An optical signal recorder employing a transducer having an adjustable dichroic mirror.

摘要

A transducer or optical head arrangement for an optical disk recorder includes an adjustably mounted dichroic beam combiner. The adjustments are in two degrees of freedom about a pivot point (48) located near a light beam entry point. The write light source (21) has its emitted beam reflected to the optical disk (10) through a minimum of optical elements. The readback or sensing elements (23) are optically coupled to the optical disk via a light path (30) extending through the beam combiner entering at about the pivot point. The sensing elements include a second light source (24), an optical detector (65) and a beam splitter (62). The two light sources are shown as semiconductive laser-emitting different frequency light beams. A four-screw, adjustably- mounted aperture plate (46) retains a partial spherical dichroic beam combiner (41) in a cavity of an optical support (40).