Midwest Optical Systems LP285-77 Teledyne Flir Image Space Principal Plane (mm):

Image Space Principal Plane (mm):

25 SWIR Longpass M13

5 Narrow Near-IR Bandpass M35

and an optional Motorized P-Iris is available as noted

Midwest Optical Systems BP470-34 Blue Bandpass M34 Bandpass Filters

Midwest Optical Systems LP285-77 Teledyne Flir Image Space Principal Plane (mm):Midwest Optical Systems LP285 77 High Transmission Heat Resistant A R Protective Window M77 Protective Filters Often referred to as a sharp cut filter, Longpass Filters are specifically designed to pass a broad spectrum of longer wavelength light while blocking shorter wavelengths. Longpass Filters are often used in fluorescence applications to block an excitation light source or to pass multiple emission wavelengths, improving signal to noise ratio.