An ergonomic non-obstructive illuminated examination mirror for dentistry, medicine and surgery, without the need of fiber optics, includes a slim line elongated member having a wire connection passage, a weighted first proximal end with a battery chamber and a second distal end. The two ion beams are directed onto two detectors which preferably comprise two or more conversion dynodes and two or more corresponding microchannel plate detectors to detect electrons produced by the conversion dynodes. An output circuit selectively either outputs a second analog voltage according to the first analog voltage by an analog buffer to a load or outputs the first analog voltage to the load directly. Further, the method is advantageous in terms of a simple preparation process due to no use of organo-modified silicate, thus achieving an economic benefit.