ILLUMINATION DEVICE AND PHOTOGRAPHIC DEVICE HAVING THE SAME
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United States of America Patent
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Issued Date -
Jul 9, 2015
app pub date -
Dec 31, 2014
filing date -
Jan 3, 2014
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Abstract
An illumination device includes a light source and a reflective cup. The light source is for emitting a first beam and a second beam. A light intensity of the first beam is greater than a light intensity of the second beam. The reflective cup has a plurality of reflecting curved surfaces and a through hole formed by the plurality of reflecting curved surfaces. Each reflecting curved surface has a first reflective section and a second reflective section. A slope of the first reflective section is different from a slope of the second reflective section. The first beam is reflected to an off-axis region by the first reflective section. The second beam is reflected to a paraxial region by the second reflective section, such that a light intensity in the off-axis region is greater than a light intensity in the paraxial region.
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