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1. (WO2015122261) IMAGING LENS AND IMAGING DEVICE

Pub. No.:    WO/2015/122261    International Application No.:    PCT/JP2015/051969
Publication Date: Fri Aug 21 01:59:59 CEST 2015 International Filing Date: Tue Jan 27 00:59:59 CET 2015
IPC: G02B 13/00
A61B 1/00
G02B 13/18
G02B 23/24
Applicants: KONICA MINOLTA, INC.
コニカミノルタ株式会社
Inventors: SANO Eigo
佐野 永悟
KAWASAKI Takashi
川崎 貴志
Title: IMAGING LENS AND IMAGING DEVICE
Abstract:
Provided is an imaging lens which has a two-lens structure, minimizes the angle of incidence of the principal ray onto the imaging surface periphery and favorably corrects various aberrations while allowing a considerably more compactness in the radial direction than conventional imaging lenses; also provided is an imaging device. This imaging lens comprises, in order from the object side, a first lens with a negative refractive power and a concave surface facing the image side, an aperture stop, and a second lens with a positive refractive power and a convex surface facing the image side, and satisfies the following conditions. 0.74 < D3/f < 1.50 (1) 0.68 < ΦLmax/2Yd < 1.70 (2) Here, D3: the thickness on the optical axis of the second lens f: the focal distance of the entire imaging lens system ΦLmax: the effective diameter of the lens with the greatest effective diameter Yd: the maximum image height