Molding diffractive optical elements

Details Molding diffractive optical elements Molding diffractive optical elements

1995-01-31

1998-03-17

Vargot, Mathieu D.

Plastic and nonmetallic article shaping or treating: processes

Optical article shaping or treating

Including step of mold making

264 131, 264 136, 264219, 2643281, B29D 1100

Patent

active

057283249

ABSTRACT:
A method of fabricating a diffractive optical element includes the steps of: etching a negative of a desired multi-level diffraction pattern onto a molding surface of a quartz master element using photolithography, assembling the master element as a portion of a mold, and injecting a plastic molding composition into the mold and against the molding surface of the master element to injection mold a diffractive optical element, whereby the optical element has the desired diffraction pattern on its surface. The diffraction pattern is preferably formed on the quartz master using VLSI photolithography.

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