The Gershun tube kit is used to control the field of view from 1° to 28° of an Ocean Optics SMA 905-terminated fiber or a spectrometer. The kit is coupled to the optical fiber using its adapter barrel or attaches directly to the connector on our spectrometers.
Each Gershun tube assembly comprises a conical-shaped base, a middle barrel and an outer barrel that can be threaded together. User-interchangeable apertures can be used to adjust field of view of the sampling setup. Apertures are held in place by a threaded retaining ring and are easily reassembled.
Attached to USB2000+ spectrometer