| 摘要 |
<p>An optical sight to be used in playing golf to control and measure any shift of the golfer's head during the execution of a stroke, i.e. the lifting up of the golf club and the successive downward movement thereof to hit the ball (PL), consisting of a reference pattern (11) of suitable shape providing a fixed reference point which is crossed by the line (LC) of 'aim' connecting the golfer's pupil (OC) to the ball (PL) so that any shift of the golfer's head can be sensed, corrected and eliminated.</p> |
