Constructed from premium optical glass for superior clarity and durability, ensuring reliable performance in filtering invisible light wavelengths. devised to transmit infrared and near-infrared wavelengths at 850nm while effectively blocking visible light, ideal for optical applications. Narrowband filtering capability allows precise control of the invisible light , making it perfect for infrared photography and scientific experiments. Available in versatile round and square shapes to fit various optical setups, instruments, and custom applications requiring infrared light transmission. Transparent devise allows for effective filtering of visible light, making it suitable for sensors, cameras, and advanced scientific equipment.