# US 2019/0167472 A1 · Multiple spot photomedical treatment using a laser indirect ophthalmoscope > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0167472 A1 - Document ID: US20190167472A1 - Status: Published application - Kind: A1 - Application number: 16/238,460 - Filed: 2019-01-02 - Published: 2019-06-06 - Earliest claimed: 2005-11-16 - Assignees: Topcon Medical Laser Systems, Inc. - Applicants: Topcon Medical Laser Systems, Inc. - Inventors: Dan E. ANDERSEN; David H. MORDAUNT - Web page: https://patentgrep.com/patent/US20190167472A1 ## CPC - A61F 9/008: using laser - A61B 3/0008: {provided with illuminating means (A61B3/117, A61B3/14 take precedence)} - A61B 3/12: for looking at the eye fundus, e.g. ophthalmoscopes (A61B3/13 takes precedence) - A61F 9/00821: {for coagulation} - A61F 9/00823: {Laser features or special beam parameters therefor} - A61B 2018/00916: {with means for switching or controlling the main function of the instrument or device} - A61B 2018/2025: {with a pilot laser} - A61B 2018/2205: {Characteristics of fibres} - A61B 2090/502: {Headgear, e.g. helmet, spectacles} - A61F 2009/00863: {Retina} - A61F 2009/00897: {Scanning mechanisms or algorithms} - A61N 2005/0643: {Applicators, probes irradiating specific body areas in close proximity} - A61F: FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS (dental prosthetics A61C) - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) - A61N: ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY (measurement of bioelectric currents A61B; surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body A61B18/00; anaesthetic apparatus in general A61M; incandescent lamps H01K; infrared radiators for heating H05B) ## Abstract A laser indirect ophthalmoscope (LIO) apparatus for photomedical treatment and/or diagnosis is presented. The LIO apparatus allows multiple spot ophthalmic surgery to be performed in a wider range of patient positions and less intrusively than currently available methods. The LIO apparatus utilizes a separate or integral beam multiplier that generates one or more optical beams via spatial and/or temporal separation, and an optical system that conditions and directs the one or more optical beams to a target to form a pattern. The LIO apparatus includes a headset, and is therefore wearable by the user (e.g., a physician). ## Claims ### Claim 1 A photomedical system for treating eye tissue comprising: a treatment light source configured to generate a treatment light beam; a headset designed to be worn by a user, wherein the headset includes: an optical input configured to receive the treatment light beam; a beam multiplier configured to receive the treatment light beam and generate a plurality of treatment sub-beams by spatial separation of the treatment light beam; and a moveable mirror configured to receive the plurality of treatment sub-beams and project the plurality of treatment sub-beams on the eye tissue in the form of a treatment pattern; and control electronics configured to cause the treatment light source, the beam multiplier, and the moveable mirror to automatically form the treatment pattern on the eye tissue. ### Claim 2 (canceled) ### Claim 3 (depends on 1) The system of claim 1, wherein the beam multiplier is configured to receive the treatment light beam from the optical input. ### Claim 4 (depends on 1) The system of claim 1, wherein the treatment pattern comprises a plurality of discrete spots on the eye tissue. ### Claim 5 (depends on 1) The system of claim 1, wherein the treatment pattern comprises a plurality of straight or curved lines on the eye tissue. ### Claim 6 (depends on 3) The system of claim 3, wherein the headset further includes a zooming lens located between the optical input and the beam multiplier for adjusting a size of the treatment beam. ### Claim 7 (depends on 1) The system of claim 1, wherein the headset further includes a zooming lens located after the beam multiplier for adjusting a size of the plurality of treatment sub-beams. ### Claim 8 (depends on 3) The system of claim 3, wherein the headset further includes a collimating lens located between the optical input and the beam multiplier. ### Claim 9 (depends on 1) The system of claim 1, wherein the beam multiplier comprises a beam scanner configured to refract or reflect the treatment light beam, and wherein the plurality of treatment sub-beams are further generated by the beam scanner via temporal separation of the spatially-separated treatment light beam. ### Claim 10 (depends on 1) The system of claim 1, wherein the beam multiplier comprises: a first scanner configured to deflect