Abstract: There is provided a liquid crystal display device including a liquid crystal display panel and a backlight. The backlight includes a light guide plate with multiple LEDs arranged on a side surface, and a first optical sheet provided on the light guide plate. The first optical sheet has an upper surface, a lower surface, and a side surface on the side of the LEDs. A light shielding area is formed in the side surface of the first optical sheet. By forming the light shielding area, the light from the LED can be prevented from entering the first optical sheet from the side surface. As a result, it is possible to prevent the uneven brightness due to the first optical sheet from occurring in the end portion of the screen.

Abstract: A control circuit of a switching converter includes a current detection comparator for comparing a detection voltage corresponding to a voltage drop of a detection resistor with a reference voltage and generating a peak current detection signal asserted when the detection voltage reaches the reference voltage, a driving logic unit for generating a pulse signal indicating a turn-on/off operation of a switching transistor and changing the pulse signal to an OFF level indicating the turn-off operation of the switching transistor when the peak current detection signal is asserted, a driver for driving the switching transistor based on the pulse signal, and a reference voltage setting unit for measuring time (TRECT) for which a current flows through a secondary coil and a switching period (T) of the switching transistor and adjusting the reference voltage (VREF) according to an equation: VREF=K×T/TRECT where K is a coefficient.

Abstract: There is provided a polarizing plate protective film having, on a substrate film, a layer formed by curing a curable composition containing, setting a total solid content of the curable composition to 100 mass %, from 50 to 99 mass % of the following (A) and from 1 to 30 mass % of the following (B) based on the total solid content: (A) at least either a compound having a cyclic aliphatic hydrocarbon group and an ethylenically unsaturated double bond or a compound having a fluorene ring and an ethylenically unsaturated double bond; and (B) a compound having, in the molecule, at least one of a benzene ring and a cyclohexane ring, and at least one of a hydroxyl group and a carboxy group and the (B) is defined as herein.

Abstract: A liquid crystal display includes a first substrate and a second substrate facing each other, a pixel electrode on the first substrate, a common electrode on the second substrate, and a liquid crystal layer between the first substrate and the second substrate, wherein the common electrode includes a first cutout portion, and the pixel electrode includes a first sub-pixel electrode, a second sub-pixel electrode surrounding the first sub-pixel electrode, a second cutout portion adjacent to at least one of edges of the second sub-pixel electrode and disposed along the edges, and a third cutout portion isolating the first sub-pixel electrode from the second sub-pixel electrode, and the first sub-pixel electrode and the second sub-pixel electrode are located at different heights.

Abstract: A liquid crystal display device includes a TFT substrate, a CF substrate, and a liquid crystal interposed between the TFT substrate and the CF substrate, and drives the liquid crystal in a horizontal electric field. The TFT substrate includes a recess, and the CF substrate includes a columnar protrusion. The protrusion of the CF substrate is fitted to the recess of the TFT substrate so as to function as a stopper for preventing a positional gap between the TFT substrate and the CF substrate.

Abstract: A liquid crystal display includes a first insulating substrate; a gate line and a data line disposed on the first insulating substrate and insulated from each other to cross each other; a thin film transistor connected to the gate line and the data line; an organic layer disposed on the thin film transistor; a pixel electrode disposed on the organic layer; a passivation layer disposed on the pixel electrode; and a common electrode disposed on the passivation layer, in which shapes of the passivation layer and the common electrode correspond to each other in a pixel area. The device reduces a DC bias generated when charges are collected on either the pixel electrode or the common electrode in a display device that displays an image by generating an electric field between two field generating electrodes of the pixel electrode and the common electrode.

Abstract: A liquid crystal display includes: a first substrate and a second substrate facing each other; an alignment layer positioned on at least one of the first substrate and the second substrate; and a liquid crystal layer positioned between the first substrate and the second substrate, wherein the alignment layer includes a main chain and at least one side chain connected to the main chain, the at least one side chain includes at least one kind of vertical alignment side chain and at least two kinds of reaction monomer side chains, the reaction monomer side chains include a main reaction monomer and a sub-reaction monomer, and a length of the main reaction monomer is longer than the length of the sub-reaction monomer. The liquid crystal display provides an excellent pretilt characteristic and improved modulus of the formed polymer, thereby minimizing the afterimage.

