Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium
Patent
1998-06-09
2000-06-06
Mathews, Alan A.
Dynamic information storage or retrieval
Specific detail of information handling portion of system
Radiation beam modification of or by storage medium
369 4423, 352 11, G11B 700, G03B 3100
Patent
active
060727608
ABSTRACT:
To be capable of obtaining diffuse light with a sufficient amount of light, which is not susceptible to the influence of scratches of a film along the length direction, and to be capable of constructing the apparatus in a small size and at a low cost, a digital audio signal S track or P track is formed on the side of the film furtherest to the left of the left perforations or to the right of right perforations of a movie film, respectively. Light from an LED 51 is diffused by an elliptical diffuser 52, the diffusion angle of which is greater along the width direction of the film than along the length direction thereof, and is radiated onto the P track (or the S track). Then, the transmitted light which has passed through the P track (or the S track) is converged onto a line sensor 43A as a result of passing through a lens 42A, and the light is photoelectrically converted by the line sensor 43A, thereby reproducing digital sound.
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patent: 5471454 (1995-11-01), Tani
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patent: 5757465 (1998-05-01), Seagrave et al.
patent: 5761349 (1998-06-01), Inatome et al.
Fuller Rodney
Mathews Alan A.
Shaw, Jr. Philip M.
Sony Corporation
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