Abstract

By placing two variable, liquid, cylindrical lenses with their axes crossed at right angles, a lens has been made which produces the effects characteristic of spherical, cylindrical or toroidal lenses, and in addition has the property of variable focus. The useful range of powers is about seven diopters, and the accuracy in repeating any power is satisfactory. Its application to ocular refraction is discussed.

© 1940 Optical Society of America

Reflectors Used in Highway Signs and Warning Signals. Parts I, II and III

G. A. Van Lear
J. Opt. Soc. Am. 30(10) 462-487 (1940)

Variable-focus liquid lens

Hongwen Ren and Shin-Tson Wu
Opt. Express 15(10) 5931-5936 (2007)

A Multipurpose Photoelectric Reflectometer

Richard S. Hunter
J. Opt. Soc. Am. 30(11) 536-559 (1940)

Variable-focus terahertz lens

Benedikt Scherger, Christian Jördens, and Martin Koch
Opt. Express 19(5) 4528-4535 (2011)

The Dispersion of Magnetic Double Refraction in the Short Infra-Red Spectrum

Francis J. Davis
J. Opt. Soc. Am. 30(10) 488-494 (1940)