Astigmatic collimator

Details Astigmatic collimator Astigmatic collimator

1985-03-29

1987-06-02

Howell, Janice A.

Radiant energy

Radiation controlling means

250363S, G01T 1166

Patent

active

046706577

ABSTRACT:
A collimator collimates radiation so that each beam passes through two focal lines. One of the lines is in a transaxial plane and the other line is in an axial plane. The focal length in the transaxial plane is longer than is the focal length in the axial plane. In the preferred embodiment, the focal lines are perpendicular, whereby an anamorphic collimator is produced. Alternatively, the focal lines are nonparallel, producing an astigmatic collimator.

REFERENCES:
patent: 4081687 (1978-03-01), York et al.
patent: 4181839 (1980-01-01), Hatton et al.
patent: 4250392 (1981-02-01), Leask et al.
patent: 4584478 (1986-04-01), Genna et al.

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