Patent ID: 8605369
Filing Date: 2013-12-10
Classification: G02B

Abstract:
1. A projection lens system, in the order from the magnified side to the reduced side thereof, comprising: a first lens group with a negative refracting power, in the order from the magnified side to the reduced side of the projection lens system, the first lens group comprising a first lens having a negative refracting power, a second lens having a negative refracting power, a third lens having a negative refracting power, a fourth lens having a negative refracting power, a fifth lens having a positive refracting power, and, a sixth lens having a positive refracting power; a second lens group with a positive refracting power; and wherein the projection lens system satisfies the following condition: where F1 is the effective focal length of the first lens; F is the effective focal length of the projection lens system.