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WO/2021/023642A1 |
Time-domain or frequency domain, in particular swept-source, optical coherence tomography system (1) comprising: a sample light path (2) between a source interface (3) and a detector interface (4), a reference light path (5) between the ...
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WO/2021/024614A1 |
According to the present invention, a measured distance is corrected in accordance with change in the surrounding environment. This distance measurement system is characterized by comprising: a first light-receiving unit in which one p...
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WO/2021/017098A1 |
A differential laser interferometric nanometer displacement measurement apparatus and method employing sinusoidal phase modulation. The method comprises: converting, by means of a polarizer (2), a light beam outputted by a single-frequen...
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WO/2021/020604A1 |
The present invention relates to a measurement apparatus and a measurement method for the thickness and the refractive index of a multi-layer thin film, using an angle-resolved spectral interference image according to polarization. More ...
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WO/2021/019136A1 |
A device (1) for inspecting a surface (S) of an object, the device comprising a polychromatic light source (20) for projecting an inspection beam onto the surface (S); a confocal mask (6a, 6b) intercepting the inspection beam and a beam ...
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WO/2021/020603A1 |
The present invention relates to a shape measurement system and method using an ultrafast deflection measurement method using a composite pattern. More particularly, the present invention relates to a shape measurement system using an ul...
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WO/2021/022119A1 |
An optical system includes a collimated light source, a beam splitter, two mirrors and two lenses, a focus lens, and a detector. An initial light beam is generated by the light source and then separated by the beam splitter into a first ...
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WO/2021/013747A1 |
An optical device and system for sensing a surface profile of an object by means of interferometric distance measurement, comprising a beam splitter (3) for splitting a light beam (84) of a light source (7) into a first sub-beam (410) an...
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WO/2021/016096A1 |
An optical system includes an incident beam divider structured to divide an incident beam into multiple derivative beams having varying polarizations. The optical system further includes a beam splitter structured to reflect and transmit...
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WO/2021/009723A1 |
Optical system comprising an input optical field-splitting means, a first pupil splitting means and a first hole-reflector arranged to channel or direct a back-reflected optical field to a detection or collection area from a sample to be...
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WO/2021/004709A1 |
The invention provides a method for calibrating a mirror of an interferometer system configured to measure a position of an object using two interferometers of the interferometer system that are arranged at opposite sides of the object a...
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WO/2021/003444A2 |
3D metrology techniques are disclosed for determining a changing topography of a substrate processed in an additive manufacturing system. Techniques include fringe scanning, simultaneous fringe projections, interferometry, and x-ray imag...
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WO/2021/003256A1 |
A processing machine (10) for building an object (11) from powder particles (12) includes a build platform (26), an excitation system (21) and an electron beam irradiation device (22). The build platform (26) includes a support surface (...
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WO/2020/261235A1 |
An optical device includes two prisms and a beamsplitter configuration. A first of the prisms has a first surface associated with a source and a second surface oblique to the first surface. A second of the prisms has a first surface asso...
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WO/2020/262460A1 |
This optical sensor (1) comprises a metal base section (10) formed in a cylindrical shape, an optical fiber member (20) inserted into the interior of the base section (10), and a sensor head (30) that is formed from single crystal alumin...
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WO/2020/257711A1 |
Aspects of the present disclosure provide improved techniques for imaging a subject's retina fundus. Some aspects relate to an imaging apparatus that may be substantially binocular shaped and/or may house multiple imaging devices configu...
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WO/2020/257450A1 |
Methods, apparatus and systems for testing an optical element are described. One example device for measuring a test optical component includes a pre-conditioning optical module positioned to receive an optical beam from a light source a...
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WO/2020/249540A1 |
The invention relates to a method for determining a length L and/or a change in the length L of a measurement path between a first measurement point 4 and a second measurement point 8 by interferometry, wherein a control light beam is tr...
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WO/2020/249339A1 |
The invention provides an interferometer system to determine a position of a movable object, comprising: a laser source to provide a radiation beam, an optical system arranged to split the radiation beam into a first beam along a first o...
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WO/2020/246788A1 |
The present invention relates to a scanning hologram-based automatic optical inspection apparatus and method. The automatic optical inspection apparatus comprises: a hologram image-capturing unit which captures an image of a hologram of ...
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WO/2020/246015A1 |
The purpose of the present invention is to provide a technique for automatically correcting a phase difference during inspection by analyzing the influence of the phase difference while shifting the position of a birefringent element. An...
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WO/2020/245511A1 |
The invention relates to a method and device (1) for measuring the shape of an interface (103) of an optical element (1000) comprising a plurality of interfaces, the device (1) comprising: measurement means (4000, 6000, 7000) with at lea...
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WO/2020/245413A1 |
A laser interferometer configured to provide position information relating to a reflective surface, the laser interferometer comprising: a laser source, a photodetector, a signal processor and an optical defocusing element having a first...
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WO/2020/244937A1 |
A measuring apparatus (10) for interferometrically determining a shape of an optical surface (12) of a test object (14) comprises a diffractive optical module (24) for generating a test wave (26), which is directed at the optical surface...
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WO/2020/240541A1 |
The present invention discloses a technique having an off-axis interferometric geometry that is capable of spatially multiplexing at least six complex wavefronts, while using the same number of camera pixels typically needed for a single...
