45results about How to "Reduced adjustment accuracy" patented technology

An image display apparatus and an image display method, by which a desired image formation state on a retina can be constantly maintained, are provided. Thus, the image display apparatus of the present invention includes a laser light source for emitting laser light; a focus position adjustment section for adjusting a focus position, of the laser light by adjusting a spread angle of the laser light emitted by the laser light source; a scanning section for scanning a predetermined to-be-scanned area by using the laser light adjusted by the focus position adjustment section as scanning light; a light deflection section disposed at the predetermined to-be-scanned area for leading the scanning light to a cornea of the user; a light detection section disposed at a position where the light detection section has an optically conjugate relation with a surface of the cornea through the light deflection section, for detecting a part the scanning light reflected on the surface of the cornea and generating a detection signal; and a control section for controlling the laser light source, the focus position adjustment section, and the scanning section, The control section controls the focus position adjustment section to adjust the focus position of the laser light such that the detection signal generated by the light detection section agrees with an initial setting signal that is set in advance by the light detection section during an initial setting operation.

This invention relates to one laser spot real time monitor and light path automatic calibration method and device, which uses single CCD camera head to collect laser spot, piezoelectricity electrical lens rack automatic calibration path by use of computer for spot process and real time monitor, wherein the device monitor spot frequency is about 10Hz and feedback control frequency is of 1Hz to eliminate and lower shake circle for float more than one second with stability less than 0. 5 micro arc degree in calibration laser space.

The invention discloses a magnetic control vibration isolation device. The magnetic control vibration isolation device comprises a magnetic control damping device and a magnetic control elastic device, wherein the magnetic control damping device comprises an outer sleeve inside which a first iron core is arranged, the first iron core is provided with a first magnet exciting coil, a connecting rod is fixedly connected with a first iron core, two ends of the connecting rods extend out of the outer sleeve respectively, and the inner cavity of the outer sleeve is filled with magnetorheological elastomers; the magnetic control elastic device comprises a second iron core, a third iron core and an connecting sleeve, two ends of the connecting sleeve are fixedly connected with the second iron core and the third iron core, the second iron core and the third iron core are respectively provided with second magnet exciting coils, a pressing plate is arranged between the second iron core and the third iron core, the portions between the pressing plate and the second iron core and the pressing plate between the third iron core are provided with first magnetorheological elastomers and second magnetorheological elastomers respectively; one end of the connecting rod penetrates the second iron core and the first magnetorheological elastomers to be connected with the pressing plate, and the second iron core is connected with the outer sleeve. The damping and elasticity modulus of the magnetic control vibration isolation device can be adjusted according to frequency of basic vibration, good vibration isolation performance can be obtained and vibration deterioration can be avoided.

The invention relates to a satellite image adjustment method and device based on plane constraint optimization virtual control points, and the method comprises the following steps: carrying out the image matching and gross error elimination according to a satellite image and a corresponding RPC file, and obtaining a connection point; constructing a plurality of three-dimensional image models, andcalculating ground three-dimensional coordinates of each connection point by utilizing spatial forward intersection in each three-dimensional image model; calculating the height difference of each connection point in different three-dimensional image models, and taking the connection points of which the height differences in the different three-dimensional image models are smaller than a preset height difference threshold value as virtual control points, the height difference being the difference between the elevation of the connection point in the different three-dimensional image models andthe elevation mean value of the connection point; and partitioning the three-dimensional image model, selecting an optimal virtual control point in each block, and carrying out satellite image adjustment. Compared with the prior art, topographic factors are considered when the virtual control points are selected, plane constraints are increased, and adjustment precision and efficiency are improved.

The invention relates to a continuous focusing high-energy laser emission tracking aiming system which comprises a laser, a beam splitter, a primary beam expanding system, a secondary beam expanding system and a fine tracking imaging subsystem. After being reflected by the beam splitter, laser emitted by the laser device is focused to a target after being expanded by the two stages of beam expanding systems in sequence. Light reflected by a target sequentially passes through the two stages of beam expanding systems to return, penetrates through the beam splitter and is focused and imaged by the fine tracking imaging subsystem. The primary beam expanding system comprises a transmission type system consisting of a focusing eyepiece and a fixed eyepiece; and the secondary beam expanding system comprises a reflective system consisting of a convex reflecting mirror and a concave reflecting mirror. According to the invention, two-stage beam expanding is adopted, so that the focusing beam is prevented from deviating from the central optical axis caused by focusing of a secondary mirror of a traditional off-axis reflection type beam expanding system; the fine tracking imaging subsystem and the two-stage beam expanding system are completely designed in a common aperture mode, and deviation of a laser emission axis and an aiming axis caused by the imbalance phenomenon of an optical system in the laser focusing adjustment process is avoided.

