3 results about "Luminous intensity" patented technology

The present invention provides a temperature sensitive paint for low-temperature use which shows durability at low temperatures, has a high light emission intensity, and makes it possible to perform precise temperature measurements of surface temperature fields by applying the paint to the surface of an object and measuring the light emission even in cases where the measurement distance is long in, for example, a large cryogenic wind tunnel or the like. The temperature sensitive paint for low-temperature use contains a ruthenium complex having a high light emission intensity as a temperature sensitive luminophore, a urethane type polymer as a binder, and an alcohol organic solvent as a solvent. Use of an alcohol organic solvent makes it possible to dissolve a temperature sensitive luminophore at a high solubility and to increase the light emission intensity by raising the temperature sensitive luminophore concentration in the coating film, so that more precise temperature measurements can be performed. By using the urethane type polymer having the durability at low-temperature, it is possible to obtain durability where no cracks occur at low temperatures even when the film thickness is increased. Therefore, adjustment of the light emission intensity and surface treatment such as surface polishing and the like can be performed by using this temperature sensitive paint for low-temperature use.

The invention belongs to the field of luminescent materials and relates to violet-LED excited blue fluorescent powder and a preparation method thereof. The chemical structural formula of the violet-LED excited blue fluorescent powder is M1-xMgSi5Al10O27: xEu<2+>, wherein M is one of Ca, Sr and Ba, x represents a molar coefficient, and x is greater than 0 and less than 1. The blue fluorescent powder has an extremely wide excitation peak, has strong absorption within the range of 250nm to 375nm, and can be well matched with a violet chip; the emission spectrum of the blue fluorescent powder is located within the range of 400nm to 540nm, and therefore, the blue fluorescent powder is high in luminous intensity and has a relatively high commercial application value; the preparation method of the blue fluorescent powder has the advantages of easily available raw material, simple process and low cost.

The invention belongs to the technical field of gain materials, and discloses bismuth-thulium co-doped gain glass with an efficient broadband and a preparation method of the bismuth-thulium co-doped gain glass. The gain glass is mainly prepared from the following raw materials: GeO2, SiO2, Bi2O3 and Tm2O3; the molar dosage of the GeO2 is 10 to 40 percent, and the molar dosage of the SiO2 is 60 to 90 percent; the use amount of Bi2O3 is 0.001-5% of the total molar weight of GeO2 and SiO2, and the use amount of Tm2O3 is 0.01-5% of the total molar weight of GeO2 and SiO2. The method is a gas suspension furnace method. The gain glass provided by the invention has continuous ultra-wideband luminescence of 1000-2000 nm, and covers O, E, S, C, L and U wave bands. The method provided by the invention improves the luminous intensity of the glass material. The bismuth-thulium co-doped gain glass material is used as a gain medium to be used in the fields of optical fiber amplifiers and lasers.