| 摘要 |
PCT No. PCT/DE91/00746 Sec. 371 Date Apr. 16, 1993 Sec. 102(e) Date Apr. 16, 1993 PCT Filed Sep. 19, 1991 PCT Pub. No. WO92/07357 PCT Pub. Date Apr. 30, 1992.A circuit arrangement for scanning optical recording carriers comprises a scanning device, a first control loop for focusing a light beam of the scanning device directed onto the information plane of the recording carrier and a second control loop for guiding the light beam on an information track. The first control loop exhibits a first control amplifier which is supplied with focus error signals and the second control loop exhibits a second control amplifier which is supplied with track error signals. The control amplifiers drive actuators which mechanically guide the scanning device. To compensate for the temperature response of the control gain, controlling elements connected to temperature sensors via gain controllers are arranged in the first and second control loop, which controlling elements temperature-dependently change the gains.
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