Patent ID: 7006426

Claim:
An electro-optical device for communicating with an optical disc comprising: a semiconductor chip having analog-to-digital conversion circuitry and logic circuitry contained therein; first and second photodetectors on the semiconductor chip in electrical communication with the analog-to-digital conversion circuitry; a laser diode supported by the semiconductor chip oriented to emit a laser beam in a first direction; an optical unit supported above the semiconductor chip, the optical unit having a first mirror aligned to reflect the laser beam from the first direction to a second direction, a first lens for directing the laser beam outward to strike the surface of an optical disc, glass members for directing the laser beam from the second direction to the first lens, a second lens for receiving an information-containing beam from the optical disc, a second mirror for splitting the information-containing beam into first and second component beams, and a third mirror for directing the first component beam at the first photodetector, the second component beam passing through the second mirror in a direction at the second photodectector.