Results 101 to 110 of about 470 (166)
Comparison of photorefraction by Plusoptix A12 and cycloplegic autorefraction in children
BMC OphthalmologyBackground Plusoptix photoscreeners are capable of measuring refractive errors of children from 1 meter distance, without cyloplegia. We aimed to compare refractive data obtained from the newest version of Plusoptix (model 12) with cycloplegic ...
Hadi Ghadimi +2 more
doaj +1 more source
Wide-Spectrum Security of Quantum Key Distribution
PRX QuantumImplementations of quantum key distribution (QKD) need vulnerability assessment against loopholes in their optical scheme. Most of the optical attacks involve injecting or receiving extraneous light via the communication channel.
Hao Tan +7 more
doaj +1 more source
, 2001 학위논문(박사) - 한국과학기술원 : 화학공학과, 2001.2, [ x, 132 p. ]While the word "photorefraction" may literally describe all kinds of photoinduced changes of the refractive index of a material, photoinduced phase grating which shows two beam coupling via
이종우, Lee, Jong-Woo
core
QPM grating design for novel PPLN structures
, 2009 This thesis describes a series of theoretical and experimental studies into modifying the phasematching characteristics of nonlinear parametric interactions, specifically second harmonic generation, using quasi-phase-matched structures.
Major, Huw E., Major, Huw E
core
Photorefractive Materials and Their Applications. Photorefractive Polymers and Their Applications.
The Review of Laser Engineering, 2002 HIRAO, Akiko +3 more
openaire +2 more sources
, 2001 INTRODUCTION: The rationale for preschool vision screening programmes has recently been questioned. Evidence about the effects of early treatment is needed, but it is not known how early the target conditions can reliably be detected.
Williams, C +3 more
core