Apparatus and method for optical relay and reimaging

Details Apparatus and method for optical relay and reimaging Apparatus and method for optical relay and reimaging

1989-08-29

1992-08-18

Arnold, Bruce Y.

Optical: systems and elements

Compound lens system

With relay

359364, 359728, G02B 2300, G02B 1700

Patent

active

051404591

ABSTRACT:
An optical reimager (20) is formed by combining a two-element optical relay (24) with a single-element imager objective (22). The relay (24) comprises a refractive element (26) that is used twice and a mirror (28) that provides a real stop. The reimager can be made diffraction-limited by configuring the mirror with an aspheric surface to correct spherical aberration introduced by both the refractive element (26) and the objective (22), and configuring the objective with an aspheric surface to correct non-spherical aberrations (principally astigmatism and coma). The reimager (20) is described in connection with a thermal imaging application requiring telecentricity and a remote entrance pupil.

REFERENCES:
patent: 3536380 (1970-10-01), Ferguson
patent: 4293186 (1981-10-01), Offner
patent: 4650315 (1987-03-01), Markle
patent: 4685777 (1987-08-01), Hirose
patent: 4834517 (1989-05-01), Cook
patent: 4867549 (1989-09-01), Sekine
patent: 4896952 (1990-01-01), Rosenbluth

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