Avendaño-Alejo M, Díaz-Uribe R
Centro de Ciencias Aplicadas y Desarrollo Tecnológico, Universidad Nacional Autonoma de Mexico, México Distrito Federal.
Appl Opt. 2006 Apr 20;45(12):2607-14. doi: 10.1364/ao.45.002607.
We propose the design of tilted null screens for testing off-axis segments of conic surfaces. The tilt allows us to control the size of the screen and the sensitivity of the test. For positive tilt angles the sensitivity is increased while the size of the screen is reduced in the sagittal caustic region and vice versa in the tangential caustic region. Further analysis and preliminary experimental results are presented for a fast off-axis concave parabolic mirror with an elliptical aperture. An offset distance of X(C) = 25.4 mm yields radius of curvature at the vertex R = 20.4 mm; major axis of the mirror D(M) = 49.4 mm; and minor axis D(m) = 29.5 mm.
我们提出了倾斜零位屏的设计方案，用于测试圆锥曲面的离轴部分。倾斜使我们能够控制屏幕的尺寸和测试的灵敏度。对于正倾斜角，在子午焦散区灵敏度增加而屏幕尺寸减小，在弧矢焦散区则相反。本文给出了对具有椭圆形孔径的快速离轴凹抛物面镜的进一步分析和初步实验结果。X(C)=25.4毫米的偏心距产生顶点处的曲率半径R = 20.4毫米；镜面的长轴D(M)=49.4毫米；短轴D(m)=29.5毫米。
