GB880690A - Improvements in and relating to view finders - Google Patents

Improvements in and relating to view finders

Info

Publication number
GB880690A
GB880690A GB3151/58A GB315158A GB880690A GB 880690 A GB880690 A GB 880690A GB 3151/58 A GB3151/58 A GB 3151/58A GB 315158 A GB315158 A GB 315158A GB 880690 A GB880690 A GB 880690A
Authority
GB
United Kingdom
Prior art keywords
transparent
frame
block
view
axis
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.)
Expired
Application number
GB3151/58A
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.)
Voigtlander AG
Original Assignee
Voigtlander AG
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 Voigtlander AG filed Critical Voigtlander AG
Publication of GB880690A publication Critical patent/GB880690A/en
Expired legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B23/00Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
    • G02B23/14Viewfinders

Landscapes

  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Viewfinders (AREA)

Abstract

880,690. Photographic view-finders. VOIGTLANDER A.G. Jan. 30, 1958 [Jan. 30, 1957], No. 3151/58. Classes 97(1) and 98(1). The brightness of the image of the fieldlimiting frame of an Albada view-finder comprising a transparent block between the plane frame-carrying surface and the part-transparent concave mirror is increased by arranging the frame at an angle to the axis of the view-finder. Thus, as shown, the frame 11 formed by disposition of reflecting material on one face of a transparent plate 8 is inclined at an angle of 1-5 degrees to the vertical in relation to the axis of a transparent block 5 disposed between plate 8 and a lens 1, the part-transparent concave mirror 13 between lens 1 and block 5 having its axis coincident with that of the block.
GB3151/58A 1957-01-30 1958-01-30 Improvements in and relating to view finders Expired GB880690A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE880690X 1957-01-30

Publications (1)

Publication Number Publication Date
GB880690A true GB880690A (en) 1961-10-25

Family

ID=6824438

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3151/58A Expired GB880690A (en) 1957-01-30 1958-01-30 Improvements in and relating to view finders

Country Status (1)

Country Link
GB (1) GB880690A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4390276A (en) * 1980-05-14 1983-06-28 Ring Sights Limited Collimator gunsight

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4390276A (en) * 1980-05-14 1983-06-28 Ring Sights Limited Collimator gunsight

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