GB2241081A - Ghost-eliminating apparatus of total reflection prism - Google Patents

Ghost-eliminating apparatus of total reflection prism Download PDF

Info

Publication number
GB2241081A
GB2241081A GB9103094A GB9103094A GB2241081A GB 2241081 A GB2241081 A GB 2241081A GB 9103094 A GB9103094 A GB 9103094A GB 9103094 A GB9103094 A GB 9103094A GB 2241081 A GB2241081 A GB 2241081A
Authority
GB
United Kingdom
Prior art keywords
total reflection
reflection surface
ghost
prism
light
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.)
Withdrawn
Application number
GB9103094A
Other languages
English (en)
Other versions
GB9103094D0 (en
Inventor
Tetsuya Abe
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.)
Pentax Corp
Original Assignee
Asahi Kogaku Kogyo Co Ltd
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 Asahi Kogaku Kogyo Co Ltd filed Critical Asahi Kogaku Kogyo Co Ltd
Publication of GB9103094D0 publication Critical patent/GB9103094D0/en
Publication of GB2241081A publication Critical patent/GB2241081A/en
Withdrawn legal-status Critical Current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
    • G02B27/0018—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 with means for preventing ghost images
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
    • G02B23/14—Viewfinders
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B13/00—Viewfinders; Focusing aids for cameras; Means for focusing for cameras; Autofocus systems for cameras
    • G03B13/02—Viewfinders
    • G03B13/06—Viewfinders with lenses with or without reflectors

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Astronomy & Astrophysics (AREA)
  • Viewfinders (AREA)
  • Lenses (AREA)
  • Optical Elements Other Than Lenses (AREA)
GB9103094A 1990-02-14 1991-02-14 Ghost-eliminating apparatus of total reflection prism Withdrawn GB2241081A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3301290A JPH03236031A (ja) 1990-02-14 1990-02-14 全反射プリズムのゴースト除去構造

Publications (2)

Publication Number Publication Date
GB9103094D0 GB9103094D0 (en) 1991-04-03
GB2241081A true GB2241081A (en) 1991-08-21

Family

ID=12374910

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9103094A Withdrawn GB2241081A (en) 1990-02-14 1991-02-14 Ghost-eliminating apparatus of total reflection prism

Country Status (4)

Country Link
JP (1) JPH03236031A (ja)
DE (2) DE4104546A1 (ja)
FR (1) FR2658306A1 (ja)
GB (1) GB2241081A (ja)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5564223A (en) * 1978-11-09 1980-05-14 Ricoh Co Ltd Bright frame type finder
JPS55151601A (en) * 1979-05-15 1980-11-26 Minolta Camera Co Ltd Pentagonal prism for camera finder
US4278339A (en) * 1979-05-18 1981-07-14 Minolta Camera Kabushiki Kaisha Pentagonal prism module for camera viewfinder
JP2544427B2 (ja) * 1988-02-17 1996-10-16 オリンパス光学工業株式会社 ファインダ―光学系
JP2559323B2 (ja) * 1992-12-28 1996-12-04 タキイ種苗株式会社 接ぎ木用支持具

Also Published As

Publication number Publication date
GB9103094D0 (en) 1991-04-03
DE4104546A1 (de) 1991-08-22
FR2658306A1 (fr) 1991-08-16
DE9116469U1 (de) 1992-11-05
JPH03236031A (ja) 1991-10-22

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)