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Position measurement system

  • US 6,985,236 B2
  • Filed: 09/12/2003
  • Issued: 01/10/2006
  • Est. Priority Date: 01/08/2003
  • Status: Expired due to Fees
First Claim
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1. A position measurement system comprising:

  • a light source;

    an optical lens system which transmits light from the light source and forms an area of light concentration due to its spherical aberration;

    a light receiving device which detects the area of light concentration as formed by the optical lens system; and

    a calculator which measures a position of the light source according to detected information on the area of light concentration as detected by the light receiving device.

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