Optical design information was generated for commercially available, injection moldable acrylic molding pellet formulations. Detailed spectrophotometric transmittance curves were prepared for the ultraviolet, visible, and infrared regions. Comprehensive refractive index and dispersion data were obtained using novel compression molding techniques to produce optically superior specimens for measurement. Uniformity of the acrylic material within a production lot and among several lots was examined in detail. ND, NF, and NC values indicated a refractive index uniformity of ±0.00010, ±0.00013, and ±0.00012, respectively. Dispersion was calculated as v=61.4. The critical aspects of specimen preparation for precision refractive index measurements to ±0.00005 is given particular emphasis. Other mechanical properties of acrylic molding formulations are listed as well as special characteristics useful in optical design considerations. Advantages of acrylic optics compared to conventional glass systems are discussed.

Date Published: 27 February 1980
PDF: 9 pages
Proc. SPIE 0204, Physical Properties of Optical Materials, (27 February 1980); doi: 10.1117/12.958140

Published in SPIE Proceedings Vol. 0204:
Physical Properties of Optical Materials
Roy F. Potter, Editor(s)