OPTICAL HEAD FOR RECORDING REPRODUCTION

摘要

PURPOSE: An optical head for recording reproduction is provided to make composition simply and have a good reproduction signal by arranging an optical path conversion device composed of a complex beam divider between an objective lens and an optical cable. CONSTITUTION: An objective lens(140) is installed at a slider which is moved on an optical disc(100) in state of being floated by air dynamic pressure, and focuses a projected light, and forms an optical spot on the optical disc(100). A light source(110), arranged in a long distance relatively from the objective lens(140), generates and emits a light. An optical cable for transmitting light(120) transmits lights emitted from the light source to the objective lens(140). An optical cable for receiving light(151,155) transmits lights which is reflected at the optical disc(100) and pass it through the objective lens(140) in a long distance relatively. An optical detector(161,165) is arranged to be facing with exits of the optical cable for receiving light and is reflected at the optical disc(100), and receives light transmitted by way of the objective lens(140). An optical path conversion device is arranged between entrance of the optical cable and the objective lens(140), and converts a process path of the incidence light.