Large, nonplanar poly(methyl methacrylate) pre-holographic eleme

Details Large, nonplanar poly(methyl methacrylate) pre-holographic eleme Large, nonplanar poly(methyl methacrylate) pre-holographic eleme

1976-03-29

1978-02-28

Hoffman, James R.

Plastic and nonmetallic article shaping or treating: processes

Optical article shaping or treating

Including step of mold making

264 22, 264134, 427 53, 427163, 427339, B05D 138, B05D 506, B05D 704, G02B 532

Patent

active

040767728

ABSTRACT:
A method for manufacturing large, nonplanar, transparent, gelatin-coated ymer sheets is disclosed. These sheets when sensitized, exposed, and developed can record and display holograms. A poly(methyl methacrylate) sheet is coated with nitrocellulose, the nitrocellulose is denitrated, and a gelatin solution is applied, then hardened. The sheet with its gelatin film is then thermally formed to any desired three-dimensional configuration.

REFERENCES:
patent: 3928108 (1975-12-01), Adicoff et al.

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