Overview of 355nm professional filters：

User's Manual

355nm Specialty Filter

There are also specialized filters available to eliminate extraneous wavelengths when measuring very short or very long wavelengths where the CCD cameras are not sensitive and the desired signal can get swamped by extraneous light of other wavelengths.

The 355nm narrow bandpass filter, P/N SPZ08246, is designed for operation with pulsed 355nm laser beams from tripled YAG’s.

The spectral range of typical CCD cameras extend into the UV as far as ~190nm. However the typical camera begins to rapidly lose response below ~400nm. As the response drops off spurious wavelengths (such as pumping sources) may combine with the 355nm wavelength. Since the camera is more sensitive at the longer wavelengths they can sometimes modify the observed beam profile. By inserting a narrow 355nm bandpass filter the unwanted wavelengths can be essentially excluded.

This filter is housed into an 8mm thick stackable C-mount ring. When used in combination with other optical accessories that require controlled spacing from the CCD imager this 8mm distance must be taken into account. I.e., when using a 4X beam expander or 4X beam reducer, you should use the 355nm filter plus one other regular filter to keep the required 3 filter spacing.

355nm professional filter specifications: