Class / Patent application number | Description | Number of patent applications / Date published |
359206100 | High distortion lens (e.g., f-Theta lens) | 23 |
20090244671 | Single F-Theta Lens Used For Micro-Electro Mechanical System (MEMS) Laser Scanning Unit - A single f-θ lens used for a micro-electro mechanical system (MEMS) laser scanning unit is in a meniscus shape formed by the lens in which a concave surface faces towards the side of a MEMS reflecting mirror. The single f-θ lens has a first optical surface and a second optical surface, at least one optical surface is aspherical surface in both main scanning direction and sub scanning direction, and satisfies specifical optical conditions. The single f-θ lens converts the nonlinear relationship between scanned angle and the time into the linear relationship between the imaged spot distances and the time. Meanwhile, the single f-θ lens focuses the scan light to the target in the main scanning and sub scanning directions, such that the purpose of the scanning linearity effect and the high resolution scanning can be achieved. | 10-01-2009 |
20090244672 | Two-Element F-Theta Lens Used For Micro-Electro Mechanical System (MEMS) Laser Scanning Unit - A two-element f-θ lens used for a micro-electro mechanical system (MEMS) laser scanning unit includes a first lens and a second lens, both in a meniscus shape having a concave surface facing the side of the MEMS reflecting mirror. The two-element f-θ lens comprising a first lens with a first optical surface and a second optical surface and a second lens with a third optical surface and a fourth optical surface, both in a meniscus shape and having a concave surface on the side of the MEMS reflecting mirror; at least one optical surface is aspherical surface in both main scanning direction and sub scanning direction, and satisfies specifical optical conditions. The two-element f-θ lens corrects the nonlinear relationship between scanned angle and the time into the linear relationship between the image spot distances and the time. Meanwhile, the two-element f-θ lens focuses the scan light to the target in the main scanning and sun scanning directions, such that the purpose of the scanning linearity effect and the high resolution scanning can be achieved. | 10-01-2009 |
20100033792 | TWO-ELEMENT F-THETA LENS USED FOR MICRO-ELECTRO MECHANICAL SYSTEM (MEMS) LASER SCANNING UNIT - A two-element f-θ lens used for a micro-electro mechanical system (MEMS) laser scanning unit includes a first lens and a second lens, the first lens is a positive power meniscus lens of which concave surface is disposed on a side of a MEMS mirror, the second lens is a negative power meniscus lens of which convex surface is disposed on the side of the MEMS mirror, at least one optical surface is an Aspherical surface in both main scanning direction and sub scanning direction, and satisfies special optical conditions. The two-element f-θ lens corrects the nonlinear relationship between scanned angle and time into the linear relationship between the image spot distances and time. Meanwhile, the two-element f-θ lens focuses the scan light to the target in the main scanning and sun scanning directions, such that the purpose of the scanning linearity effect and the high resolution scanning can be achieved. | 02-11-2010 |
20100033793 | TWO-ELEMENT F-THETA LENS USED FOR MICRO-ELECTRO MECHANICAL SYSTEM (MEMS) LASER SCANNING UNIT - A two-element f-θ lens used for a micro-electro mechanical system (MEMS) laser scanning unit includes a first lens and a second lens, the first lens is a positive refraction meniscus lens of which the convex surface is disposed on a side of a MEMS mirror, the second lens is a positive refraction meniscus lens of which the concave surface is disposed on the side of the MEMS mirror, at least one optical surface is an Aspherical surface in both main scanning direction and sub scanning direction, and satisfies special optical conditions. The two-element f-θ lens corrects the nonlinear relationship between scanned angle and time into the linear relationship between image spot distances and time. The two-element f-θ lens focuses the scan light to the target in the main scanning and sun scanning directions, such that the purpose of the scanning linearity effect and the high resolution scanning can be achieved. | 02-11-2010 |
