38 results about "Slit diaphragm" patented technology

The gene chip scanister mainly is used for detecting fluorescently-labeled post-hybridization gene biological chip, including the following steps: a laser beam is saped by linear shaper and passed through a reflector with slit to form a linear laser beam on the tested chip; the optical signal fed back by tested chip is passed through the reflector with slit and reflected, then passed through a photographic optical system and image in the slit diaphragm position; when it is excited by using laser beam with multiple wavelength, said signal is further passed through first imaging lens, dispersing element and second imaging lens and reflected on the detector of electric charge coupler with face array or line array. As compared with existent technology, it not only can simplify scanning direction, save detection time, but also can raise the resolution and accuracy of the detection.

The invention discloses a laser sensor and an airborne particle counter with the laser sensor. The laser sensor which comprises a semiconductor laser which is used as a laser light source is characterized in that: a slit diaphragm which is arranged under the irradiation of the laser light source allows the laser light source to form a photosensitive area; a photoelectric receiver is arranged in the photosensitive area at a vertical direction; a suction nozzle and a venting nozzle which is symmetric with the suction nozzle are arranged in the photosensitive area at the vertical direction; and the suction nozzle comprises an internal sampling tube for conveying a sampling gas and an external protection tube which is arranged on the outboard of the internal sampling tube and is used for providing the protection gas. By adopting the airborne particle counter, large granular airborne particles with the diameter of over 10mum in air can be accurately detected.

Device (1) and method for delimiting a field (3) impinged with light from a light source (2), particularly on the surface of an optical element (4) and / or sample (5), having a slit diaphragm (6) including a slit height (7) and a slit width (8), which includes first and second linearly movable slides (9, 9′), positioned parallel to one another on two separate parallel lines, which are movable at least partially symmetrically to one another in relation to an optical axis (10), each of the two slides (9, 9′) including at least one optical opening (11, 11′), which—for continuous adjustment of at least the slit height (7) or the slit width (8)—may be positioned at least partially on the optical opening (11′, 11) of the neighboring slide (9′, 9) in the region of the optical axis (10). The device (1) according to the present invention and the method according to the present invention are distinguished in that the device (1) includes a motor drive (15) having an axis of rotation (16) for moving the two slides (9, 9′) in a movement direction (19), this axis of rotation (16) of the motor drive (15) being positioned perpendicularly to this movement direction (19).

The invention relates to a high-resolution microscope and to a method for determining the two- or three-dimensional positions of objects. The microscope and method includes the following: (a) The vertical (Z) position of imaged particles or molecules being determined from the orientation and shape thereof by means of an anamorphic lens, preferably a cylindrical lens, in the imaging, (b) the detection beam path being split into at least two partial detection beam paths having different optical path lengths, which are detected at an offset on a detector, (c) activation or switchover being performed by means of a multi-photon excitation process, preferably two-photon excitation. The following are also included: (d) a point-scanning activation or switchover, (e) a line-scanning activation or switchover, (f) the sample is excited and the sample light is detected in the wide-field mode, (g) manually or automatically predetermined sample regions are activated or switched over, (h) the activation or switchover is performed by means of AOTF or SLM or DMD, (i) laser pulses for activating or switching are spectrally split by means of a spectrally splitting element, preferably a grating, (j) an SLM or DMD in the beam path after the grating performs a controlled selection of split laser pulse fractions, (k) the laser wide-field excitation is guided by SLM or DMD, (l) ROIs are selected by SLM or DMD, (m) a multi-photon switching or activation is performed by means of a microlens array, preferably a cylindrical lens array, n) switching and / or excitation is performed by means of a line scanner, and (o) a line detection is performed by means of a spatially resolved sensor, wherein at least two sensor rows, each comprising a plurality of sensors, are illuminated with sample light by means of a slit diaphragm position.

