74 results about "Micro raman spectroscopy" patented technology

The invention discloses a confocal microscopic Raman spectrometer with angle resolution capacity and relates to Raman spectrometers. The confocal microscopic Raman spectrometer comprises a microscope objective, a low-pass light filter, a high-pass light filter, a reflector, a beam splitter, adjustable diaphragms, a collimating lens, an optical fiber and a corresponding laser light source, a spectral signal detector, an illuminating light source and a CCD (Charge Coupled Device) camera, wherein light emitted by the laser light source enters the microscope objective through the optical fiber, the collimating lens, the high-pass light filter and the low-pass light filter, the positions of the incident parallel beams can be adjusted by moving the high-pass light filter from left to right along the horizontal direction, and an angle of exciting light which reaches the sample surface is adjusted. The first adjustable diaphragm can control the pore diameter of the incident parallel beams, and the positions of emergent parallel beams can be adjusted by moving the reflector from the left to right along the horizontal direction, so that an angle of Raman scattering light collected from the sample surface is adjusted; and the second adjustable diaphragm can control the pore diameter of the Raman scattering light beams, and the sample can be imaged through the illuminating light source, the beam splitter and the CCD camera.

The invention discloses a Raman atomic force microscopic detection device and method. A first support post and a first fixing block are sequentially arranged on one side of an optical platform from top to bottom, a second support post and a second fixing block are sequentially arranged on the other side of the optical platform from top to bottom, a support cross beam is fixedly arranged at the upper ends of the first support post and the second support post, an X-direction stepping electric control transverse moving table is arranged above the support cross beam, a slide block is arranged on the X-direction stepping electric control transverse moving table, the lower end of the slide block is provided with a Z-direction moving rail, an L-shaped fixing block is arranged on the Z-direction moving rail, an atomic force microscopic probe cross beam is arranged on the L-shaped fixing block, an atomic force microscopic probe is arranged on the atomic force microscopic probe cross beam, both sides of the atomic force microscopic probe are respectively provided with a Raman spectrum microscopic probe and an optical microscope, and a Y-direction stepping electric control transverse moving table, a sample table and a sample to be measured are sequentially arranged on the optical platform from bottom to top. The micro nanometer form structure information and the microscopic Raman spectrum information of the samples can be obtained in real time on line.

The invention discloses an agricultural product pesticide residue detection method. The method comprises the following steps that template molecules, chitosan, hydroxyethyl acrylate, polyethyleneimineand deionized water are taken, imprinted hydrogel with the template molecules is synthesized; pretreatment of to-be-detected vegetables is completed, and a to-be-detected sample solution is prepared;the template molecules of the obtained imprinted hydrogel are removed; a standard Raman spectrogram of the template molecules is made; the imprinted hydrogel obtained after the template molecules areremoved is soaked in the to-be-detected sample solution and fished out, after confocal micro-Raman Spectrum detection is conducted, the obtained Raman Spectrum is compared with the standard Raman spectrogram, and then whether the template molecules are contained in samples or not is judged, and the content range of the molecules is judged preliminarily. Accordingly, the hydrogel with the specificrecognition function is prepared through a molecular imprinting technology, after the to-be-tested samples are adsorbed and enriched by the hydrogel, spectra collection is conducted by means of a portable Raman spectroscope, and whether the samples contain pesticide or not is judged by comparing with the standard Raman spectrogram.

The invention discloses a single-grating Raman spectrum testing system for measuring low-wave-number Raman signals. The system comprises a laser source, a volume grating bandpass filter, a beam splitter, a microscope objective, three volume grating notch fibers, a focusing lens and a single-grating spectrometer, wherein the volume grating bandpass filter is positioned on a laser optical path, and is used for filtering plasma lines of laser light and purifying laser lines; the beam splitter is positioned on the light path of laser light reflected by the volume grating bandpass filter, and is used for reflecting the laser light purified by the volume grating bandpass filer onto the microscope objective; the microscope objective is used for focusing the laser light onto a sample for exciting Raman spectrum signals; the three volume grating notch fibers are arranged in sequence, and are positioned on a light path on which sample Raman signal light is collected by using microscope objective and passes through the beam splitter; the focusing lens is used for converging the Raman signals into the inlet of the single-grating spectrometer; and the single-grating spectrometer comprises a detector, and is used for collecting Raman signals. The system can be used for detecting Raman spectrum signals of which the wave numbers are as small as 5, so that a microscopic Raman spectrometer has remarkable advantage on the aspect of measuring low-wave-number Raman spectrums than an infrared spectrometer.

The invention discloses an in-situ spectrum analysis pool for gas-sensitive sensing exploration and applications, wherein the in-situ spectrum analysis pool is suitable for in-situ spectrum analysis of equipment such as an infrared spectrometer and a micro-Raman spectrometer, an optical window is arranged at the top of a cavity, and a sealing ring is arranged between a cavity top cover and a bottom in-situ pool main body; a sample temperature control table containing a temperature control element and a temperature measuring element is arranged in the closed in-situ spectrum analysis pool, and the height of the sample temperature control table can be adjusted; a sample test area is arranged on the sample temperature control table, and a plurality of electrical probes are arranged around the sample test area and used for measuring the electrical characteristics of a sample to be tested; the closed in-situ spectrum analysis pool is provided with a plurality of gas inlets and outlets and is used for vacuumizing treatment, and after various gases are mixed according to a specific proportion through a gas distributor, the gases are introduced and discharged. According to the invention, the sample to be measured is placed in the in-situ pool, gas entering the cavity of the in-situ pool through the gas guide tube skims over the surface of the sample, spectral information in the gas-solid reaction process can be collected in situ, and the electrical characteristics of the gas sensor are measured.