Abstract: A liquid crystal device includes a liquid crystal layer, and an inorganic oriented film between the liquid crystal layer and an electrode, in which the inorganic oriented film has a first inorganic oriented film that has a first prismatic structure including silicon oxide, and a second inorganic oriented film that is formed so as to cover at least a portion of the first prismatic structure, and includes nitrogen.

Abstract: A liquid crystal display device includes a first substrate and a second substrate. The first substrate includes a pixel electrode having a contact portion and a main pixel electrode extending in a second direction from the contact portion so as to form one end opposite to the contact portion. The second substrate includes a pair of main common electrodes arranged on both sides sandwiching the main pixel electrode and extending in the second direction. The width of the contact portion in a first direction orthogonally crossing the second direction is larger than the width of the main pixel electrode in the first direction. The main common electrode includes a convex portion provided in a position more apart from the contact portion than the one end of the main pixel electrode and protruding in the first direction.

Abstract: A display apparatus includes a first substrate including a pixel electrode including a first pattern inclined at first and second angles with respect to a center line and a second substrate including a common electrode including a second pattern alternately arranged with the first pattern. The first angle is about +35 degrees to about +45 degrees and the second angle is about ?35 degrees to about ?45 degrees.

Abstract: An eyeglasses for a user as may include an opposing pair of ear support arms to support the eyeglass; an opposing pair of concave lens support portions to connect to the ear support arms to lower the center of gravity of the eyeglass and an opposing pair of lens connected to the concave lens support portions

Abstract: A retainer for eyewear is provided, comprising a rear portion, a front portion, and means for securing the front portion to the rear portion. The rear portion comprises a backing plate having a front surface. The front portion comprises a front piece having a front and back surface, a back piece having a front and back surface, and a bridging piece connecting the front and back pieces at their bottom edges. The bridging piece is biased to force the front surface of the back piece against the back surface of the front piece in a closed position. When the nose bridge of a pair of glasses is inserted between the front and back pieces of the front portion, the front and back pieces temporarily separate and close onto the nose bridge to hold the glasses within the retainer.

Abstract: Described herein are devices, compositions, and methods for improving color discernment.

Abstract: A photochromic polyurethane laminate that is constructed to solve certain manufacturing difficulties involved in the production of plastic photochromic lenses is disclosed. The photochromic laminate includes at least two layers of a resinous material and a photochromic polyurethane layer that is interspersed between the two resinous layers and which contains photochromic compounds. The polyurethane layer is formed by curing a mixture of a solid thermoplastic polyurethane, at least one isocyanate prepolymer, at least one photochromic compound, and a stabilizing system.

Abstract: An ophthalmic lens having a main front face and a main rear face includes: an element for cutting off ultraviolet (UV) light incident on the main front face of the ophthalmic lens; an anti-reflection coating on the main rear face of the ophthalmic lens, having a weighted average reflection factor in the UV region of less than or equal to 7%; and at least one element for at least partially blocking the blue light in the wavelength region from 400 to 460 nanometers, preferably from 420 to 450 nanometers.

Abstract: The present invention discloses a portable pupil detection device with multiband stimulating light and infrared illumination, which comprises at least one pupil detection module for detecting the variation of the pupil of the testee. Each pupil detection module includes an illuminating light source emitting invisible light beams; a stimulating light source emitting visible light beams; at least one beamsplitter corresponding to the illuminating light source, the stimulating light source and an eye of the testee, cooperating with the illuminating light source and the eye to form a first optical path, and cooperating with the stimulating light source and the eye to form a second optical path; a lens corresponding to the beamsplitter and receiving the invisible light beams sent out by the beamsplitter to form an image of the eye; and an imaging element receiving the image of the eye from the lens.

Abstract: A module for use with a mobile device to measure an aberration of a patient's eye includes a light shaft having a proximal end and a distal end. The light shaft includes a first plurality of optical components arranged to direct light along a first light path to the proximal end, and a second plurality of optical components arranged to direct light along a second light path to the distal end. A connector at the distal end includes at least one guide component for positioning the distal end adjacent to a light detector and a light source of the mobile device. When the distal end is positioned adjacent to the light detector and the light source, the first plurality of optical components directs light along the first light path and the second plurality of optical components directs light along the second light path.

Abstract: An information system and a method for providing information in correlation with light that is incident on an eye includes a holographic element disposed in front of the eye and a device capable of recording optical signals which detects light that is incident on the eye via the holographic element. The device capable of recording optical signals detects light which is diffracted by the holographic element before the light impinges on the eye such that the diffracted light does not enter the eye.

