The lateral V-shaped groove (2) and the longitudinal V-shaped groove (3), which cross each other, are formed on a surface of the substrate (1). When the optical element (100) is contacted with and supported by four ridges composed of sides (21, 22) of one V-shaped groove and sides (31, 32) of the other V-shaped groove, the optical element is positioned at the three-dimensional support position which is geometrically determined by the four points at which the four ridges and the surface of the optical element come into contact with each other.

_ lateral de forma de V surco (2) y longitudinal de forma de V surco (3), que cruz uno a, ser formar en uno superficie substrato (1). _ cuando óptico elemento (100) ser entrar en contacto con con y apoyar por cuatro canto componer lado (21, 22) uno de forma de V surco y lado (31, 32) otro de forma de V surco, óptico elemento ser positioned en tridimensional apoyar posición que ser geométrico determinar por cuatro punto en que cuatro canto y superficie óptico elemento venir en entrar en contacto con con uno a. _

 
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