The invention relates to a method of generating a signal indicative of the presence of a target nucleic acid in a sample, where the method includes forming a cleavage structure by incubating a sample comprising a target nucleic acid with a probe having a secondary structure that changes upon binding of the probe to the target nucleic acid and further comprising a binding moiety. The antenna, which extends substantially along an axis, has a first end and a second end. A process for producing the encapsulating material for solar cell in which dialkyl peroxide and an organic peroxide selected from peroxycarbonate and peroxyketal at a ratio by weight of 1090 to 9010 of and in a liquid state impregnate the molded form of the ethylene copolymer is a preferable embodiment of the present invention. Various methods for fabricating these structures are provided, all of which are compatible with large-scale manufacturing. To locate the actual point in the image perceived by the cameras, a search is performed in an area in the neighborhood of coordinates calculated from the point in the projection image.