3 results about "Depth direction" patented technology

An optical coherence tomography (OCT) anterior eye part imaging apparatus includes a tomographic image obtaining unit obtaining a tomographic image of an anterior eye part of subject's eye in a depth direction by optical coherence tomography, an imaging unit imaging a frontal image of subject's eye, a display unit displaying the image of subject's eye, a corneal apex location detecting unit detecting a location of subject's eye, an alignment unit moving an apparatus body relative to the holder so that the location of corneal apex corresponds with a predetermined image obtaining location, a designating unit designating an area or a location where the tomographic image is obtained on subject's frontal image displayed on the display unit, and a scan line setting unit setting a scan line in the tomographic image obtaining unit on a straight line passing the corneal apex according to the designated area or location.

The invention relates to a restorative method for ceramic cores with crack defects. The restorative method includes the steps that (1) polishing is carried out at the positions of the crack defects of the ceramic cores in the crack depth direction, the polishing depth is larger than or equal to 1/2 of the crack depth, and notch type groove structures are formed at the positions of the crack defects; and a silica solution and powder conforming ceramic core molding are adopted for mixing restorative slurry; (2) notch type grooves are cleaned; (3) the notch type grooves are cleaned with the silica solution, wherein after the silica solution in the notch type grooves are slightly dried, the restorative slurry is padded into the notch type grooves, and the padding depth is 1/3 to 1/2 of the groove depth; (4) a miniature oxyhydrogen flame gun is used for heating restorative parts of the ceramic cores, the heating temperature of the restorative parts is higher than 900 DEG C and is in the red state, and the state is kept for 3 seconds to 10 seconds; and the heated restorative parts are cooled to the room temperature; (5) the step (3) and the step (4) are repeatedly executed for restoring the remaining notch type groove parts until all notch type grooves are completed padded; and (6) abrasive paper larger than or equal to 800# is used for polishing for restoring the padding surfaces until the design requirements are met.

The invention provides a method for carrying out planing machining for narrow grooves by virtue of a numerically-controlled boring and milling machine. The method comprises the following steps: 1. clamping a workpiece, enabling a machining surface to be parallel to a spindle of the numerically-controlled boring and milling machine, and enabling a length direction of the narrow grooves to be parallel to the spindle; 2. clamping and correcting a tool, enabling a machining direction of a boring tool to be the same as the length direction of the narrow grooves, and enabling a feeding direction to be the same as a thickness direction of the narrow grooves; 3. fixing the spindle; and 4. carrying out program machining, specifically, determining a numerical control shaft which is parallel to the length direction of the narrow grooves to be machined to be in main cutting motion, and determining a numerical control shaft which is parallel to the depth direction of the narrow grooves to be machined to be in feeding motion; starting a program to machine; and realizing the planing machining for the narrow grooves by virtue of the numerically-controlled boring and milling machine and through the above-mentioned steps. Machining for the narrow grooves is carried out by virtue of the numerically-controlled boring and milling machine, thus the machining efficiency is improved and the machining quality is guaranteed; the operation is simple and practicable, and the width dimensions of the grooves are easy to control; and the efficiency of machining the narrow grooves by virtue of the method provided by the invention is 2 to 5 times of the efficiency of machining narrow grooves by virtue of an end mill, and the economic benefits of machining the grooves with the width dimensions of 2-4mm are the most obvious.