GB1347477A - Thermal imaging systems - Google Patents
Thermal imaging systemsInfo
- Publication number
- GB1347477A GB1347477A GB1347477DA GB1347477A GB 1347477 A GB1347477 A GB 1347477A GB 1347477D A GB1347477D A GB 1347477DA GB 1347477 A GB1347477 A GB 1347477A
- Authority
- GB
- United Kingdom
- Prior art keywords
- detectors
- diode
- scene
- energy
- imaging systems
- 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
- G02B23/12—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices with means for image conversion or intensification
Landscapes
- Physics & Mathematics (AREA)
- Astronomy & Astrophysics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Transforming Light Signals Into Electric Signals (AREA)
Abstract
1347477 Thermal imaging systems EMI Ltd 17 May 1971 [29 May 1970] 26079/70 Heading H4F Thermal energy from a scene is scanned across a stack of detectors 6 by a rocking mirror 8, 9 and lenses 7, 10. A photo-emissive diode 5 provides reference thermal energy at a certain time during each scan and the outputs of detectors 6 due to diode 5 are used in turn to control the gain of the common amplifier coupled to the detectors 6 to compensate for variations in the detectors 6. If the reference energy from diode 5 is not sufficient to swamp the scene energy a shutter (11, Fig. 2b, not shown) may be included having an arm carrying a filter which passes only radiation from the source 5, the shutter arm being rotated in front of detectors 6. In an alternative embodiment (Figs. 1(a), 1(b), not shown), scanning is accomplished by a prism which has a facet to reflect light from diode 5 to detectors 6 and to stop scene light at a certain rotational position. In either embodiment diode 5 is adjustable automatically in accordance with the scene brightness or manually to vary the brightness and contrast of the reproduced picture.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2607970 | 1970-05-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1347477A true GB1347477A (en) | 1974-02-27 |
Family
ID=10238022
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1347477D Expired GB1347477A (en) | 1970-05-29 | 1970-05-29 | Thermal imaging systems |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1347477A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4948964A (en) * | 1988-01-14 | 1990-08-14 | Texas Instruments Incorporated | Artificial target for automatic gain normalization |
-
1970
- 1970-05-29 GB GB1347477D patent/GB1347477A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4948964A (en) * | 1988-01-14 | 1990-08-14 | Texas Instruments Incorporated | Artificial target for automatic gain normalization |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |