Wavelength tuner from Spectrolight has an aperture up to 10 mm

The FWS-Basic flexible wavelength selector combines the wavelength tunability and adjustable bandwidth of a monochromator with the circular uniform aperture of a bandpass filter. It has an aperture up to 10 mm, and comes in models with tuning ranges covering the visible spectrum. Full-width half-maximum bandwidth is adjustable from 1.5 to 20 nm.
Spectrolight
Irvine, CA
www.spectrolightinc.com