Abstract: The present disclosure relates to a total station and to method of calibrating a total station (500). The total station comprises a centre unit (510) mounted on an alidade (520) for rotation about a first axis (130), wherein the alidade is mounted on a base (540) of the total station for rotation about a second axis (150) orthogonal to the first axis such that a sighting axis (170) of the total station is rotatable about a rotation point. The centre unit includes a plurality of measurement channels, wherein a measurement channel is associated with a measuring device (512, 514, 518) having an optical axis and wherein at least one measuring device is a camera (512) configured to capture images. The method comprises determining a collimation error relative to the sighting axis for any one of the plurality of measurement channels, thereby providing a calibrated reference measurement channel.

Abstract: A device is provided that includes a battery, a positive node and a negative node and logic configured to send a first signal through the positive node into a charging surface; send a second signal through the negative node into the charging surface; receive current from the charging surface in response to the first and second signals; and charging the battery with the received current from the charging surface.

Abstract: A mobile device may capture video of a media signal, parse frames of the captured video, and identify a tag within one or more of the frames of the captured video, where the tag includes a machine-readable representation of information. The mobile device may also analyze the tag to determine the information included in the tag, and present particular information based on the information included in the tag.

Abstract: A device is provided that includes a battery, a positive node and a negative node and logic configured to send a first signal through the positive node into a charging surface; send a second signal through the negative node into the charging surface; receive current from the charging surface in response to the first and second signals; and charging the battery with the received current from the charging surface.

Abstract: The present invention relates to an optical network with a number of nodes. Information is transmitted and, respectively, received in the nodes. The information is transmitted over a number of frequencies. Receiving and, respectively, transmitting of frequencies in the nodes is variable. The information is only converted to electrical signals in those nodes where the information is retrieved. Optical signals are amplified and distributed in the network via optical splitters and amplifiers. The capacity in the network can be redistributed depending on the capacity requirement in different parts of the network.