20100033794 | TWO-ELEMENT F-THETA LENS USED FOR MICRO-ELECTRO MECHANICAL SYSTEM (MEMS) LASER SCANNING UNIT - A two-element f-θ lens used for a micro-electro mechanical system (MEMS) laser scanning unit includes a first lens and a second lens, the first lens is a biconvex lens, the second lens is a meniscus lens of which the convex surface is disposed on a side of a MEMS mirror, at least one optical surface is an Aspherical surface in both main scanning direction and sub scanning direction, and satisfies special optical conditions. The two-element f-θ lens corrects the nonlinear relationship between scanned angle and the time into the linear relationship between the image spot distances and the time. Meanwhile, the two-element f-θ lens focuses the scan light to the target in the main scanning and sun scanning directions, such that the purpose of the scanning linearity effect and the high resolution scanning can be achieved. | 02-11-2010 |
20100033795 | TWO-ELEMENT F-THETA LENS USED FOR MICRO-ELECTRO MECHANICAL SYSTEM (MEMS) LASER SCANNING UNIT - A two-element f-θ lens used for a micro-electro mechanical system (MEMS) laser scanning unit includes a first lens and a second lens, the first lens is a meniscus lens of which the concave surface is disposed on a side of a MEMS mirror, the second lens is a biconcave lens, at least one optical surface is an Aspherical surface in both main scanning direction and sub scanning direction, and satisfies special optical conditions. The two-element f-θ lens corrects the nonlinear relationship between scanned angle and the time into the linear relationship between the image spot distances and the time. Meanwhile, the two-element f-θ lens focuses the scan light to the target in the main scanning and sun scanning directions, such that the purpose of the scanning linearity effect and the high resolution scanning can be achieved. | 02-11-2010 |
20100046057 | Micro electronic mechanical system oscillating laser scanning unit - A MEMS oscillating laser scanning unit (LSU) composed of a MEMS Control Module, a Pre-scan Module and a Post-scan Module is disclosed. The MEMS Control Module consists of a laser source and a MEMS oscillating mirror. The laser source and the MEMS oscillating mirror both are aligned with the same side, opposite to target surface so that laser beam emits from the side of the target surface, reverses by a reflection mirror of the Pre-scan Module and then moves along a plane formed by a central axis as well as an oscillatory rotary axis of the MEMS oscillating mirror, enters center of the MEMS oscillatory mirror. Thus, scanning spots on the target surface are all symmetrical to the central axis. Thus effective area of the MEMS oscillating mirror is reduced and further reduce the cost as well as improve scanning efficiency. Moreover, design of the fθ Lens is simpler and the volume of the LSU is reduced. | 02-25-2010 |
20100067082 | LIGHT SCANNING UNIT AND IMAGE FORMING APPARATUS - Provided are a light scanning unit and an image forming apparatus including the light scanning unit. The light scanning unit can include a source, a deflector, and an optical imaging system. The deflector can deflect the light generated by the source. The optical imaging system can form the deflected light into an image on a photosensitive medium and can have a first and second optical imaging lenses collectively configured: to have the functionality of an f-theta lens. The optical imaging system can be such that a first ratio (k/fm) is between about 0.81 and about 0.88, and a second ratio (fm/fm | 03-18-2010 |
20100073752 | TWO-ELEMENT F-THETA LENS USED FOR MICRO-ELECTRO MECHANICAL SYSTEM (MEMS) LASER SCANNING UNIT - A two-element f-θ lens used for a micro-electro mechanical system (MEMS) laser scanning unit includes a first lens and a second lens, the first lens is a positive refraction meniscus lens of which the convex surface is disposed on a side of a MEMS mirror, the second lens is a positive refraction meniscus lens of which the convex surface is disposed on the side of the MEMS mirror, at least one optical surface is an Aspherical surface in both main scanning direction and sub scanning direction, and satisfies special optical conditions. The two-element f-θ lens corrects the nonlinear relationship between scanned angle and time into the linear relationship between image spot distances and time. The two-element f-θ lens focuses the scan light to the target in the main scanning and sub scanning directions, such that the purpose of the scanning linearity effect and the high resolution scanning can be achieved. | 03-25-2010 |
20100085621 | TWO-ELEMENT F-THETA LENS USED FOR MICRO-ELECTRO MECHANICAL SYSTEM (MEMS) LASER SCANNING UNIT - A two-element f-θ lens used for a micro-electro mechanical system (MEMS) laser scanning unit includes a first lens and a second lens, the first lens is a biconvex lens, the second lens is a meniscus lens of which the concave surface is disposed on a side of a MEMS mirror, at least one optical surface is an Aspherical surface in both main scanning direction and sub scanning direction, and satisfies special optical conditions. The two-element f-θ lens corrects the nonlinear relationship between scanned angle and the time into the linear relationship between the image spot distances and the time. Meanwhile, the two-element f-θ lens focuses the scan light to the target in the main scanning and sun scanning directions, such that the purpose of the scanning linearity effect and the high resolution scanning can be achieved. | 04-08-2010 |
