Abstract: A laser beam display device that can dynamically control the resonant frequency of a mirror is provided. The increase the reliability of a device by controlling the resonant frequency of a mirror instead of requiring components of a display device to react to changes in the resonant frequency of a mirror. A controller can drive a mirror with an input signal, receive a signal or data indicating a target resonant frequency, and bias the input signal to control the resonant frequency of the mirror. In some embodiments, the controller can also receive a feedback signal from a mirror indicating a current resonant frequency. The controller can also bias the input signal to increase or decrease the current resonant frequency. By dynamically controlling the resonant frequency of a mirror, a device can minimize any difference between the current resonant frequency detected in a feedback signal and the target resonant frequency.

Abstract: An optical module is provided. The optical module includes a substrate, an optical element, a cover plate, and a heat-dissipating device. The optical element is disposed on the substrate, wherein the optical element has a first side and a second side opposite the first side. The cover plate is disposed on the second side of the optical element, and extends over the substrate. In addition, the substrate is disposed between the heat-dissipating device and the optical element.

Abstract: An actuator includes a driving beam that includes a beam extending in a direction orthogonal to a predetermined axis and supports an object to be driven; a driving source that is formed on a surface of the beam and causes the object to rotate around the predetermined axis; a sensor beam that extends in a direction that is the same as the direction in which the beam extends, one end of the sensor beam being connected to a lateral side of the beam; and a sensor that is formed on a surface of the sensor beam, the surface of the sensor beam and the surface of the beam facing the same direction.

Abstract: An optical device comprises a support having a reference plane, and a dielectric periodic structure including a plurality of periodic elements which are arranged, on the reference plane, in a two-dimensional lattice having a sub-wavelength spacing and are either projections projecting from the reference plane or recesses depressed from the reference plane. The optical device further includes a metal layer, which is positioned on a surface of the periodic structure including a region of the reference plane surrounding the individual periodic elements and the surfaces of the periodic elements and which has a shape that follows the surface profile of the periodic structure.

Abstract: The disclosed technology is directed to placing two galvanometer mirrors in a pupil conjugate relationship and at the same time preventing astigmatism from occurring while preventing images from being degraded by flaws and foreign matter on a lens. A scanning optical system includes two one-dimensional scanning means disposed closely to each other at a spaced interval therebetween in an optical axis direction for scanning a light beam from a light source in two scanning directions. An objective lens for focusing the light beam scanned by the scanning means onto a target. A plurality of optical elements is disposed in positions spaced from an intermediate image plane in the optical axis direction and having different optical powers in the two scanning directions. The positions and the optical powers of the respective optical elements are set to compensate for the spaced interval between the two scanning means in the optical axis direction.

Abstract: A side view mirror incorporating a plurality of cylinders, each cylinder having a mirrored rear wall, a lateral wall and an oppositely lateral wall; an air scoop having lateral and oppositely lateral walls, the air scoops' lateral wall including one of the cylinders' oppositely lateral walls and the air scoop's oppositely lateral wall including another cylinder's lateral wall; the side view mirror further incorporating an air nozzle having an intake end communicating with the air scoop, wherein the air scoop has front and rear walls, wherein the air scoop's front wall includes the one of the cylinders' mirrored rear walls, and wherein the air scoop's rear wall includes the another cylinder's mirrored rear wall; the side view mirror further incorporating a brace interconnecting the one of the cylinders and the another cylinder.

Abstract: Compact optical devices such as spectrometers are realized with metasurfaces within a dielectric medium confined by reflective surfaces. The metasurfaces control the phase profiles of the reflected electromagnetic waves within the device. In a compact spectrometer, the metasurfaces within the device separate the electromagnetic waves in different wavelengths. The metasurfaces are designed according to their phase profile by varying the size of the array of scatterers.

Abstract: Embodiments of the disclosure provide transmitters for light detection and ranging (LiDAR). The transmitter includes a plurality of laser sources and a light modulator. Each of the laser sources includes interleaved emitting regions and gaps and is configured to provide a native laser beam in a respective incident direction. The light modulator is configured to receive the native laser beams from the plurality of laser sources in different incident directions and combine the native laser beams into a combined laser beam in a diffraction direction.

Abstract: A method is described for generating a visible image on a projection surface, in the course of which visible light is emitted from a first laser resonator, the visible light is deflected in the direction of the projection surface with the aid of a deflection element, in particular a micromirror, in order to generate the image, and a light spot of visible light is generated on the deflection element, and invisible light is emitted from a second laser resonator, and a light ring is generated on the deflection element from the invisible light, which enlarges the light spot.

Abstract: A method of performing a complex Fourier transform of an input function including amplitude and phase information, including decomposing the input function into a plurality of sub-functions, wherein the Fourier transform of each sub-function includes an amplitude function and a phase function in which the phase is constrained to a plurality of possible phase values. The phase function of the Fourier transform of each sub-function is determined with an optical system that measures the amplitude function of an optical Fourier transform of the sub-function and changes in the amplitude function of the optical Fourier transform caused by applying a perturbation function to the sub-function. The determined phase functions and the measured amplitude functions are combined for each of the sub-functions to form the complex Fourier transform of the input function.

