Optical filters

Longwave-pass Filters

Standard Longwave-pass Filters in stock, subject to prior sales (Wavelength range UV, VIS, NIR & IR).

If you don’t find a suitable filter for your application in the list below, please, contact Spectrogon’s sales team for further assistance. Go to request form.

Please note that our “stock” filters are not boxed, bagged, labelled and on the shelf ready to go. Our stock contains many thousands of filters and components. Sometimes it’s only the components that are in stock, which still need to be glued together to make multi component filters. The filters & components have to be pulled from stock, cleaned, re-measured and checked by QC, packed and shipped. Due to the finite resources of our QC department and the high demand on stock filters, normally delivery will be 7-10 days after receipt of order. Thanks for your understanding.

General Specifications:

Diameter: 25.4 mm +0/-0.2 mm. Custom sizing
Thickness: Specified in the filter list below (mm), tol ±0.2 mm

Blocking: Average < 0,1 % below passband through UV
Slope: < 5 % defined as:

Spectral measurements

Spectral curve at room temperature and normal incidence angle is supplied with each filter type.

Description: LP-Cuton in nanometers (Cuton at 5 % Transmission)

Click on the Description, to see spectral characteristics for the filters in stock.


Send us your request for Longwave Pass Filters (*Required information)

The privacy policy of Spectrogon (required)

By continuing to use the site, you agree to the use of cookies. more information

The cookie settings on this website are set to "allow cookies" to give you the best browsing experience possible. If you continue to use this website without changing your cookie settings or you click "Accept" below then you are consenting to this.