| 摘要 |
PROBLEM TO BE SOLVED: To provide a small high-performance imaging lens suppressing the occurrence of a flare and a ghost image being an optical failure due to stray light and sufficiently reduced in various aberrations.SOLUTION: An imaging lens uses a junction type compound lens using glass and a resin to appropriately control differences in refractive index and Abbe number between the resin and the glass to thereby control interface reflection when a light beam having a large incident angle enters, thus suppressing the occurrence of a flare or a ghost image. The imaging lens satisfies the following formulas: (1) N≤N≤N, (2) 0.08≤N-N≤0.15, (3) 0≤N-N≤0.1, (4) 0≤N-N≤0.1, (5) |υ-υ|≤30, (6) |υυ|≤32.48 and (7) 29.5≤υ-υ≤40, and (8) υ≥50, where Nis a refractive index of an object side resin lens, Nis a refractive index of a parallel plate glass, Nis a refractive index of an image side resin lens, υis an Abbe's number of the object side resin lens, υ: an Abbe number of the parallel plate glass, and υis an Abbe number of the image side resin lens. |
