A glass-ceramic includes glass and crystalline phases, where the crystalline phase includes non-stoichiometric suboxides of titanium, forming ‘bronze’-type solid state defect structures in which vacancies are occupied with dopant cations.

The invention provides an optical glass having excellent precision molding performance and having a refractive index of 1.46-1.53 and an Abbe number of 77-84. The optical glass comprises the following components based on cations in the molar percentage: P.sup.5+: 10-35%, Al.sup.3+: 10-35%, Ba.sup.2+: 1-20%, Sr.sup.2+: 10-35%, Ca.sup.2+: 1-20%, Gd.sup.3+: 0-10%, and Na.sup.+: 0-10%; the ratio of Sr.sup.2+/(Gd.sup.3++Na.sup.+) being 1-30; anions comprising F.sup.− and O.sup.2−, wherein the ratio F.sup.−/P.sup.5+ of F.sup.− content relative to the total molar percentage of anions to P.sup.5+ content relative to the total molar percentage of cations is 2.5 or more. The invention by rationally adjusting the proportions of the components, the molding performance of the optical glass is improved, and the problem that glass is broken and forms fogs during the molding process is solved, thereby the yield in manufacturing optical elements is improved.

Optically transparent glass ceramic materials comprising a glass phase containing and a crystalline tungsten bronze phase comprising nanoparticles and having the formula M.sub.xWO.sub.3, where M includes at least one H, Li, Na, K, Rb, Cs, Ca, Sr, Ba, Zn, Cu, Ag, Sn, Cd, In, Tl, Pb, Bi, Th, La, Pr, Nd, Sm, Eu, Gd, Dy, Ho, Er, Tm, Yb, Lu, and U, and where 0<x<1. Aluminosilicate and zinc-bismuth-borate glasses comprising at least one of Sm.sub.2O.sub.3, Pr.sub.2O.sub.3, and Er.sub.2O.sub.3 are also provided.

To provide a near infrared cutoff filter glass which is excellent in optical properties such that the transmittance of light in the visible range is high and the transmittance of near infrared light is low. A near infrared cutoff filter glass comprising P, F, O, Cu and Ce, wherein by cation %, from 0.1 to 15% of Cu.sup.2+ is contained, and the ratio of Cu.sup.2+ to Ce.sup.4+ (Cu.sup.2+/Ce.sup.4+) is from 3.5 to 15.

To provide a near infrared cutoff filter glass which is excellent in optical properties such that the transmittance of light in the visible range is high and the transmittance of near infrared light is low. A near infrared cutoff filter glass comprising P, F, O, Cu and Ce, wherein by cation %, from 0.1 to 15% of Cu.sup.2+ is contained, and the ratio of Cu.sup.2+ to Ce.sup.4+ (Cu.sup.2+/Ce.sup.4+) is from 3.5 to 15.

The present invention relates to an ultraviolet-shielding glass sheet including a glass composition based on soda-lime glass, the glass composition containing iron oxide and TiO.sub.2 as coloring components. The glass sheet has a thickness of 1 to 5 mm, and an ultraviolet transmittance (Tuv 380) as determined at the thickness according to ISO 9050:1990 is 1.5% or less.

In an FOP 1, a glass body 8 is configured by including antimicrobial glass portions 10 made of antimicrobial glass containing Ag.sub.2O. Here, the glass containing silver does not have chemical durability, so that it has properties to easily emit Ag ions due to moisture. Ag ions have an excellent antimicrobial effect. Therefore, by configuring the glass body 8 to include the antimicrobial glass portions 10 containing Ag.sub.2O, the glass body 8 can obtain a sterilization effect due to the action of Ag ions. Therefore, the FOP 1 can be provided with antimicrobial activities.

In an FOP 1, a glass body 8 is configured by including antimicrobial glass portions 10 made of antimicrobial glass containing Ag.sub.2O. Here, the glass containing silver does not have chemical durability, so that it has properties to easily emit Ag ions due to moisture. Ag ions have an excellent antimicrobial effect. Therefore, by configuring the glass body 8 to include the antimicrobial glass portions 10 containing Ag.sub.2O, the glass body 8 can obtain a sterilization effect due to the action of Ag ions. Therefore, the FOP 1 can be provided with antimicrobial activities.

An energy-saving glass includes a glass substrate, and a periodic metal layer deposited on the glass substrate and having a honeycomb array of round holes. A method of manufacturing the energy-saving glass includes: providing a template having multiple template spots arranged in a honeycomb array; forming on the template a transfer metal layer having multiple metal spots disposed respectively on the template spots; transferring the metal spots onto a photoresist layer on a glass substrate; etching the photoresist layer exposed from the metal spots to leave photoresist spots underlying the metal spots on the glass substrate; forming a periodic metal layer around the photoresist spots; and removing the photoresist spots.

A detection device includes (a) a LiDAR sensing device and (b) a housing enclosing the LiDAR sensing device, the housing including at least one cover lens. At least a portion of the cover lens is made of at least one glass sheet having an absorption coefficient lower than 5 m.sup.−1 in the wavelength range from 750 to 1650 nm. The cover lens helps to protect the LiDAR sensing device from external degradation.