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Non-contact type measuring device for measuring three-dimensional shape using optical probe

  • US 5,410,410 A
  • Filed: 12/29/1992
  • Issued: 04/25/1995
  • Est. Priority Date: 12/29/1992
  • Status: Expired due to Fees
First Claim
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1. A non-contact type shape measuring device for measuring a 3-D shape, comprising:

  • (a) an optical probe having a plurality of sensor units which are attached to a probe body having a spherical surface facing a to-be-measured object and whose detective surfaces lie on said spherical surface, said sensor units including illuminating means having an illuminating point arranged at the center of the detective surface facing said to-be-measured object and at least eight light receiving means arranged on two axes passing said illuminating point in said detective surface for receiving a reflected light from said to-be-measured object, light receiving points of said eight light receiving means being symmetrically arranged on said two axes with respect to said illuminating point with four of said light receiving means disposed on each of said two axes; and

    (b) processing means for deriving normal vectors in the position of said to-be-measured object which are illuminated by said sensor units and gap distances between said sensor units and said to-be-measured object which are illuminated by said sensor units and gap distances between said sensor units and said to-be-measured object according to output signals of said sensor unit.

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