A projection lens includes, in order from the magnification end to the minimization end thereof: a first lens group of a negative refractive power; and a second lens group of a positive refractive power. The projection lens satisfies the formula: 0.061<F/L<0.078; where F represents the effective focal length of the projection lens and L represent the total length of the projection lens.
申请公布号
US2012314303(A1)
申请公布日期
2012.12.13
申请号
US201113179574
申请日期
2011.07.11
申请人
LIU XIAO-NA;PENG FANG-YING;HUANG HAI-JO;LEE AN-TZE;WANG SHENG-AN;HON HAI PRECISION INDUSTRY CO., LTD.;PREMIER IMAGE TECHNOLOGY(CHINA) LTD.
发明人
LIU XIAO-NA;PENG FANG-YING;HUANG HAI-JO;LEE AN-TZE;WANG SHENG-AN
