Trim filters, also commonly known as cut-off or dichroic filters, are advantageous for a variety of applications. Common uses include optical noise reduction for bar-code readers and wavelength band isolation for fluorescence applications. Trim filters are often used in conjunction with absorptive filter glasses to form band pass filters.

 

 

Minus Filter
This narrow band minus filter has a nominal bandwidth of 110 nm with an average reflection of more than 99% over a nominal bandwidth of 30-40 nm. The passbands have an average transmission of 90%. Custom made minus filters are available on request.

 

Band Pass Filter
These filter coatings transmit varying wavelength bands, which are determined by two cutoff wavelengths. Filters can be made at any given wavelength from near ultraviolet to near infrared.

 

 

 

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