英语释义

1. a measure of the angle of the cone of light rays from an object that traverse an optical system specifically the effective aperture of a camera lens expressed as a fraction of its focal length with the symbol f being used instead of 1 as the numerator or expressed as the ratio of the effective aperture to the focal length
a lens having an effective aperture that is 1/45 of its focal length has a relative aperture of f/4.5 or 1:4.5

片语

horizontal accelerator relative aperture水平加速器相对径孔

vertical accelerator relative aperture加速乒直相对孔径

accelerator relative aperture加速器相对孔径

super relative aperture超大相对孔径

Maximum Relative Aperture最大相对孔径

effective relative aperture[摄]

relative e aperture相对孔径

generalized relative aperture广义相对孔径

英汉例句

• research results show that the relative aperture of optical lens, the incline and defocusing of reflection plane in tv seeker optical system reduce the intensity of the 「cat's eye」 reflection.

  研究结果表明：回波强度受导引头光路中光学镜头的相对孔径、摄像管靶面倾斜和离焦的影响较大； 扫描激光光束的入射角等因素对回波强度也有一定的影响。

• bandwidth of amplifier and relative aperture of optical system are optimized based on the requirement of temperature resolution.

  基于系统温度分辨力的要求，对光学系统的相对孔径及选频放大器的带宽进行了优化设计。

• objective lens of beam expander with a high-order curved surface can correct aberration for a deep relative aperture lens.

  本文对照相物镜相对孔径的定义、光圈数、像面照度、像面曝光量以及它们之间的关系进行了讨论。

• research results show that the relative aperture of optical lens, the incline and defocusing of reflection plane in tv seeker optical system reduce the intensity of the 「cats eye」 reflection.

  以电视导引头光学系统为例，运用矩阵光学追迹法对影响「猫眼效应」回波强度的因素进行了定性和定量的分析。

• 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。

• 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。

• in the meantime, we analyse the main factors that is focus, relative aperture and image illuminance affect lens image quality and their relations.

  同时，着眼于成像系统的分辨率，我们分析了包括焦距、相对孔径、像面照度等影响镜头成像质量的主要因素及其相互之间的关系；

• it is a key step of manufacturing the large relative aperture aspherical surface to make a breakthrough at the technology.

  突破这一技术是研制大相对孔径非球面的关键环节。