查询词典 refraction angle

Objective To evaluate the lasting time of background luminance difference of the fixation target between two eyes because of dark adaptation under routine subjective refraction.

目的 探讨在常规主觉验光环境下，暗适应造成的双眼前视标背景亮度差异的持续时间。

An optical system with refraction and total internal reflection was proposed according to the luminous characteristic of LED and the law of energy conservation. The ordinary differential equations satisfying the spots on the contour curve of TIR refractive and reflective planes were established. The coordinates of points on profile curves were obtained by solving these ordinary differential equations using Runge-Kutta method. The profile curves were acquired by curve fitting of the coordinate spots with software UG, and then TIR model of the projector and data of the surface shape suitable for NC manufacture were obtained.

根据LED的发光特性以及能量守恒定律选择采用折射全反射光学系统，通过建立TIR折射面及全反射面轮廓曲线上的点所满足的常微分方程，利用RungeKutta求解常微分方程得到轮廓曲线上点的坐标，再在UG中对坐标点进行曲线拟合得到轮廓曲线，进而得到TIR模型及适合数控加工的面形数据。

Dioptometer:an instrument used for measuring ocular refraction .

屈光计：用于测量眼睛折射度的仪器。

AIM: To compare the dioptre results obtained by wavefront analyzer and subjective refraction test, respectively, and to evaluate the accuracy and reliability of lowerorder aberrations measured by wavefront analyzer.

目的：比较波前像差仪与主观验光法对屈光度检查的结果，探讨波前像差仪对低阶像差测量的可靠性和准确性。

The distributed source results from too many multipaths that are induced by reflection, scattering, diffraction and refraction from objects in complex environment and couldn't be described discriminatingly. Thus the source arrives at array antennas in a continual angular extension.

分布源的存在，主要是因为复杂环境下的目标反射、散射、衍射和折射导致大量信号路径存在，而又不可能对每条多径给予描述，从而造成目标空间位置在一定角度范围内连续分布，引起信号到达阵列天线的波前相干损失。

The transmittance and dispersion relations of one-dimensional photonic crystals containing negative refraction materials were calculated.

利用这一特征可以制造高品质的宽带全方位反射镜，有望在半导体量子阱激光器、共振腔光发射二极管等光电子器中的谐振腔中发挥重要作用。

Over water the diurnal change in refraction is likely to be small.

在水面上，折光的周日变化可能是很小的。

The laser does not need any thermal len and thermal double refraction compensation element, having high output power, better beam quality, high doubling efficiency, better stability, widely applied in medical, industry.

该激光器不需要任何热透镜和热致双折射补偿元件，具有输出功率高、光束质量好、倍频效率高、稳定性好，医疗、工业应用性强等优点。

The working principle of double refraction instrument adopting photoelectricity aim is introduced.

介绍了采用光电瞄准的双折射仪的工作原理。

Having one direction along which double refraction of light does not take place.

单轴晶体的有一个方向的，沿此方向不发生光的双折射。

The teacher likes the honeymouthed little girl very much.

老师很喜欢这个嘴甜的小姑娘。

Mr. Notker Bien's interests are traveling, spending quality time with the family and long-distance-running.

诺特卡·柏恩先生热爱旅游，长跑，以及和家人一起共度美好时光。