The invention provides an adjusting device and a nozzle frame. The adjusting device is mounted on a mounting plate and is used for carrying out position adjustment on workpieces positioned on the mounting plate; the adjusting device comprises a first limiting mechanism, a second limiting mechanism, a first adjusting mechanism and a second adjusting mechanism; the first limiting mechanism and the first adjusting mechanism are located on two opposite sides of each workpiece respectively, and the position of the corresponding workpiece in the X-axis direction is adjusted; and the second limitingmechanism and the second adjusting mechanism are located on two opposite sides of each workpiece respectively, and the position of the corresponding workpiece in the Y-axis direction is adjusted. According to the adjusting device and the nozzle frame, the workpieces are adjusted in the X-axis directions and the Y-axis directions correspondingly so that the consistency of the positions of the plurality of workpieces can be effectively ensured, and then the precision is improved.

The invention provides a multispectral imaging module and a portable display device, and relates to the technical field of imaging spectrum detection instruments, the multispectral imaging module comprises a primary mirror used for correcting aberration, a micro lens array, an array optical filter and a detector which are sequentially arranged along an optical path, the number of channels of the micro lens array corresponds to the number of channels of the array optical filter to form a plurality of imaging channels, the light beam emitted by the primary mirror sequentially passes through the micro-lens array and the array optical filter, so that light of different wavebands of the light beam is imaged at corresponding positions of the detector through the corresponding imaging channels, and multispectral imaging is achieved. A micro lens array mode is adopted, a data cube of an object can be obtained through one-time collection, spectral imaging of a moving object and an instant phenomenon can be achieved, one-time imaging is achieved, copying imaging of a scene target is achieved, and spectral information of the whole scene target passing through an array optical filter corresponding to the micro lens array is obtained; the device is small in size, low in weight, simple in structure, easy to machine and assemble, economical, convenient and capable of achieving productization.

The invention discloses an ultra-short-focus projection optical lens and an ultra-short-focus projection optical system; the ultra-short-focus projection optical lens comprises a shell, a refraction lens group and an aspheric reflector, wherein the refraction lens group and the aspheric reflector are mounted in an inner cavity of the housing and are sequentially and fixedly arranged in a refraction projection direction. An optical axis is correspondingly formed in the shell between the refraction lens group and the aspheric reflector, the refraction lens group sequentially comprises a first spherical lens, a second aspheric lens, a third spherical lens, a fourth spherical lens, a fifth spherical lens, a sixth spherical lens, a diaphragm, a seventh spherical lens, an eighth aspheric lens, aninth spherical lens, a tenth aspheric lens, an eleventh aspheric lens and a twelfth spherical lens from the object side to the image side. According to the technical scheme provided by the invention, at least twelve refraction lenses and one aspheric reflector are arranged, so that the requirements on the projection lens in the aspects of processing and adjustment precision are relatively low.

The invention discloses a head-mounted display device and a lens adjustment method. The device comprises an optometry module, a lens adjustment module, a control module and a display module, wherein the lens adjustment module comprises at least two lenses; the output end of the optometry module is connected to the input end of the control module, and the output end of the control module is connected to the control end of the lens adjustment module; and the optometry module detects the diopter of the user's eyes and sends the diopter to the control module, the control module generates a movement instruction according to the diopter and sends the movement instruction to the lens adjustment module, and the lens adjustment module controls the corresponding lens to move according to the movement instruction so as to enable the lens to drop into the display module. The embodiment of the invention improves the adjustment precision of the head-mounted display device.

