距离选择:
监控摄像机的使用距离
10米内选取3.6-4MM的镜头,
20米内选取6MM镜头,
30米内选取8MM镜头,
40米内选取12MM镜头,
50米内选取16MM镜头,
以此照推算(镜头跟使用环境有关,一切按实际选取)
角度选择:监控摄像机选取1/3感光原件的举例说明定焦镜头监控角度:
①监控摄像机镜头2.1MM小镜头-监控角度150度;
②监控摄像机镜头2.5MM小镜头-监控角度130度;
③监控摄像机镜头2.8MM小镜头-监控角度115度;
④监控摄像机镜头3.6MM小镜头-监控角度80-96度;
⑤监控摄像机镜头4MM-监控角度78-80度;
⑥监控摄像机镜头6MM-监控角度53-60度;
⑦监控摄像机镜头8MM-监控角度40-45度;
⑧监控摄像机镜头12MM-监控角度23-30度;
⑨监控摄像机镜头16MM-监控角度15-17度;
720P对应100万像素、
960P对应130万像素、
1080P对应200万像素、1920×1080的分辨率
2m对应200万像素、
3mp对应300万像素、16:9的宽高比拍摄,拍出的照片分辨率是2560×1440(约369万像素
4mp对应400万像素、
5mp对应500万像素。4:3的宽高比拍摄,拍出的照片分辨率是2592×1944(约504万像素)
4K ,即3840×2160的像素分辨率
监控摄像机镜头焦距与实际照射距离的关系
监视器显示5m高物体为准 镜头安装部位口径为25.4mm
镜头安装基准面到焦点的距离为17.526mm
C型镜头安装到CS接口的摄像机时需增配5mm厚的接圈 *2.8即:F=2.8mm镜头,拍摄距离为1~4米,拍摄角度为115°。 *3.6即: F=3.6mm拍摄距离为2~6米拍摄角度93°
#6即F=6mm 拍摄距离为3~15米 拍摄角度为53°,#8即F=8mm 拍摄距离为4~20米 拍摄角度为40°,#12即F=12mm拍摄距离为5~25米 拍摄角度为25°,#16即F=16mm拍摄距离为5~30米 拍摄角度为20°#25:即F=25mm拍摄距离为20~80米拍摄角度为15°
监控摄像机镜头可视角度表
镜头焦距 | 搭配1/3″CCD | 搭配1/4″CCD | 二者差异性 |
2.8mm | 89.9° | 75.6° | 14.3° |
3.6mm | 75.7° | 62.2° | 13.5° |
4mm | 69.9° | 57.0° | 12.9° |
6mm | 50.0° | 39.8° | 10.2° |
8mm | 38.5° | 30.4° | 8.1° |
12mm | 26.2° | 20.5° | 5.7° |
16mm | 19.8° | 15.4° | 4.4° |
25mm | 10.6° | 8.3° | 2.3° |
60mm | 5.3° | 4.1° | 1.2° |
监控摄像机镜头可视距离表
镜头焦距(毫米数) | 距离5米(宽*高) | 距离10米(宽*高) | 距离15米(宽*高) | 距离20米(宽*高) | 距离30米(宽*高) |
2.8mm | 13*9.8米 | 26*19.5米 | 39*29.3米 | 52*39米 | 78*58.5米 |
3.6mm | 8.5*6.4米 | 17*12.8米 | 25.5*19米 | 34*25.5米 | 51*38.3米 |
4mm | 8*6米 | 16*12米 | 24*18米 | 32*24米 | 48*36米 |
6mm | 5.5*4.1米 | 11*8.3米 | 16.5*12.4米 | 22*16.5米 | 33*24.8米 |
8mm | 3.5*2.6米 | 7*5.3米 | 10.5*7.9米 | 14*10.5米 | 21*15.8米 |
12mm | 2*1.5米 | 4*3米 | 6*4.5米 | 8*6米 | 12*9米 |
16mm | 1.5*1.1米 | 3*2.3米 | 4.5*3.4米 | 6*4.5米 | 9*6.8米 |
25mm | 1.3*1米 | 2.5*1.9米 | 3.8*2.9米 | 5*3.8米 | 7.5*5.6米 |
60mm | 0.5*0.4米 | 1*0.75米 | 1.5*1.1米 | 2*1.5米 | 3*2.3米 |
监控摄像机镜头使用场所及角度
1、广角镜头:视角在90度以上,一般用于电梯轿箱内、大厅等小视距大视角场所 2.8MM 2.5MM
2、视角在60度以上,用于5*5米左右场所 3.6MM 4MM
3、视角在50度以上,用于8-10米左右场所 6MM
4、视角在40度以上,用于10-18米左右场所 8MM
5、视角在30度以上,用于20-30米左右场所 12MM 16MM
6、视角在20度以上,用于30-50米左右场所 25MM
7、长焦镜头:视角在20度以内,焦距的范围从几十毫米到上百毫米,用于远距离监视;
8、变焦镜头:镜头的焦距范围可变,可从广角变到长焦,用于景深大,视角范围广的区域;
9、针孔镜头:用于隐蔽监控。
镜头越小,监控的面积越大,而图像物体相对较小。镜头越大,监控的面积越小(窄),而图像物体相对较大。
计算方法1/3"CCD镜头最远能看清多少米?
3.6MM、6MM、8MM、12MM、16MM、25MM乘上2.4就是最远多少米距离了
可以简单的计算方法:可视距离÷2就相等于所需镜头,再参考视角
cif 640kb/s 300M每小时/每天7G
D1 2084kb/s 900M每小时/每天22G
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