104 results about "Optical axis deviation" patented technology

In this exposure system, alignment marks on a photosensitive material are photographed with a reading unit. Prior to this photographing, a standard board, having detection marks at positions readable to the reading unit at preset intervals along the movement direction of the reading unit, is provided. At least one of the detection marks is photographed with the reading unit, which is arranged in a position to photograph the alignment marks provided on the photosensitive material. Calibration data is calculated based on data on the camera optical axis deviation obtained by this photographing. Standard position data reflects the calibration data, whereby calibration of the exposure position adjustment function of the exposure device is performed.

In an optical disk recording device for projecting a recording light beam onto an optical disk to form 3T-11T pits in a land of the optical disk, timing to sample and hold a reflected light detection signal for tracking servo control is delayed behind timing to sample and hold the reflected light detection signal for wobble signal detection. Further, a sample-and-hold time period of the reflected light detection signal for tracking servo control is set to be shorter than a sample-and-hold time period of the reflected light detection signal for wobble signal detection. Such arrangements permit appropriate recording, even at high recording speeds, irrespective of residual optical axis deviations.

Distortion correction with different correction accuracy is performed on images acquired in accordance with an image pick-up mode for a 3D moving image, a 3D still image, and the like, and an image cut-out process corresponding to an optical axis deviation amount of each of right and left photographing optical systems is also performed thereon, whereby optical axis deviation is corrected. In this case, an optical axis deviation amount corresponding to a current image pick-up mode is read out from among optical axis deviation amounts after distortion correction, the optical axis deviation amounts being stored in advance into an EEPROM at the time of adjustment before shipment and corresponding to respective image pick-up modes. Distortion correction corresponding to the current image pick-up mode is performed on right and left images acquired in accordance with the current image pick-up mode. Then, a cut-out process of images for stereoscopic display from the images with a full angle of view after the distortion correction is also performed on the basis of the read-out optical axis deviation amount.

The invention discloses a target measuring method in ball machine video images. The method comprises the following steps: S0) obtaining visual field angle and optical axis deviation value of each ball machine under each multiplying power, and enabling the visual field angles, the optical axis deviation values and variable power subdivision steps of the ball machine to be generated into enquiry forms respectively, which are stored to a ball machine end; S1) obtaining a monitoring image, and then, obtaining a two-dimension coordinate of two points of a target needing to be subjected to height measurement or length measurement in the monitoring image, the two-dimension coordinate being a pixel coordinate in the monitoring image; S2) obtaining the current variable power subdivision step according to the current multiplying power of the ball machine, obtaining the current visual field angle and the optical axis deviation value from the enquiry forms and converting the two-dimension coordinate into a three-dimensional coordinate according to the visual field angle, the optical axis deviation value and PTZ information of the ball machine; and S3) measuring the length and height of the target according to the three-dimensional coordinate. The method is low in cost, wide in monitoring measurement surface and high in accuracy, can both measure the height of the target, but also measure the length thereof.

The invention discloses a spatial light-to-fiber coupling system. The system comprises a pyramid prism, an inclined reflector, a light splitter, a first lens, a three-dimensional translation table, a1*2 optical fiber beam splitter, a calibration laser device, a receiving terminal, a photoelectric detector, a second lens, a first driver, a control processor and a second driver. The principle thatthe pyramid prism can return incident light in the original direction is used, and the zero point of the fiber axis is calibrated through the calibration laser device and the pyramid prism. After thespace light to be coupled enters the photoelectric detector and a fiber branch, the control processor acquires light spot data of the photoelectric detector and controls the inclined reflector to moveby taking the zero point of the fiber axis as a benchmark, and the optical axis deviation between the spatial light and a fiber is corrected so that the spatial light can be coupled into the fiber. The system is used for correcting light beam jitter and the optical axis deviation caused by atmospheric disturbance, environment vibration, temperature and gravity changes and the like, the coupling efficiency of the spatial light and the fiber is improved, and the system has an important application prospects in the field of spatial laser communication.

