Patent ID: 8369009

Claim:
A near infrared (NIR) imaging lens assembly comprising: a lens element with refractive power, made of a substantially visible-light-absorbable material; and a filter for filtering out infrared light; wherein the number of lens elements with refractive power in the NIR imaging lens assembly is N, the lens element with refractive power made of a substantially visible-light-absorbable material has an average transmittance percentage of TA_S for light in the wavelength range of 400 to 600 nm and TA_L for light in the wavelength range of 900 to 1050 nm, half of the maximum field of view of the NIR imaging lens assembly is HFOV, a maximum angle of incidence of a chief ray on an electronic photo sensor of the NIR imaging lens assembly is CRA, and satisfy the following relations: N≧2, TA_S<20%, TA_L>60%, and 1.0 <HFOV/CRA< 12.0.