Abstract: Optical coherence tomography (OCT) imaging systems are provided including a source of broadband optical radiation coupled to a sample arm of the OCT imaging system; a beam shaping optical assembly in the sample arm, the beam shaping optical assembly being configured to receive optical radiation from the source as a beam of optical radiation and to shape the spatial profile of the beam of optical radiation; a scan mirror assembly coupled to the beam shaping optical assembly; and objective lens assembly coupled to the beam shaping optical assembly. The beam shaping optical assembly includes a lens assembly configured to change a NA of the OCT system without changing a focus; to change a focus of the OCT system without changing a NA of the system; or to change both the NA and the focus of the OCT system responsive to a control input.

Abstract: An integrated optical assembly is provided, with enhancements that are particularly useful when the integrated optical assembly forms part of a laser radar system. The integrated optical assembly produces a reference beam that is related to the optical characteristics of a scanning reflector, or to changes in position or orientation of the scanning reflector relative to a source. Thus, if the scanning reflector orientation were to shift from its intended orientation (due e.g. to thermal expansion) or if characteristics of the scanning reflector (e.g. the index of refraction of the scanning reflector) were to change on account of temperature changes, the reference beam can be used to provide data that can be used to account for such changes. In addition, if the scanning reflector were to be positioned in an orientation other than the orientation desired, the reference beam can be used in identifying and correcting that positioning.

Abstract: A plastic optical element for focusing light to a target includes a first lens and a second lens. The first lens includes an incident surface, a projection surface opposite the incident surface, and a non-optical surface through which light does not pass and that includes a non-transfer portion. At least one light beam passes from the incident surface to the projection surface. The second lens includes an incident surface, a projection surface opposite the incident surface, and a non-optical surface through which light does not pass and that includes a non-transfer portion disposed opposite the non-optical surface of the first lens. At least one light beam passes from the incident surface to the projection surface. The non-transfer portions of the first lens and the second lens are portions on which no surface is transferred from a surface of a mold used to form the plastic optical element.

Abstract: An optical scanning apparatus capable of fixing an optical member using a plate spring without forming a die cut hole and thus having high dust-proof performance includes a mirror supporting portion supporting a reflection mirror, and a projecting portion configured to form a gap between the reflection mirror supported on the mirror supporting portion and itself, and to deform the plate spring with the reflection mirror, and the projecting portion is provided with a cut hole for engaging the plate spring.

Abstract: A beam brush includes one lens fixed for receiving a laser beam propagating along a first beam axis, a retroreflector positioned for redirecting the laser beam onto a second beam axis through a change in beam path length, and a second lens transmitting the redirected beam. The retroreflector is rotatable about an offset axis and has its angle of rotation controlled for affecting a change in beam path length. The angle of rotation resulting in the path length change is selected for providing a focus or divergence of the reflected beam transmitted through the second lens. Such a system is useful as a Z-axis focusing device operable an X-Y scanner located downstream the modified beam.

Abstract: An optical scan unit (10) is configured to include a light source (11), a divergent light conversion element (12) having such positive power as to convert divergent light from the light source (11) into convergent light to form a spot on a projection plane, an optical deflector (13) deflecting a light beam from the divergent light conversion element (12) to a first scan direction and a second scan direction which is orthogonal to the first scan direction, and a deflection angle conversion element 14 (14) having such negative power as to convert a deflection angle of the light deflected by the optical deflector (13).

Abstract: A laser scanning projection apparatus includes an illumination unit, a projection surface, a scanning mirror, a projection window, an optical sensor, and a controlling unit. The projection window includes a transmissible part and a blocking part. A reflection-differential pattern is formed on the blocking part. When the laser beam reflected by the scanning mirror is projected on the transmissible part, the laser beam is transmitted through the transmissible part and projected on the projection surface. When the laser beam reflected by the scanning mirror is projected on the reflection-differential pattern, a reflective beam with different intensities is reflected by the reflection-differential pattern. The controlling unit calculates a phase difference between an actual projection position and a predetermined projection position of the laser beam according to the sensing signal, and compensating a subsequent image frame according to the phase difference.

