Parabolic mirrors from Edmund Optics have reflected focal length from 12.7 to 516 mm

Off-axis parabolic first surface metal mirrors for broadband visible and IR applications have surface roughness down to 50 Å RMS with no spherical aberration and no chromatic aberration over a broadband range. They are available with a reflected focal length from 12.7 to 516 mm, with coatings for wavelengths from 400 to >12,000 nm.
Edmund Optics
Barrington, NJ
www.edmundoptics.com