Journal article
FOCUSING PROPERTIES OF A LINEAR-PHASE BRAGG-FRESNEL LENS
VV ARISTOV, YA BASOV, TE GOUREEV, AA SNIGIREV, T ISHIKAWA, K IZUMI, S KIKUTA
JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS | JAPAN J APPLIED PHYSICS | Published : 1992
DOI: 10.1143/JJAP.31.2616
Abstract
Hard X-ray focusing by a linear phase Bragg-Fresnel crystal lens was performed with an efficiency close to 30%. The phase shift of an incident beam was controlled by deviating the crystal lens from the exact Bragg condition. Analytical expressions for the intensity and the image contrast at the focal point was presented.