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390nm Bandpass Colour Glass Filter 25mmdia x 3mmthk


€20.96
IN STOCK
SKU: 390FCS2500
More Information
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Diameter (mm) 25
Thickness (mm) 3
Type Bandpass
Colour Deep blue
CWL (nm) 390
Equivalent material BG25
Mounted/Unmounted Unmounted
Wavelength cut-off (nm) 445
Wavelength cut-on (nm) 335

Colour Glass Filters are polished sheets of special glass that have been cast with a dye included in it. Colour Glass Bandpass Filters are generally relatively cheap and very stable. The disadvantage with them is that they are only available in a relatively small number of variants, and so can be restrictive in bandpass selection.  Interference filters are then the best option however a more expensive choice is. 

The filters listed here are of the band-pass type and have uniform spectral transmission properties over their entire aperture. A wide range of band-pass filters are available with circular filters of 25mm diameter and square 50x50mm filters. These filters are primarily used in applications such as agriculture analysis, medical analysers and fluorescence applications.

Colour glass filters also have high transmissions at selected wavelengths therefore ideal where the angle of incidence of the incident light cannot be tightly controlled.

Material:
Diameter:
Length/Width:
Thickness:
Surface Quality:
Parallelism:
Colour glass
+0/-0.20 mm
± 0.20 mm
± 0.20 mm
<60-40 scratch/dig
<3 arcmin

Note:
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

Mounting of diameters and squares.
Antireflective coatings can be applied to one or both faces for improved transmission.
Cutting down or edged to special shapes and sizes at short notice.
Available in sets, supplied in a wooden storage box for research and laboratory use.