Abstract: An optical inspector includes a radiating source, a time varying beam reflector, a telecentric scan lens, a first and second lens, a field stop, and a detector. The radiating source irradiates a first position of on the time varying beam reflector with a source beam. The time varying beam reflector directs the source beam to the telecentric scan lens, which in turn directs the source beam to a sample. The first lens focuses scattered radiation from the sample to generate multiple scan lines at a first focal plane. The field stop is positioned at the first focal plane to block one or more scan lines at the first focal plane. The scan line not blocked by the field stop propagates to the second lens. The second lens de-scans the scan line and generates a point of scattered radiation at a second focal plane where the detector input is located.

Abstract: A surface-emitting laser device includes a transparent dielectric layer provided in an emitting region and configured to cause a reflectance at a peripheral part to be different from a reflectance at a central part in the emitting region. In the surface-emitting laser device, the thickness of a contact layer is different between a region having a relatively high reflectance and a region having a relatively low reflectance in the emitting region. The contact layer is provided on the high refractive index layer of an upper multilayer film reflecting mirror, and the total optical thickness of the high refractive index layer and the contact layer in the region having the relatively low reflectance is deviated from an odd number multiple of a one quarter oscillation wavelength of laser light emitted from the emitting region.

Abstract: In a scanning optical apparatus, an illumination optical system has a diffractive power ?dM in a main scanning direction, a diffractive power ?dS in a sub-scanning direction, a refractive power ?nM in the main scanning direction, and a refractive power ?nS in the sub-scanning direction. A ratio ?nM/?dM in the main scanning direction for a focal length fi in a range of 10-30 mm satisfies: g2(fi)??nM/?dM?g1(fi), where A(Z)=(3.532×107)Z2+3023Z+0.7010, B(Z)=(5.719×107)Z2+4169Z+0.7678, C(Z)=(1.727×107)Z2+3244Z+0.4217, D(Z)=(1.373×108)Z2+3232Z+1.224, g1(fi)=fi{D(Z)?B(Z)}/20?0.5D(Z)+1.5B(Z), g2(fi)=fi{C(Z)?D(Z)}/20?0.5C(Z)+1.5A(Z), and a ratio ?nS/?dS in the sub-scanning direction satisfies: ?nS/?dS<1.3.

Abstract: An optical scanner includes a polygonal mirror; a mirror for reflecting the beam from the polygonal mirror; an optical box having a cap and containing the mirror;a first mirror regulating portion in a direction of a normal line of the mirror, the first regulating portion being provided opposed to such a surface of the reflecting surface and a back surface as is closer to the cap; and a second mirror regulating portion in a beam sub-scanning direction, the second regulating portion being provided opposed to such a surface of the mirror as is closer to the cap; wherein the mirror has a plurality of apex lines, and the first regulating portion and the second regulating portion are disposed at positions which are remoter from the cap than the apex line that is closest to the cap, with respect to a direction perpendicular to a main scan direction.

Abstract: An optical scanner is configured such that an anamorphic condensing lens in an incident optical system has a diffractive lens structure at least in one lens surface thereof, and a length of an optical path increased by the diffractive lens structure ? [rad] is defined by an equation below by a function of height h from an optical axis: ?(h)=M(P2·h2+P4·h4+ . . . ), where Pn is a coefficient of an nth-order term of the height h (n is an even number), and M is a diffraction order, that the lens satisfies the following relations: ?216?P2??49, 1100?P4·(hm max)4/(fm·NAm4)?3800, and 10?fm?35, where hmmax [mm] is an effective diameter in the main scanning direction, fm [mm] is a focal length in the main scanning direction, and NAm is a numerical aperture in the main scanning direction, and that a wavefront aberration WFE1 [?rms] in a first wavelength ?1 [nm] satisfies the following relation: WFE1?0.01.

Abstract: An image display device includes a lens array, and a scanner to two-dimensionally scan the lens array with a light beam for image display, in which each of lenses of the lens array includes a convex surface with different curvatures in two directions orthogonal to the optical axis of the lens and to each other.

