发明名称 |
Device for illuminating an auxiliary track of a motion picture film |
摘要 |
A laser diode (4) emits a beam which is reflected by a plane mirror (12) and by a spherical focusing mirror (2) in order to form a beam (40) which is focused on a read window which is a segment of a read line (6). Said line extends transversely relative to a film (16) running over a drum (20) which rotates about an axis (22). The window occupies the width of the soundtrack on the film. The light passing through said soundtrack is received by a photo cell (34) which provides the sound signal. The invention is particularly applicable to sound motion pictures.
|
申请公布号 |
US4942566(A) |
申请公布日期 |
1990.07.17 |
申请号 |
US19880208617 |
申请日期 |
1988.06.20 |
申请人 |
SOCIETE ANONYME DITE: COMPAGNIE GENERALE D'ELECTRICITE |
发明人 |
GODARD, BRUNO |
分类号 |
G03B31/00;G03B31/02;G11B7/00;G11B7/003;G11B7/004;G11B7/135 |
主分类号 |
G03B31/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|