Abstract: Disclosed is a composite collector and concentrator structure comprising a laminate having a self-supporting layer of solid light transmitting material of extended area in one plane in optical contact with a relatively thin layer of a silicone resin derived from a trifunctional silane containing at least one species of luminescent material which absorbs electromagnetic radiation and emits electromagnetic radiation of a longer wave length. Use with photovoltaic solar cells is also disclosed.

Abstract: Disclosed are phosphorus glasses containing beryllium and fluorine and Nd.sup.3+ as the active lasing species.

Abstract: Disclosed are phosphate glasses containing BaO, K.sub.2 O, Al.sub.2 O.sub.3 and Nd.sub.2 O.sub.3 and containing only very low amounts of water and a method of making such glasses.

Abstract: Glass compositions of the SiO.sub.2 -ZrO.sub.2 -alkali metal oxide-alkaline earth oxide system containing 70-82 mole percent SiO.sub.2 and 2-8 mole percent ZrO.sub.2 and alkali metal oxides and alkaline earth oxides, and optionally Al.sub.2 O.sub.3, in specified amounts, such glasses being resistant to water, acids and alkalies, having a low to medium thermal coefficient of expansion and a low liquidus temperature.

Abstract: There is disclosed a Faraday rotator device suitable for radiation phase shifters, isolators and shutters, that operate in the visible and infrared regions of the electromagnetic spectrum. The device includes (1) means for supplying polarized, electromagnetic radiation, (2) a lithia-silica-terbia glass article capable of effecting Faraday rotation when subjected to a magnetic field, and (3) means for inducing a magnetic field within the glass article, the glass generally comprising about 61-80 mole percent SiO.sub.2, 15-27.5 mole percent Li.sub.2 O, 3-9 mole percent Tb.sub.2 O.sub.3, and optionally, up to about 3 mole percent of R.sub.2 O.sub.3, such as Al.sub.2 O.sub.3 or B.sub.2 O.sub.3 --and optionally, minor amounts of Na.sub.2 O, K.sub.2 O or CaO, providing the sum of Li.sub.2 O + Na.sub.2 O + K.sub.2 O + CaO is not substantially greater than about 32.5 mole percent.