Abstract: Provided is an optical scanning apparatus, including: an optical deflector having a polygon mirror reflecting a light flux emitted from a light source to carry out scanning, a drive unit rotating the polygon mirror about a rotation shaft, and a board supporting the drive unit; an optical box to which the board is fixed; two holes provided in the optical box, through which two screws fixing the board are inserted, respectively; two bearing surfaces provided on the optical box at positions around the two holes, respectively, the two bearing surfaces supporting the board; and an abutment portion provided on the optical box and abutting against a portion that is prevented from being pressed by the two screws in the board which is sandwiched between the two screws and the two bearing surfaces so as to be fixed to the optical box.

Abstract: A plastic article is formable by using a metal die having a cavity to accommodate melted resin therein at a given pressure. The plastic article includes a transfer face to which is transferred a face shape of the metal die, a projection disposed at least one face other than the transfer face, an incomplete transfer face having a concave shape disposed at the same face on which the projection is disposed, formed by an incomplete transfer of a face shape of the cavity of the metal die, and an incomplete transfer face having a convex shape disposed at least one face other than the transfer face.

Abstract: An optical scanning device that scans a plurality of surfaces to be scanned in a main scanning direction by using a light beam includes: a plurality of light sources; a light deflector that deflects a plurality of light beams emitted from the light sources; and a scanning optical system that individually guides each one of the light beams deflected by the light deflector to a corresponding one of the surfaces to be scanned. The scanning optical system includes one scanning lens shared by the light beams, and at least one surface of the scanning lens has a plurality of optical surfaces corresponding to the plurality of light beams disposed in a sub-scanning direction with a flat surface provided between the optical surfaces.

Abstract: A light scanning unit and an electro-photographic image forming apparatus employing the same are provided.

Abstract: An image display device having a scanning characteristic excellent in the linearity without being upsized is provided. The image display device includes: an optical scanning unit that scans a light emitted from a light source in a first direction and a second direction of an image plane due to a rotational movement of reciprocation of a reflecting surface of the light; and an optical system enlarges a scanning angle of the scanned light, in which the optical system has a free curved surface lens on an optical scanning unit side, and has a free curved surface mirror on an image plane side. The free curved surface mirror may be arranged so that the first direction is substantially parallel to a first plane defined by an incident optical beam and a reflected light in the free curved surface mirror when the optical scanning unit remains static in the center of the scanning range.

Abstract: An optical scanning apparatus scanning a light in a specific direction comprises a light source configured to irradiate a light; a diaphragm plate configured to comprise an opening section through which the light from the light source passes; and a holder configured to hold the diaphragm plate. The holder holds the diaphragm plate in a state of curving the diaphragm plate. The diaphragm plate in a curved state elastically deforms and comes into close contact with the holder through elastic deformation force.

Abstract: A light scanning unit and an electrophotographic image forming apparatus are provided. The light scanning unit includes a light source emitting the light beams according to an image signal, an incident optical system including a flux-limiting element limiting the flux of light beams emitted by the light source, an optical deflector deflecting the light beams emitted by the light source in a main scanning direction, and an image forming optical system including a scanning optical element imaging the light beams deflected by the optical deflector on a scanning target surface, the light scanning unit forming an electrostatic latent image by scanning the light beams to the scanning target surface of the image bearing member. The scanning optical element of the scanning optical elements of the image forming optical system is eccentrically arranged from a central optical axis of the image forming optical system in a sub-scanning direction.

Abstract: An optical scanning device is provided, which includes a casing including a supporting wall supporting a deflector, a first reflecting mirror supporting portion and a second reflecting mirror supporting portion that are opposed to each other across the deflector and extend from the supporting wall and a reinforcing wall configured to extend from the supporting wall, between the deflector and first and second light source units, so as to connect the first reflecting mirror supporting portion with the second reflecting mirror supporting portion, the reinforcing wall including a first through-hole configured such that a first laser beam emitted by the first light source unit toward the deflector and the second laser beam emitted by the second light source unit toward the deflector pass therethrough.

