Title:
OPTICAL SYSTEM FOR TRANSMITTING IMAGE OUT OF AXIS
Document Type and Number:
Japanese Patent JPS5517197
Kind Code:
A
Abstract:
A catoptric system for forming in accurate micro detail an image of an object at unit magnification with high resolution is provided by convex and concave spherical mirrors arranged with their centers of curvature coinciding at a single point. The mirrors are arranged to produce at least three reflections within the system and they are used in the system with their axial conjugates at said point and to provide two off axis conjugate areas at unit magnification in a plane which contains the center of curvature, the axis of the system being an axis normal to the latter plane and through said point. This combination is free from spherical aberration, coma and distortion and, when the algebraic sum of the powers of the mirror reflecting surfaces utilized is zero, the image produced is free from third order astigmatism and field curvature.
Inventors:
ABE OTSUFUNAA
Application Number:
JP7762179A
Publication Date:
February 06, 1980
Filing Date:
June 21, 1979
Export Citation:
Assignee:
PERKIN ELMER CORP
International Classes:
G02B17/00; G02B17/06; G02B27/18; G03F7/20; (IPC1-7): G02B17/06
Foreign References:
| US3190171A | 1965-06-22 | |||
| US3536380A | 1970-10-27 |