Patent ID: 8154652
Filing Date: 2012-04-10
Classification: G03B,H04N

Abstract:
1. A lens apparatus comprising: a lens body having a plurality of movable optical members; a plurality of command units that generate a plurality of command signals for the plurality of movable optical members; a signal converting unit that is connected with the plurality of command units by cables and wirelessly connected with the lens body; and a communication condition monitoring unit for monitoring a wireless communication condition and a communication process switch unit for switching a communication process according to the wireless communication condition, provided in at least one of the lens body and the signal converting unit, wherein the lens body includes: a drive control unit for detecting each position of the plurality of movable optical members, generating a plurality of position signals and driving each of the plurality of movable optical members based on the command signals and the position signals; a command signal converting unit for converting time-series command signals from the signal converting unit into a plurality of original command signals; a time-series position signal converting unit for converting the plurality of position signals of the plurality of movable optical members into time-series position signals; and a first wireless communication unit for wirelessly transmitting the time-series position signals to the signal converting unit, wherein the signal converting unit includes: a time-series command signal converting unit for converting the plurality of command signals input from the plurality of command units into time-series command signals; a position signal converting unit for converting the time-series position signals from the lens body into the plurality of original position signals and outputting them to the plurality of command units; and a second wireless communication unit for wirelessly transmitting the time-series command signals to the lens body, and wherein when a communication error rate, which is indicative of the communication condition and is an output of the communication condition monitoring unit, is greater than a predetermined value, the communication process switch unit causes communication to be performed only at times when a command state of the command units changes, and when the communication error rate is equal to or smaller than the predetermined value, the communication process switch unit causes communication to be performed at a regular transmitting/receiving period.