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PHOTON-COUNTING CARD

Photonics Spectra
Jan 2005
Pacer InternationalRequest Info
 
PHOTON-COUNTING CARD Suitable for single-molecule detection, high-throughput DNA sequencing, lidar, optical rangefinding and adaptive optics, the SPCM-AQ4C four-channel photon-counting card is available from Pacer Components plc. It detects single photons over the 400- to 1060-nm range and incorporates a silicon avalanche photodiode that has a circular active area and a peak photon-detection efficiency exceeding 60% at 650 nm. Each photodiode is TE-cooled and temperature-controlled to ensure stable performance despite changes in the ambient temperature.


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GLOSSARY
adaptive optics
Optical components or assemblies whose performance is monitored and controlled so as to compensate for aberrations, static or dynamic perturbations such as thermal, mechanical and acoustical disturbances, or to adapt to changing conditions, needs or missions. The most familiar example is the "rubber mirror,'' whose surface shape, and thus reflective qualities, can be controlled by electromechanical means. See also active optics; phase conjugation.
lidar
An acronym of light detection and ranging, describing systems that use a light beam in place of conventional microwave beams for atmospheric monitoring, tracking and detection functions. Ladar, an acronym of laser detection and ranging, uses laser light for detection of speed, altitude, direction and range; it is often called laser radar.
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