68results about How to "High focusing precision" patented technology

The invention discloses a precision focusing mechanism taking a linear motor and grating rulers as servo elements, and relates to the field of precision focusing. The precision focusing mechanism comprises a fixed lens barrel (1), a mobile lens barrel (2), the linear motor (3), a motor fixing seat (4), a clearance eliminating nut (5), a connection ball head (6), a radial bearing (7), a bearing gland (8), a motor connection block (9), a master grating ruler (10), a slave grating ruler (11), a connection sheet (12), a grating connection block (13), a photoelectric switch limiting mechanism (14), a limiting sheet (15) and a grating seat (16). The precision focusing mechanism has the beneficial effects that: a backlash error caused by motor screw rod transmission can be eliminated effectively, an error caused by a transmission loop of the conventional displacement sensor is reduced, and the focusing precision is improved; and furthermore, a motor screw rod is not influenced by a bending torque, so that the motor is protected.

The invention, which belongs to the optical focusing field, discloses a cam focusing mechanism employing a backlash elimination gear. The focusing mechanism comprises: a straight line groove sleeve, a gear-cam groove sleeve, a backlash elimination gear, a focusing pin, a fastening nail, a spring and a flange assembly. An optical assembly is sleeved in the straight line groove sleeve. The gear-cam groove sleeve is sleeved out of the straight line groove sleeve and steel balls are arranged between the gear-cam groove sleeve and the straight line groove sleeve. The gear-cam groove sleeve, the backlash elimination gear, the fastening nail and the spring form a gear backlash elimination mechanism. A camera is connected with the straight line groove sleeve through the flange assembly. Optical focusing is achieved through motor drive, gear backlash elimination mechanism transmission and optical assembly movements driven by the focusing pin. In the invention, the gear backlash elimination mechanism is adopted to eliminate a hysteresis error of gear drive and raise focusing precision. And the cam focusing mechanism is connected with the camera through the flange assembly so that a verticality of an optical axis of an optical path and a camera image surface can be conveniently adjusted.

The invention discloses a focusing mechanism of a monitoring lens. The focusing mechanism comprises a supporting seat, wherein a circular through hole is formed at the middle of the supporting seat, a rotating sleeve is sleeved in the circular through hole, a lens connecting sleeve is sleeved at the middle of the rotating sleeve, at least one helical guide hole is formed on the outer circumferential surface of the rotating sleeve, at least one strip-shaped guide groove is distributed on the inner wall of the circular through hole along the axial direction, a driving gear is installed at the outer side of the supporting seat, a driven gear is arranged at the end part of the rotating sleeve to be matched with the driving gear, a guide pin is fixed on the lens connecting sleeve along the radial direction, one end of the guide pin penetrates through the helical guide hole to be matched with the guide groove; preferably, three helical guide holes are uniformly distributed along the outer circumferential surface of the rotating sleeve, and three strip-shaped guide grooves are uniformly distributed on the inner wall of the circular through hole along the axial direction; the driving gear is connected with a step motor through a retarding mechanism fixed with the supporting seat. The focusing mechanism disclosed by the invention is convenient to focus, capable of realizing automatic focusing of the monitoring lens and high in focusing precision.

The invention relates to a CCD focusing mechanism for a visible optical imaging system, and belongs to the field of adjustment for compensating camera focal plane defocusing. The CCD focusing mechanism is provided in order to solve a technical problem of camera focal plane defocusing of a visible television measuring system, and is characterized in that a stepper motor drives a lead screw shaft, a CCD mounting base is driven through transmission of a lead screw nut, the CCD mounting base slides on a guide rail through a guide rail sliding block, a linear potentiometer detects the position of the CCD mounting base in real time, and the CCD focusing mechanism for the visible light imaging system realizes translation focusing. The CCD focusing mechanism can operate steadily and smoothly within a range of -40 DEG C and +60 DEG C, does not get stuck, has the prominent advantages of high focusing accuracy, high carrying capacity, large stroke range and good environment adaptability, and can be applied to adjustment and compensation for camera focal plane defocusing caused by the factors such as the temperature, acting target distance variations, air pressure and vibration.

