Recording and reproducing device

Abstract

Abstract PURPOSE:To enhance reliability against vibration from outside and to simplify constitution by dealing with a device when it is detected that the intensity of vibration applled to the device exceed a specified value. CONSTITUTION:A light beam from a light source 3 is irradiated on a recording medium 1 through a convergent lens 9, and reflected light is inputted to photodetectors 12 and 13 throught the lens 9 and a splitter 6, and each detected output is supplied to a tracking control system and a focus control system. A detector 24 that detects accelaration applied from outside, a detector 30 that detects acceleration applied from outside perpendicular to the face of the recording medium 1 and a detector 31 that detects acceleration of vibration impressed in the direction nearly perpendicular to the direction of shifting of a carrying stand 15 in the face of the record carrier 1 are provided on a frame 25 that holds the recording medium 1. Each detection output is inputted to an abnormality detecting circuit 32, and when acceleration impressed to the device is larger than a specified value, an abnormality signal is outputted. Thereby, an information processing controlling device 34 prohibits recording action, transmits the abnormality to external instruments, and executes a self-diagnosis of the device.

Inventors

• 👤 Mitsuro Moriya
• 👤 充郎 守屋
• 👤 Kazuharu Shiragami
• 👤 白神　和治
• 👤 Hiroyuki Yamaguchi
• 👤 博之 山口

Bibliographic Details