Linear Variable Edge Filters

Our Continuously Variable Edge Filters are Continuously Variable Long Wave Pass (CVLWP) or Short Wave Pass Filters (CVSWP) where the edge wavelength varies along a line, typically parallel to the longest dimension of the filter.

By combining one of our CVLWP with a corresponding CVSWP, a tunable Bandpass Filter can be implemented where both center wavelength and bandwidth are tunable. Watch a video to see how this works.

In combination with a Continuously Variable Dichroic a complete variable filter set for an Epi-fluorescence setup can be established. Each of the filters can be used separately.

For extended blocking in the complete silicon sensor wavelength range (300 – 1100 nm), our variable filters can be combined with homogeneous blocking filters. Please see to our Continuously Variable Filter set section for more details.

The filters are coated on single quartz substrates for minimal auto-fluorescence and high laser damage threshold. All of Delta Optical Thin Film’s Continuously Variable Filters are coated with ultra-hard surface coatings (UHC) that are also used by Delta Optical Thin Film in traditional fluorescence filters.

Product specifications – Continuous Variable Short Wave Pass

λ50% min (nm)λ50% max (nm)Product numberCoresponding CV LWPMax dimensionsData sheet
320850LF102474LF10247560 mm x 15 mm x 3 mmDownload_15px
3861005LF104555LF104550110 mm x 17 mm x 2 mmDownload_15px
395815LF104557LF10455888 mm x 11 mm x 2 mmDownload_15px
410652.5LF104561LF10455982,4 mm x 26,5 mm x 0,9 mmDownload_15px
652.5895LF104562LF10456082,4 mm x 26,5 mm x 0,9 mmDownload_15px

Product specifications – Continuous Variable Long Wave Pass Filters

λ50% min (nm)λ50% max (nm)Product numberCoresponding CV SWPMax dimensionsData sheet
310850LF102475LF10247460 mm x 15 mm x 3 mmDownload_15px
365785LF104558LF10455788 mm x 11 mm x 2 mmDownload_15px
3831000LF104550LF104555110 mm x 17 mm x 2 mmDownload_15px
410652.5LF104559LF10456182,4 mm x 26,5 mm x 0,9 mmDownload_15px
652.5895LF104560LF10456282,4 mm x 26,5 mm x 0,9 mmDownload_15px

Watch the video

Tune your own bandpass filter

This video shows the benefit of combining a CVLWP with a CVSWP to form a bandpass filter where both center wavelength and bandwidth are tunable.

Did you not find what you need? We can also develop your custom Continuous Variable Edge Filter set

Contact us for further information