GB614929A - Improvements relating to viewing devices such as gun-sights and camera view-finders - Google Patents
Improvements relating to viewing devices such as gun-sights and camera view-findersInfo
- Publication number
- GB614929A GB614929A GB4237/46A GB423746A GB614929A GB 614929 A GB614929 A GB 614929A GB 4237/46 A GB4237/46 A GB 4237/46A GB 423746 A GB423746 A GB 423746A GB 614929 A GB614929 A GB 614929A
- Authority
- GB
- United Kingdom
- Prior art keywords
- graticules
- graticule
- collimators
- collimating
- reflectors
- 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)
- Lenses (AREA)
Abstract
614,929. Sighting devices. KODAK, Ltd. Feb. 11, 1946, No. 4237. Convention date, Nov. 28, 1944. [Class 92 (ii)] [Also in Group XX] In a sighting device of the type wherein an observer sees a distant graticule image superposed on a distant object by means of a partial reflector, the distant image is formed by several juxtaposed and identical collimators each comprising a graticule and a collimating element, the arrangement resulting in an extension of view finder's exit pupil. As shown in Fig. 1, the view finder may comprise a semi-reflector 21 through which an observer at 23 sees a distant object having superposed thereon a graticule image formed by reflection at 21 of the rays from the collimators comprising collimating lenses 25 co-operating with graticules 26 illuminated at 31. Such view finders may be incorporated in a photographic camera or gun-sight and, as shown in Fig. 6, for a camera, a view finder may comprise a semireflector 56, hinged about a horizontal axis, which reflects light to the observer from collimators comprising transparent blacks, the upper surfaces 71 of which constitute collimating lenses while graticules are engraved on the lower surfaces 70 ; the collimators receive daylight via a reflector 68. Other semi-reflectors may be used with the semireflector 21 in Fig. 1 ; these reflectors are placed parallel to one another and spaced in the direction of the collimator axis. Concave semi-reflectors may act as collimating elements co-operating with an equal number of graticules, the concave reflectors serving also to allow the distant object to be viewed. An arrangement is also described which allows of stereoscopic vision, the graticule image appearing either at infinity or at a finite distance, i.e. at the distance of the object; in this arrangement, the graticules and collimating lenses are provided on separate plates, which may be curved, so that the lines joining the optical centres of the collimating lenses with the centres, the graticules co-operating therewith converge to a point. A method of forming the graticules by photographing a master graticule through the assembly of collimating elements is also described.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US614929XA | 1944-11-28 | 1944-11-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB614929A true GB614929A (en) | 1948-12-30 |
Family
ID=22036139
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4237/46A Expired GB614929A (en) | 1944-11-28 | 1946-02-11 | Improvements relating to viewing devices such as gun-sights and camera view-finders |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB614929A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2619872A (en) * | 1949-02-11 | 1952-12-02 | Carl F Shepard | Optometric measuring device |
WO2006120529A1 (en) * | 2005-05-06 | 2006-11-16 | Csir | Aligning of optical devices |
-
1946
- 1946-02-11 GB GB4237/46A patent/GB614929A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2619872A (en) * | 1949-02-11 | 1952-12-02 | Carl F Shepard | Optometric measuring device |
WO2006120529A1 (en) * | 2005-05-06 | 2006-11-16 | Csir | Aligning of optical devices |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US2251984A (en) | Oscillograph scale system | |
US2403733A (en) | Stereoscopic optical system | |
GB1181149A (en) | Improvements in or relating to Day and Night Glasses | |
US2313561A (en) | Stereoscopic system | |
US1678493A (en) | Finder for photographic cameras | |
ES332351A1 (en) | Camera cinematographica estereoscopica. (Machine-translation by Google Translate, not legally binding) | |
GB960383A (en) | Observation and sighting telescope | |
US2313562A (en) | Stereoscope | |
US2487773A (en) | View finder for photographic apparatus | |
US2504384A (en) | Reflex camera with catadioptric optical system | |
GB614929A (en) | Improvements relating to viewing devices such as gun-sights and camera view-finders | |
US2384552A (en) | View and range finder | |
US1479211A (en) | Camera apparatus for binocular photography | |
GB918213A (en) | Improvements relating to infra-red periscopes | |
US2453697A (en) | Gun sight having a plurality of illuminated reticles | |
US3476011A (en) | Viewfinder including a porro reflecting system | |
US2492270A (en) | Stereo-optical system | |
GB656908A (en) | Optical arrangement for colour photography and cinematography | |
GB153325A (en) | Improvements in devices for taking kinematographic photograms, consisting of severalobjectives | |
US905802A (en) | Apparatus for the production and exhibition of colored photographs. | |
SU409183A1 (en) | DEVICE FOR STEREOSCOPIC MONITORING | |
US2584171A (en) | Gun sight having a plurality of illuminated reticles | |
GB476147A (en) | Improvements in telescopes | |
GB306540A (en) | Improvements in appliances for examination of the eye | |
GB509269A (en) | Improvements in and relating to apparatus for colour photography |