【正文】 ......................................................... 67 十二、信息損失問題 ...................................................................................................... 67 十三、拍攝范圍 ............................................................................................................. 67 十四、如何避免被抓拍 ................................................................................................... 68 第二十六章 紅外的原理知識(shí)介紹 ................................................................................. 69 一． 紅外輻射的發(fā)射及其規(guī)律 ...................................................................................... 69 （一） 黑體的紅外輻射規(guī)律 .......................................................................................... 69 3． 輻射的空間分部規(guī)律 朗伯余弦定律 ......................................................................... 71 （四） 物體之間的輻射傳遞的影響 ............................................................................... 74 （五） 大氣衰減的影響 ................................................................................................. 74 第二十七章 治安卡口系統(tǒng)對(duì)閃光燈的要求 ................................................................... 75 一、治安卡口系統(tǒng)閃光燈概述 ........................................................................................ 75 二、在卡口系統(tǒng)中光源的選擇應(yīng)滿足下列條件： ............................................................ 76 專業(yè)性強(qiáng)： ............................................................................................................... 76 高壽命： .................................................................................................................. 76 瞬間高光強(qiáng)度： ........................................................................................................ 77 支持長(zhǎng)時(shí)間連閃和短時(shí)間內(nèi)高頻連閃； ..................................................................... 77 發(fā)光時(shí)間可以精確調(diào)整： .......................................................................................... 77 具有數(shù)字接口： ........................................................................................................ 77 遠(yuǎn)程智能控制： ........................................................................................................ 78 功 率要留有余地： .................................................................................................... 78 第二十八章 LED 術(shù)語(yǔ) .................................................................................................. 79 綠色照明 .................................................................................................................. 79 視覺作業(yè) .................................................................................................................. 79 光通量 ...................................................................................................................... 79 發(fā)光強(qiáng)度 .................................................................................................................. 79 亮度 ......................................................................................................................... 80 照度 ......................................................................................................................... 80 維持平均照度 ........................................................................................................... 80 參考平面 .................................................................................................................. 81 作業(yè)面 ...................................................................................................................... 81 亮度對(duì)比 ................................................................................................................ 81 1識(shí)別對(duì)象 ................................................................................................................ 81 1維護(hù)系數(shù) ................................................................................................................ 81 1一般照明 ................................................................................................................ 82 1分區(qū)一般照明 ......................................................................................................... 82 1局部照明 ................................................................................................................ 82 1混合照明 ................................................................................................................ 82 1正常照明 ................................................................................................................ 82 1應(yīng)急照明 ................................................................................................................ 82 1疏散照明 ................................................................................................................ 82 安全照明 ................................................................................................................ 83 2備用照明 ................................................................................................................ 83 2值班照明 ................................................................................................................ 83 2警衛(wèi)照明 ................................................................................................................ 83 2 .障礙照明 ............................................................................................................... 83 2頻閃效應(yīng) ................................................................................................................ 83 2光強(qiáng)分布 ................................................................................................................ 83 2光源的發(fā)光效能 ...................................................................................................... 84 2燈具效率 ................................................................................................................ 84 2照度均勻度 ..................................