White Paper

Circular Variable Filters

Source: CI Systems, Inc.

By Dario Cabib, CTO at CI Systems

Circular Variable Filters (CVFs) are interference narrow-pass filters of advanced design which are deposited on circular substrates, called segments. Film thickness, and therefore the wavelength of peak transmittance varies linearly and continuously with angular position on the segment.

Circular Variable Filters are ideally suited as monochromators in compact, non-dispersive spectrometers, allowing medium and high resolution spectral radiation measurements, or when information is desired at a number of specific wavelengths in the relevant spectral range.

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