| 摘要 |
PURPOSE:To solve a trouble due to a cable by omitting a signal cable connected between a main body and a test head. CONSTITUTION:A tester is equipped with the main body 11 and the test heads 12 (12a, 12b). The transfer of a signal between the main body 11 and the test heads 12 is performed by a laser beam in spatial fashion. Therefore, a main body side optical transmitter/receiver 14 is mounted on the main body 11, and head side optical transmitter/receivers 15a, 15b on the test heads 12a, 12b. Infrared rays are used as the laser beam. Also, sharp directivity is attached to the laser beam. |
