Abstract: There is provided an optical scanner including: a mirror having a reflection surface for reflecting light, and a first back surface positioned at a side opposite to the reflection surface; a permanent magnet disposed at the first back surface of the mirror; a support portion that supports the mirror and has a second back surface positioned at the same side as the first back surface; a shaft portion that couples the mirror and the support portion to each other and enables the mirror to swing around a swing axis; a first member disposed at the second back surface of the support portion; a second member that supports the first member in a cantilever manner in a direction orthogonal to the swing axis and along the second back surface; a third member disposed to face the first member via the second member and coupled to the second member; and an electromagnetic coil disposed between the first member and the third member.

Abstract: The invention relates to an optical element (13) for an emitting unit (8) of an optical acquisition device (3), wherein the optical element (13) comprises a first side (13a) having a reflective first free-form surface (F1) and a second side (13b), which is opposite to the first side (13a), having a refractive second free-form surface (F2). Furthermore, the optical element (13) is designed to transmit a beam bundle (10) incident on the second side (13b) on the optical element (13) at least in large part through the second free-form surface (F2) up to the first free-form surface (F1), to reflect the beam bundle (10) transmitted through the second free-form surface (F2) up to the first free-form surface (F1) at the first free-form surface (F1), and to emit the beam bundle (10) reflected from the first free-form surface (F1) via the second free-form surface (F2).

Abstract: According to the present disclosure, a reading module includes a light source, an optical system, and a sensor. The optical system images, as image light, reflection light of light with which the light source has irradiated a document. The sensor converts the thus imaged image light into an electric signal. The optical system includes a mirror array in which a plurality of reflection mirrors are connected together, and a plurality of aperture stop portions. The reflection mirrors each reflect light at an angle that is different, as seen in a main scanning direction, from an angle at which an adjacent one of the reflection mirrors reflects light. The plurality of aperture stop portions are disposed on one side of the mirror array with respect to an orthogonal direction which is orthogonal to the main scanning direction.

Abstract: An F-? lens for laser engraving includes a first lens (L1), a second lens (L2), a third lens (L3), and a fourth lens (L4), which are coaxially arranged along a transmission direction of incident light; wherein the first lens (L1) is a meniscus lens, the second lens (L2) is a meniscus lens, the third lens (L3) is a plano-convex lens, and the fourth lens (L4) is a flat lens; wherein the first lens (L1) has a first surface (S1) and a second surface (S2), the second lens (L2) has a third surface (S3) and a fourth surface (S4), the third lens (L3) has a fifth surface (S5) and a sixth surface (S6), and the fourth lens (L4) has a seventh surface (S7) and an eighth surface (S8); the first surface (S1) to the eighth surface (S8) are sequentially arranged along the transmission direction of the incident light; wherein radii of curvature of the first surface (S1) to the eighth surface (S8) are ?29 mm, ?88 mm, ?56 mm, ?36 mm, ?, ?116 mm, ?, and ?, respectively; and center thicknesses (d1, d2, d3, d4) of the first lens (L

Abstract: An elongated laser beam optical assembly. The assembly has a laser light source that produces a laser beam. A cylindrical anamorphic lens has a planar surface at a first end and an anamorphic surface at a second end thereof, the first end receiving the laser beam from the laser light source and producing an output laser beam from the second end thereof. An aperture passes the output laser beam from the second end of the anamorphic lens to produce an elongated laser beam.

Abstract: A camera assembly for generating a high resolution image of an area of interest on a workpiece includes a sensor array and an optical lens that focuses light reflected from the workpiece onto the sensor array. The sensor array is inclined relative to an optical axis defined by the optical lens disposed in a fixed position relative to the optical lens. A galvanometer driven mirror assembly directs a field of view of the optical lens toward the area of interest on the workpiece translating light reflected from the area of interest of the workpiece onto the sensor array. The inclination of the sensor array provides varying degrees of resolution relative to a distance of the workpiece area of interest from the camera assembly enabling the camera assembly to generate high resolution images at varying distances from the camera assembly without adjusting the optical lens relative to the sensor array.

Abstract: Surface measurement data just provides the coordinates of an object surface without giving various parameters like the radius of curvature, conic constant, and deformation coefficients. In this paper, we propose a novel method for extracting the important parameters for the determination of unknown aspheric surface equations from the measurement of aspheric surfaces. The largest error between the original surface and the reconstructed surface in the theoretical case is shown to be about 8.6 nm. This fact implies that the new method is well suited for the reconstruction of unknown surface equations.