Abstract: Provided is an actuator formed in a substrate including a handle layer, an elastic body layer, and an insulating layer, the actuator including a movable portion supported to a support portion by an elastic body, a movable comb electrode formed on the movable portion, a fixed comb electrode supported by the support portion, and electrode wirings connected to the respective comb electrodes in which the elastic body supports the movable portion such that the movable portion is displaceable in a direction perpendicular to the substrate in accordance with voltages applied to the comb electrodes; the comb electrodes are made up of the handle layer, and the elastic body is made up of the elastic body layer; and a handle layer separation groove is provided to electrically separate between the handle layers of the support portions supporting the comb electrodes, and a structure reinforcing portion is formed across the separation groove.

Abstract: In at least one embodiment of the disclosure, an illumination system includes a light source that emits an illumination light flux. A first lens array has a plurality of first small lenses arranged therein. The first small lenses divide the illumination light flux emitted from the light source into a plurality of segmental light fluxes. A second lens array has a plurality of second small lenses arranged therein. The second small lenses have a one-to-one correspondence with the first small lenses and are configured to receive the segmental light fluxes exiting from the first small lenses. At least some of the second small lenses each include a plurality of lens elements disposed in a surface direction that is the same as the second small lenses. A superimposing lens superimposes on an illuminated area the segmental light fluxes exiting from the plurality of second small lenses.

Abstract: Methods, systems, and computer-readable media for generating a projected image are provided. Movement measurements are received from an accelerometer within a projection device. A determination is made as to whether the movement measurements indicate movement of the projection device. Upon determining that the movement measurements indicate movement of the projection device, a movement correction factor is determined based on the movement measurements to compensate for the movement of the projection device. The projection device is caused to generate a projected image according to the movement correction factor.

Abstract: A light source device includes a light source and a phosphor substrate. The phosphor substrate includes a substrate part, a first reflection film, a phosphor substance layer, and a second reflection film. The first reflection film is formed on a first place of the substrate part. The phosphor substance layer is formed on a surface opposite to the substrate part of the first reflection film, and emits fluorescence by light from the light source. The second reflection film is formed on a second place of the substrate part, and reflects the light from the light source. A surface of the phosphor substance layer on which the light from the light source is incident and a surface of the second reflection film from which the light from the light source is reflected are in substantially the same plane.

Abstract: A digital holographic apparatus, system, and method are disclosed. The apparatus includes an electronic display device comprising an interferometric spatial light modulator based display engine and a processor coupled to the electronic display device. The processor is operative to upload digital content to the electronic display device. The digital content is displayed on the electronic display device and is recorded into a holographic medium when the holographic medium and the electronic display device are flood exposed by a laser generated light beam. The system additionally includes at least one laser coupled optically coupled to the electronic display device and communicatively coupled to the processor. A method of recording a digital hologram in a holographic medium using the digital holographic system also is disclosed.

Abstract: A lithographic apparatus including a first body including a heat source, a second body and a heater device is presented. The second body has a facing surface facing the first body via a gap between the first and second bodies. The heat source is for providing a heat flux to the second body via the gap. The heater device is attached to the facing surface. The heater device is configured to provide a further heat flux to the second body.

Abstract: A device serves for controlling temperature of an optical element provided in vacuum atmosphere. The device has a cooling apparatus having a radiational cooling part, arranged apart from the optical element, for cooling the optical element by radiation heat transfer. A controller serves for controlling temperature of the radiational cooling part. Further, the device comprises a heating part for heating the optical element. The heating part is connected to the controller for controlling the temperature of the heating part. The resulting device for controlling temperature in particular can be used with an optical element in a EUV microlithography tool leading to a stable performance of its optics.

Abstract: A system of an extreme ultraviolet lithography (EUVL) is disclosed. The system includes an extreme ultraviolet (EUV) mask with three states. A reflection coefficient is r1, r2 and r3, respectively, wherein r3 is close to (r1+r2)/2. The system also includes a nearly on-axis illumination (ONI) with partial coherence a less than 0.3 to expose the EUV mask to produce diffracted light and non-diffracted light, removing most of the non-diffracted light, and collecting and directing the diffracted light and the not removed non-diffracted light by a projection optics box (POB) to expose a target.

