Roof Prisms Feature Roof prism is combined with a right angle prism and a totally internally reflecting roof and they are attached by them largest square surfaces. It can invert and reverse an image, also, deflect the image 90o . Therefore, it is often used in terrestrial telescopes, viewing systems and rangefinders Dual Collimator Beam Alignment Optical Switches Material: N-Bk7 or Fused silica Typical Dimension: mini 1 x 1 x 1mm,3 x 3 x 3mm Flatness: λ/[email protected] nm, Surface Quality: (scratch/dig) better than 20-10 Pyramid: <1 arc min Email: [email protected] Tel:+86-755-2372 7820 Fax：+86-755-2302 3823 www.hobbite.net Address:2F, Guohuitong Business Center, BaoAn District, ShenZhen City, GuangDong Province, PRC. Zip Code:518102