查询词典 relative aperture

An underwater optical system of big field and relative aperture is designed according to the characters of underwater low light level imaging.

针对系统的微光成像特点，设计了大视场、大相对孔径的光学系统，增加了进入成像器件的光能量，提高了成像质量。

The objective has high infrared transmission, large relative aperture and high resolution.

该物镜红外透过率高、相对孔径大、分辨率较高。

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。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。