Abstract
Differential equations for a constant-angular-magnification aspheric-mirror surface shape are derived for a general dependence of the camera image height on the camera field angle. The explicit equations of the constant-angular-magnification mirror surface are given for some particular values of the angular magnification. For a series of odd integer values of the angular magnification, 10th-order polynomial approximations of the mirror surface are presented. The imaging performance of such a mirror with an angular magnification of 7 is analyzed and compared with a spherical mirror. The main cause of image blur in all-sky cameras at the edge of the field of view was found to be a strong image curvature. We show that increasing the camera-to-mirror distance and/or stopping down the camera lens reduces the image blur.
© 1994 Optical Society of America
Full Article | PDF ArticleMore Like This
Željko Andreić and Nikola Radić
Appl. Opt. 35(1) 149-153 (1996)
Nikola Radić and Željko Andreić
Appl. Opt. 31(28) 5915-5917 (1992)
Margaret A. Malloy and Christopher M. Clayton
Appl. Opt. 27(21) 4407-4413 (1988)