581FDL12 12.5 mm Dia. Longpass Dichroic Filter 581nm

The 581FDL12 is a Dichroic Filter, specifically a Longpass Filter with a 581nm cut-on wavelength, available from Knight Optical. This filter is designed with a circular geometry, featuring a 12.5mm diameter and a thickness of 1.1mm. The material used for this filter is n-BK7 Schott, a widely used optical glass known for its excellent transparency and homogeneity.

The filter's primary function is to reflect wavelengths shorter than 581nm while transmitting wavelengths longer than this value. This is achieved through the application of a specialized coating, referred to as 'kni 581fdl-0', on both the front and back surfaces of the filter. The cut-on wavelength is the point at which the filter begins to transmit light, and in this case, it is set at 581nm.

This filter is currently in stock and available for immediate purchase through the vendor's website. The item data also includes a direct weblink to the product page for user convenience. The vendor, Knight Optical, is a reputable source for optical elements, ensuring quality and reliability for this product.