The negative first lens group (I) and positive second lens group (II) are movable for altering focal length. The negative first lens group, viewed from the object side, possesses a first lens element (I-1) in the form of a single positive lens element; a second lens element (I-2) ...
Based on correlated imaging with pseudo-thermal light, Wu and Meyers independently experimentally showed that both positive and negative images can be obtained by using a novel algorithm. With the theory of statistical optics, we construct the model of thermal light, and demonstrate the novel algorit...
Studying the temporal integration of visual signals is crucial to understand how time spent on different visual tasks can affect emmetropization and refractive error development. In this study we assessed the effect of interrupting positive and negative lens-imposed defocus with brief periods of unrestr...
美 英 un.负透镜 网络发散透镜;凹透镜;发射透镜 英汉 网络释义 un. 1. 负透镜
Five eyes of 4 patients required IOL exchange with capsular bag placement of a poly(methyl methacrylate) (PMMA) or silicone lens for resolution of symptoms. Selecting alternate IOL styles reduced the incidence of dysphotopsia. Glare and streaks from a point source of light represent positive ...
The system has a first positive lens group, and a second negative lens group, arranged in sequence and observable from the object side. A central or rear part of the positive first lens group (11) is formed as a sharp adjustment lens group (11F), which is movable along the optical ...
Iftheamountofpositiveandnegativecharges isvaried,theelectronstreamcanbe made tobendup ordowninvaryingamounts. 如果正负电荷的量发生变化,电子流上下弯曲的程度也随之变化。 e.3edu.net 2. Adistinctionisoftenmade between"positive"and"negative"eugenics. ...
This technique, described as ‘Pulsed Positive Negative Ion Chemical Ionization’ (PPNICI) involved pulsing at a frequency rate of 10 kHz the polarities of a chemical ionization source and focusing lens of a QMF such that alternate packets of positive and negative ions are extracted and allowed ...
a second lens of positive optical power forming a biconvex shape, an aperture stop, a third lens of negative optical power forming a biconcave shape, a fourth lens of positive optical power, and a fifth lens of positive optical power forming a biconvex shape, which are disposed in order ...
BEIJING, July 17 (Xinhua) -- "China is a country that's worth marrying in so many ways, and it's totally unfair to see it only through a negative lens. It has so many positive aspects," French entrepreneur Arnaud Bertrand has said. ...