150results about How to "Improve UV transmittance" patented technology

This invention provides a medical device container comprising thermoplastic materials wherein said container is transmissive over substantially all of the surface area of said container to greater than 30% of the radiation in the range of 240 to 280 nm which impinges upon said container, and wherein said container is impervious to microorganisms. The preferred medical device container houses a contact lens.

To provide a near infrared cut filter glass which can suppress the near infrared transmittance to be low while maintaining a high ultraviolet transmittance, at a low cost.

Ultraviolet transmitting near infrared cut filter glass comprising, as represented by mass %, from 50 to 85% of P₂O₅, from 1 to 20% of Al₂O₃, from 1 to 5% of B₂O₃, from 0 to 2% of Li₂O, from 0 to 15% of Na₂O, from 0 to 20% of K₂O, from 7 to 20% of Li₂O+Na₂O+K₂O, from 0 to 2% of MgO, from 0 to 1% of CaO, from 0 to 4% of SrO, from 1 to 22% of BaO, from 1 to 22% of MgO+CaO+SrO+BaO, from 0.1 to 2% of CuO, from 0 to 1% of Co₃O₄ and from 0 to 5% of Sb₂O₃.

The invention discloses an interval or continuous catalytic hydrogenating for ethandiol (weight density at 10-100%), which is characterized by the following: adopting aggregate nickel or palladium carbon as catalyst; transmitting C=C and C-O into saturated material not to adsorbed by ultraviolet in the ethandiol; reducing the content of aldehyde; improving ultraviolet transmission rate; controlling the reacting temperature between 45 deg. c and 95 deg. c; setting the reacting pressure between 0. 05 and 0. 5Mpa and air speed not less than 60h-1; obtaining the product with ultraviolet transmitting rate more than 90% at 220nm, more than 95% at 275nm, more than 99% at 350nm.

The invention provides a structure and a method for enhancing the adhesive strength of a panel sealant. The structure comprises an upper substrate, a lower substrate and a supporting area, wherein a sealant is coated on the circumference of the lower substrate; the supporting area is positioned in the range of the sealant; the supporting area comprises a plurality of supports with concavo-convex surfaces and a plurality of spacers; the supports are formed on the upper substrate; and the spacers are positioned between the supports and the lower substrate. The supporting strength of the upper and the lower substrates is increased by the supports and the spacers; the supports with a concavo-convex design can increase the adhesive area of the sealant and the upper substrate; and the adhesive strength can be increased after the upper and the lower substrates are combined into the panel.

The invention relates to an alpha-barium boron oxide (alpha-BBO) polarizing prism. During material selection, a crystalline material, namely LiF crystals with the highest vacuum ultraviolet-far infrared transmittance, the best ultraviolet-far infrared crystalline materials, namely alpha-BBO crystals, for making a polarizing prism, and LiF crystals with extremely low refractive index are particularly selected. During design, a cuboid hamburger structure connected by two alpha-BBO crystal prisms and a piece of LiF window optical cement is adopted, a light path is completely glue-free, the transmittance is high, the vertex angles of the two alpha-BBO crystal prisms are 57.8+/-0.2 degrees, an optical axis of the alpha-BBO polarizing prism is vertical to an o-light spilling plane, the o-light is totally spilt from the side face, the volume is small, the wavelength coverage range is between 0.19 and 3.5 mu m, the total incident angle of the o-light and e-light is more than 11 degrees in the whole wavelength range, the extinction ratio is less than 5*10<-6>, and the transmittance is high.

The invention relates to a method for improving glycol product quality, and mainly solves the technical problem of low ultraviolet light transmittance of glycol products in the prior art of. According to the method, under the conditions of the reaction temperature of 70 DEG to 130 DEG C, the reaction pressure of 0.05-1.0MPa, the glycol liquid hourly space velocity of 2-60H <-1> and the volume ratio of hydrogen to raw material of 1-50, an unqualified glycol raw material with glycol content greater than 99% and low ultraviolet light transmittance and hydrogen passes through a gas and liquid phase fixed bed reactor to contact a catalyst in a reactor to obtain a polyester grade glycol product flow, the catalyst uses alumina as a carrier, uses at least one substance selected from nickel or palladium as an active ingredient, and uses at least one substance selected from magnesium, calcium, barium, molybdenum and cerium; by sue of the technical scheme, the technical problem of low ultraviolet light transmittance of the glycol products in the prior art can be well solved, and the method can be used in industrial production to improve the glycol product quality.