Abstract: A scanning optical device wherein, on the basis of positional information concerning a spacing in a main-scan direction between imaging positions of a plurality of light beams passed through resin-made imaging optical elements and detected by a photodetecting device and a spacing between the imaging positions in a sub-scan direction of the plurality of light beams, a focal shift direction and a focal shift amount in the main-scan direction as well as a focal shift direction and a focal shift amount in the sub-scan direction are determined, and wherein an optical element of an input optical system is moved in an optical axis direction based on the determination, to correct the focal shift in the main-scan direction and the focal shift in the sub-scan direction.

Abstract: An optical scanning device includes: a light source including a plurality of light-emitting elements; a deflector that defects light beams output from the light source; a scanning optical system that condenses the light beams deflected on the deflector onto a surface to be scanned, and includes at least one resin scanning lens and at least one folding mirror disposed behind the at least one resin scanning lens; a light-receiving element to which part of the light beams, which is deflected on the deflector but not used for scanning the surface, enters not via the at least one folding mirror as light-amount monitoring light beams; and a controller that controls a driving signal for the light-emitting elements based on an output signal from the light-receiving element.

Abstract: An optical device includes a long mirror; a mirror pressing member configured to fix the long mirror; a mirror-reflective-surface receiving member configured to be in contact with a reflective surface of the long mirror; and at least two mirror receiving members configured to be in contact with a face other than the reflective surface of the long mirror in a mirror longitudinal direction so that a distance between the mirror receiving members in the mirror longitudinal direction is variable.

Abstract: In accordance with an embodiment, an optical scanning apparatus for exposing a photoconductor includes a light source, a deflecting device, an imaging optical system and a light-guiding optical system. The light source configured to emit a light beam. The deflecting device configured to deflect and scan the light beam from the light source. The imaging optical system configured to form an image by using the deflected and scanned light beam on the photoconductor. The light-guiding optical system configured to guide the light beam passing through the imaging optical system to a photodetector.

Abstract: An optical scanning projection system includes a scanning light source component, a second reflecting element, a transparent element, a scanning element, a photosensitive element and a control module. The transparent element receives a main light beam emitted by the scanning light source component and reflects a part of the main light beam to be a reflected light. The reflected light is reflected by the second reflecting element, and the scanning element reflects the reflected light from the second reflecting element in a scanning manner. The photosensitive element receives the reflected light from the scanning element and outputs a sensing signal, and the control module actuates or stops actuating the scanning light source component according to the sensing signal. Therefore, when the scanning element is damaged, the control module may instantly stop actuating the scanning light source component, thereby enhancing the using safety of the optical scanning projection system.

Abstract: A laser scanning device includes a laser output unit, a scanner, a light splitting unit, an imaging compensation unit, a detection unit, and a control unit. A scanning focusing unit included in the scanner focuses a laser beam emitted by the laser output unit to scan an object. A visible light beam received by the canning focusing unit is reflected by the light splitting unit and is incident into the imaging compensation unit. Next, the detection unit receives the visible light beam passing through the imaging compensation unit, and outputs a detection signal. The control unit adjusts the detection signal according to the wavelength of the visible light beam, the wavelength of the laser beam, the scanning focusing unit, and the imaging compensation unit. Therefore, the laser scanning device may compensate the aberration and the dispersion caused when the visible light beam passes through the scanning focusing unit.

Abstract: Provided is a method of manufacturing imaging optical elements which cause a plural light beams to enter a deflection unit, and guide those beams to corresponding surfaces to be scanned, the imaging optical elements being arranged optically at the same position, having the same optical performance, the method including: measuring, with respect to the imaging optical elements having the same optical performance, the optical performance at each of a plurality of positions of the different light beam passing states; calculating a correction shape of an optical functional surface of the imaging optical element based on a deviation amount from a design value of the optical functional surface of the imaging optical element; performing correction processing on a shape of a mirror-finish insert of a mold for molding based on the correction shape of the optical functional surface; and performing molding by using the mirror-finish insert subjected to the correction processing.