the treatment light beam in a first direction; and a second scanner configured to deflect the treatment light beam in a second direction perpendicular to the first direction. ### Claim 11 (depends on 1) The system of claim 1, wherein the beam multiplier comprises a moving lens configured to refract the treatment light beam at a different angle depending on the location of the moving lens when the moving lens receives the treatment light beam. ### Claim 12 (depends on 11) The system of claim 11, wherein the moving lens is configured to spin about an off-center axis. ### Claim 13 (depends on 1) The system of claim 1, wherein the beam multiplier comprises a rotating prism configured to refract the light at different angles depending on an orientation of the rotating prism. ### Claim 14 (depends on 1) The system of claim 1, wherein the beam multiplier generates the plurality of treatment sub-beams by simultaneously dividing the treatment light beam into the plurality of treatment sub-beams. ### Claim 15 (depends on 1) The system of claim 1, wherein the beam multiplier comprises a transmissive diffraction element for converting the treatment light beam into the plurality of treatment sub-beams. ### Claim 16 (depends on 1) The system of claim 1, wherein the beam multiplier comprises a reflective diffraction element for converting the treatment light beam into the plurality of treatment sub-beams. ### Claim 17 (depends on 1) The system of claim 1, wherein the beam multiplier comprises a dispersion compensating element. ### Claim 18 (depends on 1) The system of claim 1, wherein the beam multiplier comprises a plurality of beam splitters. ### Claim 19 (depends on 1) The system of claim 1, wherein the beam multiplier includes an adaptive optic. ### Claim 20 (depends on 1) The system of claim 1, wherein the beam multiplier comprises an anamorphic correction element. ### Claim 21 (depends on 20) The system of claim 20, wherein the anamorphic correction element includes an adaptive optic or a cylindrical lens. ### Claim 22 (depends on 1) The system of claim 1, wherein the beam multiplier comprises a plurality of optical fibers. ### Claim 23 (depends on 22) The system of claim 22, wherein the beam multiplier further comprises a scanning element configured to sequentially deliver the treatment light beam to one or more of the plurality of optical fibers. ### Claim 24 (depends on 1) The system of claim 1, wherein the beam multiplier comprises: a first optical fiber; a plurality of optical fibers; and a fiber splitter configured to receive the treatment light beam from the first optical fiber and to direct the treatment light beam to the plurality of optical fibers. ### Claim 25 (depends on 1) The system of claim 1, wherein the beam multiplier comprises: a first optical fiber; a plurality of optical fibers; and a fiber switch configured to receive the treatment light beam from the first optical fiber and to sequentially direct the treatment light beam to the plurality of optical fibers. ### Claim at position 26 26-28. (canceled) ### Claim 29 (depends on 1) The system of claim 1, wherein the beam multiplier comprises an adjustable aperture configured to create the plurality of treatment sub-beams having a shape that is different from that of the treatment light beam. ### Claim 30 (depends on 1) The system of claim 1, further comprising an aiming light source configured to generate an aiming beam that is combined with the treatment light beam. ### Claim 31 (depends on 22) The system of claim 22, wherein the beam multiplier is configured to adjust a spacing of the fibers. ### Claim at position 30 32-37. (canceled) ### Claim 38 (depends on 4) The system of claim 4, wherein a number of discrete spots in the plurality of discrete spots is greater than a number of treatment sub-beams in the plurality of treatment sub-beams. ### Claim 39 (depends on 9) The system of claim 9, wherein the moveable mirror is positioned one focal length away from an optical midpoint of the beam scanner such that the moveable mirror telecentrically scans the plurality of treatment sub-beams. ### Claim 40 (depends on 1) The system of claim 1, wherein the moveable mirror comprises an optical coating, and wherein the optical coating white balances the plurality of treatment sub-beams. ### Claim 41 (depends on 1) The system of claim 1, further comprising an ophthalmic lens configured to receive the plurality of treatment sub-beams and project the plurality of treatment sub-beams such that the plurality of treatment sub-beams converge at a common point at an iris of the eye prior to being projected on the eye tissue.