Single-point diamond turning produces off-axis parabolic (OAP) mirrors, off-axis elliptical (OAE) mirrors, and precision metal, plastic, and crystalline optical components. The manufacturing technique involves mechanical machining of precision elements using lathes or other machines equipped with diamond-tipped bits. RMS surface roughness values are down to 30 ？ and coatings are available. 

Edmund Optics 

Barrington, NJ 

(From:www.edmundoptics.com)