Optics: measuring and testing – Lens or reflective image former testing – Optical center – cylinder axis – or prism measuring or...
Reexamination Certificate
2007-11-12
2010-06-22
Chowdhury, Tarifur (Department: 2886)
Optics: measuring and testing
Lens or reflective image former testing
Optical center, cylinder axis, or prism measuring or...
C356S124000, C359S704000, C359S823000
Reexamination Certificate
active
07742159
ABSTRACT:
An apparatus for checking concentricity between a barrel holder and a lens barrel rotatably engaging with the barrel holder is provided. The lens barrel includes at least one lens coaxially received therein. The apparatus includes a barrel holder retaining member, a rotating member, a driving unit, a light source, and an image sensor. The barrel holder retaining member is used for fixedly retaining the barrel holder in position. The rotating member is structured for meshing with the lens barrel. The driving unit is used for driving the rotating member to rotate, thereby rotates the lens barrel. The light source is configured for emitting light toward a first end of the lens barrel. The image sensor is arranged to face toward an opposite second end of the lens barrel. The image sensor is configured for sensing the light emitted from the light source.
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Chowdhury Tarifur
Hon Hai Precision Industry Co. Ltd.
Knapp Jeffrey T.
Lapage Michael
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