查询词典 aperture of lens

F f-Number: A symbol that expresses the relative aperture of a lens.

f-制光圈∶一个表示镜头的相对光圈的单位。

Solid immersion lens was employed to increase the optical writing density. The position of foci and numerical aperture of the focusing system with SIL were simulated, and the threedimensional optical data storage was conducted.

为进一步提高光存储密度，利用固体侵没透镜与数值孔径为0.55的长工作距离物镜对飞秒激光脉冲进行聚焦，完成了PMMA及石英介质上的存储实验，并对聚焦物镜焦点与SIL底面离焦时的介质内焦点位置和系统的数值孔径进行了模拟。

When the measuring system of point scanning confocal microscope is designed,the parameter of object lens is important because the measuring precision of the system are determined by the numerical aperture of lens.

在设计点扫描激光共焦显微镜测量系统时，物镜参数的选择是至关重要的，因为它的数值孔径大小直接影响着系统的测量精度。

Its R/W device has a single laser source and a single object lens. The wavelength of laser source and the numerical aperture of object lens are between those of CD and DVD or same as those of CD.

此种光学记录媒体的读写装置具有单一激光光源以及单一物镜，激光光源的波长和物镜的数值孔径介于CD与DVD规格之间，或与CD规格相同。

Optical system design for lens with relative aperture of 1∶1［J］.

相对孔径为1：1镜头的光学系统设计［J］。

A spectral camera lens with the relative aperture of 1∶1 is introduced.

介绍一种相对孔径为1：1的光谱摄像镜头。

The relative aperture of the zoom lens is F/1.6 in this design.

用实例说明水下镜头的设计方法，设计的镜头相对孔径为F/1.6。

According to third-order aberration theory, the conditions of the absence of aberrations were analyzed, and the influences to the remaining high order aberrations of the system caused by the change of the relative aperture of the primary mirror, the position of the corrector and the different combination of the positive and negative lens in the corrector were investigated.

根据像差理论分析了消像差的条件，研究了主镜的相对孔径变化、校正板在次镜后的位置变化以及无光焦度校正板的正负透镜的不同组合形式对系统高级残余像差的影响。

With a maximum aperture of f/2.5, and by applying classical and proven spherical lens designs, these lenses provide excellent quality.

凭借f/2.5镜头最大光圈，并运用传统和证明球面镜片的设计，这些镜头提供优良的品质。

of designing an achromatic lens with F/#=1 and aperture D=5mm is developed and numerical simulation is performed.

利用这种特性，本文提出了一种变深度亚波长孔阵金属折衍混合透镜（DV- SHAM R/D lens），它是由DV- SHAM lens与折射透镜结合，能够消色差，实现宽波段成像。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。