96results about "Photometry using wholly visual means" patented technology

The invention relates to a laser facula measuring device and a measuring method thereof. The device consists of a DMD micro-mirror array, a digital camera, an exposure control unit and a picture digital processor. The exposure control unit is provided with two output ends which respectively output signals to control the DMD micro-mirror array and the digital camera; and the input end of the picture digital processor is connected with the video signal output end of the digital camera. In the method, DMD micro-mirror array components are utilized, so the characteristics of an incident light path can be changed at different times and in different regions so as to accurately control the exposure process and obtain a laser beam detection image with high dynamic range; and by means of data processing, diameter, ellipticity, position, center, three-dimensional outline, power, and other parameters of the facula can be obtained. As the whole process happens within a short time, the defect that the position and the energy state of the laser facula changes as time goes by can be avoided, and light beam quality of the laser beam can be more accurately measured.

An optical projection tomography system is illuminated with a light source. An object-containing tube, a portion of which is located within the region illuminated by the light source, contains an object of interest that has a feature of interest. A detector is located to receive emerging radiation from the object of interest. A lens, including optical field extension elements, is located in the optical path between the object region and the detector, such that light rays from multiple object planes in the object-containing tube simultaneously focus on the detector. The object-containing tube moves relatively to the detector and the lens operate to provide multiple views of the object region for producing an image of the feature of interest at each view.

A display driven by a data signal and a light emission signal may be controlled by a control system including a first through fourth controller. The first controller may select a gamma value in accordance with ambient illumination and output a corresponding gamma compensation signal to control a gradation voltage of input image data. The second controller may compare the ambient illumination with a reference value, generate a selection signal in response thereto, and provide changed image data obtained by changing input image data in accordance with the selection signal as the data signal. The third controller may apply a scaling factor to the input image data generated from extracted features related to the input image data and a scale ratio obtained from the extracted features, and output scaled image data as the data signal. The fourth controller may control a pulse width of the emission control signal.

The input light settings in many vision systems often do not correspond to fixed output light intensities. The relationships between the measured output light intensity and the input light intensity are inconsistent between vision systems or within a single vision system over time. This inconsistency makes it difficult to interchange part-programs even between visions systems of one model of vision systems, because a part program with one set of light intensity values might produce images of varying brightness on another vision system. However, many measurements depend on the brightness of the image. To solve this problem, a reference lighting curve is generated for a reference vision system, relating an input light intensity value to a resulting output light intensity. A corresponding specific lighting curve is generated for a specific vision system that corresponds to the reference vision system. A calibration function is determined that converts a reference input light intensity value into a specific input light intensity value. Accordingly, when an input light intensity value is input, the specific vision system is driven at a corresponding specific input light intensity value such that the output light intensity of the specific vision system is essentially the same as the output light intensity of the reference vision system when the reference vision system is driven at the input light intensity value. Thus, in a vision system calibrated using these lighting calibration systems and methods, the specific lighting behavior of that vision system is modified to follow a pre-defined, or reference, lighting behavior.

An organic electro luminescence display and driving method uses an image determination unit to generate image determination signals indicative of whether images generated in response to data signals are moving images still images, selects a gamma value corresponding to the brightness of the ambient light sensed, applies gamma correction signals corresponding to selected gamma values to control grey level voltages of the data signals, generates a selection signal based on a comparison of a previously set reference value with the photo sensor signal, and generates R′,G′,B′ data to vary an input image RGB data to correspond to the selection signal, varies a change range of the changing R′,G′,B′ data to correspond to the image determination signal, and supplies the varied change range of the changing data (R′,G′,B′ data) to the data driver.

An organic light emitting diode (OLED) display, including a pixel portion having a plurality of pixels connected to scan lines and data lines, a scan driver adapted to generate and supply scan signals to the scan lines, a data driver adapted to generate and supply data signals to the data lines, an optical sensor adapted to generate an optical sensing signal according to an intensity of light, and a data converter adapted to store input image data or changed data from the input image data corresponding with the optical sensing signal. The data driver may be adapted to generate the data signal corresponding to the input image data or the changed data.

An organic light emitting diode (OLED) display includes an illuminance sensing unit configured to sense an external illuminance, a brightness determination unit configured to determine a brightness of the OLED display according to an illuminance sensed by the illuminance sensing unit, a driving voltage determination unit configured to determine a driving voltage corresponding with a current saturation point of the OLED display, the driving voltage being determined based at least in part on a driving current and the brightness determined by the brightness determination unit, a voltage conversion unit configured to receive an input voltage, generate a first voltage higher than the input voltage, and generate a second voltage lower than the input voltage, and a display unit configured to receive the first and second voltages from the voltage conversion unit and display an image.

A memory module comprises at least one memory device, a clock generator providing clocking signals, and a clocking topology providing the clocking signals to said at least one memory device.

A laser energy sensor and methodology for measuring laser energy in a laser beam by photoacoustic means. Laser energy is converted into acoustic energy which is then measured and converted to an energy reading corresponding to the energy of a laser beam.

An apparatus is provided for measuring viewing angle characteristic of luminance and positional characteristic of a radiant object under measurement, by moving a condensing device and an imaging device relative to the object. The apparatus includes a first mechanism for moving the light receiving elements of the condensing device while keeping constant the solid angle subtended by the light receiving element at the radiant area. A second mechanism is provided for moving the imaging device in association with the condensing device, while maintaining thereon the image of the radiant area. A memory is provide. A circuit is provided for calculating viewing angle dependent and position dependent characteristics. A display device is provided for displaying radiance characteristic and distribution characteristic of the object and the result of evaluation of the calculated characteristic of luminance.

