Abstract:
A method of controlling a spectroscopic module that includes a measurement light source, a variable-wavelength optical filter, a photodiode, and a conversion circuit for converting a drive signal voltage into a gap displacement amount. The spectroscopic module has a reference light source for emitting a reference light beam of a known wavelength. The controlling method involves varying a gap for the incident reference light beam, extracting two maximum points among data output from the photodiode, and updating a first conversion formula provided in the conversion circuit through use of drive signal voltages and gap amounts corresponding to the two points.
Abstract:
A small size, robust stimulated Raman scattering (SRS) spectrophotometer system for industrial, medical and field use, exhibiting high SNR, high resolution and very short acquisition times. The architecture of the system allowing for such features comprises three main elements: (1). Use of a narrow range tunable pump laser and an array of fixed wavelength lasers to produce the wavelength differences as required to generate the SRS (Raman) spectrum; (2). Application of analog signal processing, prior to the digital conversion, in order to obtain higher resolution and SNR; (3). Use of relatively inaccurate or unstable laser sources coupled to calibration samples, followed by various calibration methods to compensate for system instabilities, such as wavelength drift, laser inaccuracies, and variations in the optical components/elements of the system.
Abstract:
An optical system for a multidetector array spectrophotometer includes multiple light sources (10,12) for emitting light of selected wavelength ranges and means for selectively transmitting the selected wavelength ranges of light to respective slits (40,42) of a multi-slit spectrograph for multiple wavelength range detection. The spectrograph has two or more slits (40,42) which direct the selected wavelength ranges of the light spectra to fall upon a dispersive and focusing system which collects light from each slit, disperses the light by wavelength and refocuses the light at the positions of a single set of detectors (46).
Abstract:
본 발명은 측정 대상으로부터 발사된 측정광을 고정 미러부와 가동 미러부에 입사시켜, 상기 고정 미러부에 의해서 반사된 측정광과 상기 가동 미러부에 의해서 반사된 측정광의 간섭광을 형성한다. 이때, 상기 가동 미러부를 이동시킴으로써 측정광의 간섭광 강도 변화를 얻고, 이 변화에 기초하여 측정광의 인터페로그램을 구한다. 또, 동시에, 측정광의 파장 대역의 일부인 협대역의 파장의 참조광을, 상기 고정 미러부와 상기 가동 미러부에 입사시켜, 그 고정 미러부에 의해서 반사된 참조광과 그 가동 미러부에 의해서 반사된 참조광의 간섭광을 형성한다. 이때, 상기 가동 미러부를 이동시킴으로써 참조광의 간섭광 강도 변화의 진폭, 및 상기 측정광 중 상기 참조광과 같은 파장의 측정광과 상기 참조광의 위상차에 기초하여 상기 측정광의 인터페로그램을 보정하고, 보정 후의 인터페로그램에 기초하여 상기 측정광의 스펙트럼을 구한다.
Abstract:
Embodiments described herein include broadband light source system comprising an optic coupler including a plurality of input branches coupled to an output. The system includes a plurality of light sources coupled to the plurality of input branches. Each light source outputs light having a different wavelength distribution than any other light source of the plurality of light sources. The output emits a broadband light source comprising a combined spectral output of the plurality of light sources.
Abstract:
This invention relates to a source for emitting radiation in the infrared range comprising a thin membrane including a radiation element (2) made from a semi-conductive material having a chosen dopant, the radiation element being connected to a frame (8), the frame comprising connector means (6a, 6b) for connecting to a power source for conducting an electrical current through the substrate, the radiation element being provided with a periodic modulation of the refractive index constituting a photonic crystal having a chosen period, thus defining an optical resonator at one or more chosen wavelengths, and wherein the membrane is mounted to the substrate through a number of conductor beams (5a, 5b) distributed along the membrane circumference so as to provide an even current distribution and thus even heating over the membrane.
Abstract:
The present invention relates to the multispectral imaging of samples, in particular of biological tissues. The invention further relates to a method for acquisition of fluorescence and reflectance images of an object (400) comprising the steps of alternatingly illuminating the object (400) with at least a first light having several spectral regions of high intensity, wherein the first light has at least one region of low intensity that is of longer wavelength to a region of high intensity, and at least a second light having at least one spectral region of high intensity, recording a first image of the object during illumination of the object with the first light and a second image of the object during illumination of the object with the second light using a common sensor array (200), wherein the light recorded by the sensor array (200) is attenuated in at least one of the spectral regions in which the first light has high intensities.