Total internal reflection side emitting coupling device
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United States of America Patent
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Nov 30, 2010
Grant Date -
Jul 3, 2008
app pub date -
Dec 19, 2007
filing date -
Dec 19, 2006
priority date (Note) -
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status (Latency Note)
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Abstract
The present invention discloses a coupling lens system, which comprises a collimation lens for collimating light from light source to a first direction; a first lens surface for total internal reflecting light from light source to the first direction; and a second lens surface for total internal reflecting light from the first direction to a second direction. Wherein an angle between the first direction and the second direction can be larger than, smaller than or equal to 90 degrees, and preferably between 70 to 100 degrees. Additionally, the system further comprises at least one extra surface parallel to the second lens surface, wherein at least one extra surface has a length L and is parallel to each other. At the same time, each surface and another surface has a distance D in between, and the length L can be equaled to or larger than the distance D according to purposes and further modifies a shape of the coupling lens system.
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