20100118367 | OPTICAL SCANNING APPARATUS AND IMAGE FORMING APPARATUS USING THE SAME - An optical scanning apparatus and an image forming apparatus using the same, overcoming spot rotation due to scanning line curvature and wavefront aberration deterioration, including an incident optical system for guiding beam emitted from a light source to a deflector, and an imaging optical system for forming image of the beam deflected by the deflector on a scanning surface. In sub-scanning section, the beam enters the deflecting surface obliquely to plane perpendicular to a deflector axis. Each of incident and exit surfaces of an imaging optical element is a surface in which a tilt angle of sagittal line changes from on-axis toward off-axis in sub-scanning direction, the tilt angle indicating gradient of normal to sagittal line on meridian line with respect to main scanning section. The incident and exit surfaces each have the same sign for a difference between change rates of axial and off-axial tilt angles of sagittal line. | 05-13-2010 |
20100214638 | METHOD AND APPARATUS FOR THREE-DIMENSIONAL TARGETING USING GALVANO MOTOR SCANNING APPARATUS - This invention relates to a method of three-dimensional targeting, by galvano motor scanning head means using a combination of pre-objective and post-objective scanning techniques whereby a collimated input to collimated output beamexpander ( | 08-26-2010 |
20100245958 | TWO-ELEMENT F(THETA) LENS WITH SHORT FOCAL DISTANCE FOR LASER SCANNING UNIT - A two-element fθ lens with short focal distance for a laser scanning unit comprises a first lens and a second lens. The first lens has first and second optical surfaces, the second lens has third and fourth optical surfaces, and all the optical surfaces in a main scanning direction on the optical axis are aspherical surfaces. The fourth optical surface has an inflection point in SAG counted from the optical axis to peripheral portion and its paraxial portion is convex that is disposed on the polygon mirror side. The two-element fθ lens satisfies an optical condition of: 0.5429≦tan(β)≦1.2799, wherein β is a maximum effective window angle. The first and second lenses of the two-element fθ lens with short focal distance of the invention effectively reduces the distance from the polygon mirror to an imaging surface to achieve the purpose for reducing the volume of the laser scanning unit. | 09-30-2010 |
20110058241 | ULTRA-SHORT PULSE SCANNING OPTICAL SYSTEM - A scanning optical system including an optical source configured to generate an ultra-short light pulse, a dispersion compensation system disposed such that the ultra-short light pulse travels through the dispersion compensation system, an optical deflector configured to rotate about an axis such that the ultra-short light pulse is deflected through a scan angle, and an f-theta scan lens having a group delay (GD) variation versus relative pupil height and group delay dispersion (GDD) variation versus the scan angle that are substantially minimized. The f-theta scan lens is disposed such that the ultra-short pulse is incident on the f-theta scan lens. | 03-10-2011 |
20110157669 | LIGHT SOURCE APPARATUS AND OPTICAL SCANNER - A light source apparatus includes a semiconductor laser which emits a laser beam, a coupling lens which converts the laser beam emitted from the semiconductor laser into a light flux, and a cylindrical lens into which the light flux is allowed to come from the coupling lens. The cylindrical lens is integrally formed with a lens portion, an outer circumferential portion which is arranged at an outer circumference of the lens portion, and a support portion which extends from the outer circumferential portion toward the semiconductor laser and which supports the coupling lens. | 06-30-2011 |
20110317234 | SCANNING OPTICAL APPARATUS - In a scanning optical apparatus including a single lens configured to convert a beam deflected by a polygon mirror into a spot-like image on a scanned surface, an angle β | 12-29-2011 |
20120033281 | OPTICAL SCANNER AND IMAGE-FORMING DEVICE - An scanning unit scanner includes a light source and a polygon mirror unit. A front-to-rear rib is disposed between the light source and the polygon mirror unit and near the polygon mirror unit. An input side opening having a slit shape is formed as a cutout in the top edge of the front-to-rear rib. When laser light from the light source passes through the input side opening, the input side opening restricts the width of the light in a main scanning direction. | 02-09-2012 |
