Jul 2005Bristol Instruments Inc.Request Info
The 621 laser wavelength meter introduced by Bristol Instruments Inc. uses optical interferometry to measure wavelength with high accuracy, reliability, versatility and convenience. Model 621A measures absolute wavelength with ±0.2-ppm accuracy, and the 621B delivers an accuracy of ±1.0 ppm. The built-in wavelength standard performs continuous calibration. Various versions operate from 350 nm to 4.0 µm. The devices are suitable for high-resolution laser spectroscopy, photochemistry and optical remote sensing.