64 results about "Transformation optics" patented technology

The present invention provides a system and method for controlling one or more light-emitting elements which are driven by forward currents to generate mixed light for use, for example, through a luminaire. The system has one or more light sensors for acquiring feedback optical sensor data and a user interface for providing reference data representative of a desired mixed light. The system also has a controller for transforming either the sensor data or the reference data into the coordinate space of the other and to determine a difference between the sensor and the reference data in that coordinate space. The controller is configured to adjust the forward currents during operating conditions so that the sensor data matches the setpoint data. The present invention also provides a system and method that can at least partially compensate certain temperature induced effects when transforming the optical sensor or the reference data.

The invention discloses an integrated design of a device with a three-dimensional all-medium non-resonant metamaterial structure and a manufacturing process. In the invention, the transform optics and the effective-medium theory are taken as the base, crisscrossed columns and diamond unit cells are used as a structure unit to be designed, and then the three-dimensional full-medium metamaterial structure with super broadband, low loss, easiness in three-dimensional expansion and the like is obtained; a photocuring rapid prototyping process is adopted for realizing the integrated design and themanufacture of the all-medium non-resonant three-dimensional metamaterial structure at a microwave frequency band (GHz); and a set of process method of integrated design and the manufacture of microscopic unit organizations and macroscopic three-dimensional structures for microwave invisible devices is set up.

The invention relates to a beam combining device and a beam combining method for a Bragg grating external cavity laser module. The beam combining device comprises a plurality of light emitting moduleswhich are arranged side by side; wavelength locking is carried out by adopting a Bragg grating; output light is transmitted to a beam combining element for beam combining after passing through a focusing optical element; under the action of a light splitting element, one part of the beam combining light is reflected, one part of the beam combining light is transmitted, and one part of the beam combining light is incident on a dispersion element by a diffraction angle of the dispersion element, and parallel light is formed under the action of a conversion optical element; finally image blocksof light beams corresponding to the light-emitting modules in wavelength are formed on an image acquisition mechanism; whether the wavelengths of the corresponding light-emitting modules are locked ornot is judged through whether deviations exist between the image blocks formed by the light-emitting modules on the image acquisition mechanism and a preset image block or not, so that the problem that the light beam quality of the beam combining device is relatively low because an existing beam combining device with the light emitting modules cannot be used for judging and detecting wavelength locking is effectively solved; and the beam combining device is simple in structure, rapid in judgment and detection and convenient to adjust.

The invention discloses a wide angle scanning ellipsoidal dielectric lens antenna based on phased array feed applied to a wide-angle scanning and multi-beam directional communication system. Its basicstructure consists of an elliptical dielectric lens with five layers of dielectric and a 1*9 phased array with a microstrip patch as elements. The lens antenna is compressed in thickness by conversion optics, keeps the focusing performance of the original spherical Luneberg lens; at the same time, the antenna is easy to process because the dielectric constant range is controlled; according to thesuperposition algorithm of element patterns, he element amplitude and phase of the phased array are optimized, so that the accurate wide-angle scanning is realized, and the gain is improved comparedwith the phased array. The application of the phased array fed lens antenna in the lower profile and wide-angle scanning is better solved, and it can play a better role in the multi-beam directional communication and wide-angle scanning system. Based on the basic structure of the invention, other specific embodiments of the invention can be formed by reasonably changing the filling medium type, antenna size, feed unit form and array arrangement mode.

(Problem to be solved) To provide a laser beam synthesizing apparatus which is small in size and high in output power.(Means for solving the problem) A convergent angle transforming optical system 30 is disposed further upstream of the upstream-most position Pa in the positions where the optical axes of beam bundles La, Lb, Lc . . . which are radiated from a plurality of semiconductor lasers 11A, 11B, 112C . . . and converged in the fast axis view by a converging / dispersion lens 120 intersect each other in the fast axis view, and the whole beam bundle made up of the beam bundles La, Lb, Lc . . . passed through the converging / dispersion lens 120 is converged in the fast axis view by the convergent angle transforming optical system 30 so that the angle of convergence of the whole beam bundle is made smaller in the fast axis view, and introduced into the core 41 of an optical fiber 40.

