| 摘要 |
PROBLEM TO BE SOLVED: To obtain adequate imaging performance at a low cost by easily making corrections in a short time, the corrections being related to: fluctuations in various aberrations, such as an image face curve caused by a processing error in a parameter related to a lens configuration; an imaging face curve caused by line sensor curvature; and assembling eccentricity. SOLUTION: Three lenses of a diaphragm 3 on the object side, lenses E1, E2 and E3, compose a first lens group G1 and are held by a first holding member 1. Three lenses of the diaphragm 3 on the image side, lenses E4, E5 and E6, compose a second lens group G2 and are held by a holding member 2. The six lenses E1 to E6 are divided in the two lens groups G1 and G2 separately held with the diaphragm 3 between them. Adequate imaging performance is obtained by moving the first lens group G1 on the object side held by the first holding member 1 or/and the second lens group G2 on the image side held by the second holding member 2. COPYRIGHT: (C)2006,JPO&NCIPI
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