A metal fluoride single crystal pulling apparatus that upward pulling initiation through termination, in the state of shallow melt capable of highly effective inhibition of scatterer formation, can perform stable growth of single crystal and can suppress any mixing of air bubbles and occurrence of crystal break during crystal growth, etc; and a process for producing a metal fluoride single crystal therewith. As a crucible for accommodating a melt of raw metal fluoride, use is made of a double structured crucible composed of an outer crucible and an inner crucible. In the upward pulling of single crystal, the accommodation depth of inner crucible relative to the outer crucible is increased in accordance with any decrease of melt accommodated in the inner crucible according to the growth of single crystal, so that the melt accommodated in the outer crucible is fed into the inner crucible to thereby maintain the amount of melt accommodated in the inner crucible within a given range. Further, at the position of an opening that upward opens any gap space between an external surface of outer crucible and an internal surface of inner crucible, or an interstice, situated below the opening, between a side wall internal surface of outer crucible and a side wall external surface of inner crucible, there is disposed a cutoff member that cuts off at least part of the position.

The invention provides a scintillating glass and a preparation method thereof and relates to a scintillating glass adopting SnO2 as the luminescence center and a preparation method thereof. The scintillating crystal has been widely researched, but has high preparation cost and large difficulty of preparation technology. In this case, the research of the scintillating glass obtains attention, because the preparation cost of glass is much lower than that of crystal and the preparation technique is simpler. Currently, the scintillating glass adopting doped Ce as the luminescence center is more researched. But as the quenching effect of the concentration of the Ce is large, the luminous intensity is limited, and simultaneously the Ce is sensitive to matrix and can cause red shift of absorption edges, thus having influence to ultraviolet-visible permeability. While the scintillating glass adopting SnO2 as the luminescence center can make up the above defects. The SnO2 belongs to a network intermediate, can be introduced with high concentration and has higher luminous intensity; simultaneously the ultraviolet-visible permeability of the glass is good; and the introduction of tin oxide can maintain, even further improve forming ability and other physical-chemical performances of the original glass.

The invention discloses an ultraviolet light-emitting diode chip with a transparent conducting layer, and a fabrication method of the ultraviolet light-emitting diode chip. The chip comprises a sapphire substrate, an aluminum nitride buffer layer, an n-type aluminum gallium nitrogen layer, an aluminum gallium nitrogen multiple quantum well active layer, a p-type aluminum gallium nitrogen electron barrier layer, a p-type gallium nitride layer, a transparent zinc oxide base conducting layer, a p-type metal electrode on the transparent zinc oxide base conducting layer, and an n-type metal electrode on the n-type aluminum gallium nitrogen layer. The fabrication method adopts a metallorganics chemical vapor deposition method and a pulsed laser deposition method. The ultraviolet light-emitting diode chip has the advantages of low resistivity and high ultraviolet light transmittance; and fabrication raw materials are rich, low in price and environment-friendly.

The invention discloses a medicinal neutral borosilicate glass tube and a preparing method thereof. Manganese dioxide ingredients, titanium oxide ingredients and ferric oxide ingredients are added into preparing raw materials of the glass tube. One hundred parts of the raw materials comprise, by mass, 65 parts to 75 parts of silicon dioxide, 5.0 parts to 7.0 parts of aluminum oxide, 8.2 parts to 11.6 parts of diboron trioxide, 0.5 part to 2.4 parts of calcium oxide, 0.3 part to 3.4 parts of potassium oxide, 4.5 parts to 7.6 parts of sodium oxide, 0.2 part to 1.0 part of lithium oxide, 0.5 part to 7.0 parts of manganese dioxide, 0.4 part to 5.0 parts of titanium oxide and 0.2 part to 2.5 parts of ferric oxide. By means of the medicinal neutral borosilicate glass tube and the preparing method, the performance indexes such as the visible light transmittance, the ultraviolet light transmittance and the chrominance of an existing neutral borosilicate glass tube are improved, and the requirement for visible-light and ultraviolet-light sensitive medicine packages is met.

The invention provides an application of polydimethylsiloxane in preparation of a fluorescent film. Compared with the prior art, in the invention, the polydimethylsiloxane is used as a solvent of fluorescent dye as well as a film forming substrate; with relatively good ultraviolet transmittance, the polydimethylsiloxane can form a single-layer antireflection film structure with fused quartz glass substrate, and the spectrum transmittance is increased; moreover, with stable chemical property, the polydimethylsiloxane is a liquid colloid before use and can be solidified by heating for one hour at 80 DEG C, thus, the polydimethylsiloxane is very safe and stable during the preparation and after the film formation; and meanwhile, the characteristics of the fluorescent film can be maintained for long time.

