86 results about "Fiber-Optic Spectroscopy" patented technology

The invention relates to a radiation spectrum measurement system of the sky polarized light, belonging to the optical electron testing technology field, which is applicable to measuring the sky polarized light and spatial and temporal distribution analysis. The measurement system is consisted of a polarization measurement head, a telescopic optical system, a fiber spectrometer system and a computer. Arranging the polarization measurement head comprises: arranging a cylindrical rotary head on the inside of an interface (1); screwing down a ding screw; then putting a wafer-shaped polarizer in the lumen of the rotary head; using an annular pressing ring to compress and fix the polarizer on the rotary head via two bolts. An equatorial is arranged on an A-frame. Then a refractor is arranged above the equatorial. The back-end of anti-ultraviolet optical fiber is connected on a spectrograph. Then a cosine corrector is arranged on the front-end of the anti-ultraviolet optical fiber. And then the probe-end of the cosine corrector is inserted into an interface (2) and the ding screw is screwed down. The system is provided with strong currency, wide application range and convenient operation.

A modification to a commercial Fourier Transform (FT) Raman spectrometer is presented for the elimination of thermal backgrounds in the FT Raman spectra. The modification involves the use of a mechanical optical chopper to modulate the continuous wave laser, remote collection of the signal via fiber optics, and connection of a dual-phase digital-signal-processor (DSP) lock-in amplifier between the detector and the spectrometer's collection electronics to demodulate and filter the optical signals. The resulting Modulated Fourier Transform Raman Fiber-Optic Spectrometer is capable of completely eliminating thermal backgrounds at temperatures exceeding 300 DEG C.

The invention discloses an in-situ measurement device and a measurement method of a scattering coefficient spectrum of an atmospheric aerosol. The measurement device comprises an integrating sphere, a solar simulator, a fiber spectrometer and a computer, wherein an internal reflectance coating of the integrating sphere is made from polytetrafluoroethylene, and collection efficiency of the scattered light is improved based on the advantage of truncated corners of the internal reflectance coating, so that the sensitivity in the measurement of the scattering coefficient spectrum is effectively strengthened. In the device and the method, a measure equation for the scattering coefficient spectrum in a wave range from 350 nm to 1000 nm is established, so that the difference of conversion responsivity caused by the difference of the wavelength in a photoelectric conversion process can be effectively avoided. The device and the method can detect evolution rules of the scattering coefficient spectrum of the atmospheric aerosol with the temperature, the humidity and the atmospheric pressure, and have the characteristics of being simple in principle, convenient in operation and fast in detection speed.

The invention discloses an optical fiber type sensor system based on surface plasma resonance and stimulated Raman scattering. The system comprises a broadband light source, a P-type polaroid, a focusing convex lens, a polarization controller, an optical fiber beam splitter, an optical fiber inclined end, a surface plasma resonance (SPR) probe and an optical fiber spectrometer, wherein the P-type polaroid is positioned between the broadband light source and the focusing convex lens; the focusing convex lens optically couples the polarization broadband to the polarization controller; the polarization controller is connected with one input end of the optical fiber beam splitter, and the optical fiber spectrometer is connected with the other input end of the optical fiber beam splitter; the optical fiber inclined end is connected with one output end of the optical fiber beam splitter, and the SPR probe is connected with the other output end of the optical fiber beam splitter; the free end of the optical fiber inclined end is inclined; the SPR probe comprises an optical fiber; the end face of an exposed fiber core is provide with a first metal film, and the periphery of the exposed fiber core is provide with a second metal film; a nano-film is arranged on the surface of the second metal film; and a sensitive film is arranged on the nano-film. The system has the advantages of high universality, sensitivity and stability, and capable of realizing remote monitoring.

The invention discloses a vehicle-mounted portable liquid chromatographic instrument. The liquid chromatographic instrument comprises a double-motor straight-belt infusion pump, a sample feeding valve, a fluorescence and ultraviolet-visible absorption integral circulation tank, an optical fiber, an optical fiber spectrograph, a light source and a built-in wireless router, wherein the double-motor straight-belt infusion pump is connected with an inlet of the sample feeding valve; an outlet of the feed sampling valve is connected with a high-performance chromatograph column; an outlet of the high-performance chromatograph column is connected with the circulation tank; the light source is guided into the circulation tank through the optical fiber; transmission light or fluorescence of the circulation tank is guided into the optical fiber spectrograph through the optical fiber, is converted to an absorbance or fluorescence signal to be output; a control module is used for controlling and carrying out data collecting and processing on the infusion pump, the sample feeding valve and the optical fiber spectrograph through a wireless network. The vehicle-mounted portable liquid chromatographic instrument is complete in function, high in precision, small in size, good in anti-seismic property and applicable to field fast check of food safety and environmental protection.

