Title:
NON-CONTACT DIGITIZING METHOD
Document Type and Number:
Japanese Patent JPH03269207
Kind Code:
A
Abstract:
PURPOSE:To obtain the coordinates of reflected light on an axis Z based on the coordinates on a screen by specifying the orthogonal direction from the surface of a table as the direction of Z, projecting laser light from a measuring head on the axis Z, picking up the image of the reflected light from a material to be measured with an image sensing means positioned at a specified angle with respect to the axis Z, and taking out only the reflected light. CONSTITUTION:An image sensing means 5 is fixed to a measuring head 1 at an angle thetawith the axis Z. The original point of the axis Z is arranged on the upper surface of a table 2. Laser light 6 is projected on a material to be measured 3 from the upper part of the axis Z. The reflected light 7 is set by adjusting the image sensing range on the axis Z as L0 and the height from the lower limit of the image sensing range to the upper surface of the table as L2. The image is picked up with the image sensing means 5 of the head 1. Only the image of the reflected light 7 is processed in an image processing computer 8. Thus the height L1 of the reflected light 7 is obtained. When the number of the picture elements of the picked-up image is P0 X P0, the number of the picture elements from the lower end of the screen to the center of the reflected light 7 is made to be P1. When the height of the material to be measured 3 is changed, the image of the reflected light is moved up and down only on the same axial line in the screen. Therefore, the height L1 of the reflected light is obtained based on the value of P1. When the image sensing angle is changed by every 1/n of the picture elements and the images are picked up and synthesized, resolution of (n) times is obtained.
Inventors:
NAGATSUKA HIDEKI
Application Number:
JP6994990A
Publication Date:
November 29, 1991
Filing Date:
March 19, 1990
Export Citation:
Assignee:
OSAKA KIKO CO LTD
International Classes:
G01B11/24; B23Q35/128; (IPC1-7): B23Q35/128; G01B11/24
Attorney, Agent or Firm:
Shogo Ehara
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