Abstract: A waveguide display element includes a waveguide comprising two opposing main surfaces, a first optical element arranged at a first location of the waveguide, a second optical element arranged at a second location of the waveguide, and at least one reflector surface extending between said main surfaces and adapted to reflect light rays propagating within the waveguide. The reflector surface is adapted to redirect light rays from the first optical element to the second optical element.

Abstract: A display includes a plurality of pixels arranged in matrix. Each of the pixels includes a single reflecting surface, and all the reflecting surfaces include a set of the reflecting surfaces that allow light incident in a predetermined direction to be reflected in a direction predefined for the respective reflecting surfaces, so that light reflected by all the reflecting surfaces forms an image which appears in a specific direction, which is a direction common to all the reflecting surfaces.

Abstract: An optical device comprises a support having a reference plane, and a dielectric periodic structure including a plurality of periodic elements which are arranged, on the reference plane, in a two-dimensional lattice having a sub-wavelength spacing and are either projections projecting from the reference plane or recesses depressed from the reference plane. The optical device further includes a metal layer, which is positioned on a surface of the periodic structure including a region of the reference plane surrounding the individual periodic elements and the surfaces of the periodic elements and which has a shape that follows the surface profile of the periodic structure.

Abstract: An image display optical apparatus and an image generating method thereof are disclosed. The image display optical apparatus includes a substrate arranged as at least one layer, at least one first diffractive element located on one side of the substrate and which receives a beam, and a plurality of second diffractive elements arranged at predetermined intervals on the substrate and which output beams diffracted by the at least one first diffractive element and guided through the substrate.

Abstract: A light source device includes: a light source part comprising a plurality of laser light sources, each laser light source being configured to emit light having a predetermined wavelength width; a plurality of collimators; a light-condensing part configured to adjust light emitted from the collimators into parallel light and to condense the parallel light; a diffraction grating configured to receive the condensed light; and an output coupler disposed in an optical path of diffracted light from the diffraction grating so as to form an external resonator with the laser light sources, wherein a reflecting surface of the output coupler is a depressed surface; and an adjusting lens disposed downstream of the output coupler, the adjusting lens being configured to convert light emitted from the output coupler into substantially parallel light or to condense the light emitted from the output coupler.

Abstract: According to an embodiment, a projection device includes: a light source; an optical scanning unit that includes a base unit, a driver fixed to the base unit, and a reflective unit supported by the driver and that drives the reflective unit to scan light from the light source; and a scanned unit configured to be scanned with the light from the optical scanning unit so that a projection image is formed on the scanned unit. The projection device further includes an attachment unit for attaching the projection device to a setting unit of a setting object on which the projection device is set. The attachment unit attaches the projection device to the setting unit such that a direction in which vibration caused by the setting object is equal to or smaller than a predetermined value and a reflective surface of the reflective unit are approximately perpendicular to each other.

Abstract: A substrate is provided with an abrasion resistance antireflection coating. The coated substrate includes a multilayer antireflection coating on at least one side. The coating has layers with different refractive indices, wherein higher refractive index layers alternate with lower refractive index layers. The layers having a lower refractive index are formed of silicon oxide with a proportion of aluminum, with a ratio of the amounts of aluminum to silicon is greater than 0.05, preferably greater than 0.08, but with the amount of silicon predominant relative to the amount of aluminum. The layers having a higher refractive index include a silicide, an oxide, or a nitride.

Abstract: A diffractive optical element may include sub-wavelength period stack-and-gap structured layers providing transmissive phase delay at a wavelength. The sub-wavelength period stack-and-gap structured layers may include a set of thin anti-reflection layers that are index matched to an environment or a substrate over a range of fill factors of the sub-wavelength period.

Abstract: A microscope includes a light source(s) which produce an illumination beam path comprising light in a plurality of wavelength regions. A dichroic beam splitter arrangement having a dichroic mirror surface is arranged between objective optics and a tube lens in a beam path portion to produce a reflected partial beam and a transmitted partial beam. The beam splitter arrangement changes a propagation direction of the reflected partial beam relative to the illumination beam path by a specified deflection angle. The mirror surface is arranged at an angle of 22.5±7.5°. The beam splitter arrangement includes a further mirror(s) arranged in the reflected beam path. The propagation direction of the reflected partial beam is changed by the specified deflection angle using the sum of all reflections on the mirror surface and the further mirror(s).

Abstract: A transmission grating includes: first light-transmissive regions having a refractive index of n1; and second light-transmissive regions having a refractive index of n2 that is smaller than n1. Light-reflecting interfaces on which light transmitted through the first light-transmissive regions is incident are in parallel with one another and are inclined such that a line normal to each of light-reflecting interfaces is at an inclination angle ? with respect to the flat light-incident surface and to the flat light-emitting surface, wherein 0°<?<90°. When a thickness of the first light-transmissive regions in a direction perpendicular to the light-reflecting surfaces is t1 and a thickness of the second light-transmissive regions in a direction perpendicular to the light-reflecting surfaces is t2, the thickness t2, in ?m, is in a range of 0.1/?(n12?n22)1/2 to t1.