| 摘要 |
PROBLEM TO BE SOLVED: To provide a projection zoom lens that effectively suppresses changes in various aberrations during zooming from a wide-angle end to a telephoto end and that can correspond to a wide viewing angle. ! SOLUTION: A projection zoom lens comprises a projection optical system of an image display device in which a projection image displayed on a display surface of an image display element is projected as an enlarged image of the projection image on a projected surface to be displayed in enlargement, and includes a 6 lens group in which a first lens group G1 to a sixth lens group G6 are arranged in order from an enlargement side to a reduction side. Both the first lens group G1 and the second lens group G2 have negative refractive power, both the third lens group G3 and the fourth lens group G4 have positive refractive power, the fifth lens group G5 has positive or negative refractive power, and the sixth lens group has positive or negative refractive power. An absolute value of refractive po |
