Projection lens

摘要

A projection lens includes a first lens group, a second lens group and a third lens group, all of which are arranged in sequence from an projection side to an image source side along an optical axis. The first lens group is with negative refractive power and includes four lenses. The second lens group is with positive refractive power and includes two lenses. The third lens group is with positive refractive power and includes a stop and six lenses.

主权项

1. A projection lens comprising a first lens group, a second lens group and a third lens group, all of which are arranged in sequence from a projection side to an image source side along an optical axis, wherein:
the first lens group is with negative refractive power and comprises a first lens, a second lens, a third lens and a fourth lens, all of which are arranged in sequence from the projection side to the image source side along the optical axis; the second lens group is with positive refractive power and comprises a fifth lens and a sixth lens, both of which are arranged in sequence from the projection side to the image source side along the optical axis; and the third lens group is with positive refractive power and comprises a stop, a seventh lens, an eighth lens, a ninth lens, a tenth lens, an eleventh lens and a twelfth lens, all of which are arranged in sequence from the projection side to the image source side along the optical axis.