Imaging optical systems having good transmission and that are well corrected over the full 315 nm-1100 nm ultraviolet-visible-infrared (UV-VIS-IR) wavelength band are disclosed. A wide variety of apochromatic and superachromatic design examples are presented. The imaging optical systems have a broad range of applications in fields where large-bandwidth imaging is called for, including but not limited to forensics, crime scene documentation, art conservation, forgery detection, medicine, scientific research, remote sensing, and fine art photography.

The present invention provides an UV transmission filter that reliably shields visible light and infrared light and achieves high ultraviolet light transmittance. The UV transmission filter includes abase made of glass and an optical multilayer film on the main surface of the base. The glass contains component of P, Al, R (Wherein R represents one or more of Li, Na, and K), R '(wherein R' represents one or more of Mg, Ca, Sr, Ba, and Zn), and Cu. The optical multilayer film has optical characteristics of an average transmittance of 5% or less at a wavelength of 420 nm to 680 nm when light isperpendicularly incident thereon.

The invention discloses a pot cover. The pot cover comprises a pot cover body, a sterilizing module, a control device and a shielding module, wherein the sterilizing module comprises an ultraviolet lamp; the shielding module comprises a shielding piece which is movably arranged on the pot cover body; and a light channel between the sterilizing module and the pot body can be closed or opened by the shielding piece. The ultraviolet transmittance is high, and the sterilizing effect is good. The invention further discloses a pot, a heat insulating module which is electrically connected with the control device is added, the control device is arranged on the pot body and/or the pot cover body, and is connected with the heat insulating module or a temperature sensor; and the ultraviolet transmittance is high, and the sterilizing effect is good. The invention further discloses a fresh-keeping method for food in the pot. The fresh-keeping method for the food in the pot comprises the following steps: closing the shielding piece in a food cooking process, and closing a light channel between the sterilizing module and the pot body; and after cooking of the food is finished and when the temperature reduced to a preset sterilizing temperature, opening the shielding piece, and turning on an ultraviolet lamp. Operation is simple and convenient, the sterilizing effect is good, and the fresh-keeping effect is good.

The invention discloses a pot cover. The pot cover comprises a pot cover body, a sterilization module and a control device, wherein the sterilization module comprises an ultraviolet light-transmitting piece, and an ultraviolet lamp arranged in an accommodating space between the pot body and the ultraviolet light-transmitting piece, the ultraviolet lamp is electrically connected with the control device, and the pot cover body is provided with a cleaning module used for cleaning the light-emitting side of the ultraviolet light-transmitting piece; the ultraviolet transmissivity is high, and the sterilizing effect is good. The invention further discloses a pot, wherein the pot comprises a pot body and the pot cover which covers the pot body; the ultraviolet transmissivity is high, and the sterilizing effect is good. The invention also discloses another pot, wherein a thermal insulation module electrically connected with the control device is additionally arranged; the control device is arranged on the pot body and/or the pot cover body, and is connected with the thermal insulation module or a temperature sensor; the ultraviolet transmissivity is high, and the sterilizing effect is good. The invention further discloses a method for preserving freshness of food in the pots; according to the method, after boiling of the food, when the temperature inside the pot is reduced to the preset sterilization temperature, the ultraviolet lamp is started, and when the temperature inside the pot is reduced to the preset sterilization temperature, the cleaning module is started; the operation is simple and convenient, the disinfection and sterilization effects are good, and the freshness preservation effect is good.

Disclosed is a composite film containing an acrylic polymer and a urethane polymer. The acrylic polymer contains an acrylic component including an acrylic acid monomer and a monofunctional (meth)acrylic monomer whose homopolymer has a glass transition temperature (Tg) of not less than 0° C. The acrylic acid monomer content in the acrylic component is not less than 1% by weight but not more than 30% by weight. The urethane polymer contains a urethane component obtained by reacting a diol and a diisocyanate. The diol and diisocyanate are used at an equivalent ratio NCO/OH of 1.1-2.0. The composite film has a content soluble in N,N-dimethylformamide (DMF).