Abstract: A light wavelength conversion module including a substrate, a first light wavelength conversion layer, and a first light transmissive layer is provided. The substrate has a light passing-through area and a first light wavelength conversion area. The first light wavelength conversion layer is located at the first light wavelength conversion area and between the first light transmissive layer and the substrate. The first light wavelength conversion layer is suitable for converting a coherent light beam into a first conversion light beam, wherein wavelengths of the coherent light beam and the first conversion light beam are different from each other. An illumination system and a projection apparatus are also provided.

Abstract: The disclosure relates to an optical arrangement for three-dimensionally patterning a radiation-sensitive material layer, such as a projection exposure apparatus for microlithography. The optical arrangement includes a mask for forming a three-dimensional radiation pattern, a substrate with the radiation-sensitive material layer, and a projection optical unit for imaging the three-dimensional radiation pattern from the mask into the radiation-sensitive material layer. The optical arrangement is designed to compensate for spherical aberrations along the thickness direction of the radiation-sensitive material layer in order to generate a stigmatic image of the three-dimensional radiation pattern.

Abstract: A beam guidance system serves for the focusing guidance of radiation from a high-power laser light source toward a target. The beam guidance system has at least one mirror as reflective beam guidance component and at least one transmission component which is at least partially transmissive to the radiation as refractive beam guidance component. The arrangement of the at least one mirror and of the at least one transmission component is such that beam-induced changes to the beam guidance properties of the at least one mirror are at least partly compensated for by beam-induced changes to the beam guidance properties of the at least one transmission component. This results in a beam guidance system in which beam-induced changes to the beam guidance properties of the beam guidance system do not have a disturbing effect on the focusing guidance of the radiation from the laser light source.

Abstract: A lithography apparatus and device manufacturing methods are disclosed. A lithography apparatus includes a support stage, and a measurement system including a sensor part and a reference part, the measurement system being configured to determine the position and/or orientation of the support stage, or of a component mounted on the support stage, relative to a reference frame by using the sensor part to interact with the reference part, wherein: the reference frame comprises N sub-frames coupled together so as to behave predominantly as a single rigid body with respect to vibrations below a first reference frequency and predominantly as an N-body system with respect to vibrations above a second reference frequency, where N is an integer greater than 1.

Abstract: A stage assembly that moves a device includes a stage that retains the device, a stage mover that moves the stage, a measurement system that provides a measurement signal that relates to the position or movement of the stage, and a control system that control the stage mover. The control system can use an estimator to estimate the position of the stage in the event the measurement signal is lost. Alternatively, the control system can be used to urge the stage against a base assembly when the measurement signal is lost to inhibit the movement of the stage.

Abstract: Some embodiments of the invention relate to a surveying apparatus in the form of a scanner comprising a beam deflection unit, such a beam deflection unit and a measuring method to be carried out with said surveying apparatus. The surveying apparatus comprises a radiation source for generating measurement radiation and a detector for receiving reflected measurement radiation, called reflection radiation for short, which was reflected at an object of interest, wherein measurement radiation and reflection radiation have substantially the same optical path.

Abstract: An apparatus and method for recognizing a vehicle. The apparatus includes a sensor configured to provide point cloud data corresponding to a front object detected by using a LiDAR; a shape determiner configured to determines a shape corresponding to the front object by analyzing the point cloud data provided by the sensor; a receiving sensitivity analyzer configured to analyze a receiving sensitivity change corresponding to each point of the point cloud data provided by the sensor based on the shape of the vehicle; a decider configured to decide whether the front object is a vehicle according to the shape corresponding to the front object and the receiving sensitivity change corresponding to points of the point cloud; and a detector configured to recognize and detect the front object as the vehicle based on the result decided by the decider.

Abstract: A tag for securing to a person or object, comprising at least one fibre optic sensor having a plastics optical fibre that changes optical transmission characteristics with a change in temperature, and a sensor unit coupled to the optical fibre. The sensor unit is configured to detect change in the characteristic of optical transmission. The optical fibre is coupled to a locking strap to extend around a portion of a person or object. A detectable increase in attenuation of light transmitted through the optical fibre may occur when the temperature of the optical fibre is increased from a normal use temperature to at least a threshold temperature, which may be in the vicinity of the softening temperature of the optical fibre. The optical fibre may be used in electronic tags for offender monitoring to ensure the continuity of the strap, and to detect softening and stretching of the optical fibre.

