted JPS5713403A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP8803180A JPS5713403A (en) 1980-06-27 1980-06-27 Preparation for diffusing plate optically
US06/275,406 US4427265A (en) 1980-06-27 1981-06-18 Diffusion plate
DE19813125205 DE3125205A1 (en) 1980-06-27 1981-06-26 SPREADING PLATE

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8803180A JPS5713403A (en) 1980-06-27 1980-06-27 Preparation for diffusing plate optically

Publications (2)

Publication Number Publication Date
JPS5713403A true JPS5713403A (en) 1982-01-23
JPS6242243B2 JPS6242243B2 (en) 1987-09-07

Family

ID=13931446

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8803180A Granted JPS5713403A (en) 1980-06-27 1980-06-27 Preparation for diffusing plate optically

Country Status (1)

Country Link
JP (1) JPS5713403A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6606133B1 (en) 1999-02-04 2003-08-12 Keiwa Inc. Light diffusing sheet with direction-dependent diffusing ability

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6606133B1 (en) 1999-02-04 2003-08-12 Keiwa Inc. Light diffusing sheet with direction-dependent diffusing ability

Also Published As

Publication number Publication date
JPS6242243B2 (en) 1987-09-07

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