| 摘要 |
PURPOSE:To reduce the size and weight of a whole optical system, and provide an optical information recording reproducing device which is capable of detecting a stabilized signal though it is easy to be mounted and adjusted. CONSTITUTION:An 1/2 wavelength board 16, a beam dividing means 15a, a polarization and separation means 15b and a total reflected plane 15c are integrally formed so as to produce an integrated optical device. This integrated optical device is fixedly installed to a member where a laser light source 14, a first light receiving device 17a, a second light receiving device 17b, and a third light receiving device 17c are integrated into one piece. |
