# US 2017/0282597 A1 · Light illuminating apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2017/0282597 A1 - Document ID: US20170282597A1 - Status: Published application - Kind: A1 - Application number: 15/458,530 - Filed: 2017-03-14 - Published: 2017-10-05 - Earliest claimed: 2016-03-30 - Assignees: Hoya Candeo Optronics Corporation - Applicants: Hoya Candeo Optronics Corporation - Inventors: Kazutaka SHITO - Web page: https://patentgrep.com/patent/US20170282597A1 ## CPC - B41J 2/45: using light-emitting diode {[LED] or laser} arrays - B41J 11/00214: {using UV radiation} - F21V 5/007: {Array of lenses or refractors for a cluster of light sources, e.g. for arrangement of multiple light sources in one plane (combination of two or more refractors F21V5/008)} - G02B 19/0014: {at least one surface having optical power} - G02B 19/0066: {in the form of an LED array} - G02B 19/0095: {for use with ultraviolet radiation} - G02B 27/0905: {Dividing and/or superposing multiple light beams} - G02B 27/0911: {Anamorphotic systems} - G02B 27/0927: {Systems for changing the beam intensity distribution, e.g. Gaussian to top-hat} - G02B 27/0955: {Lenses (lenses per se G02B3/00)} - B41J: TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS - F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS ## Abstract Provided is a light illuminating apparatus for irradiating light of a line shape extending in a first direction and having a line width in a second direction. The light illuminating apparatus includes light emitting units, each including a substrate, light sources arranged at an interval along the first direction on the substrate and placed such that a direction of an optical axis is matched to a direction perpendicular to the substrate surface, and optical devices placed on optical paths of each light source to shape light from each light source into light with a predetermined divergence angle, wherein the light emitting units are arranged on an arc having its center at the irradiation position when viewed in the first direction, and an irradiation width in the second direction of light from the light emitting units is approximately equal within a preset range in a direction perpendicular to the irradiation surface. ## Claims ### Claim 1 A light illuminating apparatus for irradiating, to a preset irradiation position on a reference irradiation surface, light of a line shape extending in a first direction and having a preset line width in a second direction perpendicular to the first direction, the light illuminating apparatus comprising: a plurality of light emitting units, each comprising a substrate, a plurality of light sources arranged at a preset interval along the first direction on the substrate and placed such that a direction of an optical axis is matched to a direction perpendicular to the substrate surface, and a plurality of optical devices placed on optical paths of each of the light sources to shape light from each of the light sources into light with a preset divergence angle, wherein the plurality of light emitting units is arranged on an arc having its center at the irradiation position, when viewed in the first direction, and an irradiation width in the second direction of light emitted from the plurality of light emitting units is approximately equal within a preset range in a direction perpendicular to the irradiation surface. ### Claim 2 (depends on 1) The light illuminating apparatus according to claim 1, wherein the irradiation width is wider than the preset line width. ### Claim 3 (depends on 1) The light illuminating apparatus according to claim 1, wherein irradiation intensity distributions in the second direction of light emitted from each of the light emitting units are approximately normal. ### Claim 4 (depends on 1) The light illuminating apparatus according to claim 1, wherein irradiation intensity distributions of light emitted from each of the light emitting units overlap with each other within the preset range. ### Claim 5 (depends on 1) The light illuminating apparatus according to claim 1, wherein when an optical path length of light emitted from each of the light emitting units is a, and the irradiation width is b, an effective diameter of each of the optical devices is c, and the divergence angle is ±0, the following conditional expression (1) is satisfied: tan θ=(b−c)/2a (1) ### Claim 6 (depends on 1) The light illuminating apparatus according to claim 1, wherein the divergence angle is in a range of ±10° to ±40°. ### Claim 7 (depends on 1) The light illuminating apparatus according claim 1, wherein the plurality of light emitting units is arranged in line symmetry with a perpendicular line at the irradiation position as a symmetry axis, when viewed in the first direction. ### Claim 8 (depends on 1) The light illuminating apparatus according to claim 1, wherein the light is light of a wavelength that acts on an ultraviolet curable resin. ### Claim 9 (depends on 2) The light illuminating apparatus according to claim 2, wherein irradiation intensity distributions in the second direction of light emitted from each of the light emitting units are approximately normal. ### Claim 10 (depends on 2) The light illuminating apparatus according to claim 2, wherein irradiation intensity distributions of light emitted from each of the light emitting units overlap with each other within the preset range. ### Claim 11 (depends on 3) The light illuminating apparatus according to claim 3, wherein irradiation intensity distributions of light emitted from each of the light emitting units overlap with each other within the preset range. ### Claim 12 (depends on 9) The light illuminating apparatus according to claim 9, wherein irradiation intensity distributions of light emitted from each of the light emitting units overlap with each other within the preset range. ### Claim 13 (depends on 2) The light illuminating apparatus according to claim 2, wherein when an optical path length of light emitted from each of the light emitting units is a, and the irradiation width is b, an effective diameter of each of the optical devices is c, and the divergence angle is ±θ, the following conditional expression (1) is satisfied: tan θ=(b−c)/2a (1) ### Claim 14 (depends on 3) The light illuminating apparatus according to claim 3, wherein when an optical path length of light emitted from each of the light emitting units is a, and the irradiation width is b, an effective diameter of each of the optical devices is c, and the divergence angle is ±θ, the following conditional expression (1) is satisfied: tan θ=(b−c)/2a (1) ### Claim 15 (depends on 4) The light illuminating apparatus according to claim 4, wherein when an optical path length of light emitted from each of the light emitting units is a, and the irradiation width is b, an effective diameter of each of the optical devices is c, and the divergence angle is ±θ, the following conditional expression (1) is satisfied: tan θ=(b−c)/2a (1) ### Claim 16 (depends on 9) The light illuminating apparatus according to claim 9, wherein when an optical path length of light emitted from each of the light emitting units is a, and the irradiation width is b, an effective diameter of each of the optical devices is c, and the divergence angle is ±θ, the following conditional expression (1) is satisfied: tan θ=(b−c)/2a (1) ### Claim 17 (depends on 10) The light illuminating apparatus according to claim 10, wherein when an optical path length of light emitted from each of the light emitting units is a, and the irradiation width is b, an effective diameter of each of the optical devices is c, and the divergence angle is ±θ, the following conditional expression (1) is satisfied: tan θ=(b−c)/2a (1) ### Claim 18 (depends on 11) The light illuminating apparatus according to claim 11, wherein when an optical path length of light emitted from each of the light emitting units is a, and the irradiation width is b, an effective diameter of each of the optical devices is c, and the divergence angle is ±θ, the following conditional expression (1) is satisfied: tan θ=(b−c)/2a (1) ### Claim 19 (depends on 12) The light illuminating apparatus according to claim 12, wherein when an optical path length of light emitted from each of the light emitting units is a, and the irradiation width is b, an effective diameter of each of the optical devices is c, and the divergence angle is ±θ, the following conditional expression (1) is satisfied: tan θ=(b−c)/2a (1)