43 results about "Laser Scanning Microscopy" patented technology

The present invention concerns a confocal laser scanning microscopy apparatus, comprising: means for emitting a laser beam; means for scanning this laser beam in at least two directions onto an observed sample; means for generating a non linear light signal from the transmitted laser light, these non linear light signal generating means being disposed in the light path between the observed sample and detecting means which are adapted for detecting said non linear light signal.

The invention provides novel use of a cyanine dye in the detection of a G-quadruplex DNA. The detection of the G-quadruplex DNA by using the cyanine dye has the advantages of simplicity, quickness and relatively low prices and overcomes the drawbacks of the prior detection technology such as long period, high price and high technical and equipment requirements. The use of the cyanine dye in the detection of the G-quadruplex DNA makes whether a DNA sample in solution has a G-quadruplex structure or a linear double helical structure determined quickly by a UV-visible absorption spectrum, fluorescence spectrum or confocal laser scanning microscopy. By using confocal laser scanning microscopy, the DNA sample assembled on the surface of Au can be marked visually, so the structure of the DNA sample can be recognized and the specific assembly position of the DNA sample on the surface of the Au can be marked at the same time.

A method for evaluating signals of fluorescence scanning microscopy with simultaneous excitation and detection of fluorescence in different focal planes of a sample by means of confocal laser scanning microscopy. The invention evaluates signals of fluorescence scanning microscopy without the signal losses usually taking place with a confocal aperture, by coupling an illumination beam into a microscope observation beam path which images a measuring volume on a detector array arranged in the image plane, focusing the illumination beam which passes through a beam-forming phase mask for generating an elongated focus in the measuring volume, collecting and collimating fluorescent light generated in the measuring volume and routing it to diffractive optics which split the light beams into different diffraction orders and impress a different spherical phase on the light beams, imaging the different diffraction orders on detector regions of the detector array so that fluorescent light from focal planes at different depths of the measuring volume are associated with different diffraction orders, and associating the fluorescence signals on which crosstalk is superposed from different focal planes of the measuring volume with defined focal planes by means of correlation-based association based on distinguishable blinking behavior of fluorescing dyes.

The invention provides a membrane pore structure and a porosity testing method based on CLSM (confocal laser scanning microscopy), comprising: preparing a sample, observing the sample, processing data and the other steps. Traditional testing methods include scanning electron microscopy, transmission electron microscopy, mercury intrusion method, nitrogen adsorption method and other methods and have their respective disadvantages; for example, high pressure required in the testing process of the mercury intrusion method may deform membrane structure; sample preparation in the transmission electron microscopy and scanning electron microscopy is high in time consumption and results in big damage to samples. Membrane pore structure and porosity are tested by means of confocal laser scanning microscopy, it is only required to perform single dyeing on a sample under test with fluorescent dye, information in the sample can be acquired without destroying the sample, operating is simple, and little damage is caused to the sample; in addition, sample testing herein has no need for drying, namely, a sample can be tested in an environment similar to a membrane when a liquid separation membrane is under test, and the results are more accurate and reliable.

The invention discloses a fluorescence labeling method for free calcium ions of a cotton pollen tube, and belongs to the technical field of biology. The fluorescence labeling method comprises the following steps: perforating glass slide to make a small chamber for culturing the pollen tube; culturing pollen in the small chamber, and sprouting the pollen tube; loading Fluo-3AM into the cultured pollen tube by a low temperature incubation method; and observing dynamic variation of Ca2+ in the pollen tube under a confocal laser scanning microscopy. The invention establishes a method for researching the concentration change of the Ca2+ in the cotton pollen tube by using the confocal laser microtechnique, has simple operation and good labeling effect, plays an important role in the growth of the cotton pollen tube and fertilization reproduction research, and has important practical application value.

The invention relates to a laser scanning microscope with a scanner and a microscope objective, and to a control method for such a microscope. In order to obtain sharp imaging of the sample in a laser scanning microscope, the distance between the microscope objective and the sample is usually varied for adjusting the focus position. However, relative movements between the objective and the sample can be problematic. In view of the costly special objective, internal focusing of the objective is a disadvantageous solution. An improved laser scanning microscope should make it possible to sharply image a sample with standard objectives without relative movement between the microscope objective and sample. According to the invention, a tube lens is provided which is displaceable along the optical axis, and the focus position is adjustable relative to a front optical element of the microscope objective by adjusting the tube lens.

