# US 7,612,945 B2 · Pyramidal microlens and camera lens structure using the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 7,612,945 B2 - Document ID: US7612945B2 - Status: Granted - Kind: B2 - Application number: 11/874,411 - Filed: 2007-10-18 - Published: 2008-06-12 - Granted: 2009-11-03 - Earliest claimed: 2006-12-11 - Assignees: Lumos Technology Co., Ltd. - Inventors: Chih-Yi Yang - Web page: https://patentgrep.com/patent/US7612945B2 ## CPC - G03B 3/00: Focusing arrangements of general interest for cameras, projectors or printers - G02B 3/02: with non-spherical faces (G02B3/10 takes precedence) - G03B: APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR (optical parts of such apparatus G02B; photosensitive materials or processes for photographic purposes G03C; apparatus for processing exposed photographic materials G03D) - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS ## Abstract In a microlens for observing a microstructure and a camera lens structure using the microlens, the microlens includes a frustum formed on a substrate. The frustum is placed to the observed hole of the microstructure, such that a user's naked eye may approach the substrate to observe a locally enlarging image of the inner surface of the hole. In addition, the microlens is able to be placed longitudinally in a hollow lens tube of a camera lens structure, which may be placed on a surface, such that the microlens may be used at any surface. ## Claims ### Claim 1 A microlens having magnifying function for observing a microstructure, comprising: a substrate having a plane surface and an arc-curved surface opposite to each other; and a frustum formed on the substrate with a base plane thereof being disposed on the circular plane surface, thereby light beams, reflected or refracted from an observed object of the microstructure, enters through the frustum for reflection in many times and penetrates through the substrate to generate a magnified image of the observed object for observation. ### Claim 2 (depends on 1) The microlens according to claim 1, wherein the frustum is a frustum of a cone. ### Claim 3 (depends on 1) The microlens according to claim 1, wherein the frustum is a frustum of a pyramid. ### Claim 4 (depends on 1) The microlens according to claim 1, wherein the arc-curved surface is a semispherical surface. ### Claim 5 (depends on 1) The microlens according to claim 1, wherein the arc-curved surface is a non-spherical surface. ### Claim 6 (depends on 1) The microlens according to claim 1, wherein an outer diameter of the plane surface is larger than that of the base plane. ### Claim 7 A camera lens structure having a microlens with magnification for observing a microstructure, comprising: a lens tube, two sides of which respectively have a viewing opening and an objective opening corresponding to the viewing opening; and a microlens, which is accommodated in the lens tube and has a frustum formed on a substrate, the frustum having a top plane corresponding to the objective opening and a base plane disposed on a plane surface of the substrate, and the substrate having an arc-curved surface which is opposite to the plane surface corresponding to the viewing opening. ### Claim 8 (depends on 7) The camera lens structure having a microlens according to claim 7, the lens tube further including: an upper lens tube, on which the viewing opening is located; a lower lens tube, which is inter-fitted with the upper lens tube, and on which the objective opening is located; and a supporting seat, which is arranged between the upper lens tube and the lower lens tube for supporting the microlens, and an axially central position of which has a through hole for the frustum to be arranged through and suspended in the lower lens tube. ### Claim 9 (depends on 7) The camera lens structure having a microlens according to claim 7, wherein the frustum is a frustum of a cone. ### Claim 10 (depends on 7) The camera lens structure having a microlens according to claim 7, wherein the frustum is a frustum of a pyramid. ### Claim 11 (depends on 7) The camera lens structure having a microlens according to claim 7, wherein the arc-curved surface is a smaller segment of a spherical surface. ### Claim 12 (depends on 7) The camera lens structure having a microlens according to claim 7, wherein the arc-curved surface is a non-spherical surface. ### Claim 13 (depends on 7) The camera lens structure having a microlens according to claim 7, wherein an outer diameter of the plane surface is larger than that of the base plane. ### Claim 14 (depends on 7) The camera lens structure having a microlens according to claim 7, the camera lens being arranged in an image recording device. ### Claim 15 (depends on 14) The camera lens structure having a microlens according to claim 14, wherein the image recording device is a digital camera.