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Holmium & Didymium Calibration Filters

UQG (Optics) Ltd.Request Info
 
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Holmium & Didymium Calibration FiltersUQG Holmium & Didymium calibration filters made from Schott & Hoya glass are used in spectrophotometers as secondary calibration standards for the confirmation of the transmittance and absorption. Filters are supplied mounted in adonised black holders to fit standard 1cm cuvette holders usually supplied with most spectrophotometers. Unmounted filters can also be supplied without any certification for instruments and filter wheels.

UQG Optics has a range of stock sizes for a quick delivery.

CUSTOM MADE SIZES
Dimensions: Squares/Rectangles 3mm x 3mm to 165mm x 165mm
     •  Diameters 5mm to 160mm
Thickness: 0.50mm to 4mm (subject to dimension)

STOCK SPECIFICATION
Material: SCHOTT® or HOYA® filter glass
Dimension tolerance: +0.00 / -0.20mm
Thickness tolerance: ± 0.20mm
Edges: Fine ground
Surface quality: 60/40
Flatness: ≤ 3 fringes per 10mm2
Parallelism: ≤ 3 arc mins


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