JPS5713402A - Diffusing plate - Google Patents

Diffusing plate

Info

Publication number
JPS5713402A
JPS5713402A JP8803080A JP8803080A JPS5713402A JP S5713402 A JPS5713402 A JP S5713402A JP 8803080 A JP8803080 A JP 8803080A JP 8803080 A JP8803080 A JP 8803080A JP S5713402 A JPS5713402 A JP S5713402A
Authority
JP
Japan
Prior art keywords
light
order
transmitting
diffraction light
diffusing plate
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
JP8803080A
Other languages
English (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 JP8803080A priority Critical patent/JPS5713402A/ja
Priority to DE19813125317 priority patent/DE3125317A1/de
Publication of JPS5713402A publication Critical patent/JPS5713402A/ja
Priority to US06/473,266 priority patent/US4421398A/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
    • G02B5/02—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
    • G02B5/0273—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)
  • Viewfinders (AREA)
  • Optical Elements Other Than Lenses (AREA)
JP8803080A 1980-06-27 1980-06-27 Diffusing plate Pending JPS5713402A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP8803080A JPS5713402A (en) 1980-06-27 1980-06-27 Diffusing plate
DE19813125317 DE3125317A1 (de) 1980-06-27 1981-06-27 Einstellscheibe
US06/473,266 US4421398A (en) 1980-06-27 1983-03-14 Focussing plate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8803080A JPS5713402A (en) 1980-06-27 1980-06-27 Diffusing plate

Publications (1)

Publication Number Publication Date
JPS5713402A true JPS5713402A (en) 1982-01-23

Family

ID=13931417

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8803080A Pending JPS5713402A (en) 1980-06-27 1980-06-27 Diffusing plate

Country Status (1)

Country Link
JP (1) JPS5713402A (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4946252A (en) * 1987-08-05 1990-08-07 Asahi Kogaku Kogyo Kabushiki Kaisha Focusing screen

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52154629A (en) * 1976-06-18 1977-12-22 Tokyo Optical Focus detector in optical system
JPS5331127A (en) * 1976-07-26 1978-03-24 Yeda Res & Dev Focusing screen and method of producing same
JPS559568A (en) * 1978-07-06 1980-01-23 Minolta Camera Co Ltd Focal plate using phase type diffraction grating
JPS5570827A (en) * 1978-11-21 1980-05-28 Minolta Camera Co Ltd High level phase grating type focus plate

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52154629A (en) * 1976-06-18 1977-12-22 Tokyo Optical Focus detector in optical system
JPS5331127A (en) * 1976-07-26 1978-03-24 Yeda Res & Dev Focusing screen and method of producing same
JPS559568A (en) * 1978-07-06 1980-01-23 Minolta Camera Co Ltd Focal plate using phase type diffraction grating
JPS5570827A (en) * 1978-11-21 1980-05-28 Minolta Camera Co Ltd High level phase grating type focus plate

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4946252A (en) * 1987-08-05 1990-08-07 Asahi Kogaku Kogyo Kabushiki Kaisha Focusing screen

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