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Longpass Filter

Product Details

Longpass Filters, also known as Longpass Edge Filters, are designed to transmit wavelengths greater than the cut-on wavelength of the filter. Longpass Filters are commonly used to isolate portions of the spectrum in a variety of industrial or life sciences applications including microscopy or fluorescence instrumentation. Longpass Filters are typically designed for a 0° Angle of Incidence, whereas Longpass Dichroic Filters are designed for use at a 45° Angle of Incidence. Longpass Filters can be used with Shortpass Filters to create custom bandpass filters. Certain Longpass Edge Filters can also be used as cold mirrors to minimize the heat buildup often caused by infrared radiation.

General specifications

Product name longpass filter
Cut-on 325-1300nm
Blocking wavelength 200-1650
Optical density: OD3; OD4; OD5; OD6
Diameter&Tolerance 0.5-600±0.02mm
Clear Aperture ≥90%
Thickness&Tolerance 0.3-50±0.02mm
Surface flatness 1/10Lambda
Surface quality 10-5
Beveling 45°×0.2mm
Coating  Hard Coated

Please contact us with your specific requirements.


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