A medical laser apparatus for performing treatment by irradiating an affected part with a laser beam comprises: a fiber laser source with variable output power, which emits an infrared fundamental laser beam; a wavelength converting element which wavelength-converts the fundamental beam to a visible second harmonic laser beam and is placed on an optical axis of the fundamental beam; a first incident angle changing unit which changes an incident angle of the fundamental beam to the wavelength converting element; an optical axis deviation correcting unit which corrects deviation of an optical axis of the second harmonic beam caused by a change of the incident angle of the fundamental beam to the wavelength converting element; and a controller which controls the first changing unit and the correcting unit based on a change in power of the fundamental beam.

The invention discloses an on-orbit self-calibration device of a space laser communication terminal and a calibration method of the on-orbit self-calibration device. The on-orbit self-calibration device comprises a beacon light emitting end, a first light splitting piece, a relay branch, a color separation piece, an optical antenna, a first reflecting mirror, a beacon light receiving end, a signallaser emitting end, a second light splitting piece, a second reflecting mirror and a signal laser receiving end. An all-optical reflecting prism is connected to an optical antenna, a transmitting optical path is returned to a receiving system of the all-optical reflecting prism along the original path, and relative deviation positions and deviation values of beacon light and signal laser transmitting and receiving optical axes of a laser communication terminal are subjected to rapid self-calibration. Optical axis deviation calibration is realized without cooperation of a ground optical communication system and other on-orbit satellite laser communication terminals, and rapid mutual positioning and tracking of the laser communication terminals are ensured through a deviation value algorithm compensation mode; and the labor, time, difficulty and cost of the debugging stage of the laser communication terminal during on-orbit operation of the satellite are greatly reduced.

A cut-out process of image corresponding to an amount of optical axis deviation of left and right imaging optical systems is applied to left and right images acquired by the left and right imaging units to correct an optical axis deviation. In this case, the amount of optical axis deviation corresponding to a current focus position is acquired from the amounts of optical axis deviation detected in accordance with focus positions stored in advance in a storage unit (step S38). A cut-out process of image for stereoscopic display is applied to the left and right images based on the acquired amount of optical axis deviation (step S40). As a result, the optical axis deviation of the left and right imaging optical systems can be excellently corrected regardless of the focus position (subject distance).

The invention discloses an automatic deviation correction method for an optical axis of a machine core of a camera. The automatic deviation correction method comprises the steps of preparing a background object on which cross curves are drawn, adjusting the multiplying power of the camera to the minimum and adjusting relative positions of the camera and the background object to enable the background object to be fill with the frame of the camera; controlling the multiplying power of the camera to the maximum; enabling the intersection of the cross curves in the camera frame to be overlapped with the intersection of the cross curves in the background object; finding the position of the intersection of the cross curves in the background object and calculating an optical axis deviation pixel difference value between the position of the intersection of the cross curves in the background object and the intersection of the cross curves of the camera frame in horizontal and vertical directions and in the presence of each multiplying power; judging whether the optical axis deviation pixel difference value between the position of the intersection of the cross curves in the background object and the intersection of the cross curves of the camera frame in the horizontal and vertical directions and in the presence of one test multiplying power is as same as the difference value in the presence of the last test multiplying power; if not, recording; and sending the recorded optical axis deviation pixel difference value to the camera. The automatic deviation correction method and system for the optical axis of the machine core of the camera are automatic and simple; and cost is saved.

The invention relates to a multi-optical-axis consistency detection device and method of a platform photoelectric device at any axial distance. The detection device comprises a semi-transparent semi-reflection mirror, a reflection mirror, a first position sensitive apparatus, a second position sensitive apparatus, an analog-digital converter, a CCD (charge coupled device) imaging assembly, an image collection card and a data control processing system. By adopting the detection device, an optical-axis deviation angle of each optical sensor of a detected platform photoelectric device can be calculated, the detection is not limited by the axial distance among the optical sensors, no cooperative target is needed, calibration and adjustment are avoided, the detection precision is high, the size is small, the weight is light, simplicity in operation can be realized, the automation degree is high, the online rapid optical-axis consistency detection requirement of multiple optical sensors of the platform photoelectric device in a field environment can be well met, and the popularization and application prospect is wide.

