Abstract: An optical device may include a lens system. The optical device may include a first scanning component to receive an optical beam and to scan the lens system with the optical beam. The optical device may include a second scanning component to receive the optical beam from the lens system and to scan a field of view with the optical beam, where the lens system is positioned between the first scanning component and the second scanning component. The lens system may include a beam expander.

Abstract: To provide an illumination device and a projection type image display device that illuminate an area to be illuminated (image formation area) under conditions where speckle noise is less noticeable. An illumination device according to the present invention includes: a light source 11 that emits coherent light; an optical scanning section 15 that scans the coherent light emitted from the light source 11; a lens array 22 including a plurality of element lenses and configured to diverge the light scanned by the optical scanning section; an optical path conversion system 23 configured to control a diverging angle of the diverging light to be emitted from respective points of the lens array 22 and to allow the diverging light whose diverging angle has been controlled to illuminate an area to be illuminated sequentially in an overlapping manner.

Abstract: Apparatus and methods for optical scanning, including an optical probe capable of motion for optical scanning with respect to both the interior and the exterior of a scanned object, the optical probe also including light conducting apparatus disposed so as to conduct scan illumination from a source of scan illumination through the probe; light reflecting apparatus disposed so as to project scan illumination radially away from a longitudinal axis of the probe with at least some of the scan illumination projected onto the scanned object; optical line forming apparatus disposed so as to project scan illumination as a line of scan illumination with at least some of the scan illumination projected onto the scanned object; and a lens disposed so as to conduct, through the probe to an optical sensor, scan illumination reflected from the scanned object.

Abstract: Systems, devices, and methods are presented that facilitate electronic manipulation and detection of submicron particles. A particle manipulation device contains a plurality of electrodes formed on an active semiconductor layer of an integrated circuit chip, where the electrodes and gap spacing between adjacent electrodes is submicron in size. The chip is oriented with its substrate face up, and at least a portion of the substrate is removed from the chip so the electrodes are in close proximity to a fluid chamber(s) placed over the chip, to facilitate manipulation of particles, contained in a buffer solution in the fluid chamber(s), to form a defined pattern. Innovative macro-scale optical detection is employed to detect the submicron particles, where a light beam is applied to the defined pattern, and interaction of the defined pattern with the light beam is detected and evaluated to facilitate detecting the particles.

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: 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: An optical element used in an optical scanning apparatus includes a diffracting surface composed of a diffraction grating. The diffracting surface includes a diffraction grating having a sectional shape linearly formed. If diffraction power in a main scanning direction on the diffracting surface received by an axial light flux is ?DO and refractive power in the main scanning direction on a refracting surface on which the diffraction grating is formed received by the axial light flux is ?ref, the optical element satisfies the following conditions: 0<?DO<1.8×10?3(1/mm), and 0.5|?DO|<|?ref|<1.5|?DO|, where the diffraction power ?DO and the refractive power ?ref have opposite signs.

Abstract: The invention relates to a beam-forming array for projecting a divergent isotropic cloud of light points. The array comprises a source (4) for emitting electromagnetic radiation, a receiving or connecting possibility for a power source (2), an electrical or electronic subassembly (5), and an optical unit (6) that is arranged in a housing (1) along with the radiation source (4). The radiation source (4) is a semiconductor diode laser or a light emitting diode (LED) while the optical unit (6) is composed of at least two superimposed and grid-shaped spectral films that are offset relative to each other or a diffractive optical element. The optical unit (6) limits the intensity of the emitted radiation and the distance of the light point beams relative to one another to a value that does not pose any risk to a human eye.

Abstract: An optical scanning device includes a diffractive optical element. The diffractive optical element is a hybrid lens in which a resin layer is joined to a glass-lens base material, and a diffractive surface is provided in the resin layer. The diffractive surface has a multi-step structure including a plurality of zonal surfaces and a plurality of step surfaces.

