Endless opportunities with our Continuously Variable Long Pass and Short Pass Edge Filters.
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 number | Coresponding CV LWP | Max dimensions | Data sheet |
|---|---|---|---|---|---|
| 320 | 850 | LF102474 | LF102475 | 60 mm x 15 mm x 3 mm |  |
| 386 | 1005 | LF104555 | LF104550 | 110 mm x 17 mm x 2 mm | |
| 395 | 815 | LF104557 | LF104558 | 88 mm x 11 mm x 2 mm | |
| 410 | 652.5 | LF104561 | LF104559 | 82,4 mm x 26,5 mm x 0,9 mm | |
| 652.5 | 895 | LF104562 | LF104560 | 82,4 mm x 26,5 mm x 0,9 mm | |
Product specifications – Continuous Variable Long Wave Pass Filters
| λ50% min (nm) | λ50% max (nm) | Product number | Coresponding CV SWP | Max dimensions | Data sheet |
|---|---|---|---|---|---|
| 310 | 850 | LF102475 | LF102474 | 60 mm x 15 mm x 3 mm | |
| 365 | 785 | LF104558 | LF104557 | 88 mm x 11 mm x 2 mm | |
| 383 | 1000 | LF104550 | LF104555 | 110 mm x 17 mm x 2 mm | |
| 410 | 652.5 | LF104559 | LF104561 | 82,4 mm x 26,5 mm x 0,9 mm | |
| 652.5 | 895 | LF104560 | LF104562 | 82,4 mm x 26,5 mm x 0,9 mm | |
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.