Board logo

標題: 計算ip camera viewing angle公式 [打印本頁]
作者: admin    時間: 2008-9-29 01:49 PM     標題: 計算ip camera viewing angle公式

1/3"      CCD will have a wider viewing angle(15°more) than 1/4" CCD.In general,      2.5mm~2.8mm is suitable for shooting distance that is less than 15 ft      CCD size and Lens focal length will affect the viewing angle. The following      table is a summary of viewing angle for different CCD and Lens.
      
                                                                          
   1/4" CCD (Dome type)1/3" CCD (Dome type)1/3" CCD (Standard type)
2.5mm95130120
3.6mm7090-
4mm--70
4.3mm6080-
6mm507053
8mm355040
12mm253025
16mm202520
25mm91512
      
      To select a suitable lens please follow the following steps <A>      Measure the distance between the camera and the shooting target. We call      this the viewing distance--L <B> Measure the viewing width--W. Use      the following trigonometric formula to find out the viewing angle.           Viewing angle = 2 * Arc tan (W/2L)

圖片附件: ViewAngle.jpg (2008-9-29 01:49 PM, 14.8 KB) / 下載次數 2
http://26fun.com/bbs/attachment.php?aid=1292734&k=14834298ad9b251e2abe4bc67d32e242&t=1719611706&sid=x1YEE2





歡迎光臨 娛樂滿紛 26FUN (http://26fun.com/bbs/) Powered by Discuz! 7.0.0