118results about How to "Small field of view" patented technology

A focus detection device includes an image sensor and a plurality of lenslets. Each of the plurality of lenslets has a distinct conjugate length and is associated with a distinct portion of the image sensor.

An apparatus and method acquires and stores multiple resolution images from a specimen on a support and provides to the user a low magnification, reconstructed macro image of the entire specimen, or a large portion thereof, to aid the person in selecting points of interest to be viewed or analyzed at higher magnifications and resolution. The reconstructed image is formed of a large number of tiled, stored images which are coordinated and assembled to form the macro image of the specimen which is displayed on a monitor. Preferably, the stored, reconstructed image is reduced further in size by a software system before it is displayed to the user. The display may be on a local monitor over a local area network or sent over the Internet to the user who is typically a pathologist. The user selects by a marker such as a cursor the defined area of interest or region and then views higher magnification images or has them analyzed. Preferably, the pathologist can scroll to shift digitized, adjacent image tiles into view on the monitor. A fully computer-controlled microscope is used to acquire and store the digitized images and the illustrated microscope can be remotely controlled to change objective lenses, focus, light intensity, filters, field diaphragm, and to shift the microscope stage by a controller.

This invention provides a large field of view global measurement method using a coordinates tracking control board, belonging to the visual measurement field. The method employs a coordinates tracking control board installed on an adapter bracket, effectively integrates a visual measuring device and a laser tracker under the condition of not sharing a same field of view, and separates and calibrates internal and external parameters of left and right cameras to build an overall coordination system of a measurement scene so as to complete overall measurement based on a large field of view. The method can realize rapid and highly accurate measurement of large parts under a complex operating condition in a large field of view scope, is a measurement mode combining a plurality of types of optical components. The measurement method has the characteristics of large field of view and high efficiency, and can conveniently measure covered parts of target components, and rapidly complete large field of view global measurement in the industrial field.

The invention provides a laser radar and a working method thereof. The laser radar comprises a transmitting device, a beam splitting device, a galvanometer and a receiving device, wherein the transmitting device is used for transmitting a first laser beam to a to-be-detected object; the beam splitting device is used for splitting the first laser beam into a plurality of second laser beams, and thepropagation directions of the multiple second laser beams are different; the galvanometer comprises a first reflecting surface, the first reflecting surface is used for reflecting the second laser beams, the galvanometer is provided with a first rotary shaft and is rotated around the first rotary shaft, and an included angle between the first rotary shaft and a normal line of the first reflectingsurface is greater than zero; the receiving device is used for receiving echo beams reflected by the to-be-detected object. The laser radar has the advantage that the larger field angle can be obtained through smaller rotation angle of the galvanometer.

A single dual mode monolithic focal plane array having an active sensor and a passive sensing capability is switched from one mode to the other by switching the bias across the cells of the array from a passive IR mode to an active LADAR mode, with the monolithic dual mode focal plane array having applications in missile target seekers and laser target designators. The switching is accomplished by increasing the gain of the array by as much as 30 times that associated with IR detection when laser return pulses are expected. Thus, there need be no mechanical changes to the array to afford both passive IR sensing and an active LADAR pulse detector. Nor need there be two different focal plane arrays, one for IR and one for laser radiation, which leads to boresighted alignment problems.

The invention discloses a dual-window electronic map service system with a magnifier window and based on Internet, as well as a relevant method. Global and detailed exhibitions can be fulfilled simultaneously. The technical scheme is as follows: The system comprises a client end, the first map storage device and a relevant process device, the second map storage device and a relevant process device, and a synchronism device; wherein, the client end comprises the first map exhibition window, the second map exhibition window and a map service relevant page. The first map storage device comprises the first map database and the first correlated database; the first map process device comprises the first map call module and the first map engine module. The second map storage device comprises the second map database and the second correlated database; the second map process device comprises the second map call module and the second map engine module. The synchronism device comprises a coordinate conversion module and an operation synchronism module. The invention adapts to the field of of Internet electronic maps.

