公开(公告)号：US3851948A

公开(公告)日：1974-12-03

申请号：US38530573

申请日：1973-08-03

Applicant: RCA CORP

Inventor： STEINMETZ C ,  GANGE R ,  NAGLE E

IPC: G03G16/00 ,  G03H1/02 ,  G02B27/00

CPC classification number: G03H1/02 ,  G03G16/00 ,  G03H2001/0264 ,  G03H2260/53

Abstract: A holographic memory system includes a transparent thermoplastic recording medium having a large area for the storage of a large number of individual holograms, a photoconductive layer, and at least one layer providing light absorption, electrical conductivity and physical support. The entire area of the thermoplastic storage medium is heated to a temperature just below the temperature at which the medium becomes plastic, and a uniform electric charge is placed on the thermoplastic recording medium. Means are provided to direct an object beam and a reference beam forming an individual hologram to and through a single selected small area of the storage medium and the photoconductor, whereby an electrically-conductive pattern is formed in the photoconductive layer which results in a corresponding charge pattern thereon. The object beam and the reference beam continue on to the light absorption layer, whereby heat generated in the light absorption layer causes solely the small area of the recording medium to become plastic, so that it can assume a physical pattern determined by the charge pattern.

Abstract translation: 全息存储系统包括具有大面积的透明热塑性记录介质，用于存储大量单独的全息图，光电导层以及提供光吸收，导电和物理支撑的至少一个层。 将热塑性存储介质的整个区域加热到刚好低于介质变为塑料的温度的温度，并且在热塑性记录介质上放置均匀的电荷。 提供了用于将物体光束和形成各个全息图的参考光束引导到存储介质和光电导体的单个选定的小区域并且通过光电导体的单个选定的小区域的方式，由此在光电导层中形成导电图案，导致相应的电荷 图案。 物体光束和参考光束继续到光吸收层，由此在光吸收层中产生的热量仅使记录介质的小面积变得塑性，从而可以采取由电荷图案确定的物理图案。