英语词汇“exit pupil”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	exit pupil
释义	exit pupil exit pupil n (Astronomy) the smallest cross section of the beam of light from the eyepiece of a telescope through which all the light from the eyepiece passes. Its diameter is equal to the ratio of the focal length of the eyepiece to the focal ratio of the telescope exit pupil exit pupil (Ramsden disk; Ramsden circle) The image of the objective or primary mirror of a telescope formed on the eye side of the eyepiece. It is seen as a bright disk when the telescope is pointed at any extended bright surface. A convenient way to determine the magnification is to divide the telescope aperture by the diameter of the exit pupil. exit pupil [′eg·zət ‚pyü·pəl] (optics) The image of the aperture stop of an optical system formed in the image space by rays emanating from a point on the optical axis in the object space.
随便看	practised on practised scales practised what preach practise makes perfect practise on practiser practisers practises practise scales practises on practises scales practises what preach practise what preach practise what you preach practising practising certificate practising law institute practising on practising scales practising what preach practisour practitioner practitioner certificate in data protection practitioner data bank branch practitioner dissemination and research network

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