The invention discloses a large-view-field off-axis three-mirror optical system. The system comprises a first mirror with the negative lens power, a second mirror with the negative lens power, a third mirror and a detector with the positive lens power, wherein the first mirror is opposite to a target light beam incident port, the second mirror is arranged on the reflection optical path of the first mirror, and an aperture diaphragm is arranged on the surface of the second mirror; the third mirror is arranged on the reflection optical path of the second mirror; the detector is used for receiving reflection light of the third mirror. The negative-negative-positive anti-far-distance mode is adopted to the structure of the large-view-field off-axis three-mirror optical system, off-axis light large in view field firstly passes the mirrors with the negative lens power and is diverged, the view field of emitted light is reduced relative to the mirror with the positive lens power, that is, more off-axis light larger in view field can enter the mirror with the positive lens power and is received by the detector, and accordingly the aim of enlarging the view field is achieved.

The invention provides an optical imaging lens, which comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens sequentially from the object side to the image side and satisfies the following relational expressions: 1<=EFL/TTL and TTL<=18mm. By controlling the arrangement of the concave and convex surfaces of the lenses and using at least one relational expression to control relevant parameters, the length of the optical imaging lens is shortened under the condition of maintaining good optical performance. The optical imaging lens of the invention is used in optical imaging.

A three-dimensional display system (10) comprises a display housing (24) and a plurality of projectors (12) for projecting two-dimensional images (102) into a space, each projector (12) having means to adjust the distance between the projector (12) and the projected image (102), and each projector (12) being pivotally mounted to the display housing (24), for adjusting the horizontal and vertical position of the projected two-dimensional image (102) with respect to the projector (12). The display provides a high-resolution, three-dimensional multi-coloured image which can be touched safely by the viewer. The display may be respond to physical objects in the display area by altering the image. The display may be used to operate a computer and browse the world wide web.

An optical imaging lens system includes five lens elements which are, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element and a fifth lens element. The first lens element has positive refractive power. The second lens element has negative refractive power. The third lens element has positive refractive power. The fourth lens element has negative refractive power. The fifth lens element with negative refractive power can have an object-side surface being concave in a paraxial region thereof.

In a method for image data acquisition of a region of interest in a subject with a magnetic resonance device, wherein, to establish the field of view, a minimal geometric shape encompassing the subject to be acquired and/or the surface of the subject is determined automatically from previously acquired localizer exposures as aliasing information for each exposure, at least one slice plane is determined for the acquisition of the region, and the phase coding direction and/or the extent of the field of view in the phase coding direction is determined for every slice plane using the aliasing information.

The invention discloses an optical lens. The optical lens sequentially comprises, from the object side to the image side, a first lens which has positive focal power and of which the convex side faces the object side, a second lens of which the convex side faces the object side, a biconcave third lens, a fourth lens which has positive focal power, a fifth lens, and a sixth lens. The optical lens provided by the invention has the advantages of high resolution, small distortion, large aperture and small size. Moreover, the focal length is relatively large, the field range is reduced, the details of the object can be observed better under the condition of same image plane size, and the demand for small-field observation is satisfied.

The invention discloses a spectroscope type corona ultraviolet detector. The spectroscope type corona ultraviolet detector comprises a telephoto lens, a spectroscope, an ultraviolet detector, an ultraviolet signal processing circuit, a liquid crystal display screen, an area array charge coupled device (CCD) and an image processing circuit. The telephoto lens and the area array CCD share the same optical axis, the spectroscope is arranged between the telephoto lens and the area array CCD, a 45-degree included angle is formed between a mirror face of the spectroscope and the optical axis of the ultraviolet detector, and the spectroscope 2 adopts a lens which can be transmitted by visible light of 380-760nm wave band so that ultraviolet light of 100-380nm wave band can be reflected. Light rays transmitting the telephoto lens are divided into two branches by the spectroscope, one branch is ultraviolet light, and the other branch is visible light. The ultraviolet is reflected on a photosensitive face of the ultraviolet detector through the spectroscope, and the other branch of the visible light emits on a photosensitive face of the area array CCD 6 after being transmitted by the spectroscope. The spectroscope type corona ultraviolet detector has the advantages that imaging display of a discharging insulator can be achieved, meanwhile, discharging ultraviolet radiation intensity can be displayed, and therefore the purpose of accurate positioning of a discharging position of the discharging insulator can be achieved.