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WO/2020/239770A1 |
The invention relates to an interferometric measurement device and to an interferometric method for determining the surface topography of a measurement object (1). The essence of the invention is that the light intensities Iq(zi) of at l...
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WO/2020/241584A1 |
This optical interferometer reduces noise in interferograms in optical interferometry. This optical interferometer (1) is characterized by being provided with a measurement unit (2) which irradiates a measurement target and a reference s...
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WO/2020/243670A1 |
This device allows one to measure seismic activity from a hand-held device, in particular a mobile phone. A microfabricated whispering gallery mode (WGM) based seismometer operates in conjunction with an application installed on a mobile...
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WO/2020/241583A1 |
Provided is light interference measurement technology that improves depth-direction intensity profile resolution without using a wideband light source. A light interference measurement device (1) comprises a measurement unit (2) for acqu...
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WO/2020/240499A1 |
An image acquisition and processing apparatus (1) to determine a physical property of a product (2) movable along an advancement direction (A) comprises: - a source of electromagnetic radiation (9) arranged to generate a beam of electrom...
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WO/2020/239162A1 |
The invention relates to a device for generating a synthetic wave length comprising at least two surface emitters and a support element, the support element is a heat conductor and both surface emitters are securely arranged in or on the...
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WO/2020/237584A1 |
An OCT imaging apparatus suitable for multiple optical paths, comprising a reference light input interface, a reference light output interface, a 1×N level photoelectric switch, an N×1 coupler, and N optical paths (L1, L2, L3) formed b...
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WO/2020/231867A1 |
Surface changes are estimated using multiple speckle interferograms acquired using beams incident at different angles. Beam irradiation conditions can be changed to increase signal to noise ratio with averaging, such as weighted averagin...
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WO/2020/227632A1 |
The Direct Detection technique uses a Fabry -Perot interferometer to determine the Doppler shifts in the LIDAR return. The detection approaches include either the edge technique which uses narrow band filters to transform the shift into ...
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WO/2020/227698A1 |
The present invention provides an optical imaging system having an optical module to project the light onto the sample evenly and effectively. In addition, the present invention provides a method to eliminate image artifacts and improve ...
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WO/2020/216638A1 |
A method for measuring an amount of light that is back-scattered by an optical instrument (1) comprises using the optical instrument as reflector for an interferometer (10). Variations are applied to an instantaneous position of the opti...
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WO/2020/217606A1 |
This interference image imaging device has a first part (8) which includes a first optical member (21) and a second optical member (22) and which causes a first luminous flux (7) to transmit therethrough and causes a change of the orient...
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WO/2020/217448A1 |
This interference image imaging device (100) has: a first part (8) which includes a first optical member (21) and a second optical member (22) and which causes a first luminous flux (7) to transmit therethrough and causes a change of the...
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WO/2020/214438A1 |
A detector system for Fourier spectroscopy such as a spectral domain optical coherence tomography instrument includes a diffractive optic for diffracting the interfering light into angularly dispersed wavenumbers, a prism for reduces a n...
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WO/2020/214444A1 |
Embodiments of the present disclosure relate to measurement systems and methods for diffracting light. The measurement system includes a stage, an optical arm, and one or more detector arms. The method of diffracting light includes a met...
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WO/2020/210875A1 |
A wear sensing liner for a comminution apparatus. The wear sensing liner comprising: a liner body comprising; a wear surface side defining a wear surface; and an opposed, operatively rear surface side; and at least one sensor carried by ...
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WO/2020/208633A1 |
A system comprising: at least one hardware processor; and a non-transitory computer- readable storage medium having stored thereon program instructions, the program instructions executable by the at least one hardware processor to: recei...
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WO/2020/208180A1 |
The present invention relates to a method for examining a coating of a probe surface, comprising the steps of providing (41) sensing data indicative of a depth of the coating at each of a predetermined subset of probe surface points, det...
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WO/2020/210679A1 |
Alignment of a 2D image to a corresponding 3D image is provided by writing a pattern into a 3D sample, The pattern is at known positions in the 3D image, and provides visible reference features in the 2D image. This permits accurate dete...
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WO/2020/202547A1 |
This optical distance measurement device (100, 100a) comprises: a splitting unit (103) that splits laser light to output the same as measurement light and reference light; a measurement light splitting unit (104) that splits the measurem...
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WO/2020/201486A1 |
A tunable laser (101) comprising a gain medium (144), wherein the optical tunable filter (150) includes: applying the voltage difference for one or more consecutive driving time interval, each lasting less than 1 ps, varying the voltage ...
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WO/2020/201481A1 |
The present invention relates to an optical coherence tomography analysis method, comprising: Providing a Swept Source Optical Coherence Tomography system (SS-OCT), the SS-OCT system including: ° a light source, tunable over a spectral ...
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WO/2020/201190A1 |
The invention relates to a testing device (1) for measuring the homogeneity of an optical element (10) in a beam path (5) of the testing device, the testing device containing an interferometer (2), which comprises a monochromatic light s...
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WO/2020/204817A1 |
A non-contact non-destructive testing method includes spatially and/or temporally controlling a laser excitation light based on a predetermined pattern. The laser excitation light is projected onto a surface of a test object to generate ...
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WO/2020/198562A1 |
Handheld optical imaging devices and methods are disclosed herein. In an embodiment, an optical coherence tomography (OCT) system includes an OCT probe that is configured as a hand-held probe for imaging an eye of a patient, the OCT prob...
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