The invention discloses a 5G massive MIMO luneberg lens antenna applied to a low frequency band. The 5G massive MIMO luneberg lens antenna comprises a spherical or ellipsoidal artificial dielectric lens, N groups of + / -45-degree cross polarization feed sources which are arranged on the back surface of the artificial dielectric lens, and P groups of radio frequency TR components which are placed onthe back surfaces of the reflecting plates of the feed sources for realizing signal transceiving, wherein P is less than or equal to N. The 5G massive MIMO luneberg lens antenna further comprises P groups of switch matrixes which are respectively and correspondingly connected with the radio frequency TR components and are used for realizing beam forming, P groups of channel analog-to-digital components which are correspondingly connected with the switch matrixes, and P groups of data stream encoders which are respectively and correspondingly connected with the channel analog-to-digital components and are used for realizing channel digital precoding. The multi-beam high-gain Luneberg lens antenna is realized in the field of 5G mobile communication in a low-frequency band (698 to 960MHz frequency band) through conversion optics, and the problems of long wavelength, large size, high cost and difficulty in realizing massive MIMO when a traditional plate-shaped antenna is applied to the low-frequency band are solved.

In an inspection system for planar objects having periodic structures, programmable optical Fourier filtering in the focal plane of a telecentric lens system is used to directly identify physical phenomena indicative of non-periodic defects. Lens assemblies and a coherent optical source are used to generate and observe a spatial Fourier transform of a periodic structure in the Fourier plane. Optical Fourier filtering (OFF) is performed in the focal plane using an electrically programmable and electrically alignable spatial light modulator. The spatial light modulator with high signal to noise ratio is electrically reconfigurable according to a feedback-driven, filter construction and alignment algorithm. The OFF enhances any non-periodic components present in the Fourier plane and final image plane of the object. A system having a plurality of inspection channels provides high-throughput inspection of objects with small non-periodic defects while maintaining high detection sensitivity.

The present invention relates to an optical head unit and an optical disk unit using the optical head unit. The head unit includes a wavefront transforming optical element control unit to controls a wavefront transforming optical element so as not to transform wavefront of a light beam focused on a recording layer by a focusing unit due to the thickness error of a light transmission layer positioned between the recording layer and the focusing unit based on an electrical signal outputted from a first light detector, and an output control unit that controls light amount of a light beam radiated by a light emitting unit based on the magnitude of the electrical signal outputted from the light detector.

An LCD backlight has a light source that emits a laser light, a lens, a mirror, a rotary polygon mirror, a scanning lens and a return mirror constituting a transforming optical system that transforms the laser light from the light source to a linear light. A light guiding plate allows the linear light to enter and emits two-dimensional light in the horizontal direction. An emission end face of the light source is disposed in a rear face side of the light guiding plate so that a surface normal line thereof is in the horizontal direction or is inclined downward from the horizontal direction. The lens, mirror and scanning lens are disposed in the rear face side of the light guiding plate, so that surface normal lines of the light transmission surface and light reflection surface thereof are all in the horizontal direction or are inclined downward from the horizontal direction.

This invention provides a boric acid crystals that is useful to make wavelength conversion optical element and the like, which is made by dissolving water-soluble original material in water to make solution, evaporating water from the solution, either through sintering or not, to make culture material, and then fusing such culture material to make boric acid crystals. As a result, the boric acid crystals can be obtained simply in short time with low cost and further with excellent homogeneity and reliability. Also, this invention provides a laser oscillation apparatus with high reliability by using such crystals as wavelength conversion optical element.

An illumination source apparatus (500), suitable for use in a metrology apparatus for the characterization of a structure on a substrate, the illumination source apparatus comprising: a high harmonic generation, HHG, medium (502); a pump radiation source (506) operable to emit a beam of pump radiation (508); and adjustable transformation optics (510) configured to adjustably transform the transverse spatial profile of the beam of pump radiation to produce a transformed beam (518) such that relative to the centre axis of the transformed beam, a central region of the transformed beam has substantially zero intensity and an outer region which is radially outwards from the centre axis of the transformed beam has a non-zero intensity, wherein the transformed beam is arranged to excite the HHG medium so as to generate high harmonic radiation (540), wherein the location of said outer region is dependent on an adjustment setting of the adjustable transformation optics.