# US 2024/0197162 A1 · Hand-held scanner > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2024/0197162 A1 - Document ID: US20240197162A1 - Status: Published application - Kind: A1 - Application number: 18/286,915 - Filed: 2022-04-12 - Published: 2024-06-20 - Earliest claimed: 2021-04-14 - Assignees: Medit Corp. - Applicants: Medit Corp. - Inventors: Eun Gil JO; Sang Cheol LEE - Web page: https://patentgrep.com/patent/US20240197162A1 ## CPC - A61B 1/24: for the mouth, i.e. stomatoscopes, e.g. with tongue depressors; Instruments for opening or keeping open the mouth - A61B 1/00172: {with means for scanning} - G01B 11/25: by projecting a pattern, e.g. {one or more lines,} moiré fringes on the object (G01B11/255 takes precedence {; image analysis for depth or shape recovery G06T7/50}) - G02B 13/0095: {Relay lenses or rod lenses (in instruments for viewing the inside of hollow bodies G02B23/2446)} - G02B 26/0833: {the reflecting element being a micromechanical device, e.g. a MEMS mirror, DMD (G02B26/0825 takes precedence; micromechanical devices in general B81B)} - G02B 26/101: {with both horizontal and vertical deflecting means, e.g. raster or XY scanners (colour television using laser beams scanning a display screen H04N9/3129)} - G02B 27/00: Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 - G02B 27/28: for polarising (used in stereoscopes G02B30/25) - G02B 27/283: {used for beam splitting or combining} - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) - G01B: MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS ## Abstract Provided is a hand-held scanner including: a body in a longitudinal direction; and an optical engine provided in the body and configured to output light, wherein the optical engine includes: a lighting unit configured to emit, along a first axis, light generated from at least one light source; and a projection unit configured to project light emitted from the lighting unit, along a second axis being parallel to the first axis, and wherein directions of the first axis and the second axis are equal. ## Claims ### Claim 1 A hand-held scanner comprising: a body in a longitudinal direction; and an optical engine provided in the body and configured to output light, wherein the optical engine comprises: a lighting unit configured to emit, along a first axis, light generated from at least one light source; and a projection unit configured to project light emitted from the lighting unit, along a second axis being parallel to the first axis, and wherein directions of the first axis and the second axis are equal. ### Claim 2 (depends on 1) The hand-held scanner of claim 1, wherein the lighting unit comprises a plurality of light sources, a first light source among the plurality of light sources is provided on the first axis, and light sources excluding the first light source among the plurality of light sources are provided in a space generated between the first axis and the second axis. ### Claim 3 (depends on 1) The hand-held scanner of claim 1, wherein the lighting unit comprises: a plurality of light sources comprising a first light source configured to emit first light, a second light source configured to emit second light, and a third light source configured to emit third light; a first filter configured to change a path of the second light to the first axis by passing the first light and reflecting the second light; and a second filter configured to change a path of the third light to the first axis by passing the first light and the second light and reflecting the third light. ### Claim 4 (depends on 1) The hand-held scanner of claim 1, wherein the lighting unit further comprises: a light equalizing unit configured to allow light generated from the at least one light source to have a uniform distribution on a surface to which the light is emitted; and a relay unit configured to relay light output from the light equalizing unit to a prism unit. ### Claim 5 (depends on 4) The hand-held scanner of claim 4, wherein the relay unit comprises a relay lens and a mirror which are configured to focus light output from the light equalizing unit to a light modulator, the relay lens is perpendicular to an optical axis, and the mirror is provided with a preset angle with respect to the first axis. ### Claim 6 (depends on 5) The hand-held scanner of claim 5, wherein the relay lens is provided in plural, and at least one of the relay lens is a negative lens. ### Claim 7 (depends on 5) The hand-held scanner of claim 5, wherein the preset angle is in a range between 30 degrees and 60 degrees. ### Claim 8 (depends on 4) The hand-held scanner of claim 4, wherein the prism unit comprises: a first prism via which an angle of light received from the lighting unit is changed and relayed to a light modulator; and a second prism via which light received from the first prism is relayed to the light modulator, and light reflected from the light modulator is relayed to the projection unit. ### Claim 9 (depends on 8) The hand-held scanner of claim 8, wherein the first prism has a vertex angle with a preset angle. ### Claim 10 (depends on 9) The hand-held scanner of claim 9, wherein the preset angle is in a range between 10 degrees and 25 degrees. ### Claim 11 (depends on 9) The hand-held scanner of claim 9, wherein a refracting angle with respect to a first region comprising the vertex angle of the first prism is different from a refracting angle with respect to a second region not comprising the first region. ### Claim 12 (depends on 9) The hand-held scanner of claim 9, wherein a material capable of absorbing the light is coated on a region of the first prism which comprises the vertex angle. ### Claim 13 (depends on 1) The hand-held scanner of claim 1, wherein the optical engine further comprises a light modulator comprising a digital micro-mirror device (DMD) configured to generate reflected light by reflecting the light being incident with a preset angle via the prism unit. ### Claim 14 (depends on 1) The hand-held scanner of claim 1, wherein the hand-held scanner further comprises a reflective member configured to reflect and emit transmitted light to an object, the transmitted light being transmitted along the second axis, and an optical axis of the reflective member is perpendicular to the second axis. ### Claim 15 (depends on 14) The hand-held scanner of claim 14, wherein the hand-held scanner further comprises a tip case that can be inserted into and withdrawn from an oral cavity, and the tip case has an opening being open in a preset direction, and the reflective member being adjacent to the opening.