Constant magnification lens for vision system camera

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United States of America Patent

PATENT NO 9715612
SERIAL NO

14139867

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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This invention provides a lens assembly for a vision system, allowing for a constant magnification at various focal distances. The lens assembly resides movably/adjustably along the optical axis relative to the sensor. In an embodiment, the lens assembly includes a fixed rear lens and a front lens that is moved mechanically to focus the object image on the image sensor. The lens assembly can alternatively include a liquid lens that is controlled to adjust magnification with respect to a fixed front lens so as to maintain a constant system magnification. The liquid lens resides between the (fixed) front lens assembly and the image sensor and can be controlled to focus the image onto the image sensor.

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Patent Owner(s)

  • COGNEX CORPORATION

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Nunnink, Laurens Simpleveld, NL 127 1425

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