Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Jeffrey J. Blanco0
Dwayne D. Forsyth0
Steven Devick0
W. Scott Tobey0
Date of Patent
June 15, 2010
Patent Application Number
12650280
Date Filed
December 30, 2009
Patent Citations Received
Patent Primary Examiner
Patent abstract
A device may include a magnifying lens having a focal length that defines a focal plane, a light source providing visible light directed toward the focal plane, and a controller. The controller may be programmed to receive a signal indicative of the distance from the device to an object, cause the light source to emit visible light at a first brightness if the distance is at least substantially equal to the focal length of the lens, and cause the light source to emit visible light at a second brightness, dimmer than the first brightness, if the distance is not at least substantially equal to the focal length of the lens.
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