78results about "Light guides for scanning" patented technology

There is provided an optical device including a light-transmitting substrate having at least two major surfaces and edges, optical means for coupling light into the substrate by total internal reflection and at least one partially reflecting surface located win the substrate.

A scanner for obtaining an image of an object placed on an at least partially transparent platform, wherein the platform is defined by edge portions and has at least including a first scan area and a second scan area. In one embodiment, the scanner includes a white area formed at least partially around the edge portions of the platform with a plurality of markers, optical means for sequentially scanning consecutive partial images of the object from the first scan area and the second scan area, respectively, wherein each of the consecutive partial images include an image of at least one of the plurality of markers, and an image processing system for using the image of the at least one of the plurality of markers in each of the consecutive partial images as a reference to combine the consecutive partial images so as to form a substantially complete image of the object corresponding to a full scan of the first scan area and the second scan area.

An optical device includes a liquid crystal layer having a first plurality of liquid crystal molecules arranged in a first pattern and a second plurality of liquid crystal molecules arranged in a second pattern. The first and the second pattern are separated from each other by a distance of about 20 nm and about 100 nm along a longitudinal or a transverse axis of the liquid crystal layer. The first and the second plurality of liquid crystal molecules are configured as first and second grating structures that can redirect light of visible or infrared wavelengths.

A scanning apparatus and method, the apparatus comprising: a light transmission means (90) having an exit tip; first and second drive means (92,94) for resonantly driving the light transmission means (90) in orthogonal directions; wherein the first and second drive means (92,94) are operable to move the tip in an elliptical pattern while varying the eccentricity of the elliptical pattern, whereby a portion of the elliptical pattern having a centre on the minor axis of the elliptical pattern approximates—at least in appearance—a raster pattern.

A miniaturized scanning system to generate movement of a flexible device positioned at a distal part of a medical tool. The miniaturized scanning system includes an inner shaft with a longitudinal axis, adapted to guide said flexible device along the longitudinal axis, an abutment comprising an external surface and adapted to maintain said device, and a pusher mechanism adapted to engage with said abutment. The miniaturized scanning system includes at least one end portion adapted to contact said external surface of the abutment at a contact point, wherein said end portion is configured to translate along said longitudinal axis of the inner shaft and wherein the translation of said end portion results in a bending of the device in a bending plane defined by the longitudinal axis of the inner shaft and said contact point.

The present invention provides an optical fiber having a rectangular core in which propagation loss of a light beam is small and manufacturing can be performed at low cost, a method of manufacturing the optical fiber, and an image forming apparatus including the optical fiber. The optical fiber having the core, whose sectional shape in a direction orthogonal to an optical axis direction of a light beam becomes rectangular, is formed by: filling a cylindrical tube with multiple hollow capillaries; extracting hollow capillaries located in a rectangular area having a predetermined size in a portion which is substantially central to the tube; inserting rods having the same diameter as the extracted hollow capillaries to replace the hollow capillaries to produce a preform; performing wire drawing while the preform is melt-fused; and covering the preform with a cover layer.

A lighting device (1) includes one or more diode light sources (32), which are configured to emit light into the peripheral edges of a light guide (20). The light guide (20) includes a set of diffusing elements (22) for scattering the emitted light in a plurality of directions out of the front surface of the light guide (20). The diffusing elements (22) are distributed on the light guide (20) so that the scattered light achieves a particular characteristic, e.g., improved uniformity.

An embodiment is directed to an optical element arrangement including at least one optical element. A first optical element includes a fiber and a curved surface. The fiber emits light beams during oscillation at different angular positions relative to a system axis of the first optical element. The curved surface includes an array of lenslets. Each of the lenslets in the array of lenslets is configured to receive light beams from the fiber that are emitted within a particular range of the first curved surface and to collimate the light beams received by the lenslet at a lenslet-specific field angle relative to the system axis. In other embodiments, one or more additional optical elements with respective fibers can be deployed as part of the optical element arrangement, and any of the optical elements in the optical element arrangement may include multiple curved surfaces with respective lenslet arrays.

A photonic chip, an edge coupler for an integrated photonic system and a method for coupling a laser to the photonic chip. The edge coupler includes a waveguide of the photonic system having a longitudinal axis. The longitudinal axis of a waveguide of the photonic chip is aligned with a longitudinal axis of the laser. The facet of the waveguide facing the laser is at a non-perpendicular angle with respect to the longitudinal axis. Light is transmitted from the laser into the waveguide via the angled facet.

A lidar system includes a photonic chip including a light source and a transmit beam coupler to provide an output signal for transmission. The output signal is a frequency modulated continuous wave (FMCW) signal. A transmit beam steering device transmits the output signal from the transmit beam coupler of the photonic chip. A receive beam steering device obtains a reflection of the output signal by a target and provides the reflection as a received signal to a receive beam coupler of the photonic chip. The photonic chip, the transmit beam steering device, and the receive beam steering device are heterogeneously integrated into an optical engine.

A lidar system includes a laser diode to provide a frequency modulated continuous wave (FMCW) signal, and a current source to provide a drive signal that modulates the laser diode. The current source is controlled to pre-distort the drive signal to provide a linear FMCW signal. The lidar system also includes a splitter to split the FMCW signal into an output signal and a local oscillator (LO) signal, a transmit coupler to transmit the output signal, a receive coupler to obtain a received signal based on reflection of the output signal by a target, and a combiner to combine the received signal with the LO signal into first and second combined signals. A first and second photodetector respectively receive the first and second combined signals and output first and second electrical signals from which a beat signal that indicates the pre-distortion needed for the drive signal is obtained.

In order to allow a worker to accurately and repeatedly mark an original plan on a working surface, the present disclosure provides a nonrestrictive drive-type marking system comprising a nonrestrictive drive-type marking device, the nonrestrictive drive-type marking system including an input unit configured to receive data of content to be marked; a marking unit configured to mark the content corresponding to the data on a working surface; a driving unit configured to allow at least a part of the nonrestrictive drive-type marking device comprising the marking unit to nonrestrictively move on the working surface; a position detecting unit configured to sense position information of the nonrestrictive drive-type marking device; and a control unit electrically connected to the input unit, the marking unit, the driving unit, and the position detecting unit, and configured to calculate a current position of the at least the part of the nonrestrictive drive-type marking device comprising the marking unit by comparing the position information with the data, to compare the current position with the data, and if the current position does not match with the data and a degree of mismatch thereof is within a preset range, to move at least a part of the marking unit, and to control the nonrestrictive drive-type marking device to mark the content corresponding to the data on the working surface while the nonrestrictive drive-type marking device moves.