GB851404A - Improvements in or relating to stereo viewers - Google Patents
Improvements in or relating to stereo viewersInfo
- Publication number
- GB851404A GB851404A GB32348/56A GB3234856A GB851404A GB 851404 A GB851404 A GB 851404A GB 32348/56 A GB32348/56 A GB 32348/56A GB 3234856 A GB3234856 A GB 3234856A GB 851404 A GB851404 A GB 851404A
- Authority
- GB
- United Kingdom
- Prior art keywords
- screen
- viewer
- lens
- cone
- 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.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
- G02B30/20—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes
- G02B30/26—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Illuminated Signs And Luminous Advertising (AREA)
- Overhead Projectors And Projection Screens (AREA)
Abstract
851,404. Stereoscopic apparatus. KODAK Ltd. Oct. 23, 1956 [Oct. 24, 1955], No. 32348/56. Class 97(1). In a stereo viewer in which stereo transparencies carried in a mount with their centres about 2¢ inches apart are projected on to a screen for viewing without the use of special glasses by the viewer, to allow the images to the viewer over a wider angle, the screen is so formed as to spread the light passing therethrough in such a manner that each point of light is diverged into a solid cone of light having a half angle of about 3 degrees at which angle the intensity is less than 50% of maximum, and a positive field lens is placed near the screen having a focal length equal to about ¢ to 2/3 times the distance of the field lens from.the two projection objectives. The screen may be a modified form of the cone screen described in Specification 706,741 or may be found by guiding one surface of a glass plate and coating the ground surface with a transparent layer of refractive index different from that of the sheet by between 0À02 and 0À2. As shown the viewer comprises a housing 54 for a lamp illuminating the transparencies 53 and projection lenses 56 forming superposed images on a cone screen 58 by way of mirror 57. A positive Fresnd lens 60 is placed close to the screen. The lens 60 may be a simple biconvex lens suitably placed screens may be provided to assist the corect location of the eyes.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US851404XA | 1955-10-24 | 1955-10-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB851404A true GB851404A (en) | 1960-10-19 |
Family
ID=22189703
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB32348/56A Expired GB851404A (en) | 1955-10-24 | 1956-10-23 | Improvements in or relating to stereo viewers |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB851404A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0140836A2 (en) * | 1983-11-03 | 1985-05-08 | Projectina AG | Optical apparatus for generating a stereoscopic visual image |
| US4959641A (en) * | 1986-09-30 | 1990-09-25 | Bass Martin L | Display means for stereoscopic images |
| GB2284068A (en) * | 1993-11-12 | 1995-05-24 | Sharp Kk | Three-dimensional projection display apparatus |
| GB2319629A (en) * | 1996-10-16 | 1998-05-27 | Minoru Inaba | Stereo slide viewer with film feeder |
-
1956
- 1956-10-23 GB GB32348/56A patent/GB851404A/en not_active Expired
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0140836A2 (en) * | 1983-11-03 | 1985-05-08 | Projectina AG | Optical apparatus for generating a stereoscopic visual image |
| EP0140836A3 (en) * | 1983-11-03 | 1988-03-02 | Projectina Ag Heerbrugg | Optical apparatus for generating a stereoscopic visual image |
| US4959641A (en) * | 1986-09-30 | 1990-09-25 | Bass Martin L | Display means for stereoscopic images |
| GB2284068A (en) * | 1993-11-12 | 1995-05-24 | Sharp Kk | Three-dimensional projection display apparatus |
| US5703717A (en) * | 1993-11-12 | 1997-12-30 | Sharp Kabushiki Kaisha | Three-dimensional projection display apparatus |
| GB2319629A (en) * | 1996-10-16 | 1998-05-27 | Minoru Inaba | Stereo slide viewer with film feeder |
| GB2319629B (en) * | 1996-10-16 | 2001-06-06 | Minoru Inaba | Stereo slide viewer and stereo slide viewing system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3200702A (en) | Stereoscopic projection apparatus | |
| JPS56117226A (en) | Transmissive projection screen | |
| GB348123A (en) | Improvements in or relating to projection apparatus | |
| GB1190913A (en) | Improvements in and relating to Picture Projection | |
| US2788707A (en) | Projection system for stereoscopic images | |
| GB851404A (en) | Improvements in or relating to stereo viewers | |
| GB711367A (en) | Improvements in or relating to stereoscopic viewing apparatus | |
| US1358685A (en) | Means for viewing pictures in relief | |
| GB741246A (en) | Improvements in or relating to illuminating devices for optical projection apparatus | |
| GB508219A (en) | Improvements in or relating to illuminating means for optical projection | |
| US2249061A (en) | Projection device | |
| GB418562A (en) | Improvements in processes for photography or cinematography in colours | |
| GB410515A (en) | Improvements in or relating to the production of pictures with stereoscopic or relief effect | |
| GB430508A (en) | Improvements in or relating to optical copying apparatus | |
| GB364617A (en) | Improvements in or relating to photographic cameras and picture projecting and viewing apparatus | |
| GB514673A (en) | Cinematograph film projection systems | |
| GB329438A (en) | Improvements in or relating to the projection of pictures in natural colours | |
| GB672012A (en) | Improvements in and relating to stereoscopic kinematography and photography | |
| GB703760A (en) | Means for producing stereoscopic pictures | |
| GB626447A (en) | Binocular viewing apparatus for microfilms and like transparencies | |
| Fleisher | Group stereoscopic examination of aerial photographs: A simple, inexpensive teaching tool | |
| GB459069A (en) | Improvements in or relating to stereoscopic pictures | |
| PL427784A1 (en) | Method for displaying images from tablet devices, using a magnifying glass, on a special screen | |
| GB691180A (en) | Improvements in three-dimensional projection of stationary and motion-pictures | |
| GB664755A (en) | Improvements in or relating to photographic view-finders |