# US 12,111,484 B2 · Imaging lens assembly, image capturing apparatus and electronic device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,111,484 B2 - Document ID: US12111484B2 - Status: Granted - Kind: B2 - Application number: 17/412,433 - Filed: 2021-08-26 - Published: 2022-07-14 - Granted: 2024-10-08 - Earliest claimed: 2021-01-13 - Assignees: Largan Precision Co., Ltd. - Applicants: Largan Precision Co., Ltd. - Inventors: Chih-Wei Cheng; Yu-Chen Lai; Ming-Ta Chou; Ming-Shun Chang - Web page: https://patentgrep.com/patent/US12111484B2 ## CPC - G02B 5/003: {Light absorbing elements} - G02B 5/005: {Diaphragms (for cameras G03B9/02)} - G02B 7/008: {with means for compensating for changes in temperature or for controlling the temperature; thermal stabilisation} - G02B 9/64: having more than six components - G02B 13/0045: {having five or more lenses} - G02B 13/02: Telephoto objectives, i.e. systems of the type + - in which the distance from the front vertex to the image plane is less than the equivalent focal length - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS ## Abstract An imaging lens assembly has an optical axis, and includes a plurality of optical elements. The optical elements include a light blocking sheet, and the light blocking sheet includes a through hole surface, a first surface, a second surface, a peripheral surface and a plurality of basin structures. The through hole surface surrounds the optical axis. The first surface and the second surface are connected to and surround the through hole surface. The peripheral surface is connected to the first surface and the second surface, and the peripheral surface is farther from the optical axis than the through hole surface from the optical axis. The basin structures are arranged in interval and around the optical axis, each of the basin structures is caved in from the first surface to the second surface, and each of the basin structures protrudes on the second surface. ## Claims ### Claim 1 An imaging lens assembly, having an optical axis, and comprising: a plurality of optical elements arranged along the optical axis, wherein the optical elements comprise a light blocking sheet, and the light blocking sheet comprises: a through hole surface surrounding the optical axis; a first surface connected to and surrounding the through hole surface; a second surface connected to and surrounding the through hole surface, and the first surface and the second surface relatively disposed; a peripheral surface connected to the first surface and the second surface, and the peripheral surface farther from the optical axis than the through hole surface from the optical axis; and a plurality of basin structures arranged in interval and around the optical axis, each of the basin structures caved in from the first surface to the second surface, and each of the basin structures protruding on the second surface; wherein on a direction passing through each of the basin structures and vertical to the optical axis, a nearest distance between each of the basin structures and the optical axis is Dn, a farthest distance between each of the basin structures and the optical axis is Df, a distance between the through hole surface and the optical axis is r, a distance between the peripheral surface and the optical axis is R, and the following condition is satisfied: 0.2≤(Df−Dn)/(R−r)≤0.98. ### Claim 2 (depends on 1) The imaging lens assembly of claim 1, wherein on the direction passing through each of the basin structures and vertical to the optical axis, the nearest distance between each of the basin structures and the optical axis is Dn, the farthest distance between each of the basin structures and the optical axis is Df, the distance between the through hole surface and the optical axis is r, the distance between the peripheral surface and the optical axis is R, and the following condition is satisfied: 0.45≤(Df−Dn)/(R−r)≤0.95. ### Claim 3 (depends on 1) The imaging lens assembly of claim 1, wherein on the direction passing through each of the basin structures and vertical to the optical axis, the nearest distance between each of the basin structures and the optical axis is Dn, the farthest distance between each of the basin structures and the optical axis is Df, the distance between the through hole surface and the optical axis is r, the distance between the peripheral surface and the optical axis is R, and the following conditions are satisfied: 1.01≤Dn/r≤2; and 0.5≤Df/R≤0.99. ### Claim 4 (depends on 3) The imaging lens assembly of claim 3, wherein on the direction passing through each of the basin structures and vertical to the optical axis, the nearest distance between each of the basin structures and the optical axis is Dn, the distance between the through hole surface and the optical axis is r, and the following condition is satisfied: 0.03 mm≤Dn−r≤2.0 mm. ### Claim 5 (depends on 3) The imaging lens assembly of claim 3, wherein on the direction passing through each of the basin structures and vertical to the optical axis, the farthest distance between each of the basin structures and the optical axis is Df, the