天文望遠鏡影像增強之探討  none

Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/6621

Title:	天文望遠鏡影像增強之探討 none
Authors:	蔡德昭;De-Zhou Cai
Contributors:	光電科學研究所
Date:	2001-07-03
Issue Date:	2009-09-22 10:24:11 (UTC+8)
Publisher:	國立中央大學圖書館
Abstract:	在微弱的光線下人類無法得到正常的視覺，解決此問題的方法有三：(1)利用人工光源增加物體的亮度；(2)收集更多的光線進入眼睛；(3)利用儀器增加光電轉換的量子效率，以及增加電光轉換過程中光線的衰減時間。在某些情況下，待測物體的亮度是固定不變的，因此我們只能運用儀器來進行觀測工作。影像增強管是本系統的重點，它是使用感光元件，(1) 藉著其寬頻效應，來收集更多的光線；(2)利用光電效應，將光轉換成電子，然後倍增電子數，同時提高電子的動能，來達成影像的增強。本文乃是結合天文望遠鏡與第二代影像增強管，使目標景物之輸出影像的強度增加，再利用CCD 攝影機將此增強影像傳送到監視器，或者是進行後續的影像處理。 Under dim light, human being can not have normal vision. To solve the problem, there are three methods to be studied: (1) Increase subject’s brightness with artificial light source. (2) Collect more light into our eyes. (3)Use instrument to increase the quantum efficiency of opto-electronic transformation and the attenuation time of light of electro-optical transformation. In some situations, we can not enlarge subject’s brightness, so we can only use instrument to proceed our observation. Image intensifier tube is the key part. It uses light-sensitivity element and (1) collects more light by its broad frequency effect. (2) utilizes photoelectric effect to transform light into electrons, then increases the numbers and the kinetic energy of the electron to reach the enhancement of the image. In this thesis, we combine telescope and image intensifier tube of generationⅡto increase the brightness of the image of the subject, and then use CCD camera to transport this image to monitor.
Appears in Collections:	[Graduate Institute of Optics and Photonics] Electronic Thesis & Dissertation

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