A location-based caching system provides the ability for a mobile communication device to dynamically provide content related to a user’s location. After a layer of image sensitive photoresist is patterned and developed with openings having the minimum printable dimension, the layer of photoresist is silylated causing the layer of photoresist to swell, which causes the opening dimension to decrease. The first layer is composed of a fibrous material and a binder, and the second layer is composed of a woven material and a binder. the contacts have contacting portions protruding into the cavity for contacting with the electrical plug and soldering tail portions extending outwardly beyond the bottom surface. To scan objects located on higher levels such as desks, the detector arm has an angular movement greater than ninety degrees with respect to an axis that has a vertical component. In a preferred embodiment, the adjustable band-pass filtering device is an electrically tunable optical filter.