FSR-WG280 25.4 mm Dia. Colored Glass Absorptive Longpass Filter 285nm

The FSR-WG280 is a longpass filter with a diameter of 25.4 mm, sourced from the reputable vendor MKS/Newport. This filter is designed to transmit light at wavelengths above 285nm, making it ideal for applications that require the removal of shorter wavelengths. The filter's longpass characteristic is achieved through the use of absorptive coatings on both the front and back surfaces, which are specifically formulated to block unwanted wavelengths while allowing desired wavelengths to pass through.

The FSR-WG280 has a base shape of a circle, a standard geometry in optical systems due to its symmetry and ease of use in various applications. The filter's thickness is 3mm, providing sufficient structural integrity while minimizing the potential for distortions. The catalog number for this item is FSR-WG280, and it can be found on the Newport website, where it is currently in stock.

This filter is made from UVFS Mal-1965, a material known for its excellent optical properties and durability. The cut-on wavelength for this filter is 285nm, indicating the wavelength from which the filter starts to transmit light. The cut-off wavelength is 0nm, meaning that it blocks all wavelengths shorter than 285nm.

In terms of physical data, the FSR-WG280 has a diameter of 25.4mm, a common size in optical systems due to its compatibility with various components. The filter's shape is that of a thin lens, which helps to minimize optical aberrations and distortions.