摘要:
In a method of making a high-quality silica glass, a rare earth element that is a substance making a great contribution to the index of refraction is introduced therein together with aluminum for stabilizing the glass. An alkoxide of aluminum or its derivative is used as the starting material for preparing a boehmite sol. A salt of at least one element selected from rare earth elements or a solution in which the salt is dissolved and the boehmite sol are mixed with a silica sol, whereupon the sols are vitrified.
摘要:
An immersion solution for a microscope, the immersion solution including a metal-halogeno complex anion containing bromine or iodine and one or more types of metal elements M selected from Sn, In, Bi, Sb, Zn and Al, and an imidazolium cation, a pyridinium cation, a pyrrolidinium cation or an ammonium cation. The immersion solution includes an ionic liquid that transmits light having a predetermined wavelength, has a refractive index of no less than 1.60 and is used for a fluorescence microscope.
摘要:
The invention provides a fabrication process for single-crystal optical devices wherein, in a processing step for a single-crystal optical device, at least one heating treatment is implemented at a temperature that is 0.50 times to less than 0.67 times as high as the melting point of a single-crystal material after a member is cut out of a matrix material for the single-crystal material having a melting point of greater than 2,000° C. to less than 2,900° C. and before an optical device assembling step.
摘要:
The immersion oil has refractive index which is 1.70 or more, and is low autofluorescence. Preferably, the main ingredient is iodine compounds (diiodomethane), and a solid having a high refractive index such as sulfur and the like is dissolved or dispersed into the immersion oil. The production method of the immersion oil has a purification process, in which impurities are removed preferably by adsorbent, distillation or recrystallized. In the method of preservation of the immersion oil, it is always contacted with the adsorbent. The preservation container of the immersion oil contains an adsorbent which is always contacted with the immersion oil.
摘要:
In a connector including a contact and a housing holding the contact, a shell is coupled with the housing. The housing has a coupling portion to be coupled with a mating connector in a first direction. The contact has a contacting portion disposed in the coupling portion. The shell includes an opening edge defining an opening faced to the coupling portion and a guide portion disposed in the coupling portion to guide movement of the mating connector in the first direction.
摘要:
A semiconductor light emitting element comprising plural semiconductor layers inclusive of a light emitting part having a pn junction, which are laminated on a crystal substrate, wherein a first semiconductor layer, having a carrier concentration of not more than 5.times.10.sup.17 cm.sup.-3 and a band gap of not less than the energy of the light emitted from the light emitting part, is formed in the passage of the light emitted from the light emitting part toward the substrate side, and a second semiconductor layer, having a carrier concentration of not more than 5.times.10.sup.17 cm.sup.-3 and a band gap of not greater than the energy of the light emitted from the light emitting part, is formed behind (when seen from the passage of the light) the first layer. According to the present invention, sub-peak wavelength light emission can be suppressed to a satisfactory degree.
摘要翻译:一种半导体发光元件,包括层叠在晶体基板上的包含pn结的发光部的多个半导体层,其中载流子浓度为5×10 17 cm -3以下的第一半导体层和带隙 在从发光部朝向基板侧的光的通过中形成不小于从发光部发出的光的能量的第二半导体层,其载流子浓度不大于5×10 17 cm 3,并且在从第一层的后面(从光的通过时看)形成不大于从发光部发射的光的能量的带隙。 根据本发明,可以将亚峰值波长发光抑制到令人满意的程度。
摘要:
The fluorescence observation or fluorescence photometry system uses an optical base material having low autofluorescence and good adhesive property to cell. Said optical base material has the following optical characteristics: 1.3≦nd≦1.9 15≦νd≦100 where nd represents refractive index in d line, and νd represents Abbe number in d line; and, an optical instrument constituted for enabling a fluorescence observation and/or a fluorescence measurement is arranged. Thereby, a fluorescence observation or a fluorescence photometry system, and a fluorescence observation or a fluorescence photometry method in which sufficient signal obtained from a cell can be obtained as much as possible, and more accurate observation and measurement can be promoted is offered.
摘要:
In a connector including a contact and a housing holding the contact, a shell is coupled with the housing. The housing has a coupling portion to be coupled with a mating connector in a first direction. The contact has a contacting portion disposed in the coupling portion. The shell includes an opening edge defining an opening faced to the coupling portion and a guide portion disposed in the coupling portion to guide movement of the mating connector in the first direction.
摘要:
A composition has a durability to a sterilization treatment using vapor under high temperature and pressure and capable of transmitting or absorbing light. The composition comprises a group A including 15 to 23 mol % of lanthanum oxide, 3 to 8 mol % of gadolinium oxide, 3 to 8 mol % of tantalum oxide, and 8 mol % or less of yttrium oxide; a group B including 30 to 45 mol % of boron oxide, 20 mol % or less of silicon oxide, and 20 mol % or less of germanium oxide; zero mol % of alkaline metal oxide or alkaline earth metal oxide; and a group D including 0.3 to 15 mol % of niobium oxide and 3 to 15 mol % of zirconium oxide. A mol % ratio A/B between the group A and group B is 80% or more, and a dissolving-out rate of metal ion of the composition is 0.002×10−6 mol/hour or less per square centimeter. In case of applying the composition to an endoscope including an observation system and an illuminating system, an optical element disposed at the outer surface of the observation system and an optical element disposed at the outer surface of the illuminating system are formed of the composition.
摘要:
A porous body containing a silicon component as a starting material of optical element is immersed in a solution containing hydrofluoric acid, taken out from the solution and immersed in a solution containing a metal alkoxide containing a first metal component except silicon or a derivative thereof so that the porous body contains the first metal component in such a concentration gradient that the concentration of the first metal component decreases from a periphery of the porous body toward a center of the porous body. Hydrofluoric acid breaks glass bonds of the porous body, so that the concentration of the first metal component can be securely distributed in a desired gradient. Drying and sintering of the porous body enables producing, for example, a glass having a metal component concentration concavely distributed in its radial direction which is excellent in chromatic aberration suppressing capability. After the immersion in the solution of first metal component, the porous body can be immersed in a solution of second metal component to thereby provide the porous body with a concentration gradient of second metal component.