IC693PWR331
IC693PWR331IC693PWR331
鏡頭
紅外攝像機(jī)選擇鏡頭,首先,必須選用帶IR功能的紅外鏡頭,如果采用普通不感紅外鏡頭,會(huì)由于白天可見光和夜晚補(bǔ)的紅外光波段不同,造成鏡頭成像焦點(diǎn)偏移,圖像白天清晰夜晚模糊的現(xiàn)象;再者在焦距一定的情況下,盡量選用光圈F小的鏡頭,光圈越小,進(jìn)光量越大。例如同一個(gè)CCD系統(tǒng)在相同的補(bǔ)光情況下,F(xiàn)2.0光圈鏡頭會(huì)比F1.0光圈鏡頭進(jìn)光量減少4倍。最后,能用定焦鏡頭的不要用變焦鏡頭,定焦鏡頭的光圈F值一般也是固定的,盡量選用F值小的鏡頭即可,但變焦鏡頭即使在小焦距段光圈為F1.0此時(shí)夜晚補(bǔ)光效果很好,到如果調(diào)節(jié)到大焦距段時(shí),鏡頭的光圈F值會(huì)隨著焦距變大而變大,造成進(jìn)光量減少,紅外效果下降,攝像機(jī)抓取圖片偏暗。
【公 司】: 廈門泰尼電氣有限公司
【主 營】: AB、GE、施耐德等各類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
【座 機(jī)】: 0592-6809819
【來 源】: 供應(yīng)信息 > 電工、電氣 > PLC
【Q Q】: 2314094943
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