DEVICE AND METHOD FOR MEASURING OPTICAL PICKUP AND/OR OPTICAL DISK CHARACTERISTIC, OPTICAL DISK RECORDING AND/OR REPRODUCING DEVICE AND OPTICAL DISK REPRODUCING METHOD

摘要

PROBLEM TO BE SOLVED: To provide a precise and inexpensive optical pickup and/or optical disk characteristic measuring device, etc. ;SOLUTION: In a characteristic inspecting device 1, the outputs of the photodetector of the optical pickup 2 are supplied directly to sample/hold circuits 8a-8f as signals A-F. In the sample/hold circuits 8a-8f, a multiplexer 9 and a second analog/digital conversion circuit 10, the signals A-F are converted to the digital data at a sampling frequency of 50 kHz or above. In a computer 12, an operation processing part 12d reads out a prescribed program from a data storage part 12b stored with a level measurement program P, etc., of an RF signal. The operation processing part 12d operates prescribed measurement items based on the digital data stored in a second memory 11 to measure the characteristic of the optical pickup 2.;COPYRIGHT: (C)1999,JPO