Abstract: Disclosed is a diffraction microscopy capable of reducing influence of an increase in the incident angle range of a beam. Specifically disclosed is a diffraction microscopy in which a beam is incident on a sample, in which the intensity of a diffraction pattern from the sample is measured, and in which an image of an object is rebuilt using Fourier interactive phase retrieval on the basis of the measured intensity of the diffraction pattern. In this method, Fourier interactive phase retrieval is performed using deconvolution on the diffraction pattern subjected to convolution by the increase in the incident angle range of the beam.

Abstract: An anamorphic optical element and an adjustment mechanism for selectively rotating the optical element either around an axis substantially in a vertical direction, an axis substantially in an optical axis direction, an axis substantially in a plane formed by the vertical direction and the optical axis direction, or combination of axes thereof is used to vary a vertical separation between two or more spots.

Abstract: An image reading optical system, including: an imaging optical system used for imaging a slit area of a document and includes an optical element having different cross section shapes in a main scanning direction and in a sub-scanning direction; an aperture stop; and an optical phase changing filter disposed adjacent to the aperture stop and including a phase lead area and a phase delay area, in which the optical phase changing filter includes a surface shape component that is symmetric only with respect to a predetermined plane including a surface normal at the center of the incident beam and one of the main scanning direction and the sub-scanning direction, and with respect to a surface that includes the surface normal at the center of the incident beam and is perpendicular to the predetermined plane, one side is the phase lead area, and another side is the phase delay area.

Abstract: An oscillating mirror module as a deflecting unit is disposed so that a movable mirror faces a plane where image carriers are arranged. A plurality of light source units are disposed within a plane parallel to the plane where the image carriers are arranged so that main light fluxes of light beams emitted from the light sources form predetermined angles with each other. The oscillating mirror module includes an incidence mirror that bends a plurality of light beams emitted from the light source units to direct the light beams to the movable mirror, and a separation mirror that separates the light beams scanned by the movable mirror into two opposite directions with respect to a cross-section including a surface normal of the movable mirror and perpendicular to the rotation axis of the movable mirror. A light collecting unit collects light beams so that output optical axes of the light beams corresponding to the light source units intersect on a surface of the movable mirror of the deflecting unit.

Abstract: 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.

Abstract: An optical scanning device includes at least one laser light source for emitting a laser light; a deflection section for deflecting and scanning the laser light emitted from the at least one laser light source; and a light guide plate of which a side surface is irradiated with the laser light deflected and scanned by the deflection section. The at least one laser light source includes a multi-mode fiber light source, or a broad-stripe semiconductor laser light source arranged such that a vertical direction of a stripe structure is parallel to a scanning direction. An exit pupil in a thickness direction, which is perpendicular to the scanning direction, is formed at least in one area on the side surface of the light guide plate.

Abstract: Optical pattern generators use rotating reflective axicon segments to produce images that can have different dimensions along the pattern direction compared to the cross pattern direction. Examples include both single axicon pattern generators and dual axicon pattern generators that independently control the image space relative aperture and thereby control the image dimensions in two orthogonal directions.

Abstract: A scanning optical apparatus includes: an incident optical system which is disposed in an optical path between a light source unit and a deflection unit, and includes an optical element for making a light flux emitted from the light source unit enter a deflection surface of the deflection unit with an oblique angle in a sub scanning section; and a positional regulation member for holding the optical element having an x reference surface for performing positional regulation of the optical element in an optical axis direction and a z reference surface for performing positional regulation of the optical element in a sub scanning direction. The optical element is held by a casing so that the x reference surface and the z reference surface contact with the positional regulation member of the casing. The principal ray of the light flux outgoing from the optical element satisfies a conditional equation (1).

Abstract: A scanning optical apparatus includes a light source, a deflecting element for deflecting a beam of light emitted from the light source, an optical device for causing the beam of light emitted from the light source to be imaged into a linear shape long in the main scanning direction on the deflecting surface of the deflecting element. The optical device is comprised of a first optical element and a second optical element, and a third optical element for causing the beam of light deflected by the deflecting element to be imaged into a spot-like shape on a surface to be scanned. The third optical element includes a single lens, the opposite lens surfaces of which both include a toric surface of an aspherical surface shape in the main scanning plane, the curvatures of the opposite lens surfaces in the sub scanning plane being continuously varied from the on-axis toward the off-axis in the effective portion of the lens.

