| 摘要 |
PURPOSE: An automatic focus adjusting apparatus in an ultraviolet optical machine for airplanes based on temperature difference is provided to simplify the ultraviolet optical machine. CONSTITUTION: A lens assembly(202) includes at least one lens. A focus adjusting unit(203) is expanded to the optical axis direction of the lens, and one end of the focus adjusting unit is fixed to the lens assembly. The focus adjusting unit is contracted or expanded according to the change of surrounding temperature. A supporting unit(204) is expanded to the vertical direction of the optical axis, and one end of the supporting unit is combined with the lens assembly. |
