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Unmounted Longpass Colored Glass Filters
(2" x 2")
These longpass colored glass filters are manufactured from different colors of Schott® glass and are intended for use in a wide variety of applications. The filters are available in both round and square varieties. The Ø25 mm round filters will fit into our manual or motorized filter wheels; alternatively, they can be mounted in a lens tube. A selection of Ø25 mm filters is available premounted. To mount the 2" x 2" square filters, choose from our selection of fixed filter holders. For the 6" x 6" filters, we recommend the FP02 Plate Holder. In addition to the longpass filters offered here, Thorlabs also offers a series of bandpass colored glass filters.
Several of the colored glasses used for our filters are fluorescent at certain wavelengths; for more details on how this may affect certain applications, contact Technical Support. For narrowband sources, we recommend our dielectric edgepass filters.
Colored Glass Filter Kits
Thorlabs offers two filter kits that bundle our most popular longpass and bandpass colored glass filters. The FGK01 Colored Glass Filter Kit contains three filters from our bandpass family and seven from our longpass family. The Ø25 mm filters are premounted in an SM1L03 lens tube that is engraved with the Item # and bandpass region (for bandpass filters) or cut-on wavelength (for longpass filters), and ship in a box with labeled slots to aid organization. The FGK01S Colored Glass Filter Kit contains the unmounted, square 2" x 2" counterparts to the filters in the FGK01.