Method and apparatus for producing a relief pattern with a micro

Details Method and apparatus for producing a relief pattern with a micro Method and apparatus for producing a relief pattern with a micro

1987-01-29

1988-08-02

Lowe, James

Plastic and nonmetallic article shaping or treating: processes

Optical article shaping or treating

Utilizing plasma, electric, electromagnetic, particulate, or...

264 14, 264 17, 264 27, 264 25, 264 401, 264293, 425150, 4251744, 425385, B29D 1100, B29D 5902

Patent

active

047612533

ABSTRACT:
A method and apparatus for embossing a pattern having a microscopic relief structure, such as, for example, an optical diffraction grating, onto a layer of thermoplastic material is disclosed. A small circular region of a flexible embossing die is pressed against the thermoplastic layer by means of a punch. A fraction of the corresponding small circular region of the thermoplastic layer is then heated from the rear by a beam of radiant energy. The process may be repeated at all points on the thermoplastic layer where the pattern is desired.

REFERENCES:
patent: 3170008 (1965-02-01), Levine
patent: 4223050 (1980-09-01), Nyfeler et al.

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