X-ray or gamma ray systems or devices – Beam control – Collimator
Patent
1988-05-03
1990-03-20
Fields, Carolyn E.
X-ray or gamma ray systems or devices
Beam control
Collimator
378149, 378161, G21K 102
Patent
active
049107593
ABSTRACT:
A lens and collimator apparatus for focusing and increasing the intensity of an x-ray beam at a specimen point. A screen with an aperture of pupil diameter comparable and no larger than the x-ray transverse coherence length and no smaller that the specimen diameter focuses the x-ray beam by diffraction. The screen is positioned from the specimen plane proportional to the ratio of the square of the pupil diameter to the mean wavelength of the x-ray beam. A plurality of parallel screens can also be used.
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Fields Carolyn E.
Porta David P.
University of Delaware
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