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Knight Optical’s Dichroic Longpass Filters for Fluorescence Microscopy

15 Nov 2021

With an extensive range of cost-effective Dichroic Longpass Filters available, Knight Optical can meet the needs of a variety of diverse applications. Supplied either from stock (in standard 12.5mm and 25mm diameters or 50mm square types) or as a custom-made component (in sizes and shapes suitable for your project), Knight Optical's premium-quality Dichroic Longpass Filters are commonly specified for use within high-precision Fluorescence Microscopy applications.

Our Dichroic Longpass Filters are designed to transmit wavelengths longer than the filter’s ‘cut-on’ and to block bands below that point. Commonly manufactured for bands between 300-1200nm, these filters are typically specified with a 0° Angle of Incidence (AOI). Furthermore, our Dichroic Longpass Filters can also be used as beam combiners as a beamsplitter, and when used in conjunction with a shortpass filter, can also make a bandpass filter.

Typical specs:

Material: Borosilicate, Soda-Lime Glass

Dimensional tolerances:  ±0.1mm 

Wavelength range: CWL between 300-1200nm 

Wavelength accuracy: ± 5nm 

Peak transmission: > 95% @ CWL

Full width at half maximum (FWHM): Dependent on type 

Surface quality: < 40/20 Scratch/Dig

 First-Class Quality 

Quality is the driving force behind Knight Optical, and to ensure you profit from high-precision optics, we take the utmost care to ensure every component accurately meets your specifications. Offering unparalleled service, Knight Optical undertakes a full inspection of your optics from our ISO 9001:2015-certified, state-of-the-art Metrology Laboratory, followed by a meticulous visual examination by our dedicated QA department. 

To discover how we can enhance your supply chain experience and to learn more about our stock and custom-made Dichroic Longpass Filters, contact a member of our technical sales team today. 

UK, Europe, Asia & RoW: E-mail info@knightoptical.co.uk 

Tel +44 (0)1622 859444

USA & Canada: E-mail usasales@knightoptical.com 

Tel +001 401-583-7846 

Knight Optical Ltd
Roebuck Business Park
ME17 1AB
United Kingdom
Tel: 44 (0)1622 859444
Fax: 44 (0)1622 859 555
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