An adaptive focusing optical system comprises an optical body mechanism, an electric control box and an adaptive focusing mechanism. The optical body mechanism comprises a lens cone and an optical lens component and is used for acquiring optical image information of a target. The electric control box comprises a detector, an image processor and a controller which are connected in sequence, and is used for realizing focusing control, wherein the detector is installed at the joint of the electric control box and the optical body mechanism, the image processor is used for generating defocus criterion information according to digital image information and sending a corresponding control command to the controller, and the controller is connected with the adaptive focusing mechanism. A linear guide slot is arranged between a lens cone supporting module of the adaptive focusing mechanism and the lens cone of the optical body mechanism, a piezoelectric ceramic driving module is connected to the lens cone through a rigid push rod, and the adaptive focusing mechanism adjusts the position of the lens cone according to a received control signal to realize adaptive focusing.

The invention discloses an electro-optical system with adjustable focus. The electro-optical system at least comprises a body, a lens assembly arranged on the body, a light sensing assembly arranged with optical axis the same as that of the lens assembly, and a manual focusing structure, wherein the light sensing assembly and the manual focusing structure are arranged in a linked manner to adjust the focus between the light sensing assembly and the lens assembly. The invention also discloses an electronic otoscope applying the electro-optical system with adjustable focus. According to the invention, as the manual focusing structure is arranged, the focus can be adjusted manually in time according to the actual visual effect of the user in focusing operation, particularly, fine focus delayed in response of the existing electronic focusing structure can be adjusted, thereby having the beneficial effects of being high in focusing precision, convenient in focusing operation and the like.

The invention discloses a focusing method of a focusing device which is applied to a carbon dioxide (CO2) laser marking machine. The focusing device comprises a device system and a device system control system. A specific adjusting distance value is inputted through a keystroke, a pulse width modulation (PWM) pulse is outputted by a main control panel according to a set value to control a stepper motor driving device, and the stepper motor driving device drives a stepper motor to drive an optical lens holding device to move so as to change a focus; or the specific adjusting distance value is inputted through host computer software, the main control panel is communicated with the host computer software through a serial port, the main control panel outputs the PWM pulse according to the set value to control the stepper motor driving device, and the stepper motor driving device drives the stepper motor so as to drive the optical lens holding device to move and change the focus. The focusing device system has the characteristics of fast response speed, high precision, convenience in operation, high efficiency and the like.

The invention provides a processing visual device for a light-emitting diode (LED) laser cutting-up machine and relates to the technical field of laser cutting-up machines. The processing visual device mainly comprises a front alignment optical path and a bottom alignment optical path; the front alignment optical path is coaxial with a laser processing optical path and used for identifying and positioning the back of a transparent wafer and monitoring processing in real time; the bottom alignment optical path is coaxial with the laser processing optical path and used for identifying and positioning the front of a special coarsened wafer; and a bottom alignment lens is arranged at the bottom of a wafer chuck (24) and is coaxial with the front alignment lens; and the wafer is arranged on the wafer chuck (24) with an upward back. The front alignment of the wafer can be realized, the cutting-up process requirements of the coarsened wafer can be met in a mode of back cutting-up of the wafer, and the identification and alignment, and scratch monitoring of different wafers can be performed so as to contribute to improving production quality and automation degree. The wafer can be accurately focused by a laser focusing optical path and the cost is relatively low.

The invention discloses a laser coupling focusing mechanism and relates to the field of optical instruments. The device is technically characterized by comprising a fine adjustment sleeve, a main lenscone, a coupling lens group lens cone, a guide rod, a compression spring, multiple locking screws, an optical fiber connector seat, an optical fiber connector, a fixing screw, a pair of lenses A, a space ring A, a lens B, a space ring B and a pressing ring, wherein the main lens cone is arranged in the fine adjustment sleeve, the coupling lens group lens cone is arranged on the main lens cone, aleft end surface of the interior of the fine tuning lens cone is attached to a left end surface of the coupling lens group lens cone, a surface of the main lens cone is provided with a guide chute, the guide rod is sleeved in the guide chute on the main lens cone, the guide rod is fixed on an outer cylindrical surface of the coupling lens group lens cone through threads, a right end of the lens coupling lens group lens cone is provided with a spring mounting groove of the compression spring, a right end of a larger inner hole of the main lens cone is provided with a spring mounting groove, andthe compression spring is arranged between the two spring mounting grooves. The device is advantaged in that the structure is simple, machining cost is low, and adjustment is convenient.

