Infra-red optical systems

Details Infra-red optical systems Infra-red optical systems

1985-07-30

1989-01-31

Arnold, Bruce Y.

350447, G02B 1314

Patent

active

048011835

ABSTRACT:
An infra-red optical system, such as an afocal telescope, having a beam-splitter plate located in a beam position having one valve of numerical aperture and tilted with respect to the optical axis has a single compensating plate located in a beam position having a different value of numerical aperture and tilted differently with respect to the optical axis so as to compensate for aberrations introduced by the tilted beam-splitter plate. The beam-splitter and compensating plates are preferably tilted about respective first and second axes orthogonal to the optical axis and lying on mutually orthogonal planes.

REFERENCES:
patent: 2896499 (1959-07-01), DeLang
patent: 4541688 (1985-09-01), Watt et al.
patent: 4621888 (1986-11-01), Crossland et al.
Jenkins, F. A. et al, Fundamental of Optics, Third Ed. McGraw-Hill, N.Y., 1957, p. 20.
Smith, W. J., Modern Optical Engineering, McGraw-Hill, N.Y., pp. 82-84.

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