Device (1) and method for delimiting a field (3) impinged with light from a light source (2), particularly on the surface of an optical element (4) and / or sample (5), having a slit diaphragm (6) including a slit height (7) and a slit width (8), which includes first and second linearly movable slides (9, 9′), positioned parallel to one another on two separate parallel lines, which are movable at least partially symmetrically to one another in relation to an optical axis (10), each of the two slides (9, 9′) including at least one optical opening (11, 11′), which—for continuous adjustment of at least the slit height (7) or the slit width (8)—may be positioned at least partially on the optical opening (11′, 11) of the neighboring slide (9′, 9) in the region of the optical axis (10). The device (1) according to the present invention and the method according to the present invention are distinguished in that the device (1) includes a motor drive (15) having an axis of rotation (16) for moving the two slides (9, 9′) in a movement direction (19), this axis of rotation (16) of the motor drive (15) being positioned perpendicularly to this movement direction (19).

The invention provides an optical vortex optical fiber current sensor based on single slit detection. The sensor includes a linear polarization laser, a single mode fiber, a polarization controller, an optical vortex optical fiber, a fiber grating, a line detection polarizer, a single slit diaphragm, and a photodetector. The fiber grating achieves excitation of composite optical vortex modes in anannular core of the optical vortex optical fiber, a double-lobe light intensity distribution can be formed by the line detection polarizer, a current magnetic field is applied on the optical vortex optical fiber after the fiber grating, based on a Faraday magneto-optical effect, a phase difference is produced between the composite optical vortex modes, output lobe light spots rotate, light intensity passing through the single slit diaphragm changes, the amount of change of the light intensity is in direct proportion to the magnitude of current, the magnitude of the applied current can be measured according to a change of the light intensity, a suitable single slit width is selected through a parameter of the single slit width and a light spot diameter ratio, so that the sensing sensitivity is optimal. The optical fiber current sensor has the characteristics of high sensitivity, simple structure, easy practicality, and the like, and has important application value in the field of current measurement.

In one aspect, an optical sensor is used to detect defects, which can appear on smooth surfaces, is provided. The sensor includes a telecentric laser scanner and a detection unit. The scanner includes a laser for the approximately perpendicular illumination of a smooth surface, a scanning mirror, and a telecentric optical system for guiding illumination and detection beams the detection unit includes an optical detector system, a central diaphragm, which is concentrically positioned in the vicinity of the optical detector system in the direction toward the telecentric laser scanner, a highly sensitive photomultiplier for detecting scattered light, which emanates from defects on smooth surfaces, and a slit diaphragm arranged upstream of the photomultiplier.

The gene chip scanister mainly is used for detecting fluorescently-labeled post-hybridization gene biological chip, including the following steps: a laser beam is saped by linear shaper and passed through a reflector with slit to form a linear laser beam on the tested chip; the optical signal fed back by tested chip is passed through the reflector with slit and reflected, then passed through a photographic optical system and image in the slit diaphragm position; when it is excited by using laser beam with multiple wavelength, said signal is further passed through first imaging lens, dispersing element and second imaging lens and reflected on the detector of electric charge coupler with face array or line array. As compared with existent technology, it not only can simplify scanning direction, save detection time, but also can raise the resolution and accuracy of the detection.

The invention relates to a reflecting photometer of golden mark immunity test tape that includes scanning platform, optical system, phototranslating and signal multiplication system and data gathering and control system. The scanning platform is used to locate tested golden mark immunity test tape, and the optical system includes plural illuminating optical paths and a receiving optical path. Each illuminating optical path contains a light source and an illuminating condensing lens. The receiving optical path is made up of collimating mirror, filter, condensing lens and slit diaphragm. The phototranslating and signal multiplication system is made up of phototranslating components and pre-amplification circuit, the data gathering and control system is made up of multifunction data gathering card and computer. The invention could accurately judge the tested object and the thickness. It also has the advantages of high sensitivity, objective testing result and flexible to use.

The invention discloses a pointed bent rectangular waveguide based on a hyper-transport gap membrane. The waveguide is used for solving the technical problems that in the prior art, a waveguide structure is complex and the size is large. The pointed bent rectangular waveguide comprises a pointed bent rectangular waveguide body and the hyper-transport gap membrane. An H-face bent waveguide is adopted as the pointed bent rectangular waveguide body and is formed by splicing two symmetric waveguide structures, the hyper-transport gap membrane is loaded at the splicing position, a connection flange is arranged at one end of each waveguide structure, an inclined angle is formed between the plane where each connection flange is located and the cross section of the waveguide body, and the plane is inclined in the narrow-side direction of the cross section of the waveguide body; open gap structures in different modes are arranged in the center of the hyper-transport gap membrane, C-type single-frequency resonance rings or C-type multi-frequency resonance rings are adopted as the open gap structures, the openings face towards the wide side of the hyper-transport gap membrane, and non-reflection transmission of single-frequency or multi-frequency in-band electromagnetic waves can be achieved. The rectangular waveguide achieves non-reflection transmission of electromagnetic waves in the rectangular waveguide bent by any angle, and has the advantages of being simple in structure and small in size.

