| 摘要 |
PURPOSE:To realize compact constitution by using a four-element symmetric cella type, adding an auxiliary lens for magnification variation while moving this main lens, and thus varying focal length without varying conjugate length. CONSTITUTION:A main lens A has -x copying magnification, 241.89 focal length, and effective No.10.0 while having parameters so that r1=-r8=84.620, r2=-r7=-200.304, r3=-r6=-109.121, and r4=-r5=116.330, d1=d7=19.08, d2= d6=5.23, d3=d5=4.56, and d4=5.71, n1=n4=1.6779 and n2=n3=1.57616, and nu1=nu4=55.4 and nu2=nu3=41.4. For magnification variation, an auxiliary lens B having parameters so that r9=-683.57 and r10=-624.49, d8=5.0 and d9=5.0, n5=1.5168, and nu5=64.1 is added to the main lens A. |
