This is the G380213216 Heat-Protection Filter from Qioptiq Photonics, designed to protect your optical system from high temperatures. The filter is rectangular in shape, with dimensions of 50 x 50 mm, and has a thickness of 1.8mm, making it a compact yet effective solution.
The filter is made from UVFS MAL-1965 material, a choice that ensures durability and reliability. It is a Shortpass Filter, specifically designed to pass waves of a certain length while blocking those of longer wavelengths. In this case, the filter is designed for a wavelength of 588nm.
The filter features Qioptiq's proprietary Calflex B1-K1 coating on both the front and back surfaces. This coating is designed to enhance the filter's heat protection capabilities, providing an additional layer of protection for your optical system.
The filter is available from Qioptiq's online shop and is currently in stock. For more information, you can visit the provided weblink.