The ALV / CGS-3 Compact Goniometer is a self-contained system with 22 mW HeNe Laser, ALV-proprietary optical fiber based detector, APD-based single photon detector, ALV/LSE-5003 Electronics and ALV-5000/EPP Correlator. Due to it’s extremely compact size and small weight, it can be placed onto a “normal” table without the need of an additional breadboard or optical table. Since no user alignment of the system is required after delivery, it literally is a “ready to measure” instrument.