Premium diffuse reflection glass with a diameter of 20mm and a thickness of 2mm, ideal for various optical applications. | Crafted from base materials, ensuring superior surface accuracy and performance at 632.8nm wavelength. | Precision-engineered with a thickness tolerance of ±0.05mm and an effective aperture of over 90% for optimal light transmission. | Cold working process guarantees durability and reliability, making it suitable for laboratory and industrial use. | Compatible with a wide range of optical setups, this filter is perfect for enhancing imaging and measurement accuracy. |