Abstract: The present invention provides a scanning system (100) comprising a first port for receiving or emitting a stationary beam (60) of electromagnetic radiation, a second port for emitting or receiving a scanning beam of electromagnetic radiation, the scanning beam scanning in a main scanning direction, a scanning element (61) for relaying the stationary beam (60) into the scanning beam or vice versa, an optical system between the scanning element (61) and the second port, wherein the optical system comprises at least a first mirror (63) and a second mirror (64) having a rotationally symmetric curved mirror surface around their optical axis, at least one of the first and the second curved mirror surface having an aspheric shape, and wherein the first and the second mirror (63, 64) have an off-axis decentered aperture and are offset in position in a direction perpendicular to the main scanning direction.

Abstract: A light scanning probe includes: a probe main body; a light scanner that includes a scanner module that is driven to rotate and a beam reflector that includes a plurality of reflection surfaces which alter a path of light being scanned by the scanner module, wherein the light scanner is disposed within the probe main body; and an optical fiber that guides light which is received from a light input unit toward the scanner module. A medical imaging apparatus includes the light scanning probe that irradiates light toward an object; a receiver that receives a signal which is generated in the object; and a signal processor that processes the signal received by the receiver.

Abstract: Irradiance control systems (“ICSs”) that control the irradiance of a beam of light are disclosed. ICSs include in a beam translator and a beam launch. The beam translator translates the beam substantially perpendicular to the propagating direction of the beam with a desired displacement so that the beam launch can remove a portion of the translated beam and the beam can be output with a desired irradiance. The beam launch attenuates the irradiance of the beam based on the amount by which the beam is translated. ISCs can be incorporated into fluorescent microscopy instruments to provide high-speed, fine-tune control over the irradiance of excitation beams.

Abstract: A laser beam processing machine comprising a laser beam application means for applying a laser beam to a workpiece held on a chuck table, a processing-feed means, an indexing-feed means, a processing-feed amount detection means for detecting the amount of feed, an indexing-feed amount detection means, and a control means, wherein the condenser constituting the laser beam application means comprises an elliptic spot forming means for forming a focal spot into an elliptic shape and a focal spot turning means for turning the elliptic focal spot on an optical axis at the center thereof; and the control means comprises a storage means for storing the X, Y coordinate values of a processing line formed on the workpiece, obtains the X, Y coordinate values of the current position of a laser beam application position based on detection signals from the processing-feed amount detection means and the indexing-feed amount detection means, and controls the focal spot turning means to ensure that the long axis of the focal

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: Various light-scanning systems that can be used to perform rapid point-by-point illumination of a focal plane within a specimen are disclosed. The light-scanning systems can be incorporated in confocal microscopy instruments to create an excitation beam pivot axis that lies within an aperture at the back plate of an objective lens. The light-scanning systems receive a beam of excitation light from a light source and direct the excitation beam to pass through the pivot point in the aperture of the back plate of the objective lens while continuously scanning the focused excitation beam across a focal plane.

Abstract: An optical scanning device includes a light source for emitting a laser beam; a deflection body for deflecting the laser beam; a scanning lens for scanning the deflected laser beam on the surface of a photosensitive body; a reflection body having a reflection surface for reflecting the deflected laser beam towards the photosensitive body and having passed through the scanning lens; and a synchronizing sensor for receiving the reflected laser beam to send out a detection signal. The reflection surface has a curved arc surface depressed from both edges toward a center in a main-scanning direction equivalent to a scanning direction of the laser beam. The reflection body has a center of the reflection surface in the main-scanning direction displaced by a predetermined range in the direction of travel of the laser beam along the main-scanning direction from a center of the reflection body in the main-scanning direction.

Abstract: An optical scanning apparatus includes a light source, a deflector that deflects a light beam in a main scanning direction, an incident optical system that makes the light beam enter the deflecting surface in a sub-scanning section, and an imaging optical system that includes at least one imaging optical element and condenses the light beam onto a surface to be scanned, in which at least one of an incident surface and an exit surface of the at least one imaging optical element is decentered in the sub-scanning section such that an origin position line exists in a region sandwiched between marginal rays at two sub-scanning direction ends of the light beam, the origin position line being extended in the main scanning direction and passing through an origin of an aspherical surface formula defining a surface shape of each of the incident surface and the exit surface in the sub-scanning section.