A vehicle headlamp device includes headlamps, which are structured so as to be able to project or irradiate given patterns and given shapes without distortion on a given virtual surface in front of a vehicle from a left headlight and a right headlight, respectively, a camera that captures an image of the area in front of the vehicle, and a state detecting portion configured to detect distortion of the given patterns, which are projected or irradiated on an irradiated surface in front of the vehicle, relative to the given patterns projected or irradiated on the given virtual surface in front of the vehicle, based on the captured image, and also detect a state of the irradiated surface based on the distortion, and a correcting portion configured to correct a relative optical axis deviation between the left headlight and the right headlight.

The invention discloses a high-accuracy laser ranging system performance measurement device and method. According to the method, a light splitting function of a dichroic beamsplitter is used, a reticule with a scale and a laser fiber end surface are equidistantly fixed at two sides of the dichroic beamsplitter, and through a fiber, laser generated by a delay echo generator module is transmitted toa detected device through a collimator. The device can be used to measure a laser divergence angle, spot energy and ranging capability of the laser ranging system and can also be used to calibrate the optical axis deviation of laser transmitting and receiving of the detected device. The device and the method disclosed in the invention are applicable to real-time calibration on the performance ofvarious laser ranging systems and are applicable to fields such as coaxial detection for transmitting and receiving of an active and passive-combined optoelectronic system. The system has a fixed focal plane module, the calibration method is simple, and the price is low.

The invention discloses a camera component and a mobile terminal. The camera component comprises a frame body and a camera module; the frame body comprises a substrate on which a through close to thetop edge of the substrate is formed, a top wall extending from the top edge, and a lug boss extending from the substrate, wherein the lug boss comprises a positioning plane towards the center of the through hole and a mounting plane connected with the positioning plane and opposite to the substrate, an empty slot is formed on the lug boss, and the empty slot extends to a direction far away from and vertical to the top wall from the positioning plane; the camera module penetrates the through hole and is propped against the mounting plane, the camera module and the side surface of the through hole are arranged at interval and the camera module is contacted with the positioning plane. In the camera module and the mobile terminal disclosed by the embodiment, the deformation caused by the collision and prop against between the displaced camera module and the positioning plane is avoided, thereby preventing the camera module from producing optical axis deviation and like faults, and guaranteeing the normal work of the camera module.

The invention relates to a large-caliber collimator of an airborne photoelectric aiming system and a detection method. The large-caliber collimator is used for accurately and rapidly detecting the optical axis parallelism of multi-sensor airborne photoelectric detection equipment carrying infrared, television, laser range finders and the like, an off-axis large-aperture long-focal-length collimator optical system is formed by a paraboloid primary mirror and a paraboloid secondary mirror, and a thermal target material and a cross target plate are arranged on the focal plane of the collimator optical system in a conjugate mode. The laser incident diaphragm is a specially-made diaphragm, so that the shape of a light spot can be modulated into a shape which is more beneficial to high-precisioncentroid detection. The control computer acquires an image of the target surface of the detection device imaged by the detected product, and automatically detects the optical axis deviation of each sensor of the detected product by using an optical axis deviation detection algorithm. The large-caliber collimator is convenient to use, high in detection precision, good in working stability, high inautomation degree and suitable for product adjustment, maintenance and external field guarantee.

The invention discloses a laser communication terminal transmitting and receiving coaxial real-time calibration method, and belongs to the field of laser communication. The problems that an existing device for detecting the coaxiality of the laser communication terminal is complex in detection system composition, time consuming and tedious in detection process and poor in adaptability to an external field working environment are solved. The calibration method is realized based on an upper computer, a laser communication terminal and a calibration guide mirror. The method is characterized by, through a laser communication terminal, receiving reflected light of signal light and beacon light emitted by the laser communication terminal; analyzing and calculating the light beam angle offset toobtain a transmitting and receiving optical axis deviation angle delta phi; obtaining correction angles delta Fx and delta Fy of a transmitting fine aiming swing mirror in the transmitting optical path according to the transmitting and receiving optical axis deviation angle delta phi, and correcting the current position of the transmitting fine aiming swing mirror in the transmitting optical pathaccording to the delta Fx and delta Fy, thereby realizing calibration of coaxiality of the transmitting optical path and the receiving optical path of the laser communication terminal. The method is mainly used for calibrating the transmitting and receiving coaxiality of the laser communication terminal.

