Optical Filters / Optical Filters

The optical filters available can be purchased as round unmounted filters or for easy coupling as slide filters. 

Slide Filters are filters mounted in aluminium bars and inserted in the slots available in Sarspec’s Light Sources and Cuvette holders. This makes it very easy to change between filters without disassembling the light sources. Sarspec has available a large number of optical filters including :

Longpass Filters – Have low transmission in the shortwave region (blocking range) and high transmission in the longwave region (pass band). The range between 225 nm and 1000 nm has very steep transmission edges.

Shortpass Filters – The passband of shortpass filters is at lower wavelengths than the blocking range, compared to longpass filters. Basically they block longer wavelengths.

Bandpass Filters – Have a transmission band or bands surrounded by blocking bands allowing only a portion of the spectrum to pass. They are useful for high transmission in their designed spectrum while blocking other wavelengths.

Neutral Density Filters - reduce the intensity almost equally in a specific wavelength range.

Parameter Value
Material SCHOTT® filter glass
Diameter 12.5 mm
Thickness 3 mm (variable in Neutral Density Filters)
Available filters
LongPass filters (λ @ T=50%) 280 / 305 / 395 / 435 / 495 / 550 / 590 / 645 / 695 / 780 / 850 nm
ShortPass filters  BG3 / BG38 / BG39 / KG1 / KG3 / KG5
BandPass filters (transmission band) BG7 / BG18 / UG1 / UG5 / UG11
Neutral density filters (% transmission Vis region) 50% / 25% / 5% / 0.5% / 0.1%
Product Reference Unmounted Reference Slide
LongPass filters LPF-XXX SLPF-XXX-YYY
ShortPass filters SPF-AAA SSPF-AAA-YYY
BandPass filters BPF-BBB SBPF-BBB-YYY*
Neutral density filters NDF-ZZ SNDF-ZZ-YYY
XXX: Wavelength (nm)     AAABG3 / BG38 / BG39 / KG1 / KG3 / KG5    BBB: BG7 / BG18 / UG1 / UG5 / UG11        ZZ: % Transmission (50; 25; 5; 0.5; 0.1)
YYY: CHM for CH-MP / LSX for LS-Xe300 / LSW for LS-W / LSP for LS-DWHP / LSM for LS-MIR)

 

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