| 摘要 |
PROBLEM TO BE SOLVED: To provide optical equipment constituted so that a fungicidal effect can be maintained for a long period by imparting the fungicidal effect to a place away from a fungicidal member. SOLUTION: An interchangeable lens has several lenses 11 to 16 provided in a leans barrel which is constituted of an external moving barrel 17, an inner moving barrel 18 and a mount part 24. Fungicidal processing parts 1 to 4 are formed on the inner surface of the lens barrel. The fungicidal processing parts 1 to 4 have a two-layer structure constituted of an undercoat including transpiration type fungicide and a topcoat not including the transpiration type fungicide. By varying the thickness of the topcoat and the kinds of coating material, the transpiration speed of the transpiration type fungicide included in the undercoat can be controlled. By making the topcoat thicker, for example, the topcoat in the fungicidal processing parts 2 to 4 arranged in the open spaces 8 and 9, the transpiration speed is suppressed, and the fungicidal effect is maintained for a period longer than in the conventional manner. COPYRIGHT: (C)2003,JPO
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