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type="text/css"></style> <div id="ct" class="ct2 wp cl"> <div class="mn"> <div class="bm_haa cl"> <div class="bm_h cl"> <a href="http://www.oecr.com/portal.php?mod=rss&catid=62" class="y xi2 rss" target="_blank" title="RSS">订阅</a><h1 class="xs2">文章</h1> </div></div> <div class="kjkjb"> <div class="bm vw" style="margin-bottom:0;"> <div class="h hm"> <div class="zxtoux"><img src="http://www.oecr.com/uc_server/avatar.php?uid=54876&size=small" /></div> <h1 class="ph">监控摄像机CS镜头和C镜头区别探讨 </h1> <p class="xg1"> 时间：2016-3-4 14:51<a class="zz" href="home.php?mod=space&uid=54876">作者：update</a> 阅读<em id="_viewnum">(2771)</em> 评论: <a href="http://www.oecr.com/portal.php?mod=comment&id=4141&idtype=aid" title="查看全部评论"><em id="_commentnum">6</em></a></p> <div class="zxfb" ><a href="http://www.oecr.com/portal.php?mod=rss&catid=62" class="y xi2 rss" target="_blank" title="RSS">订阅</a></div> </div> <!--[diy=diysummarytop]--><div id="diysummarytop" class="area"></div><!--[/diy]--> <div class="s"> <div class="ss"><div><span>导读： </span>CS式和C式是镜头的两种安装方法，两者的螺纹均为1英寸32牙，直径为1英寸，不同是镜头距CCD靶面的间隔差异，C式安装座从基准面到核心的间隔为17.562毫米，比CS式间隔CCD靶面多一个专用接圈的长度，CS式距核心间隔为12 ...</div> </div> <!--[diy=diysummarybottom]--><div id="diysummarybottom" class="area"></div><!--[/diy]--> <div class="d"> <!--[diy=diycontenttop]--><div id="diycontenttop" class="area"></div><!--[/diy]--> <table cellpadding="0" cellspacing="0" class="vwtb"><tr><td id="article_content"><div><br></div><div>监控摄像机镜头的选择关乎到一个监控摄像机的性能，监控摄像机标准枪机的镜头可以分为C口与CS口，但是到目前为止，很多用户还是弄不清楚这两种接口的监控镜头区别在哪里。</div><div><br></div><div>C口镜头（C-Mount），后口为25mm直径的螺丝口接口，像面尺寸(Format)：2/3/1/2英寸，高清<a href="http://opticalfilm.oecr.com" target="_blank" class="relatedlink">镀膜</a>，玻璃镜片，金属外壳，光圈无档位变换，能够光圈全开与全关。一般指的是C型接口的电影机，摄像机镜头。镜头与摄像机接触面至镜头焦平面（摄像机CCD光电感应器应处的位置）的距离为17.5mm，也就是我们专业术语中说的法兰焦距。</div><div><br></div><div>C口镜头一般分为手动镜头和自动镜头：手动镜头是聚焦，变焦，光圈大小都是<a href="http://machine.oecr.com" target="_blank" class="relatedlink">机械</a>手动控制的；自动镜头是前三者都能自己控制。它在广义上包括了TV镜头、摄像机的镜头、电影机的镜头、监控枪机镜头、摄像头等。</div><div style="text-align: center;"><p><a href="data/attachment/portal/201603/04/142525zowc55uw37yyo773.jpg" target="_blank"><img src="data/attachment/portal/201603/04/142525zowc55uw37yyo773.jpg"></a></p></div><div><br></div><div>C接口镜头（C-Mount）与CS(CS-Mount)接口镜头最明显的区别就是镜头与摄像机接触至摄像机感光元器件（CCD/COMS<a href="http://sensor.oecr.com" target="_blank" class="relatedlink">传感</a>器）的位置（焦平面）的距离不同。</div><div><b><br></b></div><div><b><br></b></div><div style="text-align: center;"><img src="http://www.oecr.com/data/attachment/portal/201603/04/142525f7tiky56utrcwtto.jpg"></div><div style="text-align: center;"><br></div><div style="text-align: center;"><div> CS-mount：图像传感器到镜头之间的距离应为12.5mm</div><div> C-mount：图像传感器到镜头之间的距离应为17.5mm</div><div><br></div></div><div>在镜头的使用过程中，通常是C型标准摄像机接C接口镜头，CS镜头接CS型摄像机。但是在使用的过程中先看一看摄像头和镜头是不是统一种接口方法，如果不是，就必要按照详细环境增减接圈。</div><div><br></div><div>C接口镜头可以加装一个5mm厚的延长环与CS型摄像机搭配使用，别小瞧这一个接圈，假如没有它，镜头与摄像头就不能正常聚焦，图像变得模糊不清，C接口镜头不加延长圈则会导致镜头碰到传感器靶面，造成传感器损坏。而CS型镜头与C型摄像机无法配合使用，原因是镜头成像面与CCD受光面距离太远，不能得到聚焦的图像。</div><div><span style="line-height: 1.8em;"><br></span></div><div><span style="line-height: 1.8em;">一个5mm的垫圈(C/CS连接环)可用于将C-mount镜头转换为CS-mount镜头，C-mount是最初的标准，而CS-mount是对其的升级，该升级可降低制造成本并减小传感器尺寸。</span></div><div><span style="line-height: 1.8em;"><br></span></div><div><span style="line-height: 1.8em;">现在市场上销售的绝大多数摄像机和镜头都使用CS-mount标准。可以通过使用C/CS连接环将一个老的C-mount镜头安装到带有CS-mount接口的摄像机上。如果摄像机无法聚焦，则可能是因为使用了错误的镜头类型。</span></div><div style="text-align: center;"><p><a href="data/attachment/portal/201603/04/142525g1n62ccwx11snrxc.jpg" target="_blank"><img src="data/attachment/portal/201603/04/142525g1n62ccwx11snrxc.jpg"></a></p></div><div>镜头的像面尺寸（Format）在选购镜头的时候也需要注意，比如镜头的像面尺寸是1/3英寸，而传感器受光靶面为1/2英寸，这就会导致图像出现暗角。而我们选择镜头的像面尺寸应该大于等于传感器受光靶面。镜头调节环上面通常还应该有一些标识：通常W（wideangle）代表近焦，T（telephoto）代表远焦。F（far）、N(near)表示聚焦，O(open)、C（Close）光圈开关。除此以外，在选择镜头的过程中还应该注意镜头本身焦距可变范围，以及光圈值的大小，这些会影响监控范围内的物体的成像效果。</div><div style="text-align: center;"><p><a href="data/attachment/portal/201603/04/143505mk51esne1zyv90vw.jpg" target="_blank"><img src="data/attachment/portal/201603/04/143505mk51esne1zyv90vw.jpg"></a></p><p class="MsoNormal" style="text-align: center;"><span style="mso-spacerun:'yes';font-family:宋体;font-size:10.5000pt;mso-font-kerning:0.0000pt;">欢迎关注光电<a href="http://news.oecr.com" target="_blank" class="relatedlink">资讯</a>微信公众号，每天将由光电工程师<a href="http://club.oecr.com" target="_blank" class="relatedlink">社区</a>网站(oecr.com)编辑团队为您精选行业动态，科技资讯，技术解析，光电<a href="http://www.oecr.com/portal.php?mod=list&catid=62" target="_blank" class="relatedlink">科普</a>等精彩内容。 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