GB945395A - Improvements in optical illusion devices - Google Patents
Improvements in optical illusion devicesInfo
- Publication number
- GB945395A GB945395A GB1137561A GB1137561A GB945395A GB 945395 A GB945395 A GB 945395A GB 1137561 A GB1137561 A GB 1137561A GB 1137561 A GB1137561 A GB 1137561A GB 945395 A GB945395 A GB 945395A
- Authority
- GB
- United Kingdom
- Prior art keywords
- edge
- entrance pupil
- horizon
- screen
- terrain
- 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
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/02—Viewing or reading apparatus
- G02B27/06—Viewing or reading apparatus with moving picture effect
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Closed-Circuit Television Systems (AREA)
Abstract
945,395. Flight training apparatus. GENERAL PRECISION SYSTEMS Ltd. March 28, 1962 [March 28, 1961], No. 11375/61. Heading B7W. In flight training apparatus of the kind providing for relative motion between a model terrain and the entrance pupil of an optical viewing device so that a trainee has an illusion of motion of the terrain as seen from the viewpoint defined by the entrance pupil, means are provided for simulating the effect of atmospheric mist or haze comprising a screen member having a substantially straight edge and so positioned that its face may form the sky in the scene image and its edge the apparent horizon, the member being so adjustable that its edge can appear controllably diffuse in simulation of the effect of haze or mist. A perspective image of a flat model terrain M is produced on the photomosaic A of a television camera by lens L 1 having an internal stop S of small dimensions. The entrance pupil formed by the stop is transferred forward by a pair of lenses L 2 and L 3 to a position S 1 , which becomes the effective viewpoint of the system. An opaque white screen B is positioned with its lower edge substantially coincident with the true horizon level and is mounted for travel bodily along a line approximating to the horizon viewing direction so that as it approaches the position S 2 the image of its lower edge becomes more and more blurred thus producing a more progressive obscuration of the scene over a larger vertical viewing angle. Means c may be provided for illuminating the face of the screen.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1137561A GB945395A (en) | 1961-03-28 | 1961-03-28 | Improvements in optical illusion devices |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1137561A GB945395A (en) | 1961-03-28 | 1961-03-28 | Improvements in optical illusion devices |
Publications (1)
Publication Number | Publication Date |
---|---|
GB945395A true GB945395A (en) | 1963-12-23 |
Family
ID=9985089
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1137561A Expired GB945395A (en) | 1961-03-28 | 1961-03-28 | Improvements in optical illusion devices |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB945395A (en) |
-
1961
- 1961-03-28 GB GB1137561A patent/GB945395A/en not_active Expired
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