20130070324 | PLASTIC OPTICAL ELEMENT AND OPTICAL SCANNER AND IMAGING FORMING DEVICE INCLUDING THE SAME - A plastic optical element for an optical system of an optical scanner includes a plurality of optical effective portions through which a plurality of light beams transmit, respectively, formed on at least one of an incidence surface and an exit surface in a sub scan direction, and an optical ineffective portion formed between neighboring optical effective portions not to allow the light beams to transmit therethrough, and including an area in which a local contraction occurs at a time of resin molding. | 03-21-2013 |
20140071509 | SCANNING OPTICAL APPARATUS AND IMAGE FORMING APPARATUS - In a scanning optical apparatus including a single lens configured to convert a beam deflected by a polygon mirror into a spot-like image on a to-be-scanned surface, the lens satisfies the conditions: −0.59<β1≦0, −0.46<β2≦0.2, −0.6≦D1<0.43, and −0.17≦D2≦0.16 where β1 indicates an angle [deg] formed in a main scanning plane between a first optical axis and a reference line perpendicular to the to-be-scanned surface, β2 indicates an angle [deg] formed in the main scanning plane between the first optical axis and a second optical axis, D1 indicates an amount of shift [mm] in the main scanning plane, of a point of intersection between the first optical axis and an incident-side lens surface, from the reference line, and D2 indicates an amount of shift [mm] in the main scanning plane, of a point of intersection between the second optical axis and an exit-side lens surface, from the first optical axis. | 03-13-2014 |
20140160546 | SCANNING OPTICAL APPARATUS - In a scanning optical apparatus, an illumination optical system has a diffractive power φdM and a refractive power φnM in a main scanning direction, and a ratio φnM/φdM in the main scanning direction for a focal length fi in a range of 10-22 mm satisfies: g2(fi)≦φnM/φdM≦g1(fi), where A(Z)=(1.897×10 | 06-12-2014 |
20140160547 | SCANNING LENS AND OPTICAL SCANNER - A scanning lens molded of resin includes: a lens portion having an elongate shape extending in a main scanning direction and having first and second longitudinal ends located opposite to and away from each other in the main scanning direction; and a flange portion extending outward in the main scanning direction from the first longitudinal end of the lens portion. The scanning lens has first and second sides located opposite to and away from each other in a sub-scanning direction, and a first protrusion is provided on the first side to protrude outward in the sub-scanning direction. The flange portion protrudes farther beyond the first longitudinal end in an optical axis direction of the lens portion. As viewed from the sub-scanning direction, the first protrusion is located at a position overlapping an interface between the lens portion and the flange portion. | 06-12-2014 |
20140253995 | INJECTION MOLD, OPTICAL COMPONENT, OPTICAL SCANNING DEVICE, AND IMAGE FORMING APPARATUS - There is provided an injection mold for molding an optical component including an optical surface, a non-optical surface separated from the optical surface, and a rib provided to an edge portion of the optical surface, and longer in a direction parallel to the optical surface than in a direction perpendicular to the optical surface. The mold includes a transfer piece including a transfer surface that molds the optical surface and a movable cavity piece including a non-transfer surface that molds at least a portion of the non-optical surface. The transfer surface and the non-transfer surface define a cavity to be filled with resin. The movable cavity piece is moved away from the resin during a process of cooling the resin. At least a portion of the non-transfer surface is located closer to the rib than a boundary between the transfer surface and the rib. | 09-11-2014 |
20150062680 | SYSTEM AND METHOD FOR SCANNING A BEAM OF ULTRA-SHORT PULSE LIGHT - An embodiment of a scanning optical system comprises: an optical source providing a beam of pulsed light of ultra-short pulse duration; a deflector for deflecting the beam through a scan angle; a lens system including a focusing objective for focusing the deflected beam; a dispersion compensating device for reducing dispersion-related distortion of a pulse of the beam by the lens system, the dispersion compensating device including a deformable, dispersive mirror and an actuator device for the mirror; and a controller for controlling the actuator device to change a shape of the mirror in accordance with the scan angle. | 03-05-2015 |