distance between the peripheral surface and the optical axis is R, and the following condition is satisfied: 0.05 mm≤R−Df≤3.0 mm. ### Claim 6 (depends on 1) The imaging lens assembly of claim 1, wherein on the direction passing through each of the basin structures and vertical to the optical axis, the distance between the peripheral surface and the optical axis is R, the distance between the through hole surface and the optical axis is r, and the following condition is satisfied: 0.1≤r/R≤0.6. ### Claim 7 (depends on 1) The imaging lens assembly of claim 1, wherein a focal length of the imaging lens assembly is f, on the direction passing through each of the basin structures and vertical to the optical axis, the distance between the through hole surface and the optical axis is r, and the following condition is satisfied: 0.5≤f/2r≤6.4. ### Claim 8 (depends on 7) The imaging lens assembly of claim 7, wherein an aperture stop of the imaging lens assembly is formed by the through hole surface surrounding the optical axis. ### Claim 9 (depends on 1) The imaging lens assembly of claim 1, wherein a minimum spacing angle between two adjacent of the basin structures on the first surface centered on the optical axis is θ, and the following condition is satisfied: 1.5 degrees≤θ<180 degrees. ### Claim 10 (depends on 9) The imaging lens assembly of claim 9, wherein the minimum spacing angle between the two adjacent of the basin structures on the first surface centered on the optical axis is θ, a total of all of the minimum spacing angles is sum(θ), and the following condition is satisfied: 10 degrees≤sum(θ)≤350 degrees. ### Claim 11 (depends on 1) The imaging lens assembly of claim 1, wherein each of the basin structures is caved in from the first surface to the second surface to form a concave surface, an area of the concave surface is A, and the following condition is satisfied: 0.02 mm2≤A≤1.2 mm2. ### Claim 12 (depends on 11) The imaging lens assembly of claim 11, wherein the area of the concave surface is A, a ratio between a total of the areas of the concave surfaces of the basin structures and an area of the first surface is ratio(A), and the following condition is satisfied: 0.2%≤ratio(A)≤63.0%. ### Claim 13 (depends on 11) The imaging lens assembly of claim 11, wherein each of the basin structures extends and gradually expands towards a direction away from the optical axis. ### Claim 14 (depends on 1) The imaging lens assembly of claim 1, wherein on the first surface, a depth of each of the basin structures on the optical axis is H, and the following condition is satisfied: 0.005 mm≤H≤0.07 mm. ### Claim 15 (depends on 14) The imaging lens assembly of claim 14, wherein on the first surface, the depth of each of the basin structures on the optical axis is H, and the following condition is satisfied: 0.015 mm≤H≤0.05 mm. ### Claim 16 (depends on 14) The imaging lens assembly of claim 14, wherein a distance between the first surface and the second surface of the light blocking sheet on the optical axis is T, on the first surface, the depth of each of the basin structures on the optical axis is H, and the following condition is satisfied: 0.2≤H/T≤5.0. ### Claim 17 (depends on 1) The imaging lens assembly of claim 1, wherein a number of the basin structures is N, and the following condition is satisfied: 3≤N≤32. ### Claim 18 (depends on 17) The imaging lens assembly of claim 17, wherein the number of the basin structures is N, and the following condition is satisfied: 4≤N≤12. ### Claim 19 (depends on 1) The imaging lens assembly of claim 1, wherein the first surface of the light blocking sheet faces towards one of an object side and an image side of the imaging lens assembly. ### Claim 20 (depends on 1) The imaging lens assembly of claim 1, wherein the light blocking sheet further comprises a plurality of reverse basin structures arranged in interval and around the optical axis, each of the reverse basin structures is caved in from the second surface to the first surface, and each of the reverse basin structures protrudes on the first surface to form a convex surface. ### Claim 21 (depends on 20) The imaging lens assembly of claim 20, wherein the basin structures and the reverse basin structures are arranged in interval on a circumferential direction centered on the optical axis. ### Claim 22 (depends on 20) The imaging lens assembly of claim 20, wherein the reverse basin structures are farther from the optical axis than the basin structures from the optical axis. ### Claim 23 (depends on 1) The imaging lens assembly of claim 1, wherein the light blocking sheet is made of a plastic material, and the light blocking sheet further comprises a coating layer formed on at least one of the first surface and the second surface. ### Claim 24 (depends on 1) An image capturing apparatus, comprising: the imaging lens assembly of claim 1. ### Claim 25 (depends on 24) An electronic device, comprising: the image capturing apparatus of claim 24; and an image sensor corresponding to the image capturing apparatus, and the image sensor disposed on an image surface of the imaging lens assembly.