摘要:
A method for fabricating a semiconductor laser includes forming a double heterojunction structure on a first conductivity type semiconductor substrate; forming the double heterojunction structure into a stripe mesa shape by selective etching; successively growing a first conductivity type layer, a second conductivity type current blocking layer, and a first conductivity type current blocking layer on opposite sides of the mesa to embed the mesa; and adding an impurity from a surface of the first conductivity type current blocking layer to form impurity doped regions that electrically separate the second conductivity type current blocking layer from an upper part of the mesa at opposite sides of the mesa.
摘要:
A self-hardening mold material composition comprising 100 parts by weight of molding sand, 0.1 to 6 parts by weight of a component (a), 0.1 to 4 parts by weight of a component (b), 0.05 to 2.0 parts by weight of a component (c) as SiO.sub.2, and 0.01 to 0.5 parts by weight of a component (d) on the basis of 100 parts by weight of the component (b), wherein the component (a) is an organic polyisocyanate having at least two isocyanate groups; the component (b) is a polyetherpolyol mixtures comprising aminopolyetherpolyol, obtained by addition reaction of aliphatic or aromatic amine with alkylene oxide, and a non-aminopolyetherpolyol and containing 5 to 85% by weight of primary hydroxyl-containing polyetherpolyol, the component (c) is at least one of silicate ester, its hydrolysis products, a water dispersion-type silica sol and an alcohol dispersion-type silica sol; and the component (d) is a reaction catalyst, can produce a mold having a good strength after being left standing in the atmosphere at the ordinary temperature and after a molten metal is poured therein, a good shake-out when the mold is dismantled, without any need for mold wash at all or with a need only for simple mold wash.
摘要:
A scroll compressor comprises a compression mechanism comprising a combination of a fixed scroll and an orbiting scroll; a main shaft for driving the orbiting scroll; an electric motor rotor and stator for driving the shaft; a first bearing frame for supporting the orbiting scroll in the axial direction through a bearing; a second bearing frame for supporting the shaft in the radial direction through a bearing; a hermetic shell including the compression mechanism in an upper portion, the rotor and stator in a lower portion, and an suction pipe for inspiring a working fluid; and a dividing chamber arranged in the shell so as to communicate with the suction pipe and having efflux holes for directing the inspired working fluid to the compression mechanism in the upper portion, the stator and rotor in the lower portion, and an upper coil end of the stator placed in a position lateral to the chamber.
摘要:
An electronic photographing apparatus including a photosensor for converting an optical image, which enters through an objective lens, to an electric signal, and two comparators to which a video signal obtained by signal-processing the electric signal is supplied. Supplied to the comparators, respectively, are a reference voltage slightly lower than the saturation level of the video signal and a reference voltage slightly higher than the black level of the video signal. The comparators convert the video signal to a binary signal according to the reference voltages. The binary signals are supplied to a video signal processing circuit and are converted to a binary video signal. When the binary video signal is supplied to the display of an electric finder, an image which is over- or/and underexposed is displayed on the display. When the binary signal is supplied to an automatic exposure unit, the exposure of the scene is automatically controlled according to the over- or/and underexposure.
摘要:
A microscope objective comprising a first, second, third, fourth and fifth lens components wherein the first lens component is a positive meniscus lens or biconvex lens, the second lens component is a negative lens, the third lens component is a cemented doublet, the fourth lens component is a cemented doublet, and the fifth lens component is a positive cemented doublet, the microscope objective having an extremely low magnification, being arranged to be parfocal with microscope objectives with high magnifications, and having aberrations corrected favorably.
摘要:
A wide-angle retrofocus lens system comprises a first lens component comprising a positive meniscus lens having its convex surface on the object side, a second lens component comprising a negative meniscus lens having its convex surface on the object side, a third lens component comprising a positive cemented lens component of a positive lens and a negative lens, a fourth lens component comprising a negative lens, a fifth lens component comprising a positive meniscus lens having its convex surface on the image side, and a sixth lens component comprising a positive lens. The system is arranged to satisfy the predetermined conditions so that, despite the use of a small number of component lenses, the overall length of the system can be made short, the back focal length long and various aberrations are well-corrected over a wide angle of image field.
摘要:
A photographic lens system of modified Gauss type having five-component six-element lens configuration for which the field angle is 41.degree. to 53.degree., aperture ratio is F1:2, overall length is short, back focal length is long and aberrations are corrected favorably.
摘要:
A lentiviral vector was used to produce non-human animals that express human sFLT1 specifically in the murine placenta, to provide model animals of diseases such as pregnancy-induced hypertension syndrome that are close to the clinical conditions, methods for producing the model animals, methods of screening for candidate compounds as therapeutic agents for diseases such as pregnancy-induced hypertension syndrome by using the model animals, and therapeutic agents for diseases such as pregnancy-induced hypertension syndrome. As a result, the model animals were found to exhibit symptoms that are very close to the clinical conditions in human, which are presentation of hypertension as well as placental insufficiency, intrauterine growth retardation, glomerulosclerosis, and proteinuria during pregnancy, and improvement of those symptoms postpartum. Furthermore, when pravastatin was administered to this model animal, it was found that diseases such as pregnancy-induced hypertension syndrome were improved by the activation of placenta-derived growth factor (PIGF) which antagonizes sFLT1.
摘要:
A deposition apparatus includes a processing chamber internally having a reduced-pressure space for deposition process to be carried out therein, a base material holding member for holding a base material to be subjected to the deposition process, a target support member for supporting a target thereon, and a power supply unit for applying electric power to the target support member to generate a plasma in the reduced-pressure space. In the deposition apparatus, deposition process is carried out by using the target, which has a recess portion in its surface and in which a powder target formed of a powder material is placed in an inner surface of the recess portion. Thus, the in-plane uniformity of deposition rate is improved and a stable film deposition is fulfilled.
摘要:
A plasma processing method capable of processing an object with fine linear portions. The method employs a plate-shaped insulator that is disposed adjacent to a plate-shaped electrode. In the method, a discharge gas containing an inert gas is supplied to a vicinity of an object to be processed from one gas exhaust port located near the plate-shaped electrode, out of at least two-line gas exhaust ports which are disposed adjacent the plate-shaped electrode. The exhaust ports are formed on opposite sides of the plate-shaped insulator and are different in distance to the plate-shaped electrode. A discharge control gas is supplied from the other gas exhaust port to the vicinity of the object. Simultaneously with the supply of the gases, electric power is supplied to the plate-shaped electrode or the object, by which plasma processing of the processing object is carried out.