Background light affects the readings of measurements by creating an offset in the true readings. One method of preventing this issue is to configure a light-tight coupling system prior to taking measurements. Another method is to employ a chopper with a lock-in digital amplifier, such as Newport’s LIDA-SRS-KIT. This kit is able to separate the background noise from the desired signal. However, high levels of background light may still saturate the detector or camera being employed. The flanges on these filter wheels seal the light path, preventing unwanted signals from affecting measurements.

The USFW-100 Motorized Filter Wheel has been designed to operate with the Oriel CS130B, CS260B, and legacy monochromators (CS130, CS260), as well as the legacy MS260i and MS257 imaging spectrographs. A ribbon cable required for power and communication is sold separately.

The USFW-100 is a single filter wheel housing with no separate controller box. Communication with a computer is established through a USB connection ( is included in the package), and its utility software is compatible with Windows 7, 8 and 10 (32 and 64 bit). The USFW-100 also features a pushbutton to manually advance the filter without requiring a computer. Please note that 1-in. lens tubes and a  are compatible but sold separately.