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Multi-Elements & Position Sensitive Photodiodes

Sum and Difference Amplifier Moduls

Key Features

  • A 10µm gap is available for the QD50-SD module
  • Other QD7-XX or QD50-XX are available upon request

Description

QD7-0-SD or QD50-0-SD are quadrant photodiode arrays with associated circuitry to provide two difference signals and a sum signal. The two difference signals are voltage analogs of the relative intensity difference of the light sensed by opposing pairs of the photodiode quadrant elements.

In addition the amplified sum of all 4 quadrant elements is provided as the sum signal. This makes the QD7-0-SD or QD50-0-SD ideal for both light beam nulling and position applications. Very precise light beam alignments are possible, and the circuit can also be used for target acquisition and alignment.

Applications

  • Microscopy
  • Navigation

Downloads

Specifications: