ELECTROOPTICAL PROBE

摘要

PROBLEM TO BE SOLVED: To provide an electrooptical probe where the diameter of a probe has been made thin. SOLUTION: Light being separated by beam splitters 5a and 7a is folded back by 90 degrees with reflection surfaces 5c and 7c and the light axis of a laser beam that is emitted from a laser diode 9 is made parallel with that of light entering photodiodes 12 and 13, thus arranging the photodiodes 12 and 13 flush with the laser diode 9, thus eliminating a space for arranging the photodiode in the diameter direction of a probe body 15.