The invention discloses a high-definition camera precise focusing platform and a focusing method, and aims at providing the high-definition camera precise focusing platform and the focusing method, which have excellent solidifying effect of dispensed glue and improve focusing efficiency and focusing precision. The high-definition camera precise focusing platform comprises a mounting plate, and anoptical device adjusting module, a five-axis motion module, a jacking and aligning module and a UV curing module are arranged on the mounting plate; a cooperative product carrier is arranged on the jacking and aligning module; the optical device adjusting module, the five-axis motion module and the UV solidifying module all cooperate with the product carrier; and the optical device adjusting module is located right above the product carrier. The platform and the method provided by the invention are applied to the technical field of camera assembling.

The invention discloses a microscope focusing device based on ultrasonic motor drive. An ultrasonic motor, bevel gears and bevel racks cooperate with one another to electrically control a support plate to move up and down, and the structure is very simple. During usage, the support plate can be controlled to move on any scale under the drive of the ultrasonic motor, so that the clearest focal length can be found out easily. The ultrasonic motor has no inertia during reciprocating, meanwhile, one adjusting mechanism is arranged between one bevel gear and the ultrasonic motor, one adjusting mechanism is arranged between the other bevel gear and an encoder, the bevel gears and the bevel racks can be always meshed closely by the aid of the adjusting mechanisms, and mechanical errors of a traditional structure are avoided when the support plate is controlled to move up and down. The ultrasonic motor, the bevel gears and the bevel racks cooperate with one another, the kinematic accuracy of the support plate is up to plus/minus 2 mu m through experiments, and the focusing accuracy of the focusing device is much higher than that of a traditional focusing structure.

The invention discloses multi-station rotary Demura equipment. The multi-station rotary Demura equipment comprises part replacing windows, Mura compensation devices and a rotary disc. 2n sets of bearing devices for containing display panels are symmetrically arranged on the rotary disc rotationally, one set of bearing devices in any two adjacent sets of bearing devices are located on the part replacing windows, the other set of bearing devices are located below the Mura compensation devices, when the rotary disc rotates by 360/2n degrees, the bearing devices located on the part replacing windows rotate below the Mura compensation devices, and the bearing devices located below the Mura compensation devices rotate to the part replacing windows. The multi-station rotary Demura equipment is simple in structure, convenient to use and high in automation degree, the Mura compensation devices and the rotary disc are integrated in a platform, in cooperation with the bearing devices, part replacing of the display panels is completed while Mura compensation of the display panels is achieved, and therefore the working efficiency of the equipment is improved.

The invention discloses a novel focusing non-blur lens module. A fixed mounting seat comprises a mounting seat base and a mounting seat sleeving part; the periphery of the mounting seat sleeving partis sleeved with an outer waveform elastic piece and an outer adjusting ring; the upper end part of the mounting seat sleeving part is provided with a cover plate; a mounting seat accommodating cavityof the fixed mounting seat is embedded with a lens frame; the core part of the lens frame is provided with a lens frame accommodating cavity; the lower end part of the inner wall of the lens frame accommodating cavity is provided with a lens frame flange; a spring located at the upper end side of the lens frame is also embedded in the mounting seat accommodating cavity; the lens frame accommodating cavity is internally embedded with an inner waveform elastic piece and a lens sleeve, and the lens sleeve is spinned in the lens frame; a focusing driving assembly is arranged beside the outer adjusting ring on the mounting seat base; the outer circumference of the lens frame is provided with a guiding piece; and the guiding piece passes through the sleeving part guiding hole in the mounting seat sleeving part and is inserted in an adjusting ring slope hole in the outer adjusting ring. Through the above structure, the novel focusing non-blur lens module has the advantages of novel structuredesign, good stability and reliability and high focusing precision, and a blur phenomenon can be effectively avoided.

