| 摘要 |
PROBLEM TO BE SOLVED: To offer the constitution of a hologram laser unit and the arrangement of optical elements and to obtain an optical integrated unit which is small-size, lightweight and excellent in the environmental resistance and which can be easily assembled as an optical pickup. SOLUTION: The optical integrated unit comprises a light emitting element 26 to emit a beam to irradiate an optical disk, a light receiving element 20 to receive the beam of the light emitting element 26 reflected on the optical disk, a hologram element 22 to diffract the reflected beam from the optical disk, and a collimator lens 12 to receive the beam of the light emitting element 26 transmitting through the hologram element 22. The unit is equipped with the light emitting element 26, light receiving element 20, hologram element 22 and collimator lens 12 as an integrated device. |
