| 摘要 |
PURPOSE:To provide a stereoscopic projective lens whose aberration is corrected in telecentric state. CONSTITUTION:A stereoscopic projective lens is constituted by arranging a first lens group 10 formed by mutually bonding a first lens L1 having negative power arranged on an object side and a second lens L2 having positive power arranged on image side; a second lens group 20 consisting of a third lens L3 having positive power whose convex surface is turned on the image side; and a third lens group 30 consisting of a fourth lens L4 having positive power in this order from the object side to the image side. The stereoscopic projective lens satisfies an inequality (r2>0), (n1-n2>0.2) when the curvature radius of the bonding surface of the first and second lenses L1, L2 is r2, and the refractions of the first and second lenses L1, L2 are n1, n2, respectively. |
