An image generation system and contactless communication media, a method for selling commodities, and a complex store provide that the purchase of commodities can be considered based on actual commodities offered at shops and images including the use state of the commodities. In one aspect, the reflector assembly defines a plurality of air slots. The method is beneficial in that it can be used with an antenna in close proximity to the article to be measured, for example for use in on site measurement of specific regions of a turbine blade. The received signal may be read directly in some non-standard systems, or it may be determined from the known transmit signal and channel attenuation, which is sometimes the case in standard-compliant links, but often with a relatively large error. In another embodiment, the remote control can be used in a hand-held configuration. The vertical pitch of the beam through apertures increases as it goes from the central portion to the end portion of the shorter axis of the shadow mask.