通常为长方形的狭窄缝隙，光线或其他辐射通过它进来（如分光镜的准直管）或出去(如从黑体空腔)
线型的房子顶部是陡峭的屋顶，屋顶由反射光的直立缝金属面板组成。
The rectilinear home is topped with a steep roof that consists of standing-seam metal panels, which reflect light.
讨论了合成的记录光路和为避免二物体的再现象之间互相干扰，二物体的间距和缝间距的选择所应满足的条件。
Discusses the joining recorded optical circuit and the selecting conditions of the distance between objects and between slits to rid of interference from either of two images.
在显微物镜的成象光路中，增加一块振荡反射镜，使被测线宽的放大象相对窄缝扫描，将光学边界信息转变为梯形电脉冲。
Bying adding an oscillator mirror in the imaging path, thus the enlarged image will be scanned by the narrower slit, and the optical boundary information is converted into gradient electrical pulse.
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