Abstract: A laser based lens analysis device comprising of a laser for emitting a laser beam, a beam expander for increasing the diameter of the laser beam, a beam collimator for collimating the increased diameter laser beam, an aperture for controlling the collimated laser beam and rendering the collimated laser beam to be substantially symmetrical, and a beam profiler for analyzing the laser beam characteristics after the controlled-symmetrical laser beam passes through the lens being tested. A method for lens analysis comprising the steps of emitting a laser beam, increasing the diameter of the laser beam, collimating the increased diameter laser beam, rendering the collimated laser beam substantially symmetrical, directing the symmetrical laser beam towards the lens being tested, and analyzing characteristics of the directed laser beam after the directed laser beam passes through the lens being tested.

Abstract: A system and a method for determining a position and an orientation of an object relative to a defined reference frame is disclosed. A plurality of targets are disposed at known locations relative to the defined reference frame. A head assembly is disposed on the object, where the head assembly includes a plurality of cameras. The head assembly determines the position and the orientation of the object from location data associated with the plurality of targets and image data from the plurality of cameras.

Abstract: A surrogate challenge set including a plurality of containers containing a fluid, wherein at least one of the containers contains particulate matter; and reference probability-of-detection (POD) data for the at least one container containing the particulate matter is described. The fluid may be water containing at least about 0.5 wt % of a preservative, such as benzyl alcohol. The containers may be pharmaceutically acceptable containers such as vials, bottles, syringes, ampules and intravenous bags. The particulate matter may consist of a single particle having a particle size of at least about 50 ?m. A method of making the challenge set may include: disposing particulate matter in at least one of a plurality of containers comprising a fluid; generating probability-of-detection (POD) data for the plurality of containers; and including the probability-of-detection (POD) data in the challenge set. Methods of using the surrogate challenges sets are also provided.

Abstract: Metrology tool stage configurations and respective methods are provided, which comprise a pivoted connection arranged to receive a wafer and enable rotation thereof about a pivot; a radial axis arranged to radially move the rotatable pivoted connection attached thereto; and optics having a stationary part configured to generate a collimated illumination beam. For example, the optics may be stationary and the radial axis may be centrally rotated to enable stage operation without requiring additional space for guiding systems. In another example, a part of the optics may be rotatable, when configured to receive illumination via a mechanically decoupled or empty region, receive power and control wirelessly and deliver data wirelessly. The disclosed configurations provide more compact and more robust stages which efficiently handle large wafers. Stage configurations may be horizontal or vertical, the latter further minimizing the tool's footprint.

Abstract: This application describes designs, implementations, and techniques for controlling propagation mode or modes of light in a common optical path, which may include one or more waveguides, to sense a sample.

Abstract: This invention relates to a method of detecting the transition, between a first compound and a second compound, of a product, which may contain such a first compound and/or such a second compound, and flowing inside a conduit for conveying this product.

Abstract: A method for inspecting the product of a coating process is provided. In certain embodiments, the release of at least one volatile species from the coated surface into the gas space adjacent to the coated surface is measured and the result is compared with the result for at least one reference object measured under the same test conditions. Microbalance weighing methods are also disclosed to detect and distinguish among PECVD coatings. Thus the presence or absence of the coating, and/or a physical and/or chemical property of the coating can be determined. The method is useful for inspecting any coated articles, e.g. vessels. Its application on the inspection of PECVD coatings made from organosilicon precursors, especially of barrier coatings, is also disclosed.

Abstract: A sensor chip capable of reliably combining propagating surface plasmon resonance with localized surface plasmon resonance of metal nanostructures is provided. A sensor chip includes a metal grating. The metal grating includes multiple long metal pieces extending in a first direction. The long metal pieces are arranged at a pitch smaller than the wavelength of an excitation light. A dielectric layer covers the surface of the metal grating. A linear concavo-convex pattern which extends in a second direction intersecting the first direction is formed on the dielectric layer. Metal nanostructures are placed on the surface of the dielectric layer.

Abstract: An apparatus with an electromagnetic radiation source generates an incident-beam. A sample container accommodates a sample, receives the incident beam for interaction with the sample, and enables a scattered beam, which is to be detected, to propagate out of the sample container. An electromagnetic radiation detector detects the scattered beam which is received from the sample container. The sample container is oriented with regard to a direction of the incident beam so that an incident trajectory of the incident beam directly before propagating into the sample container up to a symmetry axis of the sample container is symmetric with a scattered trajectory of the scattered beam, which is to be detected, from the symmetry axis up to a position of the scattered beam directly after having left the sample container, such that the scattered trajectory outside of the sample container is independent of a refraction index of the sample container and of the sample.

