345HC80-25 25mm Dia. 345nm Borosilicate Glass Hard-Coated Broadband Bandpass Filter, HBW 80.0nm

This is the 345HC80-25, a 25mm diameter Bandpass Filter with a center wavelength of 345nm. Manufactured by Andover Corporation, this filter is made of borosilicate glass, specifically borofloat33, known for its excellent chemical resistance and thermal stability. The filter's geometry includes a thickness of 3.1mm, making it suitable for various optical applications.

The 345HC80-25 filter is designed with a Hard-Coated Broadband coating on both the front and back surfaces. This coating enhances the filter's durability and performance, providing a high damage threshold and excellent environmental stability. The filter's cut-on wavelength is 305nm, and the cut-off wavelength is 385nm, ensuring a narrow bandwidth of 80.0nm (HBW).

This filter is available in a Thin Lens shape, allowing for easy integration into optical systems. The Andover Corporation's website (https://www.andovercorp.com/products/bandpass-filters/hard-coated-broadband-filters/) provides more information and confirms its availability in stock.