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    • 2. 发明授权
    • Apparatus for measuring parameters of light spots with a moving
knife-edge mask
    • 用移动的刀刃掩模测量光斑参数的装置
    • US4663524A
    • 1987-05-05
    • US823017
    • 1986-01-27
    • Michael T. GaleHeinrich Meier
    • Michael T. GaleHeinrich Meier
    • G01J1/42H01J3/14
    • G01J1/4257
    • A two-dimensional knife edge mask comprised of an array of spaced periodic rectangular opaque regions (e.g., a chrome grating pattern layer deposited on one surface of a slide) separated by transparent different given spacing stripes between adjacent rectangular regions in each of the two orthogonal dimensions thereof, is linearly moved at a fixed velocity across an incident light spot, the direction of movement being oblique to the orthogonal dimensions of the rectangular regions and the distance of movement being sufficient to traverse at least one entire spacing strips in each of the two orthogonal dimensions. A photocell (which may be secured to the other side of the slide) senses the occulted light.
    • 二维刀刃掩模由两个间隔的周期性矩形不透明区域(例如,沉积在载玻片的一个表面上的镀铬光栅图案层)阵列组成,在两个正交的每一个中的相邻矩形区域之间分开的透明不同的给定间隔条纹 其尺寸以穿过入射光点的固定速度线性移动,移动方向与矩形区域的正交尺寸倾斜,并且移动距离足以穿过两者中的每一个中的至少一个整个间隔条 正交尺寸。 光电管(其可以固定到幻灯片的另一侧)感测到隐蔽的光。
    • 3. 发明授权
    • System for positioning a body
    • 用于定位身体的系统
    • US4523850A
    • 1985-06-18
    • US434316
    • 1982-10-14
    • Robert L. CoveyMichael T. Gale
    • Robert L. CoveyMichael T. Gale
    • G11B3/56G11B21/00G05D1/10
    • G11B3/56G11B21/00
    • A system for positioning a body having two opposed edges and having a first axis oriented to pass through the two edges. A beam of light oriented along a second axis orthogonal to the first axis images one or both of the edges onto all or a portion of a photodetector array which is aligned in a direction parallel to the first axis. The array is scanned to obtain a light intensity transition profile of all or part of the projected image whereby the profile has either one or two 50% intensity points. The body is then shifted until both of the 50% intensity points strike predetermined locations on the array indicating that both the edges are included in the image. The body is shifted along the first axis until the fifty percent (50%) intensity point along the transition profile strikes a predetermined location along the photodetector array. The body is also moved along the second axis until the slope of the intensity transition profile is maximized, thereby obtaining an in-focus position. The body is then translated along a third axis, substantially orthogonal to the first and the second axes, until the minimum in the intensity transition profile drops to a predetermined percent of the full intensity value.
    • 一种用于定位具有两个相对边缘并具有定向成穿过两个边缘的第一轴线的主体的系统。 沿着与第一轴正交的第二轴定向的光束将一个或两个边缘映像到在与第一轴平行的方向上对齐的光电检测器阵列的全部或一部分上。 扫描阵列以获得投影图像的全部或部分的光强度转变轮廓,由此轮廓具有一个或两个50%的强度点。 然后移动身体,直到50%的强度点都撞击阵列上的预定位置,指示两个边缘都包括在图像中。 主体沿着第一轴移动,直到沿着转换轮廓的50%(50%)强度点沿着光电检测器阵列撞击预定位置。 主体也沿着第二轴线移动,直到强度转换轮廓的斜率最大化,从而获得对焦位置。 然后,主体沿着与第一和第二轴基本正交的第三轴平移,直到强度转变轮廓中的最小值下降到全强度值的预定百分比。