PURPOSE: To easily fix the optical parts with high accuracy by forming at least either of the optical parts and the main body frame by the synthetic resin material, and after the optical parts are positioned to the prescribed position of the main frame, melting the optical parts and the main body frame.
CONSTITUTION: The outer frame of a main body frame 11 and optical parts 12 is both formed by the synthetic resin material, and at the time of the fixing work, first, the optical parts 12 are fitted at a guiding part 13 of the main body frame 11 and the general positioning is executed. Next, to a notch recessed part 15 provided at a fixing plate 14 of the optical parts 12, the adjusting tool is fitted and the whole positioning is executed. When the positioning is completed, the solvent solution 17 is dropped on a projected part 16 formed at the fixing plate 14, melted and the fixing plate 14 is deposited to the main body frame 11 side. In such a fixing method, the optical parts 12 are never dislocated after the parts are positioned, and fixed to the positioned position easily and correctly.
TAKEGAWA KEIJI
KARASAWA TADAO
KOMAMURA HIDEYUKI
MAEDA MASAMI
SUDA KAZUYUKI
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