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 head-mounted display includes a light source, a light scanner, an emitter, and a two-dimensional diffraction grating. The light source emits light having an intensity corresponding to an image signal. The light scanner performs two-dimensional scanning with the light emitted from the light source to produce image light. The head-mounted display emits the image light from the emitter. The two-dimensional diffraction grating is provided at a position near an intermediate image plane located in an optical path between the light source and the emitter. The diffraction grating enlarges an exit pupil of the head-mounted display. The diffraction grating has a multistep structure with groove depth changes of at least three discrete levels.

Abstract: An optical element used in an optical scanning apparatus includes a diffracting surface composed of a diffraction grating. The diffracting surface includes a diffraction grating having a sectional shape linearly formed. If diffraction power in a main scanning direction on the diffracting surface received by an axial light flux is ?DO and refractive power in the main scanning direction on a refracting surface on which the diffraction grating is formed received by the axial light flux is ?ref, the optical element satisfies the following conditions: 0<?DO<1.8×10?3(1/mm), and 0.5|?DO|<|?ref|<1.5|?DO|, where the diffraction power ?DO and the refractive power ?ref have opposite signs.

Abstract: An optical beam scanning device includes a polygon mirror 80 in which tilt angles with respect to a rotation axis of the polygon mirror 80 of respective plural reflecting surfaces are set to angles corresponding to photoconductive members associated with the respective reflecting surfaces, a post-deflection optical system A1 that guides light beams reflected and deflected by the respective plural reflecting surfaces in the polygon mirror 80 to the photoconductive surfaces of the photoconductive members corresponding to the respective reflecting surfaces, and a pre-deflection optical system 7a that shapes the light from the light source to be a light beam of a predetermined sectional shape and guides the light beam to the polygon mirror 80, the pre-deflection optical system 7a guiding the light from the light source to the polygon mirror 80 through an optical path that passes, in the main scanning direction, on an optical axis of the post-deflection optical system A1 and passes, in the sub-scanning direction,

Abstract: In an image forming apparatus according to the invention, an optical beam scanning apparatus of an overillumination scanning optical system includes a laser, a pre-deflection optical system, a polygon mirror, and a post-deflection optical system, wherein the post-deflection optical system includes at least one optical element configured by allowing a resin to flow into a molding die through a gate opening provided in advance to the molding die and then molding the resin into a prescribed shape; and in the optical element, a side corresponding to aside of the gate opening through which the resin flows is provided to a light incidence side where the luminous flux enters into the polygon mirror.

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: According to one aspect of the present invention, there is provided an illumination apparatus 110 including a laser source 11, a two dimensional diffraction optics 13 on which laser beam from the laser source is made incident, a rectangular rod 14 on which diffraction beams from the two dimensional diffraction optics 13 are made incident and through which incident beams travel while repeating total reflection, and a galvano mirror 12 changing an incident position of the diffraction beams from the two dimensional diffraction optics 13 in an incident end surface of the rectangular rod 14.

Abstract: In an image forming apparatus according to the invention, an optical beam scanning apparatus of an overillumination scanning optical system includes a laser, a pre-deflection optical system, a polygon mirror, and a post-deflection optical system, wherein the post-deflection optical system includes at least one optical element configured by allowing a resin to flow into a molding die through a gate opening provided in advance to the molding die and then molding the resin into a prescribed shape; and in the optical element, a side corresponding to a side of the gate opening through which the resin flows is provided to a light incidence side where the luminous flux enters into the polygon mirror.

Abstract: An optical axis of at least one surface of a resin-made diffracting lens is shifted in a main scanning direction with respect to an incident beam. A synchronous detection can cancel a problem of a misalignment in the main scanning direction due to a temperature variation. A light reflected from a second surface of the resin-made diffractive lens condenses on a position that is displaced in an optical axis direction from an optical beam outgoing point of a semiconductor laser, and thereby the light reflected again from the semiconductor laser does not form an image on a scanned surface and an impact on the image becomes low.

