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Optical Systems

Light-control-film-with-reduced-ghost-images

Optical recording/reproducing apparatus for optical disks with various disk substrate thicknesses

In consideration of the above drawbacks, it is an object of the invention to provide an optical ...

High resolution imagery systems and methods

Systems and methods in accordance with the invention dispose at least one holographic areally ...

Compound objective lens having two focal points

A first object of the present invention is to provide, with due consideration to the drawbacks of ...

Superresolution scanning optical device

A first superresolution scanning optical device according to the present invention comprises image ...

Method and apparatus for storage and retrieval with multilayer optical disks

The present invention offers a three-dimensional optical disk storage with significantly decreased ...

Optical head

Accordingly, it is an object of the invention to provide an optical head in which a diameter of a ...

Light beam shaping device to change an anisotropic beam to an isotropic beam for reducing the size of an optical head

It is therefore an object of the present invention to provide a new and improved optical head ...

Method of using a single pick-up head to read and store data on discs of different thicknesses and structure of a pick-up head apparatus therefor

The present invention has been accomplished under the circumstances in view. According to the ...

Optical head and optical data recording and reproducing apparatus having the same

According to one aspect of the invention, the optical head for reproducing data from first and ...

Device for optically scanning a recording medium by focusing the best focus or the paraxial focus to the information layer

It is an object of the invention to provide a device for optically scanning a record carrier, which ...

Light control film with reduced ghost images

Details

Inventors: Melby, Jeffrey J.; Theirl, Scott G.;
Assignee: Minnesota Mining and Manufacturing Company (St. Paul, MN)
Primary Examiner: Ryan; Patrick J.
Assistant Examiner: Bahta; Abraham
Attorney, Agent or Firm: Griswold; Gary L., Kirn; Walter N., Buckingham; Stephen W.

A louvered plastic film has louvers including central regions with a relatively high coefficients of extinction and outer regions with relatively low coefficients of extinction. Such a film provides a dramatic reduction in ghost images.

DETAILED DESCRIPTION According to the invention, a louvered plastic film has a plurality of clear regions separated by louvers.
Each louver has a central region with a relatively high coefficient of extinction and outer regions, adjacent said clear regions, having relatively low coefficients of extinction.

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