Model 2901 offers silicon sensors which are responsive in the 190-1050 nm wavelength range. Model 2903 uses InGaAs sensors for 900-1700 nm responsivity.
Quadrant-cell photoreceivers consist of four individual yet identical photocells positioned very close to each other (100-µm gaps). To increase the sensitivity of these photoreceivers, each of the cells’ photocurrents is sent to its own individual amplifier before being processed with the other photocell signals to generate top-minus-bottom difference (vertical error) and right-minus-left difference (horizontal error) signals. A sum-of-all-quadrants signal is also provided for normalization purposes.
The 2901 and 2903 quadrant-cell photo-receivers can run off batteries or your own DC power supply. To ensure low noise operation, we strongly recommend our Model
Product Series Overview
Bandpass and neutral-density filters for filtering out unwanted light or attenuating the beam can be attached to the front of these photoreceivers with the aid of Newport's
Product Series Overview
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