By using a number of aspheric surfaces in a novel afocal arrangement a new binocular system has been designed which avoids the use of erecting prisms and provides a very wide horizontal field of view. The method uses spherical reflecting surfaces to re-fold the light path so that the field curvature is substantially corrected. This allows larger than normal eyepiece lenses giving a greater eye-relief in spite of the wide field of view.
© 1994 Optical Society of AmericaPDF Article
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