| 摘要 |
The pickup simlifies the optical mechanism of the compact disc or the optical filing system by using optical fibre. An optical fibre unit cable(6) has both a transmitting fibre(6A) and a receiving fibre(6B). The first branch(61) consists of the transmitting fibre sending laser light emitted from laser diode(1) to optical disc(4). The second branch(62) consists of the transmitting fibre(6A) sending laser light reflected from the disc(4) to the photodiodes. A collimator lens(2) ans a condensor lens(3) are used between a complex branch(63) and the optical disc(4) to produce parallel lights and condensing lights. |
