Optical: systems and elements – Single channel simultaneously to or from plural channels – By partial reflection at beam splitting or combining surface
Reexamination Certificate
2006-09-28
2009-12-22
Spector, David N (Department: 2873)
Optical: systems and elements
Single channel simultaneously to or from plural channels
By partial reflection at beam splitting or combining surface
C359S630000
Reexamination Certificate
active
07636199
ABSTRACT:
The field of the invention is that of optical devices allowing the superposition of an electronic image on an image coming from an external scenery. The subject of the invention is an optical device for superposing images, designed to be positioned in front of an optical module comprising at least an objective and a photosensitive surface positioned in the focal plane of said objective. The device comprises an image source, an optical relay and an optical combiner formed of two optical parts assembled via an approximately plane common face including a weakly reflective coating. The combiner has the general form of a plate with plane parallel faces, the common face being inclined at around 45 degrees to said plane faces. It has an entrance face and a opposing face that are approximately perpendicular to the plane faces, the opposing face having approximately the form of a reflecting spherical surface. This device applies in particular to night vision goggles where, when the optical combiner is placed in front of the objective of a goggles body, it allows superposition of an electronic image on the external scenery while introducing marginal attenuation.
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U.S. Appl. No. 08/258,219, filed Jun. 10, 1994, Jean-Michael Francois (Never Published, Abandoned).
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Bourgain Jean-Louis
Francois Jean-Michel
Lowe Hauptman & Ham & Berner, LLP
Spector David N
Thales
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