查询词典 angular aperture

The parameters of the system are as follows: the focal length is 100mm,relative aperture is 1/2,field of view is 6°,and the working waveband is 8—11μm.

1·引言在现代军事和空间探测中，特别是高分辨率成像和军事侦察等方面，要求许多红外系统在-50—+100℃甚至更高的温度范围内能够稳定工作[1，2]。

Design on Athermalised Middle Wavelength Infrared Optical System with Large Relative Aperture.

中波红外大相对孔径消热差光学系统的设计。

The three folds and the resolution have pioneered a wideprospective for the application of Schmidt system with a small relative aperture.

本文的研究三次折叠型式和求解方法对于小相对孔径的施密特系统的应用开辟了广阔的前景。

Meanwhile, the larger the relative aperture of the holographic concave grating on aspherical surface is.

同时，利用较大相对孔径非球面全息凹面光栅，可使平场光谱仪的结构更紧凑，从而可实现平场光谱仪的小型化。

The factors influencing the flow of regulating valve are analyzed, and the flow of regulating valve is related to the flow capacity coefficient, the relative aperture and so on.

分析了燃气系统中影响调节阀流量的因素，调节阀流量与流通能力系数、相对开度等因素有关。

In order to improve performance of uncooled thermal imager, diffractive optical elements are applied in high relative aperture IR lenses.

将衍射光学元件应用于非制冷热像仪的大相对孔径红外镜头与传统设计相比，衍射光学元件的引入，增强了此类镜头的色差校正能力，提高了镜头的成像质量，提高了镜头的透过率，减少了光学零件的数量，减轻了系统重量，为提高非制冷热像仪的性能奠定了坚实基础。

The enlargement of FOV and the relative aperture is the key measure to improve the performance of underwater photographic objective under weak illumination.

增大视场角和相对孔径是提高水下微光摄影物镜性能的重要手段。

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。

Meanwhile, the larger the relative aperture of the holographic concave grating on aspherical surface is, the more compact the flat-field spectrograph will be.

同时，利用较大相对孔径非球面全息凹面光栅，可使平场光谱仪的结构更紧凑，从而可实现平场光谱仪的小型化。

SABT can gain the time series of optical aberrations on the relative large aperture, advances the temporal and spatial information of optical wavefront aberration.

SABT能得到较大孔径上的光学畸变的时间序列，给出光波前畸变的时间及空间信息。

Go to your desktop and right click in a blank space.

请到您的桌面，然后右击一个空白。

Tara appears in Buddhism, Jainism, and particularly, Tibetan Lamaism, as a complex array of manifestations: goddess of ascetism and mysticism, mother creator, protectress of all humans as they cross the sea of life.

度母出现在佛教，耆那教里面，尤其是西藏的喇嘛教，作为一系列的陈列阵容；神秘的女神，创世之母，人类横过生命之海洋的女性保护者。