DATA READOUT SYSTEM FROM OPTICAL MEDIA

摘要

The invention relates to information technology and can be used in systems of archival data storage. The proposed system relates to readable data system which gets the information from the optical disk WORM- type (one-time recording and re-reading) where the substrate is made of a highly- stable mono-crystalline material. Given system of archival data storage consists of a laser, focusing lens, beam splitting cube many surface photo-detector sensor, a diffraction grating and the quarter-wave plate. The system is distinguished from others in that that between the focusing lens and carrier information is available a mono-crystalline plate, which has a inverse value of the difference of the refractive indices of the ordinary and extraordinary rays to the value of the difference of the refractive indices of the ordinary and extraordinary rays for substrate of optical disk. For a highly stable optical disc substrate material for long-term storage and compensating plate for reading out optical systems is proposed to use sapphire or quartz.