Nanchang O-film Optical-electronic Tech Co., Ltd.

O-film. Japan Co., Ltd.

Tomio Tabata

An imaging lens includes, in order from an object side to an image side, a first lens having two surfaces both being convex aspheric surfaces; a second lens being aspherical and having a negative refractive power; a third lens being aspherical and having a positive refractive power; a fourth lens being aspherical and having a negative refractive power; and a fifth lens being aspherical, the fifth lens having a concave rear surface facing the image side on the optical axis, the rear surface having an inflection point at a position near its circumference, the fifth lens having a front surface facing the object side, the front surface having a smaller curvature than any other lens surface, and the fifth lens serves also as an infrared cut filter; wherein the imaging lens satisfies the following conditions: (1) TTL/2ih&#x3c;0.85; and (2) 0.7&#x3c;ih/f&#x3c;1.1.

Imaging lens and imaging device having the same

An imaging optical system, including: a first lens being a meniscus lens with a positive refractive power, the first lens having a convex surface facing the object side; a second lens being a biconvex lens; a third lens being a meniscus lens with a negative refractive power, the third lens having a convex surface facing the object side; a fourth lens being a meniscus lens, the fourth lens having a convex surface or a concave surface facing the object side; a fifth lens having a concave surface facing the object side; and a sixth lens having a convex surface facing the image side; at least one surface of two surfaces of the lenses Lto Lhas an aspherical shape. The imaging optical system satisfies the following conditions (1) and (2):0.23&#x3c;&#x3c;0.29&#x2003;&#x2003;(1)0.9&#x3c;TTL/&#x3c;1.0&#x2003;&#x2003;(2).

Growing community of inventors

Tokyo, Japan

Tomio Tabata