Oriel Chopper Wheel, 2 Apertures

The 75162 is a two-aperture chopper wheel used with the 75160NF Oriel Optical Chopper Controller and ;LIDA-SRS-KIT Lock-in Digital Amplifier. The maximum beam size able to pass through the apertures is 1.26 inch [32 mm] diameter. The wheel is precision etched, and coated with a broadband absorber to minimize retro reflections. The chopper controller is used to adjust the chopping rate from 4 Hz to 140 Hz. This wheel is included at no extra cost with any order of the 75160NF or LIDA-SRS-KIT.