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作者: ylchen    时间: 2005-3-15 00:31
标题: [求助]


<P > 鏡頭規格
      1P(plastic)
      EPD  <st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="True" SourceValue="0.6" UnitName="mm">0.6 mm</st1:chmetcnv>
      magnification 1:8
      field of view    140度
      min detectable object  less than <st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="False" SourceValue="0.1" UnitName="mm">0.1mm</st1:chmetcnv><FONT face="Times New Roman" size=3> </FONT></P>
<P >      設計要求
      Image Sensor Size <st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="False" SourceValue="3.8" UnitName="mm">3.8mm</st1:chmetcnv> Diagonal (VGA640*480)CMOS sensor
      Total Length <st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="False" SourceValue="2.56" UnitName="mm">2.56mm</st1:chmetcnv>
      BFL <st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="False" SourceValue="1" UnitName="mm">1mm</st1:chmetcnv></P>
<P >      物距=<st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="False" SourceValue="9" UnitName="mm">9mm</st1:chmetcnv>
      FOV  140 degrees
      
      得到的結果
      EFL=<st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="True" SourceValue="1.07" UnitName="mm">1.07 mm</st1:chmetcnv>…………..(1)    (1)/(2)=<st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="False" SourceValue="0.6" UnitName="mm">0.6mm</st1:chmetcnv><p></p></P>
<P >BFL=<st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="True" SourceValue="1.28" UnitName="mm">1.28 mm</st1:chmetcnv><p></p></P>
<P >Total Length=<st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="True" SourceValue="2.26" UnitName="mm">2.26 mm</st1:chmetcnv>
       FNO=1.78…………(2)   f-number
       FOV=120 degrees<p></p></P>
<P >Image Height= <st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="False" SourceValue="1.9" UnitName="mm">1.9mm</st1:chmetcnv>
Maximum Chief Ray Angle =28 degrees
Distortion=40%
Relative Illumination at 0.9 field = 49%
                 35 lp/mm         50 lp/mm
      0 field     63%           39%   
    0.5 field     28%           15%</P>
<P > </P>
<P > </P>
<P > </P>
<P >有誰可以fit這個spec的,請幫幫忙,小弟做了好久都做不出來</P>
<P >ps:這是code V 跑出來ㄉ結果</P>
<P >哪各高手可以完成,小弟感激不進</P>

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