# US 2014/0153114 A1 · Imaging lens > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0153114 A1 - Document ID: US20140153114A1 - Status: Published application - Kind: A1 - Application number: 14/053,658 - Filed: 2013-10-15 - Published: 2014-06-05 - Earliest claimed: 2012-12-05 - Assignees: Kantatsu Co., Ltd. - Applicants: Kantatsu Co., Ltd. - Inventors: Hisanori Suzuki - Web page: https://patentgrep.com/patent/US20140153114A1 ## CPC - G02B 13/0045: {having five or more lenses} - G02B 5/1895: {such optical elements having dioptric power} - G02B 9/60: having five components only - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS ## Abstract An imaging lens which can be very compact and thin, corrects various aberrations properly and provides a small F-value and a wide view angle at low cost. In the imaging lens, designed for a solid-state image sensor, arranged in the following order from an object side to an image side are: a first positive (refractive power) lens with a convex object-side surface; a second positive lens; a third positive lens; a fourth positive lens; and a fifth negative lens with a concave image-side surface. None of these lenses is joined to each other and all the lens surfaces are aspheric. The object-side and image-side aspheric surfaces of the fifth lens have a pole-change point in a position other than a point of intersection with an optical axis. A diffractive optical surface is formed on one of three surfaces from the first lens image-side surface to the second lens image-side surface. ## Claims ### Claim 1 An imaging lens for a solid-state image sensor in which lenses are arranged in order from an object side to an image side, comprising: a first lens with positive refractive power having a convex surface on the object side; a second lens with positive refractive power; a third lens with positive refractive power; a fourth lens with positive refractive power; and a fifth lens with negative refractive power having a concave surface on the image side, wherein none of the constituent lenses is joined to each other; wherein all the lens surfaces are aspheric; wherein an object-side aspheric surface and an image-side aspheric surface of the fifth lens have a pole-change point in a position other than a point of intersection with an optical axis; and wherein a diffractive optical surface is formed on one of three surfaces from the image-side surface of the first lens to the image-side surface of the second lens. ### Claim 2 (depends on 1) The imaging lens according to claim 1, wherein the first lens is a biconvex lens. ### Claim 3 (depends on 1) The imaging lens according to claim 1, wherein the first lens has an aspheric shape in which a more distant portion from the optical axis has weaker positive refractive power. ### Claim 4 (depends on 1) The imaging lens according to claim 1, wherein the second lens is a meniscus lens having a convex surface on the object side. ### Claim 5 (depends on 1) The imaging lens according to claim 1, wherein in the third lens a more distant portion from the optical axis has weaker positive refractive power and the refractive power changes to negative refractive power in a peripheral portion. ### Claim 6 (depends on 1) The imaging lens according to claim 1, wherein the fourth lens has a meniscus shape with a concave surface on the object side near the optical axis and in the fourth lens, a more distant portion from the optical axis has weaker positive refractive power and the refractive power changes to negative refractive power in a peripheral portion. ### Claim 7 (depends on 1) The imaging lens according to claim 1, wherein conditional expressions (1) to (3) below are satisfied: 1.0