12 results about "Collimator" patented technology

In a laser module (310), single-emitter laser diode chips (110) are positioned at different heights on opposite sides of the module's combined output beam (114). Each laser diode chip (110), and its corresponding fast and slow axis collimators (130, 134), and turning mirror (140) are positioned on a corresponding heat-dissipating surface region (340). High thermal stability and output power are obtained in some embodiments even if the modules are combined to obtain higher-level modules (310-2). Other features and embodiments are also provided.

An X-ray apparatus for image acquisition and a related method. The apparatus comprises a field-of-view corrector (CS) configured to receive a scout image (SI) acquired by the imager with a tentative collimator setting in a pre-shot imaging phase where said imager operates with a low dosage radiation cone causing the detector to register the scout image. The low dosage cone has, in the detector's image plane, a first cross section smaller than the total area of the detector surface. The field-of-view corrector (CS) uses said scout image to establish field-of-view correction information for a subsequent imaging phase where the imager is to operate with a high dosage radiation cone, the high dosage higher than the low dosage.

The present invention provides a three-dimensional calibrating measurement device for neutron diffraction stress analysis. The three-dimensional calibrating measurement device can move with multi-degree of freedom by utilizing a three-dimensional scanner matched with a sample table firstly; scanning images of samples on the sample table are collected into a computer for building a three-dimensional model of each sample; sub-net treatment is performed on each three-dimensional model, and each net grid is allocated with a unique identification; any target net grid is selected from the three-dimensional model in a manual or automatic mode, the movement of the sample table is controlled by a movement control program set in the computer, so as to enable an entrance slit to be aligned to the corresponding target net grid, at the same time, each diffraction slit, a corresponding collimator and a corresponding neutron detector move to corresponding positions, a neutron source emits a neutron beam, and neutron diffraction stress measurement is started. The three-dimensional calibrating measurement device can be used for achieving precise three-dimensional calibrating on the samples, is low in space requirement, and free of additional installation of datum mark light sources, avoids introduction of additional errors, and can reach the position accuracy up to 100 mu m for detected samples.

The invention discloses a collimator positioning assembly, and the assembly comprises a driver; a carrier driven by the driver to operate, wherein the carrier is provided with at least two collimating positions through limiting; a position initialization assembly which is used for setting the zero position of the carrier; a coder which detects the first actual position information of the movement of the carrier relative to the zero position; a position confirmation assembly which is used for feeding back second actual position information when the carrier is located at any collimating position; a storage unit; and a controller which is used for controlling the driver to drive the carrier to move according to the first actual position information detected by the coder and first preset position information which is corresponding to to-be-located collimating position and stored by the stored unit till the first actual position information detected by the coder is consistent with the first preset position information which is corresponding to to-be-located collimating position and stored by the stored unit, and is also used for feeding back verification information according to the comparison of the second actual position information fed back by the position confirmation assembly with the second preset position information which is corresponding to to-be-located collimating position and stored by the stored unit.

The invention discloses an optical temperature sensor and a temperature measurement method. The temperature sensor comprises a housing, and the interior of the housing is provided with a first optical fiber collimator and a second optical fiber collimator. At least one wave crystal plate is disposed between the first optical fiber collimator and the second optical fiber collimator, and two sides of the wave crystal plate are respectively provided with polaroids in a parallel manner. Light passing through the first optical fiber collimator enters the polaroids vertically. The temperature measurement method comprises the steps: carrying out the accurate temperature calibration of the sensor, building the corresponding relation between the temperature and a central wavelength, and determining to-be-measured temperature through detecting the central wavelength of the outputted light. The sensor and method obtain the specific wave crest because the sensor and method can carry out the processing of the incident light through the polaroids and the wave crystal plate, obtain the environment temperature through detecting the central wavelength of the specific wave crest, and improve the temperature measurement stability of the sensor.

A chopper wheel assembly includes a collimator configured to narrow an x-ray beam, a chopper wheel has a planar surface configured to face in a direction of the collimator and a housing configured to receive the chopper wheel. The chopper wheel includes a central axis, a plurality of slits in the planar surface, a first projection extending from the planar surface in a direction of the collimator and a second projection extending from the planar surface in the direction of the collimator. The slits extend in radially-outward direction relative to the central axis. The first projection is located radially outward of the plurality of slits and the second projection is located radially inward of the plurality of slits. Each projection is provided for 360 degrees about the central axis. The housing includes an interior wall including a first groove configured to receive the first projection and a second groove configured to receive the second projection with the chopper wheel received within the housing.

The invention discloses an optical collimator, a forming method thereof and a fingerprint sensor module. The optical collimator comprises a plurality of stacked flexible non-light-transmitting layers,each flexible non-light-transmitting layer is internally provided with a sub-layer optical channel penetrating through the flexible non-light-transmitting layer, and for the sub-layer optical channelin the adjacent flexible non-light-transmitting layer, the sub-layer optical channel of the upper layer is located above the sub-layer optical channel of the lower layer; and a channel flexible light-transmitting layer is positioned in each sub-layer optical channel. The performance of the optical collimator is improved.

The variable-attenuation fiber calibrator with miniature machine includes one fixing tube holding lens and tail fiber, and miniature mechanical attenuation controller set in the space between the lens and the tail fiber. Embedding attenuation controller to the fiber calibrator makes the fiber calibrator possess the function of changing attenuation. The variable-attenuation fiber calibrator with miniature machine is small, favorable to integration and replacement, reliable and low in cost, and has all the advantages similar to common fiber calibrator.

The invention belongs to the field of optical signal transmission, and particularly relates to a collimator fixing end cover machining method and an application thereof. The collimator fixing end cover machining method comprises the following steps that (1) a fixing end cover blank is produced, and the fixing end cover blank comprises a plurality of solid collimator fixing end cover preparation pieces which are continuously and repeatedly arranged; (2) a plurality of mounting holes are axially formed in the fixed end cover blank in a penetrating mode; (3) a fourth positioning structure is processed and arranged on each collimator fixing end cover preparation piece so that the fourth positioning structure on each collimator fixing end cover preparation piece is in mirror symmetry after being rotated by 180 degrees; and (4) cutting is performed along the outline of the collimator fixing end cover preparation piece to obtain a finished collimator fixing end cover. When the collimator fixing end cover is applied to the optical fiber rotary connector, the assembly steps and difficulty can be effectively reduced. Through cooperation of the Dove prism, the prism sleeve, the shaft end cover and the collimator fixing end cover, the adjustment-free light rotary connector is finally realized.