光電導(dǎo)攝象管脈沖曝光訊號(hào)
SIGNAL CURRENT OF PHOTOCONDUCTIVE T. V. PICK-UP TUBE UNDER PULSED EXPOSURE
-
摘要: 電視攝象管用于脈沖曝光時(shí),會(huì)顯出靈敏度下降和圖象質(zhì)量變壞。為了克服這些缺點(diǎn),可以用在陰極上加適當(dāng)?shù)钠珘好}沖,并延遲讀出的方法?？紤]到隔行掃描的電子束在靶面上部分地相互重疊所造成的靶面的復(fù)雜情況,可把靶面上的掃描光柵分為兩部分,然后分別分析這兩部分脈沖曝光后的訊號(hào)電流。 導(dǎo)出的公式可以計(jì)算訊號(hào)電流特性,這些公式在設(shè)計(jì)攝象機(jī)中的r校正器時(shí)是有用的。 為了表明陰極偏壓的作用,計(jì)算了某些情況下的訊號(hào)電流特性。對(duì)于實(shí)際應(yīng)用,加適當(dāng)?shù)年帢O偏壓是有實(shí)際意義的。最后,本文指出什么樣的攝象管適用于脈沖攝象。
-
關(guān)鍵詞:
Abstract: When T. V. pick-up tube is used under pulsed exposure, one will find the sensitivity of the tube descreases slightly and the quality of the picture degrades. These disadvantages can bo overcome by the use of delay readout and pulsing the cathode with suitable bias potentials.Eegarding to the complexity of the target surface due to partial overlapping of the electron scanning lines, we divide the scanning raster on the target into two parts, then analyse the signal current of these parts after pulsed exposure respectively. The obtained formulas can be used for calculating the signal current characteristics, some special case have been calculated, which give the useful informations for selecting the cathode bias potentials. Finally the paper shows how to select a T.V.pick-np tube for pulsed exposure application. -
吉田興夫，遲延走查にぉけるビジコンの勤作解析,テレビジョン電子裝置研資ED-301.[2]恒岡卓二,テレビジョン學(xué)會(huì)誌,32(1978), 139.[4]前田昭羲、后藤直宏,NHK技術(shù)研究,12(1963), 830.[6]恒岡卓二、舟橋行平,1971(第七回)テレビジョン全大予稿集3-12.[8]恒岡卓二,東芝レビュー, 11 (1972), 1045. -
計(jì)量
- 文章訪問數(shù): 1812
- HTML全文瀏覽量: 126
- PDF下載量: 335
- 被引次數(shù): 0
下載:
