Method and apparatus for making a spatially selective high resol

Details Method and apparatus for making a spatially selective high resol Method and apparatus for making a spatially selective high resol

1996-03-05

1998-11-24

Shafer, Ricky D.

Optical: systems and elements

Polarization without modulation

Polarization by birefringence

359501, 359900, G02B 530

Patent

active

058415815

ABSTRACT:
A method and apparatus that bonds two orthogonally polarized plastic films into a single sheet, self aligned, orthogonally polarized filter. A laser heats regions of the films to depolarize localized regions in layers of the films, creating regions of different polarization that transmit only correspondingly polarized light, regions of complete depolarization which transmit all light, and regions of complete polarization which block light. The regions of varying polarization are produced by a computer controlled laser beam scanner and halfwave plate scanning a polarized laser beam light across the filter, such that the light is absorbed by regions of one of the films of the filter of opposite polarization, heating the film and depolarizing the regions of the layer absorbing the light.

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