Abstract:
An imaging device and method are provided. Light from an object is provided as a plurality of sets of light beams to a phase difference array having a plurality of elements. The phase difference array is configured to provide different optical paths for light included within at least some of a plurality of sets of light beams. The light from the phase difference array is received at an imaging element array. The imaging element array includes a plurality of imaging elements. Information obtained from hyperspectral imaging data based on output signals of the imaging element array can be displayed.
Abstract:
The invention relates to a device for analyzing and/or generating a polarization state of a measurement point of a target object; the device includes: a polarizer suitable for selecting, in an incident light wave, a light beam which is linearly polarized in a predefined direction; a first birefringent element suitable for having said light beam pass therethrough; a second birefringent element identical to the first element and suitable for having said light beam pass therethrough, said light beam then being directly or indirectly directed toward said object in order to be reflected in the form of a reflected beam. In addition, the optical assembly consisting of one or more optical elements is located in an optical path between the first element and the second element, the optical assembly consisting of: an odd number of mirrors, or, an odd number of half-wave plates, or, an odd number of a mix of mirrors and half-wave plates.
Abstract:
A terahertz ellipsometer, the basic preferred embodiment being a sequential system having a backward wave oscillator (BWO); a first rotatable polarizer that includes a wire grid (WGP1); a rotating polarizer that includes a wire grid (RWGP); a stage (STG) for supporting a sample (S); a rotating retarder (RRET) comprising first (RP), second (RM1), third (RM2) and fourth (RM3) elements; a second rotatable polarizer that includes a wire grid (WGP2); and a Golay cell detector (DET).
Abstract:
A system for measuring the rotation angle of optical active substances (15) has a light source (10), a polarization generation unit (11), a polarization analyzing unit (12), a signal generating unit (13), respectively and electrically coupled to the polarization generation unit (11) and the polarization analyzing unit (12), a signal processing unit (14), electrically coupled to the electric signal generating unit (13), wherein the light source (10) is enabled to emit a beam (100) toward the polarization generation unit (11) for enabling the beam (100) to be polarized into an incident polarized beam (110) while being projected and travelled in an optical path passing through an optical active substance (15) so as to be converted into a emerging beam (150); and the polarization analyzing unit (12) is positioned to receive and analyze the emerging beam (150) so as to generate a signal to be received and processed by the signal processing unit (14).
Abstract:
The invention relates to a device (1) and a method for measuring a magnetization generated within an active medium (10) or characterizing a linearly polarized electromagnetic wave when said active medium exhibits an inverse Cotton-Mouton effect, characterized in that it includes, in combination, at least one of the following elements: an active medium (10) in which a linearly polarized electromagnetic wave propagates; a means (11, 12) for producing a transverse magnetic field B t relative to the propagation direction D 1 of said electromagnetic wave; and a device (2) for measuring the electrical signal appropriate for translating the magnetization generated within said active medium (10) by said electromagnetic wave.
Abstract:
An object identification device includes an image capturing device to capture images polarized in different directions for an object; a noise removal unit to remove noise in the polarized images using a noise removing parameter; an index value computing unit to compute an object identification index value for identification-processing areas in the polarized images using noise removed polarized images data; an object identification processing unit that conducts an object identification by determining identification processing areas corresponding to an identification target object based on the object identification index value; an environment information obtaining unit to obtain environment information of the object; an environmental condition determination unit to determine an environmental condition of the object based on the environment information; and a parameter storage unit to store noise removing parameters prepared for mutually exclusive environmental conditions. The noise removal unit reads a noise removing parameter from the parameter storage unit to conduct a noise removing.
Abstract:
An apparatus and system for use in determining location of a celestial body are presented. The apparatus comprises: a polarizer comprising an array of polarized light filter cells and a light sensor array. The array of polarized light filter cells comprises at least a first polarization direction and a second polarization direction different from said first polarization direction. And the polarizer thereby produces polarized light of at least first and second different polarizations. The light sensor array is configured to receive the polarized light from the polarizer and produce data indicative of a pattern of at least one of light polarization intensity and direction. The pattern is indicative of at least one of azimuth and elevation of the celestial body to be located.
Abstract:
An optical device has the structure to perform switching and attenuation of an optical beam with reduced polarization dependent loss (PDL). The optical device includes a birefringent displacer and two liquid crystal (LC) structures. The first LC structure is used to condition s-polarized components of the optical beam and the second LC structure is used to condition p-polarized components of the optical beam. Each LC structure has a separate control electrode so that the s-polarized components of the optical beam and the p-polarized components of the optical beam can be conditioned differently and in such a manner that reduces PDL. The optical device may be configured for processing multiple input light beams, such as the multiple wavelength channels de-multiplexed from a wavelength division multiplexed (WDM) optical signal.
Abstract:
This invention relates to the manufacture of semiconductor substrates such as wafers and to a method for monitoring the state of polarization incident on a photomask in projection printing using a specially designed polarization monitoring reticle for high numerical aperture lithographic scanners. The reticle measures 25 locations across the slit and is designed for numerical apertures above 0.85. The monitors provide a large polarization dependent signal which is more sensitive to polarization. A double exposure method is also provided using two reticles where the first reticle contains the polarization monitors, clear field reference regions and low dose alignment marks. The second reticle contains the standard alignment marks and labels. For a single exposure method, a tri-PSF low dose alignment mark is used. The reticles also provide for electromagnetic bias wherein each edge is biased depending on that edge's etch depth.