望远镜系统光学设计

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1、内调焦准距式望远系统一、技术参数选择；选择技术要求如下：放大率：G=24´　　　　　　　　　　加常数：c=0分辨率：j£4²最短视距：Ds=2m视场角：2w=1.6°筒　　长：LT=160mm乘常数：k=100取G=-24´，取不同的筒长L和缩短系数Q，根据表2-1表2-1　　　　　　　　　　　　　　　　　　　　G=-24´L=150mmQf¢12f¢1d0f¢2f¢3l¢F(l¢2)l2a20.55272.73121.2098.16-41.4711.3651.8423.045.060.60250.00123.9798.36-50.8010.4251.6525

2、.614.080.65230.77126.8398.56-62.769.6251.4428.273.310.70214.28129.8098.77-78.718.9351.2231.032.720.75200.00132.8798.97-101.008.3351.0333.092.250.80187.50136.0599.17-134.407.8150.8336.881.90L=160Qf¢12f¢1d0f¢2f¢3l¢F(l¢2)l2a20.55290.91129.28104.71-44.2212.1255.2924.575.060.60266.67132.

3、23104.92-54.1711.1155.0827.314.080.65246.15135.29105.14-66.9410.2654.8630.153.310.70228.57138.45105.35-83.959.5254.6433.102.720.75213.33141.73105.57-107.748.8954.4336.162.250.80200.00145.12105.78-143.378.3354.2239.341.90L=170Qf¢12f¢1d0f¢2f¢3l¢F(l¢2)l2a20.55309.09137.36111.25-46.9912

4、.8858.7526.115.060.60283.33140.50111.48-57.5711.8058.5629.024.080.65261.54143.74111.71-71.1110.9058.2832.033.310.70242.86147.11111.94-89.2010.1258.0635.172.720.75226.67150.59112.17-114.479.4457.8338.422.250.80212.50154.20112.40-152.368.8557.6041.801.90L=180Qf¢12f¢1d0f¢2f¢3l¢F(l¢2)l2

5、a20.55327.27145.44117.80-49.7513.6462.2027.645.060.60300.00148.76118.04-60.9412.5061.9530.724.080.65276.92152.20118.26-75.3111.5461.7233.923.310.70257.14155.76118.52-94.4610.7161.4827.242.720.75240.00159.45118.76-121.2410.0061.2440.692.250.80225.00163.26119.01-161.269.37560.9844.251

6、.90取适当的L和Q，我取：G=-24´，　L=170，　　　Q=0.60f¢12=233.33，　d0=111.48f¢1=140.50，　f¢2=-57.57，　　f¢3=11.80代入检验公式为：(2-4)将所确定的参数代入，得：c=0.00254由此可见，系统满足准距条件，其所引起的测量误差可以忽略不计。二、外形尺寸计算；1、物镜通光孔径及出瞳大小为了满足分辨率的要求，即j£4²，由得：另一方面，由可知，为了提高测量精度，出瞳直径D¢=1.3~1.5mm，一般取D¢=1.5mm，则：D=-GD¢³24´1.5=36mm因此，取入瞳直径，即物镜的通光孔径

7、D1=36mm，对应的出瞳直径D¢=1.5mm。2、调焦镜的通光孔径D2=D1-d0(D1/f¢1-2tgw)=36-111.48´(36/140.50-2´tg0.8°)=10.55mm3、分划板直径及视距丝间隔4、像方视场角tgw¢=-Gtgw=24´tg0.8°=0.33512499所以像方视场角2w¢=37.05°。出瞳距因lz1=0，所以l¢z1=0，lz2=l¢z1-d0=-111.48于是得出瞳距为：目镜的通光孔径目镜的视度调节5、调焦镜的调焦移动量取l1=-2000mm，由物像关系的高斯公式，计算得l¢z=154.87。由公式(1-6)计算得：

8、=128.77mm于是得调焦镜的调焦量