(1) 總長67mm,倍率-8,以薄透鏡求解,焦距=67/(2+8+0.125)=6.617mm 1JWo~E'
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(2) 物距=6.617*1.125=7.44mm<10mm,像距=6.617*9=59.55mm>33mm J!@`tR-
所以需為telephoto型式(+ -) 4oA9|}<FR
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(3) 再設+ 透鏡焦距為f1,- 透鏡焦距為f2,兩鏡片間隔為d=67-33-10=24 >^ijj`{d
以(1/f1)+(1/f2)-d/(f1*f2)=1/6.617 及 (1-d*(1/f1))*6.617 =33 QTT2P(Pz
求解f1和f2即可