Abstract:
A system and process for automatically characterizing a plurality of external cavity semiconductor laser chips on a semiconductor laser bar separated from a semiconductor wafer. The system includes a diffraction grating mounted on a rotary stage for rotating the diffraction grating through a range of diffraction angles; a steering mirror mounted on the rotary stage and oriented perpendicular to a surface of the diffraction grating; and a laser analyzer; and a laser bar positioning stage. The positioning stage is automatically moved to aligning each laser chip in a laser bar on the stage, one chip at a time, with the diffraction grating, such that a part of the laser beam emitted from a laser chip in a laser bar is reflected back to the same laser chip by the 1st order diffraction of the grating to lock the lasing wavelength and the rest of the laser beam reflected by the steering mirror is received and characterized by the laser analyzer. For each laser ship, the rotary stage is automatically rotated to rotate the diffraction grating through a range of diffraction angles relative the laser beam emitted by the laser chip, and the laser analyzer automatically characterizes the laser optical properties such as spectra, power, or spatial modes at each diffraction angle.
Abstract:
A low-cost optics, broadband, astigmatism-corrected practical spectrometer. An off-the-shelf cylindrical lens is used to remove astigmatism over the full bandwidth, providing better than 0.1 nm spectral resolution and more than 50% throughput over a bandwidth of 400 nm centered at 800 nm. The spectrometer includes a first spherical mirror disposed along an optical path in an off-axis (tilted) orientation; a diffraction grating disposed along the optical axis in a location optically downstream from the first mirror; a second spherical mirror disposed along the optical path in an off-axis orientation in a location optically downstream from the diffraction grating; a cylindrical optic disposed in the optical path; and a detector disposed in the optical path in a location optically downstream from the second spherical mirror.
Abstract:
The present invention discloses a spectrometer comprising: - an entrance aperture, a collimator, intended to produce, from a light source, a collimated input light (5), a plurality of gratings arranged in a 2-D matrix, a plurality of detectors, and - an exit aperture.
Abstract:
본 발명은 회절 격자의 교체나 관측 부분의 동작 없이도 인가되는 광의 파장에 대해 최상의 효율을 제공하도록 한 파장 가변 분광계 및 그 파장 가변 방법에 관한 것으로, 이를 위하여 관측할 외부 광원의 파장에 대해 최적 효율을 제공하는 입사각을 제공하도록 투과형 회절판을 회전 가능하도록 구성하고, 투과형 회절판의 회전과 입사광의 파장에 따라 회절 각도가 변화되는 광을 회절판의 회전과 입사광의 파장 변화에 무관하게 항상 동일 출력 경로로 광을 제공하는 거울을 배치하도록 함으로써, 관측을 위한 카메라의 움직임이나 회절판의 교체 없이도 항상 입사광의 파장에 따른 최적 회절 효율로 입사광의 스펙트럼을 획득할 수 있어 분광계의 크기를 줄이고, 비용을 줄이며, 고장 가능성을 줄일 수 있는 효과가 있다.
Abstract:
A method of manufacturing a microfluidic device having at least one cylindrical microchannel (32) includes providing a substrate (12), casting an uncured polymer matrix solution. (LO) onto the substrate, embedding an elongated rod (14) in the uncured polymer matrix solution, curing the polymer matrix solution to form a solidified body, and extracting the elongated rod to form the cylindrical microchannel. in. the solidified body. In. another embodiment, the method includes forming an optical feature on a surface of the microfluidic device. A microfluidic device is also provided, the device including a polymer body, and at least one cylindrical microchannel in the polymer body, the cylindrical microchannel having1 a diameter between approximately 40?m and 250?m, inclusive. An additional microfluidic device is provided that functions' as an optsfluidic spectrometer. The optofluidic spectrometer includes a polymer body, a diffraction grating integrated, within. the palymer _ body, and. a cylindrical micrsdianpel bebipd the- diffraction., grating on the polymer body.
Abstract:
A method of manufacturing a microfluidic device having at least one cylindrical microchannel includes providing a substrate, casting an uncured polymer matrix solution onto the substrate, embedding an elongated rod in the uncured polymer matrix solution, curing the polymer matrix solution to form a solidified body, and extracting the elongated rod to form the cylindrical microchannel in the solidified body. In another embodiment, the method includes forming an optical feature on a surface of the microfluidic device. A microfluidic device is also provided, the device including a polymer body, and at least one cylindrical microchannel in the polymer body, the cylindrical microchannel having a diameter between approximately 40?m and 250?m, inclusive. An additional microfluidic device is provided that functions as an optofluidic spectrometer. The optofluidic spectrometer includes a polymer body, a diffraction grating integrated within the polymer body, and a cylindrical microchannel behind the diffraction grating on the polymer body.
Abstract:
Die Erfindung betrifft eine hochempfindliche spektralanalytische Einheit mit einem Beugungsgitter, bei der ein paralleles Lichtbündel (1, 2, 3), welches einen Wellenlängenbereich aufweist, auf ein Beugungsgitter (13) einfällt, welches die unterschiedlichen Wellenlängen durch Beugung in erste Richtungen spektral aufspaltet und Wellenlängenteilbereiche des spektral aufgespalteten Lichtbündels (1', 1", 1'", 2', 2", 2'", 3', 3", 3'") durch eine Kameraoptik (14) auf eine Detektorzeile (15) fokussierbar sind und eine Auswerteelektronik (17) an die Detektorzeile (15) angeschlossen ist, welche das erzeugte Spektrum als Information gewinnt und darstellt. Die Erfindung ist dadurch gekennzeichnet, daß das Lichtbündel (1, 2, 3) ein erstes optisches Element (11, 20) passiert, dann Wellenlängenteilbereiche eines spektral aufgespalteten Lichtbündels (1', 1", 1'", 2', 2", 2'", 3', 3", 3'") jeweils auf Teilgebiete (13', 13", 13'") eines Beugungsgitters (13) treffen, wobei das Beugungsgitter (13) über alle Teilbereiche eine gleiche Gitterkonstante und eine sich ändernde Profilform hat, wobei die Profilformen unterschiedliche Blazewellenlängen erzeugen, die in den jeweiligen Wellenlängenteilbereichen liegen.
Abstract:
A Fabry-Perot cavity filter includes a first mirror and a second mirror. A gap between the first and the second mirror monotonically varies as a function of width of the filter. This filter may be used with photodetector and a channel selection filter in an optical device, such as a spectrum analyzer. The channel selection filter may be a metal nanooptic filter array which includes plurality of subwavelength apertures in a metal film or between metal islands.
Abstract:
A spectroscopic detector includes means for illuminating a first substance and another substance or substances present with electromagnetic radiation at a plurality of wavelengths to thereby induce the emission of radiation; means for measuring the emitted radiation at a plurality of emission wavelengths to obtain a plurality of spectral measurement data; and a processor for processing the spectral measurement data, where the processor includes a multispectral data processing algorithm or is configured for 1) combining the plurality of spectral measurement data into a composite spectrum, and 2) applying the algorithm to the composite spectrum. The spectra such as resonant and near-resonant Raman Spectra that are acquired are more complete and contain more information. A powerful multispectral analysis code such as IHPS, CHOMPS, or ENN analyzes the acquired data points, examining details of the spectra that could not be handled by traditional methods.