Abstract: An object detection method comprises transmitting a plurality of signals from a transmitter into a region; measuring a plurality of signals, each corresponding to a respective one of the plurality of the transmitted signals, received by a sensor; determining whether each of the plurality of received signals satisfies a condition (such as that a received signal is above a threshold level for indicating that an object is located in the region, or below a threshold level for indicating that an object is not located in the region); determining whether noise of at least a threshold amount is present; and determining whether an object is located within the region depending on whether at least a number of received signals meet the condition, the number being different when noise of at least a threshold amount is determined to be present than not present. For example, the required number of received signals that meet the condition when noise is present can be higher than when noise is absent.

Abstract: A resonator fiber optic gyroscope is provided. The resonator fiber optic gyroscope includes a gyroscope resonator, a laser; a clockwise modulator; a clockwise circulator; a clockwise reflection detector; a first-lock-in-amplifier, a clockwise-resonance-tracking servo to receive output from the first-lock-in-amplifier and to provide feedback to the laser to lock the laser to the gyroscope resonator; a clockwise transmission detector to detect an optical beam output from the counter-clockwise input port; a second servo; a second-lock-in-amplifier; and a third-lock-in-amplifier. The first and second lock-in-amplifiers demodulate at the first harmonic of the modulation frequency. The second-lock-in-amplifier demodulates at the second harmonic of the modulation frequency. Either the modulation frequency of the clockwise optical beam is locked to (n+0.5) times the FSR through the second servo, where n is zero or a positive integer, or the FSR is locked to 1/(n+0.

Abstract: The general field of the invention is that of passive resonator gyros comprising an injection laser emitting an initial optical beam at a first frequency and a fibre optic cavity. The gyro according to the invention operates with three optical beams at three different optical frequencies. A first beam is injected in a first direction of rotation, the second and the third beam are injected in the contrary direction. The gyro includes three slaving devices maintaining each optical frequency at a specific mode of resonance of the cavity. The gyro includes means for measuring the frequency differences existing between the different frequencies. Combined together, these differences are representative of the length of the cavity and the angular rotational velocity of the cavity along an axis perpendicular to its plane.

Abstract: A position-measuring device for detecting the position of two objects movable relative to each other, includes a measuring standard that is joined to one of the two objects, as well as a scanning system for scanning the measuring standard, the scanning system being joined to the other of the two objects. The scanning system permits a simultaneous determination of position along a first lateral shift direction and along a vertical shift direction of the objects. To that end, on the part of the scanning system, two scanning beam paths are formed, in which a group of phase-shifted signals is able to be generated in each case at the output end from interfering partial beams of rays. In addition, via the scanning system, at least a third scanning beam path is formed, by which it is possible to determine position along a second lateral shift direction of the objects.

Abstract: A system for positioning a tool relative to a workpiece includes a movable table for accommodating a workpiece, the table executing movements in two main moving directions during the processing of the workpiece, one or more planar measuring standards provided in stationary fashion about the tool and extend in the plane of the main moving directions, and scanning heads, mounted in at least three corners of the table, for detecting the position of the table relative to the measuring standards. The position of the table is determinable by the scanning heads in six degrees of freedom. In at least one of the corners, one or more scanning heads having a total of at least three measuring axes is/are provided for 3-D position detection in three independent spatial directions. The sensitivity vectors of the measuring axes for the 3-D position detection are neither parallel to the X-Z plane nor parallel to the Y-Z plane.

Abstract: The invention relates to an apparatus for the three-dimensional measurement of an object, and comprises a projection system for projecting a pattern onto a surface by means of electromagnetic radiation having at least two different wavelengths or at least two different wavelength ranges; and a detector system for detecting the projected pattern at the at least two different wavelengths or at at least two different respective wavelengths from the at least two different wavelength ranges. The invention further relates to a method for the three-dimensional measurement of an object.

Abstract: An optical position-measuring device includes a measuring standard as well as a scanning unit movable relative to it along at least one measuring direction, a scanning beam path being formed between the measuring standard and scanning unit and being used to generate displacement-dependent signals. A protective cap is disposed in a manner allowing movement along an axis perpendicular to the measuring-standard plane such that in at least one operating mode, the protective cap for the most part surrounds the scanning beam path between the scanning unit and measuring standard.