# US 11,442,345 B2 · Suspension system for adjusting projected light images > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,442,345 B2 - Document ID: US11442345B2 - Status: Granted - Kind: B2 - Application number: 17/277,540 - Filed: 2019-09-18 - Published: 2022-02-03 - Granted: 2022-09-13 - Earliest claimed: 2018-09-18 - Assignees: Skyphos Industries Inc. - Applicants: Skyphos Industries, Inc. - Inventors: Walter McAllister - Web page: https://patentgrep.com/patent/US11442345B2 ## CPC - G02B 7/022: {lens and mount having complementary engagement means, e.g. screw/thread} - G03B 21/142: {Adjusting of projection optics} - B29C 64/129: characterised by the energy source therefor, e.g. by global irradiation combined with a mask - B29C 64/264: Arrangements for irradiation - B33Y 30/00: Apparatus for additive manufacturing; Details thereof or accessories therefor - F16F 15/067: using only wound springs - G02B 27/64: Imaging systems using optical elements for stabilisation of the lateral and angular position of the image - G03B 21/008: {using micromirror devices} - G03B 21/147: {Optical correction of image distortions, e.g. keystone} - F16F 2228/08: pre-stressed - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS - 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) - B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00) - B33Y: ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING - F16F: SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION ## Abstract A suspension system including a set of optics which adjust the size and focus of the projection image originating at a Digital Micro-Mirror Device mirror set. The suspension and adjustment system for these optics may be mounted between the Digital Micro-Mirror Device housing and the optics carrier. This system has the capability to both adjust the resulting size and focus of the image at the same distance to a wall, as well as adjust for out-of-plane issues which often result in skewed images. This results in an adjustable focal and image size differing from the manufacturer's intended throw pattern and allowing broader use of the projector to make smaller images at the same throw distance. ## Claims ### Claim 1 A suspension system comprising: a. a mounting apparatus positioned in proximity to a projection system, or containing a projection system, wherein the projection system comprises one or more of a Digital Micro-Mirror Device, a Liquid Crystal Display Screen, and/or a Laser galvanometer; b. an optic or optics comprising one or more lenses; and c. an attachment mechanism linking the optic or optics and the mounting apparatus, wherein the attachment mechanism comprises one or more of a screw, a hollow or telescoping screw with or without a spring or springs, a piston or hollow piston, a linear actuating device, a computer-numerically-controlled (CNC) actuator, and/or a stepper motor; d. wherein the system is capable of being used in association with three-dimensional printing or additive manufacturing; and e. wherein a minimum pixel pitch formed by the suspension system is from 0.1 um to 2 mm. ### Claim 2 (depends on 1) The suspension system of claim 1, wherein the optic or optics are suspended from a solid body, and wherein the optic or optics are connected to the solid body by adjustable fasteners, which are capable of allowing an adjustment of a distance between the optic or optics and the solid body. ### Claim 3 (depends on 2) The suspension system of claim 2, wherein the optic or optics is capable of being moved closer to or farther from the solid body either continuously or by incremental steps. ### Claim 4 (depends on 1) The suspension system of claim 1, further comprising one or more optical conditioner and/or filters. ### Claim 5 (depends on 4) The suspension system of claim 4, wherein the one or more optical conditioner comprises one or more of a band-pass filter, an optical plate, and optical gate, a microchannel plate, a lens, and/or a collimator. ### Claim 6 (depends on 4) The suspension system of claim 4, wherein the one or more optical conditioner is placed between a projector body and the optic or optics, or between an optical carrier, between lenses, or between lenses and a vat projection. ### Claim 7 (depends on 6) The suspension system of claim 6, wherein the lenses comprise one or more of poly-methyl-methacrylate (PMMA), Borosilicate Glass, and/or other optically clear solid, wherein the PMMA or Borosilicate Glass is optically clear, optically semi-clear, or optically programmed. ### Claim 8 (depends on 1) The suspension system of claim 1, wherein one or more filters or one or more optical conditioners are capable of being introduced or located between a light source and the optic or optics. ### Claim 9 (depends on 1) The suspension system of claim 1, further comprising an optic mount for holding the optic or optics, wherein the optic mount is adjustably attached to the Digital Micro-Mirror Device or a Digital Micro-Mirror Device housing using one or more screws or other attachment mechanisms. ### Claim 