The Flexible Wavelength Selector (FWS) Basic is a manually tunable filter that features three knurled knobs – two for adjusting the center wavelength and the transmission bandwidth and one for compensating the beam direction offset.

Key product advantages:
-Precise manual control of wavelength tuning
-Bandwidth adjustment (FWHM 3 – 15 nm)
-Out-of-band Blocking OD 6 (0.00001 % transmission)
-Wide spectral range 255 - 1650 nm
-Compact (40 x 76 x 50 mm)

https://www.spectrolightinc.com/shop/product/60

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