GB880690A - Improvements in and relating to view finders - Google Patents
Improvements in and relating to view findersInfo
- 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
Links
Classifications
-
- 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
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.
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4390276A (en) * | 1980-05-14 | 1983-06-28 | Ring Sights Limited | Collimator gunsight |
-
1958
- 1958-01-30 GB GB3151/58A patent/GB880690A/en not_active Expired
Cited By (1)
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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