Miniature optics for optical recording

This paper provides an overview of the optical subsystems used in optical recording, their present status, and future trends. Using reflectivity-sensing and polarization-sensing optical heads as examples, the many requirements that must be integrated into one assembly are described along with the individual technology alternatives. The state-of-the-art of conventional free-space optical, holographic, and hybrid elements is also described along with an integrated head assembly using waveguide optics. Future directions and requirements for these technologies are indicated. © 1988 SPIE.