The invention relates to an optical path detector for high-brightness LEDs and a detection method of optical axis deviation in high-brightness LEDs. The detector comprises an LED holder, a light intensity acquisition device, a FPGA (field programmable gate array) control chip set, a USB (universal serial bus) transmission circuit and an upper computer, wherein the LED holder is used for fitting a high-brightness LED, the light intensity acquisition device is disposed on the side of the LED holder and is capable of acquiring the position of light intensity of the high-brightness LED, the FPGA control chip set drives the light intensity acquisition device to acquire distribution image data of light intensity of the LED, and the FPGA control chip set uploads the acquired data to the upper computer through the USB transmission circuit in real time. The detection method of optical axis deviation in high-brightness LEDs includes the steps: firstly, acquiring distribution image data of direct light intensity of the high-brightness LED; and secondly, processing the light intensity data, and analyzing deviation of LED optical axis. The optical path detector for high-brightness LEDs and the detection method of optical axis deviation in high-brightness LEDs are applicable to selection of LED lights having special requirements for optical axis of high-brightness LED lights. The detector is simple to operate and reliable in performance, and screening results are displayed visually.

A facial authentication device (100) includes an image corrector (107) that estimates an orientation of a face based on a center position of the face and a position of imaging unit (101) to correct an image distortion including optical axis deviation with respect to visible light image data such that the orientation of the face coincides with an optical axis direction of imaging unit (101), and a feature amount calculator (105) that extracts a face portion from the image data captured by the imaging unit (101) and calculates a feature amount of the face to output to the image corrector (107), and calculates the feature amount of the face from the image data corrected by the image corrector (107) to output to a face collator (109).

The invention discloses a device and method for correcting the optical axis deviation of a video camera based on binocular stereoscopic vision. The device includes a base plate and a detection block.One end of the base plate is provided with a bracket, and a binocular image acquisition device is mounted on the bracket. A main mechanism is arranged on the surface of the other end of the base plate. A plurality of mounting holes in an array are arranged on the main mechanism. Bolts pass through the mounting holes connect the main mechanism with the base plate. The length of the main mechanism extending out of the base plate can be adjusted by changing the positions of the mounting holes. The tail of the main mechanism has a tail groove in which the detection block is installed by screws. Through the combination of the device and a CAD three-dimensional model of the device, it is not necessary to know the detailed design parameters of a lens, and the actual coordinate and the ideal coordinate of a few groups of detection corners are obtained through a detection device, so as to effectively and accurately realize the optical axis correction of a binocular stereoscopic vision video camera. The device and the method are easy to operate.

An optical film made via melt extrusion of a noncrystalline thermoplastic resin and having a thickness of below 100 mum, a residual phase difference of up to 10 nm and an optical axis deviation within +-10 DEG , and a method for manufacture of an optical film wherein, when a nocrystalline thermoplastic resin having a glass transition temperature Tg is extruded from an extrusion die into a film and bringing the film into close contact with a chill roll, a temperature of the film before the film from the die exit is brought into close contact with the chill roll is maintained not to fall below Tg+50 DEG C.

The invention relates to a portable long-focal-length large-aperture device for measuring the deviation of an optical axis of a product, and a measurement method. A rhombic prism assembly is used to expand the aperture of a card-type collimator, and an optical axis deviation measurement system is used for automatically measuring the deviation of the optical axis of a large-aperture multi-sensor product. The method comprises the following steps that a combined target on the focal plane of the card-type collimator can receive the laser or infrared light emitted by the product and form a visiblespot on the focal plane of the card-type collimator; the rhombic prism assembly can effectively export a beam outside the effective aperture of the card-type collimator into a device; the optical axisdeviation measurement system is aligned with the aperture of the card-type collimator but is separated from the card-type collimator; a CCD is used to collect and record the product spot position ofany convergence on the focal plane of the card-type collimator; the test software of the optical axis deviation measurement system can quickly calculate the deviation between the two pixel centers ofthe product spot at different positions of the CCD, and convert and display the angular deviation of the two optical axes.