Abstract: A scanner for an endoscope comprising: a scanning mechanism comprising a light transmitter and arranged to move the light transmitter to perform a scan; a lens system arranged to optically couple the light transmitter to a target during a scan; a first housing which houses at least a first portion of the lens system; a second housing which houses at least the fibre scanning mechanism; and a bendable joint joining the first and second housings such that in a scanning configuration the bendable joint joins the first and second housings so that optical elements in the first and second housings are aligned at a working separation, the bendable joint arranged to bend in response to insertion forces applied to the scanner during insertion of the scanner and revert to the scanning configuration in the absence of insertion forces.

Abstract: A scanning type image display apparatus includes a light source unit for emitting a laser beam, a scanning mirror for scanning the laser beam two-dimensionally in a first direction and a second direction that intersects the first direction, and a control unit for controlling driving of the scanning mirror. The control unit drives the scanning mirror such that a scanning frequency in the first direction is higher than a scanning frequency in the second direction, and varies a scanning amplitude in the first direction by varying the scanning frequency in the first direction in synchronization with a period of the scanning frequency in the second direction.

Abstract: A method and system for providing illumination is disclosed. The method may include providing a laser having a predetermined wavelength; performing at least one of: beam splitting or beam scanning prior to a frequency conversion; converting a frequency of each output beam of the at least one of: beam splitting or beam scanning; and providing the frequency converted output beam for illumination.

Abstract: An optical scanner is configured such that an anamorphic condensing lens in an incident optical system has a diffractive lens structure at least in one lens surface thereof, and a length of an optical path increased by the diffractive lens structure ? [rad] is defined by an equation below by a function of height h from an optical axis: ?(h)=M(P2·h2+P4·h4+ . . . ), where Pn is a coefficient of an nth-order term of the height h (n is an even number), and M is a diffraction order, that the lens satisfies the following relations: ?216?P2??49, 1100?P4·(hm max)4/(fm·NAm4)?3800, and 10?fm?35, where hmmax [mm] is an effective diameter in the main scanning direction, fm [mm] is a focal length in the main scanning direction, and NAm is a numerical aperture in the main scanning direction, and that a wavefront aberration WFE1 [?rms] in a first wavelength ?1 [nm] satisfies the following relation: WFE1?0.01.

Abstract: A surface-emitting laser device configured to emit laser light in a direction perpendicular to a substrate includes a p-side electrode surrounding an emitting area on an emitting surface to emit the laser light; and a transparent dielectric film formed on an outside area outside a center part of the emitting area and within the emitting area to lower a reflectance to be less than that of the center part. The outside area within the emitting area has shape anisotropy in two mutually perpendicular directions.

Abstract: Optical MEMS scanning micro-mirror comprising:—a movable scanning micro-mirror (101) pivotally connected to a MEMS body (102) substantially surrounding the lateral sides of the micro-mirror;—an transparent prism (500, 600) substantially covering the reflection side of the micro-mirror;—wherein said prism has its outer face non-parallel to the micro-mirror neutral plane N-N, thereby providing a dual anti-speckle and anti-reflection effect, namely against parasitic light. The invention also provides the corresponding micro-projection system and method for reducing speckle.

Abstract: A light beam is scanned, for use in laser radar and other uses, by an optical system of which an example includes a beam-shaping optical system that includes a first movable optical element and a second movable optical element. The first optical element forms and directs an optical beam along a nominal propagation axis from the beam-shaping optical system to a target, and the second optical element includes a respective actuator by which the second optical element is movable relative to the first optical element. A controller is coupled at least to the actuator of the second optical element and is configured to induce motion, by the actuator, of the second optical element to move the optical beam, as incident on the target, relative to the nominal propagation axis.

