Frequently Asked Questions

The set includes 3 large-format 1" ND filters (NDL-1-UV, NDL-2-UV, NDL-3-UV) in 1.3"-20 threaded filter holders, caps, and alignment targets.

The center wavelength options range from 488 to 1900 nm.

The OD options are 1.0, 2.0 & 3.0, which correspond to reflectivities of 90, 99 & 99.9 %, meaning transmissions 1, 0.1 & 0.01 %.

The set is commonly used with DataRay laser beam profilers for beam attenuation and diagnostics, as well as laser beam alignment.

The substrate material used is BK7, which is 200 ±50μm thick and λ/4 in transmission at 633nm over central 6mm φ.

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