Abstract: An optical scanning device includes an input optical system having an input optical element, for projecting a light beam from a light source device onto a deflecting surface of an optical deflector, and an imaging optical system having an imaging optical element, for imaging the light beam scanningly deflected by the deflecting surface of the optical deflector, on a surface to be scanned, wherein the light beam is obliquely incident on the deflecting surface in a sub-scan section, wherein the imaging optical element has at least one optical surface which is decentered in the sub-scan section, wherein the input optical element has at least one optical surface having an asymmetric and aspherical surface shape, wherein the input optical element has a thickness dm1 in the sub-scan section and at a position where a first marginal light ray of the light beam passing through the input optical system, which first marginal light ray is closer to an optical reference axis than the principal ray of that light beam is, p

Abstract: A scanning optical apparatus includes a light source, a deflecting element for deflecting a beam of light emitted from the light source, an optical device for causing the beam of light emitted from the light source to be imaged into a linear shape long in the main scanning direction on the deflecting surface of the deflecting element. The optical device is comprised of a first optical element and a second optical element, and a third optical element for causing the beam of light deflected by the deflecting element to be imaged into a spot-like shape on a surface to be scanned. The third optical element includes a single lens, the opposite lens surfaces of which both include a toric surface of an aspherical surface shape in the main scanning plane, the curvatures of the opposite lens surfaces in the sub scanning plane being continuously varied from the on-axis toward the off-axis in the effective portion of the lens.

Abstract: Provided is an image reading lens to be used for reading image information of an original. The image reading lens includes an anamorphic lens having at least one anamorphic surface with an aspherical shape which is rotationally asymmetric about an optical axis. The anamorphic lens has a non-arc shape in each of a main scanning section and a sub scanning section. The at least one anamorphic surface has a positive optical power in a main scanning direction on the optical axis, and a non-arc amount of the sub scanning section continuously changes with an increase in distance from the optical axis in the main scanning direction.

Abstract: An imaging lens good in mass-productivity, compact, low in manufacturing cost, good in aberration performance is provided by effectively correcting aberrations without greatly varying the variation of the thickness of a curing resin. An imaging device having such an imaging lens and a portable terminal are also provided. A third lens (L3) has a flat surface on the object side, a convex surface near the optical axis on the image side, and a concave aspheric surface around the peripheral portion within the region where a light beam passes. Therefore, it is possible to reduce the other optical aberrations such as distortion and simultaneously to design the imaging lens so that the astigmatism takes on a maximum value at the outermost portion. Hence, the resolutions at low to middle image heights are high. In addition, such a shape does not cause a large variation of the thickness of the third lens (L3) from the region along the axis to the periphery.

Abstract: A scanning optical apparatus includes a light source, a deflecting element for deflecting a beam of light emitted from the light source, an optical device for causing the beam of light emitted from the light source to be imaged into a linear shape long in the main scanning direction on the deflecting surface of the deflecting element. The optical device is comprised of a first optical element and a second optical element, and a third optical element for causing the beam of light deflected by the deflecting element to be imaged into a spot-like shape on a surface to be scanned. The third optical element includes a single lens, the opposite lens surfaces of which both include a toric surface of an aspherical surface shape in the main scanning plane, the curvatures of the opposite lens surfaces in the sub scanning plane being continuously varied from the on-axis toward the off-axis in the effective portion of the lens.

Abstract: Disclosed is a projection image display apparatus to display an image by projecting a light from a light source to a screen including a scan mirror to scan the light from the light source by vibrating in a sine vibration manner at least in an one-dimensional direction and a correction lens which is disposed between the scan mirror and the screen and which corrects a deflection angle of the light scanned by the scan mirror at least in the one-dimensional direction, and the correction lens carries out a correction so that the larger a scan angle of the scan mirror is, the larger the deflection angle is to be by the correction.

