47results about How to "Scan stable" patented technology

A light beam scanning device may include a light source device, and an optical deflection mechanism for scanning a light beam which is emitted from the light source device over a prescribed angular range by an optical deflection element. The light source device may be provided with a light emitting source and a condenser lens for guiding the light beam emitted from the light emitting source as a converged light beam which is focused on the optical deflection element or its vicinity in at least one of a first direction and a second direction which are perpendicular to an optical axis direction. The light beam scanning device may further include a divergence angle modification lens for varying a divergence angle of an emitted light beam from the optical deflection element in at least a direction perpendicular to a scanning direction by the optical deflection element.

An optical scanning unit (5) includes a light source (10), an optical deflector (20) that includes a light transmission window (20b, 22b, 24b, 26b) disposed on a light path from the light source (10) and a rotatable mirror (20c) that includes a reflecting surface to reflect light that goes through the light transmission window (20b, 22b, 24b, 26b) into the light transmission window (20b, 22b, 24b, 26b) and to deflect the light from the light source (10) toward a surface, and a light shield (30) disposed on a light path of reflected light of the light from the light source (10) reflected by a surface of the light transmission window (20b, 22b, 24b, 26b).

This invention relates to a fourier spectrometer based on dynamic stable scanning technology<0}. Wherein, it comprises a white light and laser source, an optical system mainly with Michelson interferometer, a feedback module to detect and convert the weak optical signal into electric signal, an A/D control module, an actuator module to control the phase difference of two arms of the interferometer, and a measurement module to detect the feedback and actuator modules for locked phase condition. This invention overcomes the defects in prior art, and can large-stroke continual scan with high precision, resolution and SNR.

Deformation of a second optical carriage (B) due to heat is large on a (C) side where an inverter (31) is attached and small on a (D) side. A mirror supporting portion inside the second optical carriage (B) supports the mirror at one point on the (C) side and at two points on the (D) side. An angle of the reflecting mirror (8) depends on two protrusions on the (D) side where thermal deformation is small, and the mirror is supported at one point on the (C) side where thermal deformation is large. Thus, even if an angle of the mirror supporting portion (C) changes, the angle of the reflecting mirror (8) is not affected. Therefore, a change in the angle of the reflecting mirror (8) can be controlled to be small when temperature of the second optical carriage (B) rises during a reading operation, and decrease in reading accuracy due to thermal deformation of the second optical carriage (B) can be suppressed.

The invention relates to the field of pathological section analysis, in particular to a whole-course quality control device of a pathological section image and a pathological section analysis device.The whole-course quality control device comprises a slide detection unit, a scanning layer number selection unit and an image quality scoring unit which are electrically connected in sequence; and theslide detection unit is used for detecting and calculating current slide information for the scanning layer number selection unit to automatically select or specifically increase the scanning layer number for scanning, and after scanning is finished, the image quality scoring unit introduces a CTF pointer as an image quality control evaluation technology to evaluate the quality of the whole slide.

The invention discloses an integrated three-dimensional measurement system and a measurement method. The measurement system comprises a housing, wherein the top surface and the front surface of the housing are open; a projection hole and a camera mounting hole are respectively formed in the bottom surface of the housing; a CMOS camera is mounted in the camera mounting hole; sliding grooves are formed in two opposite side surfaces of the housing; a device mounting plate is mounted on the sliding grooves; and a controller is arranged on the device mounting plate. The measurement method comprisesthe following steps: generating a phase shift structured light pattern with sinusoidal brightness changing with time by the controller, obtaining a brightness time table corresponding to the light pattern, and transmitting the brightness time table to a semiconductor laser. The problem that a three-dimensional measurement device in the prior art is difficult to be suitable for a space-limited environment can be solved, and the system is high in environmental adaptability, high in reliability and accurate in measurement.

The invention relates to the technical field of laser marking machine, in particular to a code reading and coding all-in-one machine which comprises a shell. A galvanometer scanning head, a code reading camera, a laser output isolator and a half transparent and half reflecting mirror are arranged in the shell; a field lens is arranged at the lower end of the shell and is connected with the galvanometer scanning head; a visible light source and a visible light focusing assembly are connected to the lower end of the field lens; a laser input port is fixedly connected to one end of the shell; a laser light input from the laser input port is transmitted to the surface of a workpiece under the field lens by sequentially passing through the laser output isolator, the half transparent and half reflecting mirror and the galvanometer scanning head; and a visible light emitted by the visible light source is reflected through the workpiece and transmitted to the half transparent and half reflecting mirror through the field lens and the galvanometer scanning head, and is reflected to the code reading camera through the half transparent and half reflecting mirror. Through arranging the visiblelight focusing assembly, invisible laser focal points can be displayed through the visible light, and the position of a laser focal point can be quickly found through a visible light focal point whena production line product is replaced.

