A display protector includes a transparent base layer having a first surface and a second surface opposite to the first surface; a first stress relief adhesive layer on the first surface of the transparent base layer; a second stress relief adhesive layer on the second surface of the transparent base layer; and an ultra-thin glass (UTG) layer on the first stress relief adhesive layer, wherein a storage modulus of the first stress relief adhesive layer is about 0.03 MPa to about 0.2 MPa at −10° C.

A light source device includes: a laser diode; a substrate directly or indirectly supporting the laser diode; and a cap secured to the substrate and covering the laser diode. The cap includes a first glass portion configured to transmit laser light that is emitted from the laser diode, and a second glass portion. At least one of the first glass portion and the second glass portion includes an alkaline glass region. The first glass portion and the second glass portion are bonded together via an electrically conductive layer that is in contact with the alkaline glass region.

A UV transmitting glass of the present invention is characterized by including as a glass composition, in terms of mass %, 60% to 78% of SiO.sub.2, 1% to 25% of Al.sub.2O.sub.3, 10.8% to 30% of B.sub.2O.sub.3, 0% to less than 1.9% of Li.sub.2O, 0% to 8% of Na.sub.2O, 1.6% to 8% of K.sub.2O, 1.6% to 10% of Li.sub.2O+Na.sub.2O+K.sub.2O, 0% to less than 1.9% of BaO, 0% to less than 1.9% of Li.sub.2O+BaO, and 0% to 1% of Cl, and having an external transmittance at a thickness of 0.5 mm and a wavelength of 200 nm of 40% or more.

A dental bulk block for a CAD/CAM machining process. The dental bulk block is a glass-ceramic block having a crystalline phase embedded in an amorphous glass matrix. The crystalline phase includes lithium disilicate as a main crystalline phase, no sub-crystalline phase exists, and the crystalline phase has a mean grain size of 0.01 to 1.0 μm and a crystallinity degree of 25 to 45%. The dental bulk block can improve machinability during cutting such as CAD/CAM machining in the state of a high-strength workpiece with high flexural strength, thereby reducing a tool resistance and a wear rate, increasing a tool life span, and reducing edge chipping during a machining process. In addition, a dental restoration with desired translucency variations can be manufactured through a simple process of machining a block and altering post-heat treatment conditions, and thus can be realized with various shades.

Devised is a UV transmitting glass having a high transmittance in a deep UV region, and also having high weather resistance. The UV transmitting glass of the present invention is characterized by including as a glass composition, in terms of mass %, 55% to 80% of SiO.sub.2, 1% to 25% of Al.sub.2O.sub.3, 10.8% to 30% of B.sub.2O.sub.3, 0% to 10% of Na.sub.2O, 0% to less than 1.6% of K.sub.2O, 0.1% to 10% of Li.sub.2O+Na.sub.2O+K.sub.2O, 0% to 5% of BaO, and 0% to 1% of Cl, and having an external transmittance at a thickness of 0.5 mm and a wavelength of 200 nm of 38% or more.

The invention relates to a dental opaquer composition which can be used to increase the opacity of zirconium oxide ceramics. In addition, the invention relates to a process for producing a dental restoration, in which the opacity of the zirconium oxide ceramic is increased by using the opaquer composition.

A glass includes SiO.sub.2 in an amount of at least 60.0 wt.-% and an amount of WO.sub.3 from 0.1 ppm to 60.0 ppm. Tungsten is present in such oxidation states that a transmittance of the glass at a wavelength of 260 nm is at least 75.0%.

ZrO.sub.2-toughened glass ceramics having high molar fractions of tetragonal ZrO.sub.2 and fracture toughness value of greater than 1.8 MPa.Math.m.sup.1/2. The glass ceramic may also include also contain other secondary phases, including lithium silicates, that may be beneficial for toughening or for strengthening through an ion exchange process. Additional second phases may also decrease the coefficient of thermal expansion of the glass ceramic. A method of making such glass ceramics is also provided.

The present invention relates to a glass substrate, having a specific matrix composition and including an etched surface having the number of protrusions of 400 or more and 2,000 or less on at least one of main surfaces, in which the number of protrusions is obtained by measuring a region of 285.12 μm×213.77 μm with a laser microscope to obtain XYZ data of a surface shape, and conducting a shape analysis of the XYZ data by using an image processing software SPIP manufactured by Image Metrology.

A strengthened glass having a stress profile that differs from error-function and parabolic profiles. Stress relaxation and thermal annealing/diffusion effects, which occur at longer ion exchange and/or anneal times increase the depth of compression of the surface layer. A method of achieving these effects is also provided.