The invention discloses a laser radar scanning method and a laser radar. The laser radar scanning method comprises the following steps that: according to a preset time interval, alternately emitting anear-frame light beam and a far-frame light beam, wherein the near-frame light beam has first field-of-view width A1 and first pulse frequency F1, the far-frame light beam has second field-of-view width A2 and second pulse frequency F2, A1 is greater than A2, and F1 is greater than F2. By use of the technical scheme provided by the embodiment of the invention, the near-frame light beam and the far-frame light beam are alternately emitted, different field-of-view widths and pulse frequencies can be used for meeting the detection requirements of different detection distances, and meanwhile, thescanning method is simple and is favorable for lowering requirements on production debugging.

The invention discloses an array camera observation method for detecting a structure surface in turbid media, and the method employs a camera array device, can greatly reduce the observation distance under the condition that the size of a view field is not changed and improves the imaging resolution, so as to achieve a purpose of carrying out the clear imaging of the structure surface in the turbid media. The method comprises the following steps: calibrating all cameras through employing a coding point calibration plate, and obtaining the internal parameter matrix and distortion parameter matrix of each camera and a rotating matrix and translation matrix of a camera coordinate system and the world coordinate system; calculating an ideal internal parameter matrix of a camera array; calculating an image homography transformation matrix; carrying out the correction calculation of optical centers of the camera; carrying out the correction calculation of lens distortion; carrying out the calculation of the mapping relation between a single camera image and an array image, i.e., a look-up table; and carrying out the high-resolution imaging display and detection of the structure surface.

The astigmatism eliminating three-reflector system provided by the present invention aims at facilitating the machining and regulation of reflective optical system and reducing its development cost. The astigmatism eliminating three-reflector system includes three, primary, secondary and the third, reflectors with one common optical axis, the primary reflector and the third reflector are spherical mirror, and the secondary reflector has quadric oblate spherical reflecting surface. It system also has ar aperture diaphragm, and has abxial working field of view. The parallel light beam incident to the primary reflector is thrice reflected in the primary reflector, secondary reflector and the third reflector successively to image in the image plane. The present invention is easy to regulate and low in cost, and has relatively working field of view.

The invention belongs to eye guard headgear display system, including a aperture diaphragm, the first lens, the second lens, the third lens, a lens group and a display. It adopts OLED or AMLCD as the image source. It has small volume, light weight, high distinguishability and wide view field. And it is not connected with high pressure. The volume of the ocular system is small and the weight is light. When the tiny display of small size and high image element is adopted, the ocular with the big exit pupil diameter and the big eye point distance is certain to lead big incidence angle and high project to bring big high-level image error. The invention uses the second lens, the third lens and the fourth lens to compress beam. The first lens and the fifth lens balance the image error led by the second, the third and the fourth lens to gain the ocular system of the big exit pupil diameter, the big eye point distance and the big view field. The display and the ocular group form the eye guard headgear display system. It has big view field, light weight, small volume and is used safely and conveniently.

The invention provides a subway carriage crowding degree display system self-powered by the wind power of a subway station, and a method thereof. The system comprises: a wind energy collection moduleused for collecting the wind energy in the subway station and converting the wind energy into electric energy to supply power to the display system; an image recognition system composed of a web camera and a TCP server established on the basis of python, and used for obtaining a timing image by using the web camera, recognizing the number of people after a python server receives the image to obtain statistical data of the number of people, and sending the statistical data of the number of people to a display part after receiving a request of the display part; and the display part composed of aWiFi module, a single chip microcomputer development board and an RGB touch screen, and capable of receiving the data sent from the server and displaying the data on the screen. The subway carriage crowding degree display system provided by the invention utilizes the wind power self-power supply technology, thereby being more energy-saving and emission-reducing, having high anti-interference ability, and having the characteristics of high detection accuracy, high detection speed, etc.