IC693PTM100
IC693PTM100IC693PTM100
紅外攝像機(jī)主通常由:感光芯片(CCD或CMOS)、DSP處理芯片、紅外LED補(bǔ)光燈板、鏡頭、攝像機(jī)外殼、線纜等主要部件組成。下面對(duì)每個(gè)部件進(jìn)行深一步的剖析:
1、感光芯片
感光芯片是一個(gè)攝像機(jī)的“眼睛”它的好壞直接決定著攝像機(jī)成像質(zhì)量,特別是紅外攝像機(jī)在夜晚光線不足的情況下,顯得尤為重要。
【公 司】: 廈門(mén)泰尼電氣有限公司
【主 營(yíng)】: AB、GE、施耐德等各類(lèi)PLC產(chǎn)品
【價(jià) 格】: 電議
【發(fā)布人】: 張亮
【電 話】: 18030028083
【所在地】: 福建 - 廈門(mén)
【座 機(jī)】: 0592-6809819
【來(lái) 源】: 供應(yīng)信息 > 電工、電氣 > PLC
【Q Q】: 2314094943
感光芯片分為CCD和CMOS兩種,兩者基本上都是采用矽感光二極體進(jìn)行光電轉(zhuǎn)換。但由于兩者構(gòu)造不同:CMOS每個(gè)像素有獨(dú)立的放大器;CCD則采用電荷傳遞方式輸出信號(hào),所有像素采用同一放大器進(jìn)行信號(hào)放大。這樣相同面積下像素點(diǎn)相同時(shí),CMOS感光面積相對(duì)低于CCD,造成CMOS低照度效果相對(duì)CCD較差,再者CMOS每個(gè)放大器放大倍數(shù)都不同,造成夜晚圖像噪點(diǎn)過(guò)大,影響夜晚圖像效果;故相同像素下采用CCD作為感光元件的紅外攝像機(jī)較用CMOS做為采集圖像清晰度、低照度都會(huì)好些。再者同樣是CCD,采用超低照度的,會(huì)比普通的CCD更好些,但價(jià)格就會(huì)高很多。值得欣慰的是,隨著工藝的不斷更新,普通CCD低照度性能越來(lái)越好,目前Sony主推的ICX639比07,08年主推的ICX409低照度性能提升了3倍。
但CMOS由于工藝較CCD簡(jiǎn)單,成本較低,隨著新技術(shù)新工藝不斷改善,CMOS的高像素、信號(hào)處理迅速等優(yōu)勢(shì)逐漸明顯,在監(jiān)控領(lǐng)域份額越來(lái)越大,必將給傳統(tǒng)的CCD安防天下帶來(lái)新的挑戰(zhàn)。
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