540HC10-50 50mm Dia. 540nm Borosilicate Glass Hard-Coated Narrowband Bandpass Filter, 10.0nm Bandwidth

The 540HC10-50 is a Hard-Coated Narrowband Bandpass Filter, designed and manufactured by Andover Corporation. This filter is specifically engineered for applications requiring a narrow bandwidth and high transmission in the visible spectrum.

The filter features a circular geometry with a diameter of 50mm and a thickness of 5mm, making it compatible with a wide range of optical systems. It is constructed from borofloat33, a type of borosilicate glass known for its excellent optical properties and durability.

The 540HC10-50 has a central wavelength (CWL) of 540nm, which is the wavelength at which the filter has its highest transmission. The cut-on wavelength is 535nm, and the cut-off wavelength is 545nm, indicating a narrow bandwidth of 10.0nm. This narrow bandwidth is crucial for applications that require high spectral purity and rejection of unwanted wavelengths.

The filter's coating is another key feature. Both the front and back surfaces are coated with the Andover 540HC10 coating, which is designed to enhance the filter's performance and durability. This coating provides excellent hardness, chemical resistance, and environmental stability, ensuring the filter maintains its performance over time.