| 摘要 |
PURPOSE:To prevent a generation of a mold in an inside of the titled device by coating a coating material contg. a vaporizable mildew proofing agent on a place except an inner optical path, thereby making the mildew proofing atmosphere in the inside of the optical instrument. CONSTITUTION:The mildew proofing atmosphere is formed by coating the coating material contg. a mixture of one or more kinds of the vaporizable mildew proofing agents on the place except the optical path of the inside of the optical instrument. Especially, the most preferable mildew proofing agent comprises alpha-brom cinnamaldehyde, 4-chloro-m-cresol and 4-chloro-3,5-xylenol. As the pharmaceutical activity is different by kinds of the mold, a wide antibacterial spectrum is obtd. by combining >=2 kinds of the agents. The pharmaceutical activity may be persisted for long periods by displaying the activity of the agent having a high vapor pressure at the beginning of the period, and by displaying the activity of the agent having a low vapor pressure at the later periods due to the combination of the agents having the different vapor pressures.
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