Midwest Optical Systems LP286-48 1/2" Lens 25 VIS Block Short-Wave Infrared

25 VIS Block Short-Wave Infrared Longpass M13

Midwest Optical Systems BN630-77 Narrow Light Red Bandpass M77 Narrow Bandpass Filters

Midwest Optical Systems LP170-52 Fused Silica Protective Window M52 Protective Filters

5 Oleophobic A/R Protective Window M40

Midwest Optical Systems Bi808-49 Near-IR Interference Bandpass M49 Bandpass Interference Filters

Midwest Optical Systems LP286-48 1/2" Lens 25 VIS Block Short-Wave InfraredMidwest Optical Systems LP286 48 Borofloat Oleophobic VIS A R Coated Protective Window M48 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.