TY - JOUR
T1 - Analyses of pseudo-nondiffracting beams at oblique incidence
AU - Sze, Jyh Rou
AU - Wei, An Chi
AU - Chen, Fong Zhi
PY - 2010/10
Y1 - 2010/10
N2 - We design three types of diffractive optical elements (DOEs) which generate pseudo-nondiffracting beams (PNDBs) in different regions by using the conjugate gradient method. In order to analyze the influence of the tilt angles of the DOEs, the coordinate-transformation method is used to simplify the calculation. The uniformity of the out-coupling illuminance along the optical axis is calculated. The analyzed results show that when the tilt angle increases, the uniformity in the region [140 mm, 200 mm] has more violent fluctuations than those in the regions [280 mm, 340 mm] and [380 mm, 520 mm]. The analyses also reveal that the uniformity of DOEs with a longer focal length is less sensitive to the tilt angle, and some points within the PNDB region have small variations of axial illuminance while the tilt angle increases.
AB - We design three types of diffractive optical elements (DOEs) which generate pseudo-nondiffracting beams (PNDBs) in different regions by using the conjugate gradient method. In order to analyze the influence of the tilt angles of the DOEs, the coordinate-transformation method is used to simplify the calculation. The uniformity of the out-coupling illuminance along the optical axis is calculated. The analyzed results show that when the tilt angle increases, the uniformity in the region [140 mm, 200 mm] has more violent fluctuations than those in the regions [280 mm, 340 mm] and [380 mm, 520 mm]. The analyses also reveal that the uniformity of DOEs with a longer focal length is less sensitive to the tilt angle, and some points within the PNDB region have small variations of axial illuminance while the tilt angle increases.
UR - http://www.scopus.com/inward/record.url?scp=78049342187&partnerID=8YFLogxK
U2 - 10.1007/s00339-010-5776-z
DO - 10.1007/s00339-010-5776-z
M3 - 期刊論文
AN - SCOPUS:78049342187
SN - 0947-8396
VL - 101
SP - 173
EP - 178
JO - Applied Physics A: Materials Science and Processing
JF - Applied Physics A: Materials Science and Processing
IS - 1
ER -