Abstract
The archimedes spiral cord modulating chopper was adopted in pyroelectric uncooled focal plane array (FPA) thermal imagery. The chopper exposure efficiency was theoretically analyzed and numerically simulated, and its impact on the following signal processing was obtained. The results show that chopper exposure efficiency directly affects detector pixel exposure time and incident radiation, and also affects the detector pixel effective accumulated charge uniformity with detector signal readout time coordinately. Modulating synchronization locating point should be added in the chopper, which can make thermal imagery be compatible with different exposure efficiency chopper. The effect of the chopper exposure efficiency should be synthetically considered when the whole thermal imaging system and its electronic processing system are designed.
| Original language | English |
|---|---|
| Pages (from-to) | 246-250 |
| Number of pages | 5 |
| Journal | Hongwai Yu Haomibo Xuebao/Journal of Infrared and Millimeter Waves |
| Volume | 23 |
| Issue number | 4 |
| Publication status | Published - Aug 2004 |
Keywords
- Archimedes spiral cord
- Exposure efficiency
- Modulating chopper
- Uncooled focal plane array thermal imagery
Fingerprint
Dive into the research topics of 'Analysis of modulating chopper used in pyroelectric uncooled FPA thermal imagery - Chopper exposure efficiency'. Together they form a unique fingerprint.Cite this
- APA
- Author
- BIBTEX
- Harvard
- Standard
- RIS
- Vancouver