| 摘要 |
An optical projection lens system comprising in direction of propagating radiation: a first lens group having positive refractive power, a second lens group having negative refractive power and comprising a waist with a minimum diameter of the propagating radiation, and a further lens arrangement with positive refracting power, which follows the second lens group, wherein at least one lens of the projection lens system, which is arranged in front of the waist comprises an aspherical surface.
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