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Contrast enhancement filter
| Details |
Inventors: Butterfield, William F.; Chang, Kuang-Chou; McLelland, Edmund J.; Polizzotto, Leonard;
Assignee: Polaroid Corporation (Cambridge, MA)
Primary Examiner: Arnold; Bruce Y.
Assistant Examiner:
Attorney, Agent or Firm: Xiarhos; Louis G.
A contrast enhancement filter having antistatic and antireflection properties is disclosed. The article comprises a plastic support sheet carrying on one side thereof a layer of indium tin oxide, and superposed upon said layer, an antireflection layer. A light-polarizing element is affixed to the opposed side thereof. The contrast enhancement filter can be used for the reduction of specular glare from the surface of cathode ray tubes, computer display screens and the like. |
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DETAILED DESCRIPTION It has been found that a contrast enhancement filter having desirable antistatic and antireflection properties can be provided in the form of a plastic article which comprises a transparent plastic sheet carrying on one side thereof indium tin oxide and antireflection layers, and having a plastic light-polarizing element on the opposed side of the plastic sheet.
Accordingly, the present invention provides a contrast enhancement filter having antistatic and antireflection properties, the filter comprising a transparent plastic sheet carrying on one side thereof, a layer of indium tin oxide, and superposed upon the indium tin oxide layer, an antireflection layer, and having affixed to the opposed side of the plastic sheet, a light-polarizing element.
The contrast enhancement filter, and the features, properties, advantages and applications thereof, will be better understood by reference to the detailed description of the invention provided hereinafter and the accompanying drawings.
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Manufacturing Materials 
