OPHIR OPTRONICS LTD.
|OPHIR OPTRONICS LTD. Patent applications|
|Patent application number||Title||Published|
|20120134386||MULTIFUNCTION LASER POWER METER - A laser power meter incorporating an absorber disc with a peripheral thermopile ring, either continuous or segmented, and an additional temperature detection element in the central portion, that enables measurement of beam size. This detection element can be a thermopile element, generally a ring of smaller diameter than the peripheral thermopile used, and located closer to the center of the absorber disc. With this arrangement the beam size can be measured, in addition to measurements of the power and the position of the beam. Alternatively, this centralized detection element can be a single thermocouple junction located at the center of the disc, which acts as the hot junction of a thermocouple pair. The second or cold junction is effectively located on the disc close to the peripheral thermopile. Alternatively, two temperature measuring elements can be used, one at the disc center and one at the periphery.||05-31-2012|
|20120068420||CENTERING METHOD FOR OPTICAL ELEMENTS - A method for centering a circular optical element using a non-self-centering chuck adapted to grip the element at two grip strengths. The element is rotated in the chuck while measuring the lateral position of the element's outer rim with a probe. The positions of maximum and minimum run-out of the element as a function of its angular position are determined. Chuck rotation is stopped at an angular position with the maximum rim run-out positioned at a predetermined point. The grip of the chuck is reduced such that the element is still held in the chuck but can be moved in a lateral direction without damaging its surface. The element is moved in a direction connecting the predetermined point of maximum run-out and the axis of rotation of the chuck, in order to reduce the run-out of the element. The procedure is repeated until the desired centering is achieved.||03-22-2012|