Camera, Infrared, Imager
Saturday, September 02, 2006
An Infrared Imaging Camera has been designed and developed that operate within three spectral wavebands: 8-12 m, 3-5 m, and 3-12 m. The temperature measurement ranges are: normal – 20*C to 400*C, and can be extended +20*C to 1500*C. The achievable accuracy is better than ±2*C for temperature less than 100*C and ±2% for measuring temperatures over 100*C.
Light enters the Camera through a focusing objective lens. A collimator acts as an entrance window to an evacuated scanner chamber. A patented high speed galvanometric scanning system provides vertical and horizontal scan at standard TV rates. A thermal reference is placed in the optical light path during the vertical scan trace. A neutral density filter is used for attenuation and to obtain the extended temperature range. This filter places the incoming light signal intensity within the normal range of the processing electronics. Optional filters on a filter wheel allows for large spectral band selection. The light, after attenuation and spectral filtering, is focused on a single cryogenically cooled single element photodetector.
An attachment for the Camera is an electrically driven low power closed cycle microcooler. The operating principle of the microcooler is a Stirling-cycle engine, and can generate liquid nitrogen temperature in less than three minutes. The microcooler measures 3.50 x 3.25 inches and weighs 15 ounces and draws less than 3 Watts (can be provided with battery power operation). The small size keeps the effects of heat and vibration to a minimum. Some of the other key features of the microcooler are: 1) 8000 hours contiguous life-test, 2) shelf life of five years, and 3) NASA space qualified.
Source: Inframetrics, Inc., North Billerica, MA
Reference: None Available
Industrial Products
posted by JD52 @ 8:20 PM,
