Patent ID: 8369009
Filing Date: 2013-02-05
Classification: G02B

Abstract:
1. 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: