[OPTICAL REVIEW Vol. 1, No. 1 (1994) 107-109]

Measurement of Focusing Properties of Axially Asymmetric Lenses Using Moire Technique

Hideaki KONNO,1 Hiroyuki OHARA,1 Kazumi MURATA1 and Yoshiaki NAKANO2

1Department of Applied Electronics, Hokkaido Institute of Technology, Teine-ku, Sapporo, 006 Japan, 2Department of Physics, Hokkaido Institute of Pharmaceutical Sciences, Otaru, 047-02 Japan

(Accepted July 22, 1994)

Most lenses composed of spherical or aspherical surfaces have symmetrical focusing properties about an optical axis. On the other hand, unconventional optical systems such as cylindrical lenses, astigmatic or progressive power glasses have axially asymmetrical focusing properties. In this study, the method of measuring focusing properties by the moire technique is extended to asymmetrical lenses. Some unconventional lenses were experimentally tested, and the focusing power in the interesting region and azimuthal direction of the aperture was evaluated.

Key words : unconventional lens, axially asymmetrical lens, lens testing, moire technique, focusing power, focal length