OPTICAL HEAD

摘要

PURPOSE:To perform a recording/reproducing on an optical disk having the different thickness of a base material or a different dealing wavelength in an optical information reproducing device. CONSTITUTION:This device has a laser detector integration module 14 including a semiconductor laser 1a having a first wavelength for reproducing a first optical disk and a semiconductor laser 1b having a second wavelength for reproducing a second optical disk. The second optical disk which differents in the thickness or in the dealing wavelength from the first disk can be reproduced without any problem by displacing the light emitting source of the semiconductor laser 1b to a direction in an optical axis from the light emitting source of the semiconductor laser 1a. The reproducing of an optical disk having the different thickness of the base material or the different wavelength is made possible with simple constitution by using one pair of a condensing lens and an objective lens.