nj-patents : (us 20040246494)

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U S 20040246494A1 12) Patent Application Publication 10) Pub. No.: U S 2004/0246494 A1 19) United States L i et al. 43) Pub. Date: Dec. 9 , 2004 (54) SCANNING APPARATUS (76) Inventors: Perry Y . Li, Roseville, MN US); Chuanqi Chen, Minnetonka, MN US); Arthur G . Erdman, New righton, US); Zhang Hong, MN US); John Byron Raymond, Lakeville, MN US) Correspondence Address: Attention of Gregory . Sebald MERCHANT GOULD .C. P.O. Box 2903 Minneapolis, MN 5402-0903 US) (21) Appl. No.: 10/712,802 (22) Filed: Nov. 12, 2003 Related US. pplication Data 63) Continuation of application No. 09/426,385, ?led o n Oct. 25, 1999, noW abandoned. Publication Classi?cation 51) rm.c1.7 ................................................... .. G01B 11/24 52) Us. 1 . ............................................................ ..356/601 (57) ABSTRACT A canning apparatus includes a support frame and a laser scanner mounted to the frame. ve bar closed loop spherical linkage supports a clamping device for retaining a n object. The linkage moves the object through a scanning beam about a spherical surface to facilitate scanning of curved objects. The linkage is mounted on a n arm rotatably mounted o the frame and the clamping device is rotatably mounted o the linkage t o provide four degrees of freedom. Encoders and motors drive the linkage t o provide accurate positioning and providing for digitizing the scanned object. 100 1 J L

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