This Thorlabs' Edgepass Filter Kit contains 10 mounted longpass filters for isolating regions of the IR spectrum. Each filter is mounted in a Ø1" black anodized aluminum ring that can be placed in a variety of lens tubes and optical mounts. The filters are packaged in a metal storage box.

Our edgepass filters are constructed of durable dielectric coatings and will withstand the normal cleaning and handling associated with any high-quality optical component. Their film construction is essentially a modified quarter-wave stack, using interference effects, rather than absorption, to isolate its spectral bands. Thus, unlike colored filter glass, the cut-off/cut-on wavelength will be shifted to shorter wavelengths with an increase in the angle of incidence. This feature can be useful in applications where it is desirable to fine tune the location of the cut-on or cut-off wavelength. Our edgepass filters are hermetically sealed for maximum humidity protection and may be combined for custom bandpass filters. Transmission curves are available in the Support Documents for each filter.

• Emission filters in fluorescence applications
• Order sorting filters for photometry
• Stray light or trim filters to eliminate any unwanted near band
• Roman Spectroscopy filters
• Astronomy applications

• FEL1000: 1000 nm CWL
• FEL1050: 1050 nm CWL
• FEL1100: 1100 nm CWL
• FEL1150: 1150 nm CWL
• FEL1200: 1200 nm CWL
• FEL1250: 1250 nm CWL
• FEL1300: 1300 nm CWL
• FEL1350: 1350 nm CWL
• FEL1400: 1400 nm CWL
• FEL1500: 1500 nm CWL