This invention provides the two types of Discretely Controlled Micromirror, which can overcome disadvantages of the conventional electrostatic micromirrors. The following features of the tree and its fruit are characterized with the tree budded on \u2018Nemaguard\u2019 Rootstock, grown on Handford sandy loam soil with Storie Index rating 95, in USDA Hardiness Zone 9, near Modesto, Calif. According to still another preferable embodiment of the present invention, an optical material obtained by curing the above-described composition for a resin and having a high refractive index can be provided.