Shortwave Pass (SWP) Edge Filters
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.
Short Wave Pass (SWP) Trim Filters
Short pass filters block a select band of longer wavelengths. This example, short pass filters block a select band of longer wavelengths. Short wave pass cutoff filter passes light from 325-450nm and blocks visible light from 500-700nm. It has a 50% point at 470nm ±10nm. Custom short wave pass filters are available on request.
470 Short Wave Pass (SWP) Filters
470 SWP filters are often used in fluorescence microscopy and other applications where near UV and blue pump wavelengths are required. Our 470 SWP filter passes an average of 85% of energy from 340nm-450nm wavelengths. Average transmittance from 500nm-700nm is reduced to less than 0.5%. Performance is specified at normal incidence. This coating is typically provided on Borofloat® glass but can also be coated onto fused silica or other UV transmissive glass materials.
