Notes: • Focal lengths listed apply to 546 nm for PMMA (tolerance ± 5%). • The standard material used is PMMA (refractive index = 1.49; relative dispersion = 58). Other materials are available. • The mentioned thickness value is our standard thickness. Other thicknesses (> 0.8 mm) are possible. • Outside diameter / size may be up to 5 - 20 mm beyond clear aperture. Other dimensions or special trimmings can be realized upon request. • To determine the number of lines per mm, use 1/facet spacing. • Special designs possible on request. • All specification are subject to change without prior notice. FOG_8; Rev. 6; ©2013 ORAFOL Fresnel Optics GmbH Engineered to Manage Light ™ Fresnel Optics ORAFOL Fresnel Optics GmbH Flurstedter Marktweg 13 • 99510 Apolda • Germany Tel.: +49 3644 5011 0 • Fax: +49 3644 501150 E-Mail: [email protected] • www.fresnel-optics.de