Standard Shortpass Filters

These shortpass edge filters are made with hard dielectric filter coatings, producing a very steep transition between passband and stopband making them far superior to absorptive colored glass filters.

Steep cut-off transition slope
High rejection stop band
≥65% transmission shortpass band
Cut-off wavelengths from 400-1000 nm
Blocked to 1200 nm

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Description	Compatibility	Cut-off Wavelength	Transmittance Range	Price
10SWF-450-B Standard Shortpass Filters Optical Filter, Shortpass, 25.4 mm, 450 nm Cut-off, 415-440 nm Transmission	UNIVERSAL	450 nm	415 - 440 nm	$142
10SWF-500-B Standard Shortpass Filters Optical Filter, Shortpass, 25.4 mm, 500 nm Cut-off, 415-490 nm Transmission	UNIVERSAL	500 nm	415 - 490 nm	$142
10SWF-550-B Standard Shortpass Filters Optical Filter, Shortpass, 25.4 mm, 550 nm Cut-off, 415-540 nm Transmission	UNIVERSAL	550 nm	415 - 540 nm	$142
10SWF-600-B Standard Shortpass Filters Optical Filter, Shortpass, 25.4 mm, 600 nm Cut-off, 415-590 nm Trans.	UNIVERSAL	600 nm	415 - 590 nm	$142
10SWF-650-B Standard Shortpass Filters Optical Filter, Shortpass, 25.4 mm, 650 nm Cut-off, 415-640 nm Transmission	UNIVERSAL	650 nm	415 - 640 nm	$142
10SWF-700-B Standard Shortpass Filters Optical Filter, Shortpass, 25.4 mm, 700 nm Cut-off, 440-685 nm Transmission	UNIVERSAL	700 nm	440 - 685 nm	$142
10SWF-750-B Standard Shortpass Filters Optical Filter, Shortpass, 25.4 mm, 750 nm Cut-off, 475-735 nm Transmission	UNIVERSAL	750 nm	475 - 735 nm	$142
10SWF-800-B Standard Shortpass Filters Optical Filter, Shortpass, 25.4 mm, 800 nm Cut-off, 475-785 nm Transmission	UNIVERSAL	800 nm	475 - 785 nm	$142
10SWF-850-B Standard Shortpass Filters Optical Filter, Shortpass, 25.4 mm, 850 nm Cut-off, 475-835 nm Transmission	UNIVERSAL	850 nm	475 - 835 nm	$142
10SWF-900-B Standard Shortpass Filters Optical Filter, Shortpass, 25.4 mm, 900 nm Cut-off, 475-880 nm Transmission	UNIVERSAL	900 nm	475 - 880 nm	$142

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Features

Superior Isolation Between Stopband and Passband

Our shortpass filters feature both high transmission within the passband, and high rejection within the stop band, as well as a rapid transition, resulting in superior spectral isolation of a desired wavelength range. Out-of-band rejection for our shortpass filters is OD≥3. The stopband spans from the edge wavelength to 1200 nm. Typical transmission is ≥65% for shortpass filters.

Angular Sensitivity and Fine Wavelength Tuning

Unlike colored glass filters, the filter edge wavelength for thin film filters will shift to shorter wavelengths with increased AOI. This can be useful for tilt tuning these shortpass filters to your exact wavelength. The shift may be calculated by: λ_θ = λ_o [1-(n_o/n_e)² sin²θ]^1/2 where λ_θ is the wavelength at the new angle of incidence; λ_o is the center wavelength; n_o is the index of refraction of the environment (n_o = 1 in air); n_e is the effective index of refraction of the filter; and θ is the angle of incidence. This property can be beneficial as the filters may be intentionally tilted to either stop or allow transmission of light from lasers or light sources near the edge wavelength. Our visible and IR filters have a particularly high n_e, allowing more precise wavelength tuning.

Multiple Edge Wavelengths Available

Shortpass filters are available in a wide range of edge wavelengths, ranging from 385 to 1085 nm. A custom bandpass filter with excellent performance can be constructed using a combination of a shortpass and a longpass filter. These filters are available individually and in sets. The shortpass filter set consists of one shortpass filter for each available edge wavelength. They are shipped in a hardwood box for convenient storage and protection.