JPS5682405A - Curvature correspondence read system - Google Patents

Curvature correspondence read system

Info

Publication number
JPS5682405A
JPS5682405A JP15909379A JP15909379A JPS5682405A JP S5682405 A JPS5682405 A JP S5682405A JP 15909379 A JP15909379 A JP 15909379A JP 15909379 A JP15909379 A JP 15909379A JP S5682405 A JPS5682405 A JP S5682405A
Authority
JP
Japan
Prior art keywords
read
point
curved surface
curvature
circle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP15909379A
Other languages
Japanese (ja)
Inventor
Kazuhiko Yoshinaga
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyo Electric Manufacturing Ltd
Original Assignee
Toyo Electric Manufacturing Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toyo Electric Manufacturing Ltd filed Critical Toyo Electric Manufacturing Ltd
Priority to JP15909379A priority Critical patent/JPS5682405A/en
Publication of JPS5682405A publication Critical patent/JPS5682405A/en
Pending legal-status Critical Current

Links

Landscapes

  • Length Measuring Devices With Unspecified Measuring Means (AREA)
  • Image Input (AREA)
  • Control Of Position Or Direction (AREA)

Abstract

PURPOSE: To read easily and also exactly by approximately using a quadratic equation of a circle, an oval, or a parabola, etc. as an expression corresponding to the curvature of the two-dimensional free curved surface or the three-dimensional free curved surface, calculating the coordinate value of a point where the read head is shifted, and executing the read by automatically shifting the read head.
CONSTITUTION: For instance, a quadratic equation showing a circle is approximated as an expression corresponding to the curvature of a free curve of the two- dimensional curved surface. The points P1, P2, P3 corresponding to the curvature are taken on the curved surface to be read, supposing its curvature, the center Pc3 of a circle passing through these three points is derived, and a tangential line T3 of the circle, passing through the point P3 is drawn. The coordinates of the point Q4 where a straight line g3 which passes through the point P2 and is in parallel with T3 intersects with the circular arcs P2, P3 are calculated. In accordance with this value, the read head is automatically shifted by Q4WP3, and also read is executed by making it approach the curved surface. The point P4 nealry coincides with the point Q4. Moreover, the tolerance δ can be calculated easily. Accordingly, read can be executed easily and also exactly.
COPYRIGHT: (C)1981,JPO&Japio
JP15909379A 1979-12-10 1979-12-10 Curvature correspondence read system Pending JPS5682405A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15909379A JPS5682405A (en) 1979-12-10 1979-12-10 Curvature correspondence read system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15909379A JPS5682405A (en) 1979-12-10 1979-12-10 Curvature correspondence read system

Publications (1)

Publication Number Publication Date
JPS5682405A true JPS5682405A (en) 1981-07-06

Family

ID=15686076

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15909379A Pending JPS5682405A (en) 1979-12-10 1979-12-10 Curvature correspondence read system

Country Status (1)

Country Link
JP (1) JPS5682405A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009092488A (en) * 2007-10-09 2009-04-30 Panasonic Corp Three-dimensional shape measuring method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009092488A (en) * 2007-10-09 2009-04-30 Panasonic Corp Three-dimensional shape measuring method

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