Optical: systems and elements – Lens – Fluid
Reexamination Certificate
2008-03-11
2008-03-11
Lester, Evelyn A. (Department: 2873)
Optical: systems and elements
Lens
Fluid
C359S665000, C359S773000
Reexamination Certificate
active
07342726
ABSTRACT:
An autofocusing optical system of a camera module which can be installed in a subminiature camera module. In the optical system, a first lens group has an overall positive refractive power. A second lens group has an overall negative refractive power. The second lens group includes a liquid lens having a meniscus formed between non-miscible first and second liquids, the first liquid having conductivity and polarity, the meniscus having a curvature radius changing in response to a voltage applied to serve as a refractive surface, thereby autofocusing the optical system, a first cover lens for sealing the liquid lens at an object side and a second cover lens for sealing the liquid lens at an image side. A third lens group has an overall positive refractive power. Also, a fourth lens group has an overall negative refractive power.
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Lester Evelyn A.
Samsung Electro-Mechanics Co. Ltd.
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