Flashlight producing uniform high brightness
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United States of America Patent
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Jun 8, 2004
Grant Date -
Aug 29, 2002
app pub date -
Feb 5, 2002
filing date -
Feb 6, 2001
priority date (Note) -
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status (Latency Note)
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Abstract
A flashlight that generates a flashlight beam to illuminate an object at a selectable distance from the flashlight by imaging a uniformly bright pattern of light onto the object. A light modifying component can be used to manipulate the pattern of light into particular shapes and images. In one embodiment, light from a light source is coupled into a light pipe. The light is homogenized as it travels along the light pipe. The light exits the light pipe with a more uniform intensity than when it entered. The light exiting the light pipe is then reimaged by an imaging lens onto an object. Yet in other embodiments, one or more lens arrays having two or more lenlets are used to homogenize the light originating from the light source.
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