Open AccessANALYSIS TO EFFECT OF MAIN FACTORS ON RESOLUTION INVOLVED IN X-RAY HOLO-GRAM RECORDING
Author(s) -
Ping Zhu,
Tiqiao Xiao,
Jianwen Chen,
Zhizhan Xu
Publication year - 1994
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.43.879
Subject(s) - holography , optics , resolution (logic) , fourier transform , physics , radius , aperture (computer memory) , image resolution , condenser (optics) , focus (optics) , x ray , filter (signal processing) , spatial frequency , computer science , artificial intelligence , light source , computer security , quantum mechanics , acoustics , computer vision
Some main factors having influence on the resolution of X-ray holograms are analyzed theoretically. The smalles resolving distance of X-ray lensless Fourier transform holograms can not be less than the radius of the focus spot of the X-ray condenser or the filter aperture used in recording, and the resolution of X-ray in-line holograms can not be higher than the cutoff frequency of recording material, under the condition that X-ray is perfectly coherent. Relationships between the coherent length required by X-ray lensless Fourier transform holography and the resolution, and the radius of the object are quadric; and the coherent length requested by X-ray in-line holography is proportional to the square of the resolution and does not change with the size of object, under the condition that X-ray is partially coherent. With the resolution of X-ray holograms raised, the reguired coherent length will be increased by a large amount.