GB1057624A - Scanning mechanism - Google Patents
Scanning mechanismInfo
- Publication number
- GB1057624A GB1057624A GB4516763A GB4516763A GB1057624A GB 1057624 A GB1057624 A GB 1057624A GB 4516763 A GB4516763 A GB 4516763A GB 4516763 A GB4516763 A GB 4516763A GB 1057624 A GB1057624 A GB 1057624A
- Authority
- GB
- United Kingdom
- Prior art keywords
- prism
- aperture
- image surface
- axis
- scan
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N3/00—Scanning details of television systems; Combination thereof with generation of supply voltages
- H04N3/02—Scanning details of television systems; Combination thereof with generation of supply voltages by optical-mechanical means only
- H04N3/06—Scanning details of television systems; Combination thereof with generation of supply voltages by optical-mechanical means only having a moving lens or other refractor
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Mechanical Optical Scanning Systems (AREA)
Abstract
1,057,624. Television optical scanning apparatus. AGA A.B. Nov. 15, 1963, No. 45167/63. Heading H4F. A scanning mechanism for receiving electromagnetic radiation in the visible or infra-red portion of the spectrum comprises a planeparallel refractive prism 1 of polygon shape with an even number of sides which is rotated about an axis 2, a collecting refractive system (not illustrated) which has an image surface 5 located within the prism and the optical axis X of which intersects axis 2, an aperture 6 situated substantially on said optical axis and located just outside the circle 3 generated by the rotating prism and a radiation responsive element (e.g. a photo-electric cell or bolometer) positioned behind aperture 6. When prism 1 rotates, the aperture scans a line in the image surface 5 and when a corner of the prism passes the aperture a momentary retrace occurs. A second component of scan perpendicular to the direction of the first scan may be introduced by including an oscillating mirror in the collecting system or by tilting the axis of rotation 2 of the prism. The Specification discusses the form of image surface 5 that is required if the field is to be scanned without aberration for various values of refraction index for the prism. It is shown that the refractive index should be greater than 2, preferably between 3 and 6 with an optimum value of 4. This requires a substantially plane image surface which the collecting system can readily provide. The side of the prism may be coated to reduce reflection and the corners of the prism rounded to reduce air resistance. The signal derived from the radiation responsive clearcut is applied to modulate the scan intensity in a cathode ray tube scanned in two directions, synchronously with the two scanning components produced by the scanning mechanism.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US194622A US3253498A (en) | 1963-09-05 | 1962-05-14 | Scanning mechanism for electromagnetic radiation |
GB4516763A GB1057624A (en) | 1963-11-15 | 1963-11-15 | Scanning mechanism |
DE1963S0088347 DE1297136B (en) | 1963-11-15 | 1963-11-20 | Scanning device for picking up infrared radiation |
FR954546A FR1401971A (en) | 1963-11-15 | 1963-11-21 | Electromagnetic scanning mechanism, including optical scanning |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB4516763A GB1057624A (en) | 1963-11-15 | 1963-11-15 | Scanning mechanism |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1057624A true GB1057624A (en) | 1967-02-01 |
Family
ID=10436155
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4516763A Expired GB1057624A (en) | 1963-09-05 | 1963-11-15 | Scanning mechanism |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1057624A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2972271A1 (en) * | 2011-03-04 | 2012-09-07 | Sagem Defense Securite | HIGH RESOLUTION IMAGING SYSTEM |
-
1963
- 1963-11-15 GB GB4516763A patent/GB1057624A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2972271A1 (en) * | 2011-03-04 | 2012-09-07 | Sagem Defense Securite | HIGH RESOLUTION IMAGING SYSTEM |
WO2012120214A3 (en) * | 2011-03-04 | 2012-11-01 | Sagem Defense Securite | High-resolution imaging system |
US9273241B2 (en) | 2011-03-04 | 2016-03-01 | Sagem Defense Sécurité | High-resolution imaging system |
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