FGL1000M Dia. 25 mm SM1-Mounted Colored Glass Filter; 1000nm Longpass

The FGL1000M is a color glass filter manufactured by Thorlabs, a leading global supplier of photonics equipment. This filter is designed with a diameter of 25 mm and a thickness of 2 mm, making it a compact yet robust solution for various optical applications. The filter is mounted in an SM1-compatible thread, ensuring a secure and stable fit in your optical setup.

The FGL1000M features a longpass cut-on wavelength of 1000 nm, allowing it to transmit light at this wavelength and above while blocking shorter wavelengths. This property makes it suitable for applications that require the isolation of specific wavelength ranges, such as infrared spectroscopy or laser applications. The filter's coating, denoted as 'tho fgl1000' on both the front and back surfaces, enhances its performance and durability.

The filter is made from n-bk7 Schott glass, a high-quality material known for its excellent optical properties and chemical resistance. This ensures the filter's reliability and performance over time, even under demanding conditions. The filter's thin lens shape further contributes to its versatility, making it compatible with a wide range of optical systems.