| 摘要 |
PURPOSE:To prevent the generation of condensation in optical parts by constituting an optical housing in such a manner that the inside thereof is shut off from the outdoor air and providing means for dehumidifying the inside of the optical housing. CONSTITUTION:The optical housing 12 consists of a casing 14 and a cover member 16 to close the aperture of the casing 14. A slit-like aperture 18 for leading laser light to be scanned to the outside is provided to the bottom of the casing 14. Dehumidifying agents 30a, 3b consisting of, for example, silica gel, magnesium chloride, active carbon, etc., are freely attachably and detachably provided to the casing 14 by utilizing corner parts thereof. A sealing member is applied into the housing 12 in order to construct the housing hermetically by the casing 14 and a cover member 16, by which the tightness thereof is additionally improved.
|
