| 摘要 |
<p>PURPOSE:To enable a non-contact and short-time measurements by a method wherein a reflecting faceplate is fixed on a hosel part or a club shaft in such a manner as to make the surface vertical to the shaft axis and a laser beam is projected to read graduation at the projection point on a screen. CONSTITUTION:A club head 1 is positioned and fixed at a specified fixing position with the face surface 1a as reference. A reflecting faceplate 2 is fixed at a specified position on a hosel part 1b vertical to the shaft axis a-a. A laser beam L irradiated from an oscillator 3 is reflected through the reflecting faceplate 2 and projected on a fixed screen 4. A gradation 5 is drawn on the screen 4 beforehand with the loft angle x on the axis of abscissa and the lie angle (y) on the axis of ordinate according to the number of clubheads. The loft angle and lie angle of clubheads are measured according to the number by reading the projection point of the laser beam L.</p> |