The invention relates to a hatch cover testbed air inflow section with the adjustable airflow direction. The hatch cover testbed air inflow section comprises a front partition frame, a middle partition frame, a rear partition frame, a breather pipe, a splitter plate and adjusting devices. The front partition frame, the middle partition frame and the rear partition plate are all mounted on the outer side of the breather pipe, the splitter plate is fixedly mounted in the breather pipe, the plane direction of the splitter plate is consistent with the axis direction of the breather pipe, and the breather pipe is divided into an upper part and a lower part. The positions of adjusting plates can be precisely adjusted and fixed through the adjusting devices adopting thread adjusting, and the problem that the adjusting precision is not high in an existing scheme is solved. The two adjusting plates are independently controlled through the two sets of adjusting devices, independent control overairflow with different temperatures is achieved, and the problem about the adjusting precision of a temperature field in the existing scheme is solved.

An optical scanner having a micro-optical element for combining two light beams is disclosed. The optical scanner has a micro-optical element including two parts, which serves to combine two light beams emitted, by two beam sources on a photodetector. The first part of the micro-optical element influences the first light beam and the second part of the micro-optical element influences the second light beam.

The invention discloses an adjustable cloth dyeing machine nozzle. The adjustable cloth dyeing machine nozzle is characterized in that a water inlet is formed in a base; an outer nozzle and an inner nozzle are arranged in the base, and a nozzle gap is formed between the inner nozzle and the outer nozzle; a connecting rod is fixed on the inner nozzle and connected with one end of a swing arm through a through hole; the other end of the swing arm is connected to a spindle which is connected with a drive mechanism; the drive mechanism drives the spindle and drives the swing arm to rotate; the swing arm drives the inner nozzle through the connecting rod to move away from or get close to the outer nozzle. The outer nozzle is fixed, the connecting rod is fixed on the inner nozzle and connected with one end of the swing arm through the through hole, the other end of the swing arm is connected to the spindle, the spindle is connected with the drive mechanism, the drive mechanism drives the spindle and drives the swing arm to rotate, the swing arm drives the inner nozzle through the connecting rod to move away from or get close to the outer nozzle, and the nozzle gap between the outer nozzle and the inner nozzle is adjusted accordingly. The overall structure of the nozzle is simple, fewer parts are needed, and material cost is low.

An ejector is caused to eject a liquid such that first patterns are formed in a first direction on a medium while the ejector is moved outward, second patterns are formed in one-to-one correspondence with the first patterns with different first amounts of interval in the first direction from the first patterns while the ejector is moved backward, and a third pattern is formed in an end region that is at least a part of an end of the first patterns in the second direction and at least a part of an end of the second patterns in the second direction.

The invention provides a light weapon sight adjusting instrument. The adjusting instrument is composed of a clamping groove, a jacking block, a jacking rod and an operation handle; the clamping groove is a double-bottom U-shaped clamping groove or O-shaped clamping groove, the jacking block is mounted at one end of the clamping groove in movable connection manners of the threaded manner or clearance fit manner, the jacking rod is mounted at the other end of the clamping groove in a trapezoidal threaded manner, and the jacking block and the jacking rod are coaxially mounted; a through hole is formed in the outer end of the jacking rod and used for mounting of the operation handle. A boss is arranged in the middle of the jacking rod, and scales are arranged on the boss; a dedicated dial is arranged, and is locked on the outer side of the boss through a locking nut; during adjustment, one end of a sight star shaft of a sight is arranged in the groove of the jacking block, a sinking position of the other end of the sight star shaft is jacked by a positioning protrusion on the jacking rod, the jacking rod is driven by rotating the operation handle, changes of scale rules are observed, and precise adjustment of a light weapon sight is achieved. The adjusting instrument has the beneficial effects of being simple in structure, large in structural rigidity, high in adjusting precision, convenient to continuously adjust and the like.

To acquire a height positioning method of a magnetic head by which head height according to the pressing amount to a base plate is obtained, and variation of adjustment accuracy can be reduced.The height positioning method of a magnetic head includes a step to fix a magnetic head element to a front edge of a magnetic head supporting surface of the base plate in the state that it is made to project from the base plate; a step to hold the base plate by abutting the magnetic head supporting surface excluding a reference plane and a front edge of the base plate to a receiving block having a reference plane, and the head element and the front edge of the base board is made to project from the reference plane; and a step to adjust the height position of the magnetic head to the magnetic head supporting surface by sandwiching the base plate between receiving block reference plane to press from the pressure line set at an opposite face side of the magnetic head supporting surface to deform it.