| 摘要 |
PROBLEM TO BE SOLVED: To simplify the configuration of an alignment jig for simplifying the aligning operation by allowing a second lens unit used for alignment to employ an adjusting method including only rotational adjustment. SOLUTION: The optical unit is provided with a first lens unit 13 composed of a first lens frame 12 holding a first lens system 11, and a second lens unit 17 composed of a second lens frame 16 holding a second lens system 15. The outer peripheral surface of the second lens frame is rotatably held by the inner peripheral surface of the first lens frame. The lens frames are so configured that the optical axis of the first lens system is eccentric by a prescribed value from the optical axis of the second lens system. At alignment work, in the process in which the second lens unit is rotated relative to the first lens unit, the optical axis of the second lens system reaches such position as agrees with the optical axis of the first lens system or gets close to the optical axis of the first lens system. COPYRIGHT: (C)2003,JPO
|