The invention includes methods of enucleating avian eggs comprising visualizing internal structure of an avian egg utilizing TPLSM and ablating the nucleus of the egg by near-infrared light.

A system for time resolved spectroscopy comprises a CCD device arranged to receive a time varying spectrum. Time resolved spectroscopy is the analysis of a spectrum that varies with time due to any cause. The variation with time of the spectrum may be due, for example, to (i) changes of the spectrum from a given sample space with time (such as due to emission decay); and (ii) changes in the spectrum as successive portions of a sample space are sampled (such as laser scanning microscopy). The CCD device comprises an array of photosites arranged to detect the time varying spectrum and to produce signal charge representative of the spectrum, and one or more CCD multiplication registers arranged to receive the signal charge and to provide charge multiplication. An enhancement of speed and sensitivity is given by a storage area which receives the signal charge in parallel from the array of photosites to provide the charge in serial to the one or more multiplication registers.

The invention relates to a self-adaptive aberration correction image scanning microscopic imaging method and device and belongs to the field of optical microscopic measurement. According to the self-adaptive aberration correction image scanning microscopic imaging method and device of the invention, an aberration correction system is introduced into an image scanning microscopic imaging method soas to carry out adaptive aberration correction. Before correction, a sCOMS is directly utilized to perform full-pixel pre-imaging, and a full-pixel image is utilized to form an adaptive aberration correction evaluation function. An image evaluation function is tested in real time in a correction process, and a computer is used for controlling the aberration correction system to carry out self-adaptive aberration correction. This process does not need scanning, and is quick and simple. And parameters of a pixel redistribution process are reset on the basis of the change of the evaluation function in an aberration correction process, so that the pixel redistribution process is optimized. The number of the effective pixels of the sCMOS camera in a laser scanning microscopy process is set according to residual aberration. With the method adopted, the aberration of the image scanning microscopic imaging system can be effectively corrected, the effectiveness of the pixel redistribution process can be improved, and the improvement of image scanning imaging resolution can be achieved to the greatest extent.

The invention belongs to the technical field of synthesis of fluorescent probes, and provides a pyrene-based ratiometric fluorescent probe as well as a preparation method and a biological applicationthereof to solve the problems that the conventional fluorescent probes are high in detection limit, poor in light stability and the like. The pyrene-based ratiometric fluorescent probe is used for detection of HSO3<-> and imaging in a biological body, is 1-(pyrene-1-yl)-3-(4,5-dibromothiophene-2-yl)acrylketone, and is prepared through the following steps: pyrene taken as a starting material is subjected to a reaction with anhydrous aluminium trichloride and acetyl chloride in the mole ratio of 4:5:7, 1-acetylpyrene is obtained and is mixed and dissolved with 4,5-dibromothiophene-2-formaldehydein the mole ratio of 3:4, 10% NaOH solution is added, stirring reaction is performed at room temperature, and the fluorescent probe is obtained. Detection of HSO3<-> by the fluorescent probe is ratiometric, reaction is quick, selectivity and sensitivity are high, and the fluorescent probe can be used for detecting HSO3<-> in the biological body through combination with confocal laser scanning microscopy.

An ophthalmologic observation apparatus of a confocal laser scanning microscopy system for photographing and observing a target site of an eye of an examinee, includes a controller that, based on a number of image lines of one frame of a motion image to be displayed, a number of reflection faces of a polygon mirror, and a detection result of a photo sensor, controls a galvano mirror and an image forming unit so as to form each image line of each frame of the motion image based on the photo-receiving signals of a laser beam reflected on same reflection face of the polygon mirror.

The invention discloses a novel fluorescent molecular probe, which has a general formula with the following structure, wherein R1 is an alkyl chain having 1-8 carbon atoms, and R2 is hydrogen, a sulfonic acid group, a sulfonic acid ion group or a 3-15 carbon atom-containing quaternary ammonium group which is connected to a position 2,3,5 or 6 of an intermediate benzene ring. The invention also discloses application of the novel fluorescent molecular probe in the field of Al (III) detection. The novel fluorescent molecular probe provided by the invention has higher selectivity and sensitivity on Al (III). Through combining confocal laser scanning microscopy, fluorescence imaging of the fluorescent molecular probe after Al (III) is captured in cells can also be obtained.

