Abstract:
Methods and apparatus for measuring an electromagnetic radiation response property associated with a substrate (210) and calibrating an electromagnetic measurement device (100) are disclosed. The methods and apparatus generate electromagnetic waves and capture a portion of the generated waves after the waves pass through a first polarized filter (236), reflect from a substrate (210), and pass through a second polarized filter (204) arranged in a cross polar arrangement with respect to the first polarized filter. In addition, the apparatus captures electromagnetic waves that pass through an attenuating filter (206) and reflect from one or more calibration standards (208). Digital data is determined from the captured electromagnetic waves. The digital data is used to recalibrate the apparatus.
Abstract:
An ellipsometry system and method using spectral imaging are provided. The ellipsometry system includes a light source group for projecting a white light collimated to a multi-point region defined on the surface of a sample, a light analysis group for polarizing a reflected white light to analyze it, and a spectral imaging group for dispersing and imaging the polarized white light. The white light collimated to the multi-point region is input to the spectral imaging group and dispersed by a light dispersing means by wavelengths such that the dispersed lights are imaged on one axis of an imaging plane by the points forming the multi-point region and imaged on the other axis of the imaging plane by wavelengths, to obtain optical data having information about the physical property of the points and wavelengths. Accordingly, a large amount of data can be obtained by wavelengths and points to improve rapidity and reliability of measurement.
Abstract:
본 발명은 기준 신호와 함께 다중 파장 광학 신호를 파장에 의해 소정의 상대적 배치를 갖는 스펙트럼 어레이의 기준 스펙트럼 성분 다수의 스펙트럼 채널로 공간적으로 분리하기 위해 회절 격자와 같은 파장 분산 수단을 사용하는 신규의 방법 및 장치를 제공한다. 소정의 위치에서 기준 스펙트럼 성분을 정렬함으로써, 스펙트럼 채널은, 예를 들면 스펙트럼 어레이에 따라 위치된 빔 수신 소자의 어레이 상에서, 지정된 위치로 동시에 충돌한다. 기준 스펙트럼 성분은 서보 제어에 의해 소정의 위치에서 더 유지되고, 이에 의해 지정된 위치에서 스펙트럼 채널이 정렬된 채로 유지되는 것을 보장한다. 본 발명은 스펙트럼 파워 모니터와 광학 멀티플렉서/디멀티플렉서를 포함하는 WDM 광학 네트워킹 어플리케이션용의 새로운 라인의 서보 기반의 광학 시스템을 제공한다.
Abstract:
PURPOSE: An ellipsometer for a fixed incidence surface is provided to reduce measuring time and remove experimental error in a calibration process by preventing a surface direction of a sample from moving and to measure information of reflectance in addition to two variables measured by a general ellipsometer by comparing reflection of a standard sample and a measuring sample. CONSTITUTION: An ellipsometer comprises a light source(100), a polarized light generator(102), a support frame(104) of a sample, a polarized light analyzer(106) and a detector(108). The polarized light generator is rotated by a motor driving apparatus(110). Light from the light source has a specific polarized condition by passing through the polarized light generator. The polarized condition of light is changed again by being reflected on the sample. The polarized light analyzer passes polarized light in a specific direction. Luminosity of light is changed into an electric signal by the detector. The electric signal is evaluated by an A/D converter(112) and a wave form is analyzed by a computer. Consequently, a calibration process is removed and experimental error is removed.
Abstract:
This relates to systems and methods for measuring a concentration and type of substance in a sample at a sampling interface. The systems can include a light source, optics, one or more modulators, a reference, a detector, and a controller. The systems and methods disclosed can be capable of accounting for drift originating from the light source, one or more optics, and the detector by sharing one or more components between different measurement light paths. Additionally, the systems can be capable of differentiating between different types of drift and eliminating erroneous measurements due to stray light with the placement of one or more modulators between the light source and the sample or reference. Furthermore, the systems can be capable of detecting the substance along various locations and depths within the sample by mapping a detector pixel and a microoptics to the location and depth in the sample.
Abstract:
A wavelength tunable filter (200) selectively transmitting light of any desired wavelength within the range of 450 nm to 1100 nm without using a band pass filter is disclosed. The wavelength tunable filter (200) comprises a plurality of polarizers (101a to 101f) and a plurality of units between the adjacent polarizers (101 a to 101f) on a common optical axis (111) in a housing (201). Each unit has, in order from light incident side, a quartz birefringent plate (102), an ultra-wide band 1/4 waveplate (103) and an ultra-wide band 1/2 waveplate (104). The ultra-wide band 1/2 waveplate (104) is accommodated in a cylindrical rotatable body (303; 403; 503) and it is rotated by a rotating mechanism.
Abstract:
A spectrometer (10) for measuring a spectral signature of an object comprises fringe generating optics (12) for use with a camera (65) and a processor. The fringe generating optics are formed of front optics (45) and birefringent optics (55). The front optics comprises a diffuser adapted to receive light from the object. The birefringent optics is adapted to receive light from the diffuser and to generate interference fringes. The camera is adapted to receive the interference fringes and the processor generates the spectral signature of the object. This spectrometer is an improved Fourier transform spectrometer suitable for use with digital cameras, such as cameras found in mobile devices.
Abstract:
A method, system and polarization filter for analyzing polarization properties of light are described, the method comprising: receiving image data from a plurality of image sensor cells, the image sensor cells comprised in an image sensing system; separating from the received image data polarization information and scene image data of a scene being captured; and processing the polarization information to deduce information. Additionally, a polarization filter for analyzing polarization properties of light is described, the polarization filter comprising an array of polarization cells in various directions of polarization, the polarization filter comprising a core array of at least horizontal polarization filter cell, vertical polarization filter cell, no-polarization filter cell and circular polarization filter cell.
Abstract:
An optical device includes a waveplate sandwiched between first and second polarizers and is arranged to receive light emanating from an object or object image that is in motion relative to the optical device. A detector array includes one or more detector elements and is optically coupled to receive light from the second polarizer. Each detector element of the detector array provides an electrical output signal that varies according to intensity of the light received from the second polarizer. The intensity of the light is a function of relative motion of the object or the object image and the optical device and contains spectral information about an object point of the object.