105 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.

Focusing systems for which variation of magnification with focus is either inherently compensated, or is calibrated and corrected. The required conditions for inherent compensation are determined, and the desired state is called constant relative magnification. It is shown that telecentricity does not guarantee constant relative magnification. Both telecentric and non-telecentric accessory cameras for endoscopes are disclosed that have constant relative magnification, as are additional optical systems for general metrological purposes. Methods for calibrating change in relative magnification and deviation of the optical axis with focal shift are disclosed, as are methods for incorporating these changes into perspective dimensional measurements. Embodiments are disclosed in which only a single quantity need be measured to perform the correction, and these embodiments require only a low-resolution position transducer to provide accurate measurements. Apparatus is disclosed that enables an accessory camera to be aligned to an endoscope using only externally accessible adjustments. This apparatus also makes it possible to de-mount the camera from one endoscope and re-mount it to another without requiring any recalibration.

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 relates to a multi-optical-axis consistency detecting device and method based on target switching. The detecting device adopts a target switching method to realize a deviation test between optical axes of infrared, laser emission and laser reception. The detecting device is provided with a reference optical axis, by calculating the deviation of each optical axis with respect to the reference optical axis, the consistency test between the multiple optical axes is completed, and the optical axis deviation between the infrared and laser emission optical axes of a photoelectric product can be quickly detected. The self-test and optical axis consistency test process of the detecting device is simple to operate, and the difficulty in using and maintaining the device is reduced.

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 provides a measuring method of an angle of view and an optical axis center of a camera movement. A test pattern for measuring the angle of view and the optical axis center of the cameramovement is designed, and the test pattern includes a target image of a fixed center. By means of the resolution of the test pattern, the corresponding pixel value of the target pattern, and the object distance between the camera and the test pattern, the angle of view of the current magnification is calculated by a trigonometric function, and the coordinate set of the fixed center of the target pattern is calculated at different magnifications based on the angle of view; the deviation trend of the optical axis center is calculated by comparing the total deviation value of the coordinate set with respect to the center of the test pattern, and the deviation of the optical axis center of the camera is further calculated according to the trend. The invention can simultaneously measure the angle of view and the deviation of the optical axis, does not need to repeat measurement, and saves time; the pattern alignment is automatically completed; the pattern alignment precision does not need to be too high, as long as the test pattern exists in each picture under each magnification, the data is corrected by the calculation method of the optical axis deviation correction.

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 relates to a projection device, a projection method, a projection module, an electronic device, and a program. The present invention relates to a projection device and a projection method that make it possible to correct optical axis deviation, a projection module, an electronic device, and a program. Test emission of a laser beam serving as a light source is performed in a projection device and the position of the optical axis thereof is determined by a light amount ratio detected by a photodetector (PD) that is a two-dimensional flat surface perpendicular to the optical axis and that is divided into a plurality of regions. Optical axis deviation is determined on the basis of information relating to the RGB optical axis, a correction coefficient is calculated for correctingpixel position deviation on a projection image that is projected on a screen, the pixel position at which projection should occur is corrected by the correction coefficient, and deviation of the RGB optical axis is thereby corrected. The present invention can be applied to a projection device.

The invention is a lens module for a portable electronic device, comprising a lens cone formed with a hollow channel inside; a lens group held in the hollow channel, comprising plural lenses, the edge of each lens has plural mounting parts, each mounting part comprises a bump and a groove on two sides of the lens, and each lens is fastened with the adjacent lenses through the bump and groove so that all lenses are assembled together. The optical axis of the lens module is limited depending on the lens group itself instead of the lens cone, therefore reducing the optical axis deviation and improving the imaging quality.

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 device and method for quickly measuring the performance of a laser ranging system. According to the device and method of the invention, a reticle with scribed lines and a laser optical fiber end surface are equidistantly fixed to two sides of a color separation film by means of the light splitting function of the color separation film; an optical fiber transmits laser generated by a delayed echo generator component to a device under test through a collimator; a beacon light source outputted from the optical fiber is arranged at the focal plane of the collimator so asto be adopted as indication light; and therefore, the rapid measurement of the performance of the laser ranging system can be realized. The device and method can be used for detecting a laser divergence angle and light spot energy in the laser ranging system and the ranging capability of the laser ranging system and can also be used for calibrating the optical axis deviation of the laser receivingand transmitting of the device under test. The device and method of the invention are applicable to the real-time calibration of the performance of various laser ranging systems, and are also applicable to the transmitting and receiving coaxial detection of an active and passive combined photoelectric system and other fields. According to the device and method of the invention, a focal plane module is fixed, a calibration method is simple, and prices are low.

In a disclosed spatial optical communication apparatus, the optical-axis deviation correction is possible at the same time for both high-speed angular variation with a small amplitude and low-speed angular variation with a large amplitude, and the apparatus has a function of correcting the optical-axis deviation whose application range is wide and whose correction ability is high. To achieve such function, the spatial optical communication apparatus for performing communication between spaced locations with a light beam is provided with both a light deflecting unit set inside an optical system with a narrow variable angle range and a fast response speed, and an optical system driving unit set outside the optical system with a slow response speed and a wide variable angle range.

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.

A space optical transmission apparatus is provided which achieves high-speed simultaneous space optical transmission with respect to a plurality of terminals. In the space optical transmission apparatus, a light receiving section receives an optical signal from a terminal. A control section estimates how much optical axes of a master station and the terminal are deviated from each other, based on the received optical signal. The control section selects one of a plurality of light sources which requires a smallest amount of shift of an optical axis thereof, based on the estimated optical axis deviation amount, so as to communicate with the 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.

A charged particle beam writing apparatus includes a stage on which a target object is placed; an emitting unit configured to emit a charged particle beam to the stage side; a blocking unit arranged between the emitting unit and the stage and configured to block the charged particle beam emitted; a deflector having electrodes through which a current flows by applying a voltage and configured to deflect the charged particle beam passing between the electrodes onto the blocking unit by applying a predetermined voltage across the electrodes; an optical axis adjusting unit configured to correct optical axis deviation of the charged particle beam generated by continuously repeating irradiation (beam-ON) of the charged particle beam on a target object and blocking (beam-OFF) of the beam by applying a two-step voltage to the deflector; and a control unit configured to control the optical axis adjusting unit such that an amount of the optical axis deviation is corrected.

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.