| 摘要 |
PROBLEM TO BE SOLVED: To efficiently adjust the optical axial direction and rotational direction of a lens module and a light-receiving element module. SOLUTION: There are provided a lens module 1 which converges and focuses the incident light, a light-receiving element module 4 which house a light- receiving element to receive the light passing the lens, and an adjusting jig 7 to which a temporary assembled body 60 where the lens module 1 and the light-receiving element module 4 are temporarily assembled is set and which is detachable to an adjusting device 61 to which a chart 29 for optical adjustment is fitted. The adjusting jig 7 comprises a fixing means which aligns and fixes the lens module 1 of the temporary assembled body 60, and aligning means 18 and 19 which align the light-receiving element module 4 with the lens module 1 in the optical axial direction and rotational direction and then keep the aligned state.
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