10 A suspension system comprising: a. a mounting apparatus positioned in proximity to a projection system, or containing a projection system, wherein the projection system comprises one or more of a Digital Micro-Mirror Device, a Liquid Crystal Display Screen, and/or a Laser galvanometer; b. an optic or optics comprising one or more lenses; and c. an attachment mechanism linking the optic or optics and the mounting apparatus, wherein the attachment mechanism comprises one or more of a screw, a hollow or telescoping screw with or without a spring or springs, a piston or hollow piston, a linear actuating device, a computer-numerically-controlled (CNC) actuator, and/or a stepper motor; d. wherein the system is capable of being used in association with three-dimensional printing or additive manufacturing; and e. wherein an orientation between the optic or optics and a projected plane is capable of being adjusted to one or more of the following positions: (i) 0 degrees along a z axis, and allowing for increasing or decreasing a distance between the optic or optics and a projected image and the Digital Micro-Mirror Device, thereby being capable of changing the focal plane and pixel sizes to limits of ultraviolet light; (ii) Spatially along an x-y plane in relation to a projected image, including centering the optic or optics over the projected image; and/or (iii) A 45 degrees or less tilt to a z axis in an x-y plane, allowing a tilt in any direction to cause, reduce, eliminate, or enhance a keystone effect(s). ### Claim 11 (depends on 10) The suspension system of claim 10, wherein the optic or optics are suspended from a solid body, and wherein the optic or optics are connected to the solid body by adjustable fasteners, which are capable of allowing an adjustment of a distance between the optic or optics and the solid body. ### Claim 12 (depends on 11) The suspension system of claim 11, wherein the optic or optics is capable of being moved closer to or farther from the solid body either continuously or by incremental steps. ### Claim 13 (depends on 10) The suspension system of claim 10, further comprising one or more optical conditioner and/or filters. ### Claim 14 (depends on 13) The suspension system of claim 13, wherein the one or more optical conditioner comprises one or more of a band-pass filter, an optical plate, and optical gate, a microchannel plate, a lens, and/or a collimator. ### Claim 15 (depends on 13) The suspension system of claim 13, wherein the one or more optical conditioner is placed between a projector body and the optic or optics, or between an optical carrier, between lenses, or between lenses and a vat projection. ### Claim 16 (depends on 15) The suspension system of claim 15, wherein the lenses comprise one or more of poly-methyl-methacrylate (PMMA), Borosilicate Glass, and/or other optically clear solid, wherein the PMMA or Borosilicate Glass is optically clear, optically semi-clear, or optically programmed. ### Claim 17 (depends on 10) The suspension system of claim 10, wherein one or more filters or one or more optical conditioners are capable of being introduced or located between a light source and the optic or optics. ### Claim 18 (depends on 10) The suspension system of claim 10, further comprising an optic mount for holding the optic or optics, wherein the optic mount is adjustably attached to the Digital Micro-Mirror Device or a Digital Micro-Mirror Device housing using one or more screws or other attachment mechanisms. ### Claim 19 A suspension system comprising: a. a mounting apparatus positioned in proximity to a projection system, or containing a projection system, wherein the projection system comprises one or more of a Digital Micro-Mirror Device, a Liquid Crystal Display Screen, and/or a Laser galvanometer; b. an optic or optics comprising one or more lenses; and c. an attachment mechanism linking the optic or optics and the mounting apparatus, wherein the attachment mechanism comprises one or more of a screw, a hollow or telescoping screw with or without a spring or springs, a piston or hollow piston, a linear actuating device, a computer-numerically-controlled (CNC) actuator, and/or a stepper motor; d. wherein the system is capable of being used in association with three-dimensional printing or additive manufacturing; e. wherein the optic or optics are suspended from a solid body, and wherein the optic or optics are connected to the solid body by adjustable fasteners, which are capable of allowing an adjustment of a distance between the optic or optics and the solid body; f. wherein the optic or optics is capable of being moved closer to or farther from the solid body either continuously or by incremental steps; g. wherein the optic or optics are capable of being moved closer to or farther from the solid body by an adjustable screw, a piston distance, a stepper-motor, or combinations thereof, before or during the three-dimensional printing or additive manufacturing; and f. wherein the pixel pitch formed ranges between about 0.1 um and about 2 mm.