The invention relates to the field of magnetic measurement of a material surface and discloses a Kerr microscope. The Kerr microscope comprises a light source, a first aspheric mirror, a second aspheric mirror, a view field diaphragm, a polarizer, a third aspheric mirror, a semi-transparent mirror, an objective lens, a laser, a sample, a sample table, a substrate, a stepping motor, an inclined table, a thimble, a magnet, a slit diaphragm, a first photodetector, a compensator, an analyzer, a fourth aspheric mirror and a second photodetector, wherein the light source, the first aspheric mirror,the second aspheric mirror, the view field diaphragm, the polarizer, the third aspheric mirror, the semi-transparent mirror and the objective lens sequentially form a lighting path; the objective lens, the semi-transparent mirror, the compensator, the analyzer and the fourth aspheric mirror sequentially form an imaging light path; and the laser, the sample surface, the slit diaphragm and the firstphotodetector form a calibration light path. The phenomenon that a lighting area on the sample is changed by a diaphragm slit is not needed, the Kerr sensitivities in different directions are measured, and through adjusting the turning-on number of LED lamps and the lasting time, an image with good resolution is acquired.

The present invention proposes a miniaturized uncooled infrared imaging spectrometer and method, wherein the spectrometer includes sequentially installed along the optical axis direction: scanning mirror, objective lens group, slit diaphragm, collimating objective lens group, interferometer, relay mirror and an imaging component, the spectrometer also includes an uncooled infrared focal plane detector and an interference spectrum processing module, the uncooled infrared focal plane detector is placed between the relay mirror and the imaging component, and the interference spectrum processing module receives the interference image sent by the imaging component signal, preprocessing the interference image signal and reconstructing the interference image, and outputting the spectral image; the interferometer includes a thin prism and a plane mirror in contact with each other, wherein the upper surface of the thin prism is jagged, with at least two peaks, each The spike is aligned with a slit in the slit diaphragm.

The invention comprises an x-ray unit and a method for recording x-ray projections. The x-ray unit according to the invention is designed for moving the examination object along the longitudinal axis at a feed speed and further comprises a recording unit which is rotatable about the longitudinal axis. The recording unit includes an X-ray emitter for emitting X-rays in the form of X-ray beams and an X-ray detector for detecting X-rays. The inventors realized that a fixedly positioned first slit aperture having a first opening of width D_1 along the longitudinal axis designed for shaping an X-ray beam having a width DZ_1 at the level of the longitudinal axis and having a first aperture along the longitudinal axis A second slit aperture with a second opening of width D_2 on the longitudinal axis, designed for shaping an x-ray beam with width DZ_2 at the level of the longitudinal axis, is sufficient to enable selective irradiation of the active volume in helical mode, wherein There is DZ_2

A rainbow schlieren measurement imaging system and method, the system includes a light source for outputting optical signals; and a first focusing lens, a slit stop, a first collimating lens, Flow field observation area, second focusing lens, rainbow filter, second collimating lens, digital microarray mirror, converging lens and three-color single-point photodetector; compression connected with electrical signal of three-color single-point photodetector The algorithm module is used for reconstructing the color image, and calculates the density change distribution of the observed flow field according to the rainbow schlieren calculation method of the image. The present invention combines compressed sensing theory with rainbow schlieren measurement, and creatively proposes a sparse rainbow schlieren measurement method, which has the characteristics of high throughput, high signal-to-noise ratio, fast and flexible, and is suitable for conventional light intensity, weak light, and weak light , ultra-weak light and single-photon rainbow schlieren measurement method, which is a sparse rainbow schlieren measurement method with a large dynamic range.