Device For Assisting In Finding An Article

摘要

An apparatus for assisting in finding an article such as a golf ball ( 2 ) includes a housing ( 3 ) containing a laser diode ( 4 ) for radiating an excitation beam ( 5 ) in the UV or IR bands. The apparatus has a receiving lens ( 9 ) for receiving a return beam ( 8 ) sent back from the golf ball ( 2 ) by the fluorescent coating on the ball. The return beam ( 8 ) falls on a photodiode receiver ( 10 ) after passing through two filters ( 11, 12 ) which filter out incident sunlight. Processing means ( 15 ) processes the signal received by the receiver and drives an indicator ( 18 ) in the form of a beeper or flashing light which indicates that the golf ball ( 2 ) has been sensed by the apparatus.