Abstract: An imaging lens good in mass-productivity, compact, low in manufacturing cost, good in aberration performance is provided by effectively correcting aberrations without greatly varying the variation of the thickness of a curing resin. An imaging device having such an imaging lens and a portable terminal are also provided. A third lens (L3) has a flat surface on the object side, a convex surface near the optical axis on the image side, and a concave aspheric surface around the peripheral portion within the region where a light beam passes. Therefore, it is possible to reduce the other optical aberrations such as distortion and simultaneously to design the imaging lens so that the astigmatism takes on a maximum value at the outermost portion. Hence, the resolutions at low to middle image heights are high. In addition, such a shape does not cause a large variation of the thickness of the third lens (L3) from the region along the axis to the periphery.

Abstract: An optical scanning device capable of stably and uniformly performing linear optical scanning by using a high-brightness light source is provided. The device includes: at least one laser light source (11) for emitting a laser light; a deflection section (15) for deflecting and scanning the laser light emitted from the at least one laser light source (11); and a light guide plate (17) of which a side surface is irradiated with the laser light deflected and scanned by the deflection section (15). The at least one laser light source (11) includes a multi-mode fiber light source, or a broad-stripe semiconductor laser light source arranged such that a vertical direction of a stripe structure is parallel to a scanning direction. An exit pupil in a thickness direction, which is perpendicular to the scanning direction, is formed at least in one area on the side surface of the light guide plate (17).

Abstract: An illumination light source uses a beam to scan while a relatively small mirror, such as an MEMS mirror, is oscillated at or in the vicinity of the resonance frequency. In this instance, the scan angle is corrected with the use of a correction optical system for uniform illumination to be achieved.

Abstract: An illuminator (10) for producing a radiation spot (120) on a workpiece (110) comprises a laser light source (20) and a beam-shearing optical system (30). Fine structure (160) generated by an integrator (80) of laser light source (20) in integrated beams (90) as a result of path length differences among coherent light beams (70) from emitters (60) of lasers (40) is sheared by the inclusion of beam-shearing optical system (30) into illuminator (10). Beam-shearing optical system (30) allows illuminator (10) to produce a radiation spot (120) in which the fine structure (160) is spread so that scanning of radiation spot (120) does not produce the striations (140) in scanned patch (170) that are obtained with prior art illuminators.

Abstract: An optical scanning apparatus includes a light-source unit, an incident optical system for directing light beams emitted from the light-source unit to a deflecting unit, and an imaging optical system for guiding the light beams deflected from the deflecting unit to a surface to be scanned. The imaging optical system includes a toric lens whose power in the main scanning direction is different from that in the sub-scanning direction; the toric lens having the curvature centers of the meridians of a first toric surface connected to form a curved line located in a common plane Ha, and the curvature centers of the meridians of a second toric surface connected to form a curved line not located in a common plane.

Abstract: An optical scanning device includes a light deflector that deflects light beams from a light source device and an optical scanning optical system that focuses the light beams deflected by the light deflector on a surface to be scanned, wherein the light beams are made incident on a deflective reflection surface of the light deflector at an angle in a sub-scanning direction with respect to a normal of the deflective reflection surface. The optical scanning optical system has at least one scanning focus lens, and at least one lens surface of the scanning focus lens is a surface, curvature in the sub-scanning direction of which changes according to an image height, and is a surface, curvature in the sub-scanning direction of which on a reference axis of the lens is zero or substantially zero, in order to effectively correct a scanning line curve and deterioration in a wavefront aberration.

Abstract: A scanning optical system includes converges, with a single lens, a divergent luminous flux, which is deflected in a main scanning direction by an optical deflector, on a surface of a scan target. The lens has two surfaces in a biconvex shape in both the main scanning direction and a sub-scanning direction, and at least one of the surfaces is a toric surface in which a line that connects, on a cross section in the main scanning direction, centers of curvature in a cross section in the sub-scanning direction is nonlinear, and change of the curvature of the toric surface in the cross section in the sub-scanning direction along the main scanning direction is asymmetric with an optical axis of the lens. The surfaces are anamorphic surfaces.

Abstract: A method and imaging system (10) is disclosed having a lens assembly (40) adapted for reading a target object (18) comprising an anamorphic lens assembly with first (L3) and second (L4) toroidal lenses adapted for positioning between a target object (18) and a sensor array (32) of an imaging system (10) such that an image received from the target object (18) is anamorphically magnified before impinging onto the sensor array along first and second directions by the anamorphic lens assembly (L3, L4). The anamorphic magnification in the first direction differs from the magnification in the second direction such that the image of the target object (18) projected onto the sensor array (32) appears elongated along the first direction relative to the second direction.