FGB25M Dia:25 mm UG5 Colored Glass UV-Passing Filter; SM1-Threaded Mount

The FGB25M is a color glass filter manufactured by Thorlabs, a leading global supplier of photonics equipment. This filter, with a catalog number FGB25M, is designed for use in UV-passing applications, featuring a wavelength of 588 nm. The filter is circular in shape, with a diameter of 25 mm and a thickness of 2 mm, making it compatible with a wide range of optical systems.

The FGB25M filter is made from high-quality n-bk7 Schott glass, a material known for its excellent optical properties. It is coated on both the front and back with Thorlabs' proprietary coating, identified as 'tho fgb25'. This coating enhances the filter's performance, ensuring efficient UV-passing capabilities.

The filter's physical data includes a cut-on wavelength of 315 nm and a cut-off wavelength of 445 nm. This means that it allows light with wavelengths between these two values to pass through while blocking light of other wavelengths. This feature makes it ideal for applications that require the selective filtering of UV light.

The FGB25M filter is SM1-threaded, allowing it to be easily integrated into various optical systems. The filter's availability and in-stock status are indicated on Thorlabs' website, ensuring users can access this high-quality component whenever they need it.