The invention relates to an automatic focusing method for a digital optical imaging system, which comprises the following steps of: independently sampling and forecasting focusing evaluation function curves on left and right sides in the positions of focusing evaluation function curve peaks; calculating the position of an intersection point of the forecast left and right focusing evaluation function curves or a minimum value of an absolute value of a difference of the focusing evaluation function values in the same positions in the forecast left and right disperse focusing evaluation function value sequences; and controlling an executing mechanism to move a focal plane of the digital optical imaging system to the intersection point or minimum value position (focusing position). According to the automatic focusing method provided by the invention, independent sampling and forecasting are performed on left and right adjacent regions containing the peak position areas; a principle error caused by taking actually asymmetrical focusing evaluation function curves as symmetrical curves according to the automatic focusing method based on curve fitting and a swinging search process possibly occurring nearby the peaks according to a quick climbing method are avoided; the influence of sampling step length on the focusing precision according to the automatic focusing method based on bilateral forecasting intersection is small and the focusing precision and speed are higher.

The invention provides a multi-focus frequency domain OCT adaptive focusing device and a method thereof, and relates to the technical field of optical imaging. The device comprises an electric lifter.An object lens, a first half-transparent and half-reflection mirror, an eye lens and a second half-transparent and half-reflection mirror are successively arranged on a carrier plate. A light collecting mirror is arranged under a diaphragm. A white-light light source is arranged next to the light collecting mirror and is electrically connected with a computer through a wire. A first fiber collimating mirror, a second fiber collimating mirror, a third fiber collimating mirror and a fourth fiber collimating mirror are arranged next to the first half-transparent and half-reflection mirror. The first fiber collimating mirror, the second fiber collimating mirror, the third fiber collimating mirror and the fourth fiber collimating mirror are connected with an optical switch through wires. The beneficial effects are that it is ensured that the a micro-imaging system acquires high definition images; and meanwhile, it is achieved that clear view field area is increased and quite high focusingprecision is obtained in a field depth range.

The invention provides a low-cost ultra-short-focus projection lens, which comprises a refractor group and a reflector group, wherein the refractor group comprises a first lens group and a second lens group which only comprise spherical lenses, and a third lens group which at least comprises an aspherical lens. The low-cost ultra-short-focus projection lens has the advantages of few aspherical lenses and low cost.

A threaded focusing device disclosed by the present invention comprises a substrate, a CMOS module and a lens cone, wherein the substrate is equipped with a guiding counter bore, the CMOS module is fixed on the substrate, the lens cone comprises a guiding column and a plurality of first threaded holes, and the guiding counter bore on the substrate sleeves the guiding column on the substrate. The threaded focusing device also comprises a plurality of focusing bolts for connecting the lens cone and the substrate, and the position of the substrate can be adjusted along the direction of the guiding column by adjusting the focusing bolts. A threaded focusing mechanism of the present invention enables the focal length adjusting precision to be improved, enables the image quality to be improved,and enables the image quality not to be influenced by the outside world continuously and for a long time.

The invention relates to the technical field of optical systems, and particularly discloses a lens focusing mechanism. The lens focusing mechanism comprises a focusing bracelet, a fixed cylinder, at least one cylindrical pin and a cylindrical cam sleeve. Multiple threads are arranged on the outer cylindrical surface of the cylindrical cam sleeve, and multiple threads matched with the cylindrical cam sleeve are arranged on the inner side of the fixed cylinder. The cylindrical cam sleeve is radially provided with at least one cam groove, the cylindrical pins are radially uniformly distributed onthe outer circle of a lens barrel, and the cylindrical pins correspond to the cam grooves one by one. The fixed cylinder is fixedly connected with a lens, the cylindrical cam sleeve is sleeved with the fixed cylinder, the cylindrical cam sleeve is connected with the lens barrel through the cam grooves and the cylindrical pins, and the focusing bracelet is fixedly connected with the cylindrical cam sleeve. The focusing mechanism has the beneficial effects of effectively reducing friction, accurately focusing and being stable and reliable.