# US 12,758,350 B2 · Microsurgery auxiliary device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,758,350 B2 - Document ID: US12758350B2 - Status: Granted - Kind: B2 - Application number: 18/027,646 - Filed: 2021-04-25 - Published: 2023-11-23 - Granted: 2026-10-13 - Earliest claimed: 2020-09-23 - Assignees: Zumax Medical Co., Ltd. - Applicants: Zumax Medical Co., Ltd - Inventors: Jilong Wang; Jin He; Jianyue Li; Lei Du; Chengjie Zhu - Web page: https://patentgrep.com/patent/US12758350B2 ## CPC - A61B 90/25: Supports therefor - A61B 90/30: Devices for illuminating a surgical field, the devices having an interrelation with other surgical devices or with a surgical procedure - A61B 2090/309: {using white LEDs} - A61B 2090/372: {Details of monitor hardware} - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) ## Abstract A microsurgery auxiliary device provided in the present invention, comprises a lens body (1) and a naked eye 3D display (2), the lens body (1) being internally provided with an imaging unit (10); the imaging unit (10) comprises a large objective lens group (11), a zoom lens group (12), a first tube objective lens (13) and a photosensitive element (14); the large objective lens group (11), the zoom lens group (12), the first tube objective lens (13) and the photosensitive element (14) are sequentially located in the same observation optical path; the large objective lens group (11) comprises at least one positive lens group (111) and at least one negative lens group (112), the positive lens group (111) and the negative lens group (112) are arranged in the same optical axis, and the spacing between the positive lens group (111) and the negative lens group (112) is adjustable; and the naked eye 3D display (2) is connected to the photosensitive element (14), the distance between the naked eye 3D display (2) and an observer (5) is 400-1200 mm, and the viewing angle range of the naked eye 3D display (2) is not less than 120 degrees. The observer can directly perform surgical operations by observing the naked eye 3D display (2), the overall structure of the device is simple, and the system delay is small. ## Claims ### Claim 1 A microsurgery auxiliary device, comprising a lens body and a naked eye 3D display, wherein the lens body is internally provided with an imaging unit, the imaging unit comprises a large objective lens group, a zoom lens group, a first tube objective lens and a photosensitive element, the large objective lens group, the zoom lens group, the first tube objective lens and the photosensitive element are sequentially positioned in the same observation optical path, the large objective lens group comprises at least one positive lens group and at least one negative lens group, the positive lens group and the negative lens group are arranged in the same optical axis, a distance between the positive lens group and the negative lens group is adjustable, the naked eye 3D display is directly connected to the photosensitive element, enabling low system delay between the naked eye 3D display and the photosensitive element and without complex data processing on image captured by the photosensitive element, wherein the microsurgery auxiliary device further comprises an acquisition device, a processing device and a driving device, the acquisition device is to acquire position information of human eyes of an observer, and the processing device is to control the driving device to rotate with the eyes of the observer to ensure that a viewing angle of the observer is in a range of not less than 120 degrees with respect to the naked eye 3D display while a distance between the naked eye 3D display and the observer is in a range of 400-1200 mm. ### Claim 2 (depends on 1) The microsurgery auxiliary device according to claim 1, wherein the positive lens group comprises at least two optical lenses made of different materials, the negative lens group comprises at least two optical lenses made of different materials, the negative lens group is close to an object to be observed, and comprises an outer side surface and an inner side surface, both the outer side surface and the inner side surface are concave surfaces, and an absolute value of radius of curvature of the outer side surface is smaller than an absolute value of radius of curvature of the inner side surface. ### Claim 3 (depends on 1) The microsurgery auxiliary device according to claim 1, wherein the adjustment range of the distance between the positive lens group and the negative lens group is not less than 6 mm. ### Claim 4 (depends on 1) The microsurgery auxiliary device according to claim 1, wherein the lens body is also internally provided with at least one illumination unit, the illumination light of each illumination unit can illuminate an object to be observed through the large objective lens group, and the direction of illumination light entering the large objective lens group is parallel to the direction of an optical axis of the large objective lens group; the illumination unit comprises a light source assembly, a condensing lens group, a diaphragm and a projection lens group which are sequentially positioned in the same illumination optical path; and the light source assembly comprises at least one LED light source, and at least one LED light source in the light source assembly can be driven to be switched to the illumination optical path to illuminate an object to be observed. ### Claim 5 (depends on 4) The microsurgery auxiliary device according to claim 4, wherein the projection lens group comprises at least one first lens, and the first lens can be driven to move along the optical axis direction thereof; and the zoom lens group is of a continuous zoom structure, and comprises at least two groups of second lenses, and the second lenses can be driven to move along respective optical axis directions. ### Claim 6 (depends on 5) The microsurgery auxiliary device according to claim 5, further comprising a transmission device, wherein the projection lens group and the zoom lens group are linked through the transmission device. ### Claim 7 (depends on 1) The microsurgery auxiliary device according to claim 1, wherein the microsurgery auxiliary device has a binocular observation optical path, wherein the microsurgery auxiliary device further comprises an observation unit, the observation unit comprises an eyepiece, a turning lens group and a second tube objective lens, the imaging unit further comprise a beam splitter group, in the same observation optical path, light sequentially passes through the large objective lens group and the zoom lens group to reach the beam splitter group, the beam splitter group splits the light into two parts, one part sequentially passes through the first tube objective lens to reach the photosensitive element, and the other part sequentially passes through the second tube objective lens, the turning lens group and the eyepiece. ### Claim 8 (depends on 7) The microsurgery auxiliary device according to claim 7, further comprising a support, wherein the support comprises a base, a supporting rod vertically mounted on the base, a large cross arm rotatably mounted on the supporting rod, a small cross arm rotatably mounted on the large cross arm, and a balance arm rotatably mounted on the small cross arm, and the lens body and the observation unit are mounted on the balance arm; the naked eye 3D display is mounted on the large cross arm or the supporting rod; or the microsurgery auxiliary device further comprises a base body and a connecting rod mounted on the base body; and the naked eye 3D display is mounted at one end of the connecting rod, and can be placed on the ground or hung on a roof through the base body and the connecting rod. ### Claim 9 (depends on 8) The microsurgery auxiliary device according to claim 8, wherein the other end of the connecting rod is movably mounted on the base body, the connecting rod can be driven to move along the axial direction thereof and/or the connecting rod can be driven to rotate by taking the axis thereof as a rotating shaft. ### Claim 10 (depends on 1) The microsurgery auxiliary device according to claim 1, wherein the size of the naked eye 3D display is between 12-16 inches; and the processing device can be configured to control the driving device to act according to the acquired position information of the human eyes so as to adjust a display angle of the naked eye 3D display.