Both light stimulation of a specimen at a high intensity and detailed fluorescence observation at a low intensity are realized by using a single laser light source. Provided is a laser scanning microscope apparatus (1) including a laser light source (11) that generates laser light; output-power control portion (13) that can set an output power of the laser light source (11) by changing the output power in a step-wise manner; an AOTF (15) that can adjust a light level of the laser light emitted from the laser light source (11) in a step-wise manner at a resolution that is finer than a resolution at which the output-power control portion (13) changes the output power of the laser light source (11); and an observation device (17) that scans the laser light whose light level has been adjusted by the AOTF (15) on a specimen and that detects fluorescence generated at the specimen.

An optical assembly for scanning excitation radiation and/or manipulation radiation in a laser scanning microscope, having an optical scanning unit for providing a first pupil plane, a first beam deflecting device, which is made of a first scanner arranged on the first pupil plane, for scanning the excitation radiation and/or manipulation radiation in a first coordinate direction, a first focusing device for generating a second pupil plane, which is optically conjugated to the first pupil plane, and a second beam deflecting device for deflecting the excitation radiation and/or manipulation radiation, said second deflecting device being arranged on the second pupil plane, a second focusing device in order to generate a third pupil plane, which is optically conjugated to the first pupil plane and the second pupil plane, a third beam deflecting device is arranged on the third pupil plane for deflecting the excitation radiation and/or manipulation radiation, and a variable beam deflecting means is provided between the first focusing device and the second pupil plane and the second pupil plane and the second focusing device in order to switch an optical beam path between a first beam path and a second beam path.

The invention belongs to the field of medical appliances and particularly relates to a diagnosis and treatment integral confocal anorectal enteroscope system, which comprises a hard anorectal enteroscope, wherein the end part of a hard endoscope of the hard anorectal enteroscope is provided with a treatment device, and a treatment system host machine matched with the treatment device to be used is connected onto the hard anorectal enteroscope. The diagnosis and treatment integral confocal anorectal enteroscope system is concretely and organically combined with a laser cutter system or a microwave coagulator system through the hard anorectal enteroscope and a confocal laser scanning microscopy system. The diagnosis and treatment integral confocal anorectal enteroscope system can realize the effect that the diagnosis and the treatment are simultaneously carried out during the clinic application, an optical system and the confocal laser scanning microscopy system can be respectively used for observing the macroscopical conditions in the anorectum and the microscopic structures of the anorectal wall and the pathological changes to make accurate diagnosis, the laser cutter system or the microwave coagulator system can be used for carrying out laser treatment or microwave treatment on the pathological changes under the direct viewing condition through a monitor. When the diagnosis and treatment integral confocal anorectal enteroscope system is used for operation, the goal of simultaneously solving the problems in the diagnosis aspect and in the treatment aspect by one enteroscope can be realized, the frequent endoscope replacement is avoided, the operation time is greatly saved, the pain of patients is relieved, the accuracy and the safety of the operation are further improved, and effects beyond the imagination can be reached.

The invention provides a microscopic imaging device. The microscopic imaging device comprises a laser generator for generating laser, and frequency modulation equipment, scanning galvanometer equipment and microscopic equipment which are sequentially arranged along a light path of the laser, the frequency modulation device comprises a coupling lens, an optical fiber, a decoupling lens, a first optical filter, a germanium sheet and a medium-density attenuation sheet which are sequentially arranged along the optical path of the laser. The soliton self-frequency-shift effect of the laser in the optical fiber is utilized, after the laser generates frequency shift in the polarization-maintaining large-mode-field optical fiber, the first optical filter is used for selecting the frequency of the laser, and then the laser with the corresponding frequency and wavelength is obtained and used for laser scanning microscopy.

The invention belongs to the technical field of synthesis of a fluorescent probe. In order to solve the problems that an existing fluorescent probe is high in detection limit and poor in photostability, the invention provides an enhanced fluorescent probe for detecting CN- (Cyanogens), a preparation method and a biological application thereof. The fluorescent probe is 1-(pyren-1-yl)-3-(N-ethyl carbazole-3-yl)acrylketone. The preparation method comprises the steps of dissolving 1-acetylpyrene and N-ethyl carbazole-3-formaldehyde in anhydrous ethanol, then adding sodium hydroxide, continuously stirring the mixture at room temperature for 4 h, precipitating a yellow solid, tracking the reaction with a TLC (Thin-Layer Chromatography), performing suction filtration after the reaction is completed, washing with anhydrous ethanol and water (1/1, v/v), and drying in vacuum to obtain yellow powder. The detection of the fluorescent probe for CN- is enhanced, the reaction is rapid, the selectivity and sensitivity are high, and the fluorescent probe can be used for detection of CN- in an organism in combination with a confocal laser scanning microscopy.