1979-10-09
1982-05-25
Corbin, John K.
G02B 1700
Patent
active
043313906
ABSTRACT:
The systems comprise a transmissive shell and a mirror. The surfaces of the shell and the mirror are monocentric; that is, spherical and have the same center of curvature. Both the object and image planes are located in front of and spaced away from the transmissive shell.
Single optical element systems comprise a transmissive shell with the mirror and the back surface of the shell being coincidence. These elements may be used as laser beam focusers, beam divergers and collimators.
Unit relay systems for use in super accurate microcircuit printing are disclosed. Parameters are given for a monochromatic diffraction limited f/2 system in the ultraviolet.
A single element monocentric catadiotric system is disclosed, which is corrected for 3rd and 5th order spherical aberration and all field aberrations except Petzval curvature. A two-element version can cover very wide fields of view with good performance at speeds as fast as f/0.6. More complicated designs are also discussed with correction for chromatic aberration and chromatic variation of aberrations. An unobscured 30.degree..times.120.degree. strip field design and an infra-red system are also disclosed.
REFERENCES:
patent: 2571657 (1951-10-01), Bennett
patent: 2785604 (1957-03-01), Blaisse et al.
patent: 3326621 (1967-06-01), De Nygorden
patent: 3494688 (1970-02-01), Rosin et al.
patent: 3748015 (1973-07-01), Offner
patent: 3748020 (1973-07-01), Fischer et al.
Corbin John K.
Giarratana S. A.
Grimes E. T.
Murphy T. P.
Sugarman Scott J.
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