Detection systems for photoelastic modulator systems

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Detection systems for photoelastic modulator systems have several specific requirements which must be met for maximum flexibility of operation.

These requirements include:

- Frequency response. DC to several times the operating frequency of the PEM being used.

- Dark-current and/or background DC null.

- Preamplification for current to voltage conversion and buffering for impedance matching to signal cables.

For many applications, separate lowpass or DC signals and wide-band AC signals derived from the detector output are required.

Hinds Instruments offers a line of detectors and accessories which meet these requirements. The DET-100 model detectors all include a universal power supply.

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