【科普知识】镜头焦距与距离啥关系?
<section style="box-sizing: border-box; background-color: rgb(255, 255, 255);"><section class="Powered-by-XIUMI V5" style=" box-sizing: border-box; " powered-by="xiumi.us"><section class="" style=" box-sizing: border-box; "><section class="" style="box-sizing: border-box;"><section style="box-sizing: border-box;">1、摄像头镜头能看多远？</section><section style="box-sizing: border-box;"><br style="box-sizing: border-box;"></section><section style="box-sizing: border-box;">监控距离与焦距的关系</section></section></section></section><section class="Powered-by-XIUMI V5" style=" box-sizing: border-box; " powered-by="xiumi.us"><section class="" style=" text-align: center; margin-top: 10px; margin-bottom: 10px;box-sizing: border-box; "></section></section><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style=" box-sizing: border-box; "><section class="" style="box-sizing: border-box;"><section style="box-sizing: border-box;">举例：<br style="box-sizing: border-box;"></section></section></section></section><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style=" box-sizing: border-box; "><section class="" style="box-sizing: border-box;"><section style="box-sizing: border-box;">如图12mm镜头，在10m处看人物更合适。</section></section></section></section><section class="Powered-by-XIUMI V5" style=" box-sizing: border-box; " powered-by="xiumi.us"><section class="" style=" text-align: center; margin-top: 10px; margin-bottom: 10px;box-sizing: border-box; "></section></section><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style=" box-sizing: border-box; "><section class="" style="box-sizing: border-box;"><section style="box-sizing: border-box;"><br style="box-sizing: border-box;"></section></section></section></section><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style=" box-sizing: border-box; "><section class="" style="box-sizing: border-box;"><section style="box-sizing: border-box;">2、摄像头镜头能看多宽？</section><section style="box-sizing: border-box;">每种镜头都会有相应的视场角，根据视场角α及摄像机与物体间的距离D或者所要看的物体宽度V，可以测算出安装距离或所视范围。</section><section style="box-sizing: border-box;">假设视场角α是90度，摄像机安装位置距大门6米，则所能看到的范围V大概有多宽？</section><section style="box-sizing: border-box;"><br style="box-sizing: border-box;"></section></section></section></section><section class="Powered-by-XIUMI V5" style=" box-sizing: border-box; " powered-by="xiumi.us"><section class="" style=" text-align: center; margin-top: 10px; margin-bottom: 10px;box-sizing: border-box; "></section></section><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style=" box-sizing: border-box; "><section class="" style="box-sizing: border-box;"><section style="box-sizing: border-box;">Tan(α/2)=0.5×V÷D</section></section></section></section><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style=" box-sizing: border-box; "><section class="" style="box-sizing: border-box;"><section style="box-sizing: border-box;"><br style="box-sizing: border-box;"></section></section></section></section><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style=" box-sizing: border-box; "><section class="" style="box-sizing: border-box;"><section style="box-sizing: border-box;">3、摄像头镜头能看多大角度？</section></section></section></section><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style=" box-sizing: border-box; "><section class="" style="box-sizing: border-box;"><section style="box-sizing: border-box;">常规视场角在官网型号详细参数里面可以查到。</section><section style="box-sizing: border-box;">如DS-2CD3325D-I</section><section style="box-sizing: border-box;"><br style="box-sizing: border-box;"></section></section></section></section><section class="Powered-by-XIUMI V5" style=" box-sizing: border-box; " powered-by="xiumi.us"><section class="" style=" text-align: center; margin-top: 10px; margin-bottom: 10px;box-sizing: border-box; "></section></section><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style=" box-sizing: border-box; "><section class="" style="box-sizing: border-box;"><section style="box-sizing: border-box;">常规1/3" CCD 视角可以参考以下表<br style="box-sizing: border-box;"></section></section></section></section><section class="Powered-by-XIUMI V5" style=" box-sizing: border-box; " powered-by="xiumi.us"><section class="" style=" text-align: center; margin-top: 10px; margin-bottom: 10px;box-sizing: border-box; "></section></section><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style=" box-sizing: border-box; "><section class="" style="box-sizing: border-box;"><section style="box-sizing: border-box;"><br style="box-sizing: border-box;"></section></section></section></section><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style=" box-sizing: border-box; "><section class="" style="box-sizing: border-box;"><section style="box-sizing: border-box;"><br style="box-sizing: border-box;"></section></section></section></section><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style=" box-sizing: border-box; "><section class="" style="box-sizing: border-box;"><section style="box-sizing: border-box;">摄像头镜头焦距小，画面拍的物体直线边缘会产生弧度。属于正常光学畸变。</section><section style="box-sizing: border-box;"><br style="box-sizing: border-box;"></section></section></section></section><section class="Powered-by-XIUMI V5" style=" box-sizing: border-box; " powered-by="xiumi.us"><p style=" text-align: center; margin-top: 10px; margin-bottom: 10px;box-sizing: border-box; "></p><p style=" text-align: center; margin-top: 10px; margin-bottom: 10px;box-sizing: border-box; "><br></p><section class="" style="line-height: 25.6px; white-space: normal; display: inline-block; vertical-align: top; width: 66.7188px; box-sizing: border-box; background-color: rgb(255, 255, 255);"><section class="Powered-by-XIUMI V5" powered-by="xiumi.us" style="box-sizing: border-box;"><section class="" style=" margin-top: 0.5em; margin-bottom: 0.5em;box-sizing: border-box; "></section></section></section><section class="" style="padding: 5px; line-height: 25.6px; white-space: normal; display: inline-block; vertical-align: top; width: 489.266px; box-sizing: border-box; background-color: rgb(255, 255, 255);"><section class="Powered-by-XIUMI V5" powered-by="xiumi.us" style="box-sizing: border-box;"><section class="" style=" box-sizing: border-box; "><section class="" style="box-sizing: border-box;"><section style="box-sizing: border-box;">手机扫一扫下图二维码，安装经销APP</section><section style="box-sizing: border-box;"><br></section><section style="box-sizing: border-box;"></section></section></section></section></section><p><br></p></section><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style=" box-sizing: border-box; "><section class="" style="box-sizing: border-box;"><section style="box-sizing: border-box;"><br style="box-sizing: border-box;"></section></section></section></section></section><p><br></p>
页:
[1]