| 摘要 |
A projection lens includes a first lens having a negative refractive power, a second lens having a positive refractive power, a third lens having a negative refractive power and including§a first component lens having a negative refractive power and a second component lens having a positive refractive power, and a fourth lens having a positive refractive power. The first, second, third and fourth lens are arranged in that order from a screen side toward an image surface side to form a telecentric system toward the image surface side. A surface on the image surface side of the first lens, and a surface (33) on the image surface side of the second component lens of the third lens are aspherical.
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