Photography – Having variable focal length of camera objective
Reexamination Certificate
2011-04-19
2011-04-19
Blackman, Rochelle-Ann J (Department: 2862)
Photography
Having variable focal length of camera objective
C396S082000, C396S085000, C396S121000, C396S429000, C348S347000, C359S676000
Reexamination Certificate
active
07929850
ABSTRACT:
Provided is a method and apparatus for measuring a distance between an object and a user using a camera module. According to the method, when the camera module is driven, a zooming function is performed to examine whether an image is formed on an image device. When the zooming function is completed, a focusing function is performed to examine whether focusing is adjusted. When focusing is adjusted, a focal length “f” and a distance “b” between a lens and the image device are calculated. Thereafter, a distance “a” between an object and a user is calculated and displayed using a lens Equation. Since a distance between a desired object and a user can be measured only using a zoom function and a focusing function of an existing camera module without a separate distance measurement device, the distance between the desired object and a user can be easily measured without increase in a volume of an apparatus or manufacturing costs.
REFERENCES:
patent: 2002/0080257 (2002-06-01), Blank
patent: 2007/0031136 (2007-02-01), Kakkori
patent: 1993-119252 (1993-05-01), None
Lee Chang-Ki
Yoon Chang-Hyun
Blackman Rochelle-Ann J
Samsung Electronics Co,. Ltd.
The Farrell Law Firm P.C.
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