| 摘要 |
PROBLEM TO BE SOLVED: To provide a projection lens and a projection device using the lens capable of projecting the original picture of a projected picture displayed on a liquid crystal display element to the surface of a screen with high optical performance. SOLUTION: Picture information on plural color light beams based on plural display element is synthesized through a color synthesizing means and enlarged and projected by a projection lens PL to the surface of the screen S in this projection device. The lens PL is provided with a 1st lens group L1 having positive refractive power, a diaphragm, a means for folding an optical path, and a 2nd lens group L2 having negative refractive power in the above mentioned order from the display element side.
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