FGL280 Dia:25 mm N-WG280 Colored Glass Filter; 280nm Longpass

The FGL280 Dia:25 mm N-WG280 Colored Glass Filter is a specialized optical component designed for applications that require longpass filtering at 280nm. This filter, manufactured by Thorlabs, is a circular element with a diameter of 25mm and a thickness of 2mm, making it suitable for a wide range of optical systems.

The filter is constructed from N-BK7 Schott, a high-quality borosilicate glass known for its excellent optical properties. This material ensures high transmittance and low absorption across the visible spectrum, making it ideal for applications that require clear, undistorted optical transmission.

The FGL280 features a longpass filter with a cut-on wavelength of 280nm. This means that it allows light with wavelengths longer than 280nm to pass through while blocking shorter wavelengths. This property is particularly useful in applications such as fluorescence microscopy, where it can be used to isolate specific wavelength ranges.

The filter is coated with Thorlabs' proprietary THo FGL280B coating on both the front and back surfaces. This coating enhances the filter's performance by reducing surface reflections and improving transmission. It also provides excellent environmental stability, ensuring the filter's performance remains consistent even under varying conditions.

In terms of shape, the FGL280 is a thin lens, which means it has a curved surface that can help to focus or collimate light. This feature can be beneficial in certain optical systems where light focusing or collimation is required.

The FGL280 is currently in stock and available for purchase through Thorlabs' website. With its high-quality construction, advanced coating, and versatile design, this filter is an excellent choice for a wide range of optical applications.