The invention discloses a rapid medical image processing device, and the device comprises a box. The upper end of the box is provided with a camera, and two sides of the camera are provided with infrared scanning apparatuses. The surface of the upper part of the box is provided with a touch display screen, and a medical card swiping apparatus is disposed below the touch display screen. An ID cardrecognition scanning apparatus is disposed below the medical card swiping apparatus, and an operation slot is disposed at the left side of the ID card recognition scanning apparatus. The interior of the operation slot is provided with a control keyboard and a mouse. A medical image scanning inlet is disposed below the operation slot, and the interior of the medical image scanning inlet is providedwith medical image scanning equipment. A printing outlet is disposed below the medical image scanning inlet. The device is stable in structure and operation, can achieve the quick scanning and quickprocessing and diagnosis of different types of medical images, is diversified in diagnosis feature libraries, is quick in image processing and feature matching, is stable in feature matching correction, can effectively guarantee the diagnosis processing accuracy of the medical image, and meets the conventional application requirements.

The invention discloses a laser radar and a control method thereof. The laser radar comprises a motion detection device, a feedforward control device and a scanning device. The motion detection deviceis suitable for measuring the motion state of a laser radar, generating a motion signal and inputting the motion signal into the feedforward control device; the feedforward control device is suitablefor generating a feedforward control signal according to the motion signal and inputting the feedforward control signal into the scanning device; and the scanning device is suitable for carrying outadjusting according to the feedforward control signal. By adopting the scheme, the interference of external vibration on the laser radar can be reduced, and the stability and quality of point cloud data generated by the laser radar in a vibration state are improved.

The invention relates to the technical field of intelligent express code scanning devices. The invention relates to an intelligent express code scanning device based on the Internet of Things. The device comprises a bottom plate, A vertical partition plate is integrally arranged in the middle of the bottom plate. A conveyor belt body I and a conveyor belt body II are respectively mounted at the upper part of the bottom plate by taking the partition plate as a symmetric center; telescopic hydraulic cylinders are respectively mounted at the left end and the right end of the partition plate through bolts; a top plate is mounted between the top ends of the two telescopic hydraulic cylinders through bolts; wherein the package conveying opening is formed in the right end of the conveying belt body I and the left end of the conveying belt body II respectively, the package receiving opening is formed in the left end of the conveying belt body I and the right end of the conveying belt body II,and a label can be selectively pasted to the center of the front portion over a package in the package label pasting process before conveying and scanning.

A transmission optical system comprises a concave surface mirror whose reflection surface is directed toward a deflection mirror surface and a transmission lens which is disposed between the concave surface mirror and the deflection mirror surface. A light beam deflected by a deflecting element at a first deflection angle is guided to the concave surface mirror via the transmission lens, and the light beam returned by the concave surface mirror is guided to the deflecting element via the transmission lens. In consequence, the deflecting element reflects the light beam twice, and the light beam is emitted toward a scanning lens at a second deflection angle which is larger than the first deflection angle.

The embodiment of the invention discloses a scanning actuator and an optical fiber scanner, the scanning actuator at least comprises an actuating base body and an electrode used for driving, the actuating base body has a set length in the axial direction from the rear end to the front end, the rear end is used as a fixed end, and the electrode is used for driving the actuating base body. A plurality of actuating arms which are mutually encircled and separated are formed in the axial direction of the actuating base body, the electrodes are distributed on the surface of each actuating arm in the axial direction, the front ends of the actuating arms are connected with one another through connecting structures, and during working, each actuating arm vibrates according to the set direction and the set frequency under the action of the electrodes. And the connecting structure is jointly driven to vibrate. Compared with an existing scanning actuator with a fast and slow axis structure, the optical fiber scanner manufactured by the scanning actuator in the scheme of the invention has the advantages that the controllability of the scanning track is higher, the scanning process is more stable, and the distortion of the scanning track is not easy to occur.

The invention discloses a calibration device for a scanning system and a calibration method of the calibration device. The calibration device comprises a detection laser, a control system and a photoelectric position sensor which is arranged at the top of a powder spreading mechanism and can move in the direction perpendicular to the powder spreading direction; the photoelectric position sensor sequentially moves to a plurality of corresponding detection points under the control of the control system; and when the photoelectric position sensor moves to the corresponding detection points, the deflection of the scanning system is controlled to enable the detection laser to enter the photoelectric position sensor under the deflection of the scanning system, the detection information of the photoelectric position sensor is obtained in sequence, and the scanning system is calibrated according to the detection information. Only the photoelectric position sensor needs to be installed on the existing powder spreading mechanism, automatic calibration can be conducted in combination with software; and the calibration device is simple in structure and low in cost; errors caused by a large amount of manual operation are avoided, and good stability and precision are achieved.

The invention provides a laser radar system, and the system comprises a laser transmitting module which is used for transmitting a detection laser beam; a first reflection unit which is used for receiving and changing the transmission direction of the detection laser beam emitted by the laser emission module; a second reflection unit which is used for reflecting the detection laser beam reflected by the first reflection unit to a to-be-detected target and receiving and reflecting an echo signal reflected by the to-be-detected target; a laser receiving module which is used for receiving and processing the echo signal transmitted by the second reflecting unit, wherein the first reflection unit is located between the second reflection unit and the laser receiving module, and the effective reflection area of the first reflection unit is smaller than that of the second reflection unit. According to the invention, the defect that a non-coaxial laser radar has a close-range optical detection blind area is overcome, and a relatively high signal-to-noise ratio during close-range detection can be ensured.