Abstract: In an image forming apparatus provided with an optical beam scanning apparatus according to the invention, an optical beam scanning apparatus of an overillumination scanning optical system includes a semiconductor laser device as a light source, a pre-deflection optical system, a polygon mirror, and a post-deflection optical system, with a width of the luminous flux made incident on the polygon mirror being wider than a width of one reflecting surface forming the polygon mirror, wherein at least two sheets of flat plate for transmitting the luminous flux scanned by the polygon mirror are provided in the post-deflection optical system. In accordance with an image forming apparatus provided with an optical beam scanning apparatus according to the invention, not only a wave front aberration on a photoconductive drum can be suitably corrected, but suitable beam diameter and beam profile can be obtained on the photoconductive drum.

Abstract: A scanning type image display apparatus is disclosed which is capable of forming an exit pupil with a shape and a size which facilitate observation. The apparatus includes a scanning unit, a first optical system introducing a light flux to the scanning unit, a second optical system converging the light flux from the scanning unit, a diffractive optical element receiving the converged light flux, and an ocular optical system. Two directions in diametral directions of the light flux are first and second directions. The optical element increases the divergent angles of an emerging light flux therefrom in the first and second directions as compared with the convergent angles of an incident light flux thereinto in the two directions and increases the divergent angle of the emerging light flux in the first direction as compared with the divergent angle thereof in the second direction.

Abstract: A retinal scanning display device is disclosed which is configured to include: a light source emitting a light beam; a scanner scanning onto a viewer's retina the light beam emitted from the light source; a light exit at which the light beam scanned by the scanner exits the retinal scanning display device; and a pupil expanding element operable to expand an exit pupil of the retinal scanning display device. The pupil expanding element may be disposed at a position which is offset from an intermediate image plane occurring between the light source and the light exit, along and within an optical path defined between the light source and the light exit.

Abstract: There is provide a technique in which in an optical beam scanning device, optical characteristics can be suitably corrected according to a change in environmental temperature.

Abstract: There is provided a technique in which in an optical beam scanning device, optical characteristics can be suitably corrected according to a change in environmental temperature.

Abstract: In an image forming apparatus provided with an optical beam scanning apparatus according to the invention, an optical beam scanning apparatus of an overillumination scanning optical system includes a semiconductor laser device as a light source, a pre-deflection optical system, a polygon mirror, and a post-deflection optical system, with a width of the luminous flux made incident on the polygon mirror being wider than a width of one reflecting surface forming the polygon mirror, wherein at least two sheets of flat plate for transmitting the luminous flux scanned by the polygon mirror are provided in the post-deflection optical system. In accordance with an image forming apparatus provided with an optical beam scanning apparatus according to the invention, not only a wave front aberration on a photoconductive drum can be suitably corrected, but suitable beam diameter and beam profile can be obtained on the photoconductive drum.

Abstract: Briefly, in accordance with one or more embodiments, time averaged Moiré patterns may be utilized in a scanned beam display having a Gaussian beam profile or the like in order to tailor uniformity of the image by controlling both the near field and far field regions of the display to result in a stable and uniform scanned beam display image. Consideration is made regarding the light source parameters of focus numerical aperture, profile, shape, and/or wavelength to achieve higher uniformity and stability without resulting in significant visible coherent artifacts such as tiled intensity patterns and/or Moiré.

Abstract: In an image forming apparatus according to the invention, an optical beam scanning apparatus of an overillumination scanning optical system includes a laser, a pre-deflection optical system, a polygon mirror, and a post-deflection optical system, wherein the post-deflection optical system includes at least one optical element configured by allowing a resin to flow into a molding die through a gate opening provided in advance to the molding die and then molding the resin into a prescribed shape; and in the optical element, a side corresponding to a side of the gate opening through which the resin flows is provided to a light incidence side where the luminous flux enters into the polygon mirror.