Abstract: A light-emitting element and an electronic apparatus capable of reducing the element area and realizing a stable electrical connection. A light-emitting element according to the present technology includes a first semiconductor layer, a light-emitting layer, and a second semiconductor layer laminated in this order, and a light-emitting surface, a non-light-emitting surface, and a side surface connecting the light-emitting surface and the non-light-emitting surface. The side surface is inclined. A first electrode is in a concave portion in the light-emitting surface at a periphery of the first semiconductor layer. A second electrode is on a non-light-emitting surface side of the laminate. A third electrode is on the non-light-emitting surface side of the laminate and is insulated from the second electrode. The side wiring electrically connects the first electrode and the third electrode via the side surface.

Abstract: An optical glass which is a P.sub.2 O.sub.5 system glass including ingredients selected from two groups of R.sub.2 O.sub.3 ingredients of specific contents have excellent resistivity to devitrification, homogeneity, light transmissivity and chemical durability.

Abstract: An Ophthalmic and optical glass which is a B.sub.2 O.sub.3 - SiO.sub.2 - Li.sub.2 O - CaO - La.sub.2 O.sub.3 - TiO.sub.2 - ZrO.sub.2 -Nb.sub.2 O.sub.5 system in which relatively large amounts of B.sub.2 O.sub.3 and La.sub.2 O.sub.3 ingredients coexist has improved resistivity to devitrification while maintaining desirable optical constants, i.e., a refractive index (.eta.d) in the range of 1.75 to 1.84, Abbe number (.nu.d) in the range of 33 to 40 and specific gravity of 4.0 or less. Besides, the range of content of the Li.sub.2 O ingredient which is effective for the chemical strengthening treatment can be enlarged by this system of glass.

Abstract: A fluoride glass basically containing ingredients of a P-Si-Al-alkaline-earth metals-alkali metals-F system within specific content ranges has extremely high anomalous partial dispersion and low dispersion properties and is stable without tendency to devitrification.

Abstract: An optical glass consisting essentially of a B.sub.2 O.sub.3 -SiO.sub.2 -La.sub.2 O.sub.3 -Gd.sub.2 O.sub.3 -Y.sub.2 O.sub.3 system and additionally containing ZrO.sub.2 has high refractive and low dispersive characteristics and is free of a poisonous thorium oxide ingredient.