A writing error diagnosis method for a charged beam photolithography apparatus and a charged beam photolithography apparatus which can specify an error cause within a short period of time in occurrence of a pattern writing error are provided. The writing error diagnosis method for a charged beam photolithography apparatus is a writing error diagnosis method for a charged beam photolithography apparatus which irradiates a charged beam on a target object to write a desired pattern. Processing result data of a pattern writing circuit at a position where a pattern writing error occurs is collected after the pattern writing error occurs, and the collected processing result data of the pattern writing circuit is compared with correct data. The charged beam photolithography apparatus has means which realizes the diagnosis method.

The invention discloses a method for automatically detecting the flameout of the flame in the hearth of a boiler/drying furnace, and a protection system. The protection system comprises a camera probe which can monitor the working conditions in the furnace; a gas, water and electricity field control box; an alarm control box which is used for generating alarm signals and withdraws the cover of the probe out of the hearth when the working temperature of the cooled water, cooled gas and probe of the system is unusual; and a flameout automatic protection unit which is used for moving the transmission device of the probe sleeve, judging the intensity and length of the flame according to the collected video image, emitting the alarm signal when the flame is unusual and outputting the control signal to the electric control system of the boiler/drying furnace. The automatic protection system for the flameout of the flame can carry out video monitoring to a plurality of flames in the furnace simultaneously, carries out the analysis to the videos, automatically measures the length of the flame, carries out the feedback output of the signal according to the intensity of the flame, realizes the automatic protection alarming when flameout, provides the control signal to the control system of the equipment and realizes the intelligentization of video monitoring.

An optochemical sensor for measuring concentrations of analytes is provided with a reactive matrix preferably made of polymeric material capable of swelling. Further provided are a mirror layer and a layer of a plurality of discrete islands that are electrically conductive, between which layers the reactive matrix is positioned, the diameter of the islands being smaller than the wavelength of the light employed for monitoring and evaluation.

The present invention belongs to the adaptive optics technical field, and relates to a wavefront reconstruction algorithm under a condition that first six Zernike patterns exist in the subapertures of a Hartmann wavefront detector. According to the ideas of the wavefront reconstruction algorithm, a back camera in the Hartmann detector is arranged on the defocus plane of a microlens array; a light spot is made to be expanded; the sub-wavefronts which go through low-order distortion are obtained through using the light intensity distribution of the light spot. Analog computation is performed on the optical response of the second Zernike pattern to the sixth Zernike pattern according to the subapertures of the Hartmann wavefront detector, which is just indicated by a figure 1 in the descriptions of the invention, and therefore, a subaperture response matrix can be obtained; the Zernike pattern response light spot array of the overall wavefronts can be measured through using a traditional method; the pattern coefficient vector of each sub-wavefront is solved through the subaperture response matrix; each pixel of the overall wavefront response matrix is composed of the pattern coefficient vectors of the sub-wavefronts; and the overall wavefront constructed by using the response matrix can maintain the high resolution of adaptive optical imaging and improve wavefront detection sensitivity.

A monitoring system and method include at least one monitor including an internal communication unit, and at least one mobile device that is in communication with the internal communication unit of the monitor. The monitor(s) transmits monitoring data to the mobile device(s) through the internal communication unit. The system and method may also include an external communication unit that is separate and distinct from the monitor(s). The external communication unit receives the monitoring data from the monitor(s) and relays the monitoring data to the mobile device(s).

A stored light intensity measurement device capable of measuring an afterglow intensity from a light storing sign in a simple way, even if the light storing sign is provided on walls or risers of stairs in facilities or underground shopping mall. The stored light intensity measurement device comprising the light measuring unit configured o measure afterglow from a part of a light storing section on a light storing sign, and calculation means for calculating an afterglow intensity from the light storing sign based on the measured results.

An illumination evaluation device which evaluates an illumination environment from an arbitrary light source comprises: a visual sign presentation means for presenting, in arbitrary examination locations upon an illumination face (12) whereupon illumination light emitted from a light source is projected, visual signs (13) for acquiring a contrast sensitivity of an observer who views the illumination face (12); and an examination result recording means for acquiring contrast sensitivity values when the observer has viewed the visual signs (13) which are presented by the visual sign presentation means and recording the acquired contrast sensitivity values and location information of the examination locations. An observability of the arbitrary locations upon the illumination face (12) of the light source is evaluated from the contrast sensitivity values.

The invention provides a highway tunnel illumination brightness rapid detection device and method. The device includes a vehicle body. A vehicle bracket is arranged at the front end of the top of thevehicle body. Three line scanning vision sensors are transversely arranged on the vehicle bracket, and the three line scanning vision sensors are respectively used for collecting gray images of the pavement, the left side wall and the right side wall of a tunnel by means of line scanning imaging. A surface scanning vision sensor is arranged on the front windshield of the vehicle body, and the surface scanning vision sensor is used for collecting a driving view image of the driver. The three line scanning vision sensors and the surface scanning vision sensor are connected with an industrial personal computer. Image data is continuously and rapidly collected in the process of driving in a tunnel, and thus, the pavement brightness, the side wall brightness and the driver's driving field brightness can be accurately measured. Therefore, traffic congestion and safety problems caused by a closed or a semi-closed tunnel are avoided, and the time cost and manpower cost for illumination detection are reduced.