Wratten longpass filters
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The colour effects within Wratten colour filters are achieved using organic dyes in a gelatine material, which is not possible in colour glass. This filter type can be manufactured to as little as 0.1mm thick and are more accurately controlled and documented. The below listed optical stock are band-pass type Wratten colour filters.
Wratten filters were originally designed for use in photography but are also used in imaging applications from industrial manufacture to medical.
Whilst less robust than polyester filter, their spectral data is more accurately documented. Wratten gelatin filters are now being replaced by Wratten 2 type filters which are manufactured using a ridged polymer. Wratten 2 filters are more robust and unaffected by water and moisture as gelatine type.
For more information on our stock range of Wratten 2 filters or to enquire about a custom quotation, please contact our technical sales team.
|Dimensions:||75 x 75 x 0.1mm|
Wavelength cut-on listed in table is transition cut-on wavelength (T=Tmax/2)
Wavelength cut-off listed in table is transition cut-off wavelength (T=Tmax/2)
Wavelength peak is centre wavelength
Colour glass longpass filters
Acrylic longpass filters
Acrylic longpass filter sets
Polyester longpass filters
Dichroic longpass filters
Dichroic beamspllitters longwave reflecting filters (45° AOI)
Dichroic beamsplitters longwave/band reflecting filter sets (45° AOI)
Mounted dichroic beamsplitters longwave reflecting filters (45° AOI)
Cold mirrors 45°
Raman edge filters
Raman edge filter sets
- Large 300x100mm sheets available that can be cut to smaller shapes and sizes.
- Stock sheets can be CNC machined to unusual shapes.
- Coating options from antireflective to anti-scratch.
- Mounting options.
|Part No.||Wavelength cut-on (nm)||Wavelength cut-off (nm)||Wratten No.||Colour||Length|
|411FWP7575 Download||411||2697||2B||Yellow (UV Absorbing)||75||75||0.1||£40.85|
|430FWP7575 Download||430||2715||2E||Yellow (UV Absorbing)||75||75||0.1||£40.85|
|600FWP7575 Download||600||2715||25||Tricolour Red||75||75||0.1||£40.85|
|717FWP7575 Download||717||2718||89B||Black (Absorbs Visible Passes IR up to 2500nm)||75||75||0.1||£90.25|
|794FWP7575 Download||794||2714||87||Black (Absorbs Visible Passes IR up to 2500nm)||75||75||0.1||£90.25|
|852FWP7575 Download||852||2716||87C||Black (Absorbs Visible Passes IR up to 2500nm)||75||75||0.1||£90.25|