The invention discloses a device for synchronously measuring the power, the spectrum and the beam quality of a high-power fiber laser. A collimator, a high-reflectivity mirror group, first wedge glass, a first multi-slot pluggable attenuator, a convex lens and a fiber probe are successively arranged along the same optical axis and form a spectrum-measuring optical path. The collimator is arranged at the output end of the fiber laser to be tested. The fiber probe is connected with a fiber spectrometer. A plane-concave mirror and a power meter target surface are successively arranged on the reflection optical path of the high-reflectivity mirror group. The power meter target surface is connected with a power meter. Second wedge glass is disposed on the reflection optical path of the first wedge glass. The second multi-slot pluggable attenuator and a beam quality analyzer are successively disposed on the reflection optical path of the second wedge glass. The above components are arranged on an optical platform. The device synchronously measures the power, the spectrum and the beam quality of the high-power fiber laser, improves measurement efficiency, reduces the influences of interference factors such as optical aberrations and pumping light on a measurement result, and improves measurement accuracy.

The invention discloses a fiber light-splitting multipath ultraviolet light source. According to the invention, an ultraviolet silica fiber is used as a multipath light splitter for providing a multipath ultraviolet light source required in an ultraviolet fiber spectroscopy process analysis process. The fiber light-splitting multipath ultraviolet light source comprises a light source, a lens, a fiber splitter, a fiber coupler, a common-end fiber group and a branch-end fiber group, wherein the common-end fiber group comprises a plurality of parallel fibers, the branch-end fiber group comprises a plurality of parallel fibers, the light source is arranged at one focus of the lens, input ends of all fibers of the common-end fiber group are arranged at another focus of the lens, and all the fibers of the common-end fiber group, the fiber splitter, all the fibers of the branch-end fiber group and the fiber coupler are connected with Y-type fibers of a fiber in-situ drug dissolution/release tester in sequence.

A system for real-time monitoring of flame properties in combustors and gasifiers which includes an imaging fiber optic bundle having a light receiving end and a light output end and a spectroscopic imaging system operably connected with the light output end of the imaging fiber optic bundle. Focusing of the light received by the light receiving end of the imaging fiber optic bundle by a wall disposed between the light receiving end of the fiber optic bundle and a light source, which wall forms a pinhole opening aligned with the light receiving end.

The spectrum measuring apparatus for optic fiber in electric field of the present invention is a spectrum measuring apparatus for optic fiber. The structure is that there is an optic fiber sealer on each end of the hollow optic fiber (1) with the sealer housing (3) of the sealer of the optic fiber having the shape of a glass pipe with hollow ball (4) in its center. On one end of the glass pipe is a glass window (5), the other end is sealed with encapsulating materials (7) such as indium and tin after inserted with a hollow optic fiber (1). The electrode (2) and sample filling pipe (6) are mounted on the glass ball of the sealer housing (3). The present invention can be used as a sample chamber for spectrometer with a high sensitivity and ready replacement of sample.

The invention discloses an H2S gas ultraviolet spectrum detection device and an H2S gas ultraviolet spectrum detection method. The H2S gas ultraviolet spectrum detection device comprises an ultraviolet light source, a fiber collimating system, a long-path gas absorption tank, a fiber focusing system, an ultraviolet fiber spectrometer and a computer, wherein the ultraviolet light source is used foremitting ultraviolet light; the fiber collimating system is used for collimating the ultraviolet light and then enabling the ultraviolet light to enter the long-path gas absorption tank; the long-path gas absorption tank is used for reflating the incoming ultraviolet light for many times, then focusing the ultraviolet light to fiber by the fiber focusing system and transmitting the ultraviolet light to the ultraviolet fiber spectrometer by the fiber; the computer is used for receiving spectral data and calculating and storing the data. The H2S gas ultraviolet spectrum detection device combines an ultraviolet differential absorption spectrum detection technology and the long-path gas absorption tank for performing real-time online detection on H2S during oil exploration, power monitoring or environmental monitoring; the H2S gas ultraviolet spectrum detection method has the characteristics of high measurement accuracy, good stability, a simple structure, high integration, low cost and the like; the safe progression of construction can be promoted and thus the exploration and development benefits are increased.

The invention provides a device for testing the color rendering performance of an eye ground laser therapeutic instrument lighting system, and mainly aims to solve the problems that in the prior art, when the color rendering performance of the eye ground laser therapeutic instrument lighting system is tested, steps are complex and efficiency is low. The device is characterized in that a laser therapeutic instrument lighting system simple assembly is fixedly connected with a CCD image acquisition assembly or a fiber optical spectrometer acquisition and processing assembly, optical filters comprise the first optical filter and the second optical filter, the first optical filter is located between a right angle reflecting prism and a slit lamp microscope objective lens and perpendicular to the direction of the slit lamp microscope objective lens, and the second optical filter is arranged between the right angle reflecting prism and a model eye device. The slit lamp microscope objective lens, the first optical filter, the right angle reflecting prism, the second optical filter and the model eye device are located in a same optical path. The device for testing the color rendering performance of the eye ground laser therapeutic instrument lighting system can qualitatively and quantitatively test the color rendering performance of the eye ground laser therapeutic instrument lighting system respectively, and the system is simple and compact in structure and convenient and quick to assemble.