Abstract: An optical device includes: a light source that emits a light beam; a deflector that deflects the light beam in a main-scanning direction; and a scanning/image-forming optical system that includes a scanning lens that causes the light beam deflected by the deflector to converge to a scanned surface to form an image on the scanned surface. The scanning lens has refractive index gradient. At least one surface of the scanning lens is a tilt-decentered surface that has a tilt angle, which depends on a position in the main-scanning direction, in a sub-scanning direction. The tilt angle is set so as to compensate for variation, which results from the refractive index gradient, in direction of the light beam in the sub-scanning direction.

Abstract: There is provided an illumination optical system including a laser light source, an integrator element, an oscillating element being capable of guiding the laser beam emitted from the laser light source to the integrator element, and oscillating to change an incident angle of the laser beam to the integrator element, and a light collecting element for collecting the laser beam emitted from the oscillating element. Also, there are provided a light irradiation apparatus for spectrometry and a spectrometer.

Abstract: An optical scanning device includes a light source which emits a light beam, a deflector, an incident optical system and one scanning lens. The deflector reflects and deflects/scans the light beam emitted from the light source. The scanning lens includes a first face facing the deflector and a second face on an opposite side to the first face, and performs imaging of the deflected/scanned light beam on a surface to be scanned. In a main scanning cross section, when an angle relative to an optical axis of an incident light beam which enters the scanning lens from the first face is ?in, and an angle relative to an optical axis of an outgoing light beam which is output from the second face toward the surface to be scanned is ?out, in an entire scanning region, a condition of 0.9<?in/?out<1.3 is satisfied.

Abstract: An optical scanning device includes a light source, a deflector, an incident optical system and one scanning lens. The scanning lens includes a first face and a second face. In a main scanning direction cross section of the scanning lens, when a scanning range is separated, with on axis as a reference, into an image height region of a first direction and an image height region of a second direction that is opposite to the first direction, the incident optical system is disposed on a side of the image height region of the first direction. Curvature of the first face in a sub scanning direction cross section decreases from on axis toward off axis in the main scanning direction, and curvature of the second face in the sub scanning direction cross section increases from off axis of the first direction toward the second direction in the main scanning direction.

Abstract: An optical scanning device includes a light source which emits a light beam, a deflector, an incident optical system and one scanning lens. The deflector reflects and then deflects/scans the light beam emitted from the light source. The scanning lens includes a first face facing the deflector and a second face on an opposite side to the first face, and performs imaging of the deflected/scanned light beam on a surface to be scanned. When a curvature radius of the first face in a main scanning direction cross section is R1, a curvature radius of the second face in a main scanning direction cross section is R2, a lens thickness in an optical axis direction at a center of the scanning lens in the main scanning direction is d, and a refractive index of the scanning lens is n, following Formula (1) and Formula (2) are satisfied: 0<R2<R1??(1) 0>R2?R1>?(n?1)d/n??(2).

Abstract: A curve correction mechanism for correcting a direction and degree of curvature of a reflecting mirror that reflects a light beam includes an adjuster to contact and move a pressing member between a first position, where a first pressing portion of the pressing member presses against an outboard portion of the reflecting mirror provided outboard from a support that supports the reflecting mirror in a longitudinal direction of the reflecting mirror while a second pressing portion of the pressing member is isolated from the reflecting mirror, and a second position, where the second pressing portion of the pressing member presses against an inboard portion of the reflecting mirror provided inboard from the support while the first pressing portion of the pressing member is isolated from the reflecting mirror.

Abstract: A compact optical assembly for a laser radar system is provided, that is configured to move as a unit with a laser radar system as the laser radar system is pointed at a target and eliminates the need for a large scanning (pointing) mirror that is moveable relative to other parts of the laser radar. The optical assembly comprises a light source, a lens, a scanning reflector and a fixed reflector that are oriented relative to each other such that: (i) a beam from the light source is reflected by the scanning reflector to the fixed reflector; (ii) reflected light from the fixed reflector is reflected again by the scanning reflector and directed along A line of sight through the lens; and (iii) the scanning reflector is moveable relative to the source, the lens and the fixed reflector, to adjust the focus of the beam along the line of sight.