论文信息 - Strehl ratio versus defocus for noncentrally obscured pupils.

Strehl ratio versus defocus for noncentrally obscured pupils.

We discuss from the viewpoint of the Strehl ratio versus defocus, or the normalized axial-irradiance distribution, the influence of decentering the dark mask of an annular pupil. Our treatment, which is valid for pupil apertures with any Fresnel number, permits us to infer that the axial behavior of a noncentrally obscured pupil is equivalent to that of an apodizer with continuous amplitude variations. Hence the Strehl ratio versus defocus of an optical system can be shaped by use of noncentered dark masks that act as continuous gray apodizers. Several numerically evaluated examples are presented.

[1] A Pons,et al. Apodization of annular apertures: Strehl ratio. , 1988, Applied optics.

[2] M Martínez-Corral,et al. On-axis diffractional behavior of two-dimensional pupils. , 1994, Applied optics.

[3] C. McCutchen. Generalized Aperture and the Three-Dimensional Diffraction Image , 1964 .

[4] E. Friedman. On-axis irradiance for obscured rectangular apertures. , 1992, Applied optics.

[5] E. Wolf,et al. Focal shifts in diffracted converging spherical waves , 1981 .

[6] Imaging with noncentrally obscured circular pupils , 1978 .

[7] J Ojeda-Castañeda,et al. Arbitrarily high focal depth with finite apertures. , 1988, Optics letters.

[8] Pedro Andrés,et al. Strehl ratio with low sensitivity to spherical aberration , 1988 .

[9] S. A. Mani,et al. Fraunhofer diffraction patterns from uniformly illuminated square output apertures with noncentered square obscurations. , 1976, Applied optics.

[10] M Martínez-Corral,et al. Zero axial irradiance by annular screens with angular variation. , 1992, Applied optics.