Abstract

In response to the requirements of optical disk mastering, a new micro- objective has been developed. Disk mastering requires a small spot, dynamically focused across a moving surface. The result is a low mass lens designed for high numerical aperture, and short focal length. To offer reduced spot size and spectral versatility, this objective is achromatized from UV Argon wavelengths through red diode colors, which can be used for focus servo methods. In disk applications, a single spot is imaged instantaneously, so the design permits some field curvature across its image area. Thus, this UV micro-objective incorporates appropriate optical and mechanical attributes for this custom application.

© 1994 Optical Society of America