Provided is a sheet-shaped mold possessing a high strength and having a low breakage rate in demolding even in a case where the mold is thin and has a large-area. The sheet-shaped mold is prepared by combining a cured silicone rubber containing a polyorganosiloxane and a fiber for reinforcing the cured silicone rubber. The fiber may comprise a cellulose nanofiber. The sheet-shaped mold may have an uneven pattern on at least one surface (or side) thereof. The fiber may be surface-treated with a hydrophobizing agent. The fiber may forma nonwoven fabric, and the nonwoven fabric may be impregnated with the cured silicone rubber. The cured silicone rubber may comprise a two-component curable silicone rubber having a polydimethylsiloxane unit. The sheet-shaped mold may be a mold for nanoimprint lithography using a photo-curable resin.

The invention provides ultraviolet-transmitting optical glass which comprises the following components in percentage by mole: 55-75% of SiO2; 1-10% of Al2O3; 5-20% of B2O3; and 5-30% of Li2O + Na2O +K2O, wherein the ratio of SiO2/(Li2O + Na2O + K2O) is 2.0 to 15.0. By reasonably designing the content of each component, the glass obtained by the invention has the characteristics of low transitiontemperature, excellent chemical stability, high ultraviolet transmittance and the like.

The invention provides a glass composition. The glass composition comprises the following components in percentage by mole: 55 to 80% of SiO2, 2 to 15% of B2O3, 0.5 to 10% of TiO2, 0.5 to 12% of ZnO,0 to 10% of Al2O3, 1 to 15% of Na2O and 1-12% of K2O. Through reasonable component design, the obtained glass composition has a proper thermal expansion coefficient, high ultraviolet light transmittance and excellent water resistance, acid resistance and alkali resistance, meets the requirements of large-caliber high-quality processing, and is suitable for the fields of semiconductor manufacturingand the like.

The present invention provides: a method for producing high silicate glass which has a low Fe concentration and can achieve a high UV transmittance while retaining advantages of Vycor glass that mass-production at low cost is feasible and that complex formation with various photofunctional ions can be effected; and high silicate glass of a high UV transmittance. For obtaining the above high silicate glass, the method is characterized by comprising the steps of: heating borosilicate glass including a heavy metal or rare-earth element (preferably a high-valence heavy metal or rare-earth element) so as to phase-separate the borosilicate glass; subjecting the phase-separated borosilicate glass to acid treatment so as to elute a metal; and sintering the acid-treated borosilicate glass.

A device (1) comprises a source (20) for emitting ultraviolet light, an inlet (30) for letting in fluid to the device (1), an outlet (40) for letting out fluid from the device (1), and means (51, 52) for performing a straightening action of a flow of fluid through the device (1). The flow straightening means comprise at least one flow straightening element (51, 52) having inlet openings for letting in fluid at one side and outlet openings for letting out fluid at another side, wherein each inlet opening is in communication with a plurality of outlet openings, and wherein the element (51, 52) comprises a maze of randomly arranged, interconnected holes. In such a structure, a water element that is moving from one side of the element (51, 52) to another side may take one of various paths, as a result of which variations in inlet conditions can be dampened.

The invention provides ultraviolet-transmitting glass. The ultraviolet-transmitting glass comprises the following components in percentage by weight: 55 to 70 percent of SiO2, 2 to 18 percent of B2O3, 1 to 20 percent of ZnO, 4 to 30 percent of La2O3, Y2O3 and Gd2O3, 0.5% to 20% of Ta2O5, Nb2O5, TiO2 and ZrO2, and 3 to 15% of Li2O, Na2O and K2O, wherein a ratio of (La2O3 + Y2O3 + Gd2O3)/B2O3 is 0.3 to 6.0. Through reasonable component design, the glass obtained by the invention has relatively high ultraviolet transmittance and excellent chemical stability.

The invention provides a hydrofinishing method for glycol. The method comprises two-stage hydrogenation procedures. In the primary hydrogenation procedure, a high polymer material-supported Raney nickel catalyst, a crude glycol product and hydrogen contact with each other in a first reactor for a reaction so as to obtain a first material flow; and in the secondary hydrogenation procedure, a firsthydrogenation catalyst, the first material flow and hydrogen are subjected to a contact reaction in a second reactor so as to obtain a second material flow. Optionally, the method further comprises atleast one more stage of hydrogenation after the secondary hydrogenation procedure, and a compound hydrogenation catalyst is used in each stage of hydrogenation. With the method, a poor raw glycol material (with low ultraviolet transmittance) undergoes hydrogenation and upgrading through multiple stages of hydrogenation, so polyester-grade glycol is obtained.