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Credit Card Order Request a Quote Longpass Shortpass Bandpass Filter Links 3rd Millennium Microscopy Astronomy Flow Cytometry Raman Colour Imaging Bandpass Long/Shortpass Rejection band Dichroic Neutral Density Laser Line Analytical Engineering Cleaning Filters 3rd Millennium Longpass Filters The 3rd Millennium Longpass filters combine a patented, hermetic physical assembly with proprietary ALPHA Technology. A process which produces exceptionally steep cut-on slopes. This results in more precise location of cut-on points, the ability to place transmission and rejection regions extremely close together, and higher attenuation between the pass band and the rejection band. 3rd Millennium filters are also available as; Shortpass Filters Bandpass Filters Fluorescence Filter sets for more details please click on the appropriate area. 3rd Millennium Longpass Filters are available in the following configurations: Filter Type Wavelength Range Tolerance Transmission Blocking Range Blocking OD Size Longpass Cut-on       400 - 700nm every 10nm + 3nm > 90% peak UV to Cut-on OD 12 avg OD 6 min 25mm 700 - 800nm every 20nm + 3nm > 90% peak UV to Cut-on OD 12 avg OD 6 min 25mm 800 - 1100nm every 50nm + 3nm > 90% peak UV to Cut-on OD 12 avg OD 6 min 25mm How To Specify a Filter: Longpass Filter - specify a cut-on wavelength (Example: Part Number - 3RD 650LP) Filter Specifications: Assembly Diameter: 25mm Assembly Thickness: 5.5mm Clear Aperture: 21.3mm Substrates: SiO2 substrate with a broadband anti-reflection coating.

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