Abstract:
A porous glass having high strength and a low refractive index, an optical member by using the porous glass, and a method for manufacturing the porous glass are provided. A method for manufacturing a porous glass includes the steps of heat-treating a glass body, which can be phase-separated through heating and which is formed from a plurality of components, at a first temperature to effect the phase separation, heat-treating the glass body, which has been heat-treated at the first temperature, at a second temperature, higher than the first temperature, to effect the phase separation, and bringing the glass body, which has been heat-treated at the second temperature, into contact with an aqueous solution, wherein the total time of the heat treatment time at the first temperature and the heat treatment time at the second temperature is 7 hours or more.
Abstract:
The present invention provides a porous glass having excellent antireflection performance for visible light. A porous glass includes a porous layer which is mainly composed of silica and which has pores attributed to spinodal phase separation and pores attributed to binodal phase separation.
Abstract:
An internal treatment apparatus for a patient having a flexible tubular body to be introduced into a patient includes a center opening for inserting therethrough an endoscope for observing a target site, the center opening being circular in cross section and disposed at a center of an end face of the flexible tubular body; and a plurality of circumferential apertures through which surgical instruments are inserted for performing a surgical procedure on the target site, the plurality of circumferential apertures being provided in the flexible tubular body at equi-angular intervals around the center opening.
Abstract:
With a simple configuration, the rounding accuracy upon quantization is dynamically changed so as to effectively suppress the encoding noise and prevent image deterioration. An image signal is subjected to DCT and a DCT coefficient obtained by this is input to a quantization circuit (30), quantized by a quantization matrix, and supplied to a multiplier (33) via an absolute value circuit. A quantization scale value in accordance with the generated code amount in the entire screen output from a rate control block (39) is inversed and supplied to the multiplier (33). Simultaneously with this, in an M setting block (38), a value M as a parameter controlling the rounding accuracy is set in accordance with the quantization scale value. In an adder (34), the value M is added to the output from the multiplier (33), and in a 5-bit shift circuit (35), rounding is performed by discarding the decimal portion. Here, as the quantization scale value increases, the quantization rounding accuracy is changed in the discarding direction. Thus, the DCT coefficient entered is qunatized without increasing its amplitude, thereby suppressing the encoding noise.
Abstract:
The present invention provides a porous glass having excellent antireflection performance for visible light. A porous glass includes a porous layer which is mainly composed of silica and which has pores attributed to spinodal phase separation and pores attributed to binodal phase separation.
Abstract:
A toner is provided which is excellent in development stability in both a low-temperature, low-humidity environment and a high-temperature, high-humidity environment over a long time period. The toner includes toner particles containing at least a binder resin and a colorant, and a fatty acid metal salt. The fatty acid metal salt has a volume-based median diameter (D50s) of 0.15 Êm or more and 0.65 Êm or less, and the liberation ratio of the fatty acid metal salt in the toner is 1.0% or more and 25.0% or less.
Abstract:
To provide a one-part type heat curable composition which exhibits superior adhesion properties, is easily cured by heating, does not soften even if the composition is baked at increased temperature, is completely cured by means of moisture in the atmosphere even if curing is not sufficient due to heating temperature, heating period, and the like, and exhibits increased adhesiveness with respect to a coating film after the composition is cured. A one-part type heat curable composition comprising: (A) a prepolymer having a urethane bond(s), and an isocyanate group (s) at a chain end or pendent position (s) thereof; (B) an amine-adduct type latent hardener; and (C) a moisture latent hardener.
Abstract:
A device for generating a characteristic time, which is built in a computer as shown in the figure by way of example. The computer includes a CPU (1), a memory (2) and an input/output device (3). The CPU (1) is provided with clock (4) and a counter (5). The memory (2) includes a section (6) for storing a period of elapsed time and a section (7) for updating a period of elapsed time. The section (6) for storing a period of elapsed time stores the total amount of time to be counted, for example, 3,155,692,500.97 sec (in 1/100 sec steps) corresponding to 100 years, as a total time Tt. The clock (4) is associated with a section for constantly counting the total time Tt, and the counter (5) calculates the cumulative time Tn from 0 to the total time Tt and the differential time (Tt - Tn) required to count down from the total time Tt to 0, thereby constantly counting elapsed time. The elapsed time counted by the device for generating a characteristic time can be outputted to another computer by the input/output device (3), whereas the elapsed time counted by another computer can also be inputted by the input/output device (3).
Abstract:
Provided is an optical member having high strength, low reflection, and a high transmittance. The optical member includes: a transparent substrate; and a porous glass layer having a spinodal-type porous structure disposed on the transparent substrate, in which at least one of the average pore diameter of a pore formed in the porous glass layer and the average skeleton diameter of a skeleton of the porous glass layer is set so that the optical member has a transmittance of 50% or more in the wavelength region of 450 nm or more and 650 nm or less.
Abstract:
A toner is provided that exhibits a high long-term image stability even during high-speed printing and that also exhibits an excellent environmental stability. The toner comprises a binder resin, a colorant, and a nonionic surfactant, wherein the nonionic surfactant has an oxyethylene group (EO) and an oxypropylene group (PO) and has a ratio of the number of moles of the oxypropylene group to the number of moles of the oxyethylene group (PO/EO) of at least 0.01 and not more than 5.00; and when A (μg/g) is defined as a nonionic surfactant content on the surface of the toner that can be extracted by methanol from 1 g of the toner and B (mソ2?/g) is defined as a theoretical specific surface area determined from a toner particle diameter distribution obtained by a precision particle diameter distribution analyzer that operates based on an aperture electrical resistance method, a ratio A/B is at least 100 μg/mソ2? and not more than 9000 μg/mソ2?.
Abstract translation:提供即使在高速印刷期间也表现出高的长期图像稳定性并且也表现出优异的环境稳定性的调色剂。 调色剂包括粘合剂树脂,着色剂和非离子表面活性剂,其中非离子表面活性剂具有氧化乙烯基(EO)和氧化亚丙基(PO),并且氧化丙烯基的摩尔数与 氧乙烯基(PO / EO)的摩尔数为至少0.01且不大于5.00; 并且当将A(μg/ g)定义为可从1g调色剂中由甲醇萃取的调色剂表面上的非离子表面活性剂含量,并且将B(m 2 2 / g)定义为理论比表面积 由通过孔径电阻法操作的精密粒径分布分析仪获得的调色剂粒径分布确定的面积,A / B比至少为100μg/ m 2〜 不超过9000μg/ m 2。