Physics – Optics
Scientific paper
May 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apopt..31.2188r&link_type=abstract
Applied Optics (ISSN 0003-6935), vol. 31, no. 13, May 1, 1992, p. 2188-2193. Research supported by AT&T Bell Laboratories.
Physics
Optics
2
Aberration, Geometrical Optics, Image Processing, Optical Correction Procedure, Wave Front Deformation, Nonlinear Optics, Optical Materials
Scientific paper
Distortion can be corrected in an image by placing a fourth-order aspheric optical element near the image plane. Moving the aspheric surface longitudinally changes the amount of distortion that is added by the aspheric surface without changing the paraxial image. Third-order astigmatism limits the performance of distortion correctors and may be eliminated by adding another fourth-order aspheric surface. Example elements were fabricated by diamond turning and were shown to introduce distortion without significantly degrading image quality. Three arrangements of distortion correctors are discussed: a single-element planoaspheric arrangement, an antisymmetric two-element arrangement, and a biaspheric arrangement in which distortion is not adjustable.
Chipman Russell A.
Reiley Daniel J.
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