摘要:
A method of detecting focusing conditions used for optical machinery is disclosed. The focusing conditions of an optical image projected onto photodetector arrays arranged on both sides of the focal plane with a certain optical distance are detected based on an evaluation function representing a sum of absolute values of differences between output signals of adjacent photodetectors. When a value of a first evaluation function represented by the largest absolute value is less than a predetermined threshold a second evaluation function represented by a sum of the maximum and next largest absolute values is used thereby detecting the focusing conditions for a graded image.
摘要:
In a method and apparatus for detecting focus condition of an imaging optical system, the focus condition is detected in accordance with a combination of two different detection methods such as an image sharpness detection and an image lateral shift detection by using first and second light receiving element arrays for the image sharpness detection and a third light receiving element array for the image lateral shift detection. For making the construction of the apparatus compact and simple, these light receiving element arrays are formed on the same semiconductor substrate. Further a light flux dividing prism and a lenticular lens array are formed integrally with each other. According to the focus detection method of the present invention, it is possible to detect the focus condition for various kinds of subjects accurately over a wide range by using both the image sharpness detection and image lateral shift detection even in a range near an in-focus position.
摘要:
A focus condition of an objective lens is detected on the basis of a lateral shift of two images formed by first and second light fluxes which are transmitted through right- and left-hand halves of the lens, respectively. In order to separate the first and second light fluxes, there is arranged an array of triangle prisms each having first and second surfaces which are inclined symmetrically with respect to the optical axis of lens by a critical angle so that one of the light fluxes is transmitted through the one of the surfaces, but is totally reflected by the other surface of each prism. The first and second light fluxes transmitted through the prisms are received by an array of light receiving elements in such a manner that the first and second light fluxes are selectively received by odd and even numbered light receiving elements, respectively.
摘要:
A method for improving surface defect of specific steel resistant to concentrated nitric acid, wherein the specific steel in a molten state, either a stainless steel comprising C.ltoreq.0.1 wt %, 2.5.ltoreq.Si.ltoreq.5 wt %, Mn.ltoreq.2 wt %,15.ltoreq.Cr.ltoreq.20 wt %, 10.ltoreq.Ni.ltoreq.22 wt %,C.times.10.ltoreq. at least one of Nb, Ta and Zr.ltoreq.2.5 wt %,the balance being iron and inevitable impurities,or a high-silicon-nickel-chromium steel comprisingC.ltoreq.0.03 wt %, 5.ltoreq.Si.ltoreq.7 wt %, Mn.ltoreq.10 wt %,7.ltoreq.Cr.ltoreq.16 wt %, 10.ltoreq.Ni.ltoreq.19 wt %,C.times.4.ltoreq. at least one of Nb, Ta and Zr.ltoreq.2 wt %,the balance being iron and inevitable impurities,is admixed with titanium (0.05.ltoreq.Ti.ltoreq.0.2 wt %) when producing said steel.
摘要:
A multi-wavelength light emitting device includes the following three sections; a light source section having multiple luminous points that emit multiple light beams, a condenser lens section that concentrates the light beams emitted from the luminous points, and a light guide section that propagates superposedly and mixedly the light beams concentrated by the condenser lens section after emission thereof from the luminous points.
摘要:
A wavelength tunable filter and a wavelength tunable laser module are a codirectional coupler type whose characteristics do not vary significantly with a process error. They are structured so as to include a semiconductor substrate which has a first optical waveguide and a second optical waveguide. The first and the second optical waveguides are extended from a first side of the semiconductor substrate to an opposing second side thereof. The first optical waveguide includes a first core layer, which has a planar layout having periodic convexes and concaves, and a pair of electrodes, which vertically sandwich the first core layer. The second optical waveguide includes a second core layer, which has a lower refractive index than the first core layer. Further, a layer having the same composition and film thickness as the second core layer is placed under the first core layer.
摘要:
An object of the present invention is to provide a germanium laser diode that can be easily formed on a substrate such as silicon by using a normal silicon process and can emit light efficiently. A germanium light-emitting device according to the present invention is a germanium laser diode characterized in that tensile strain is applied to single-crystal germanium serving as a light-emitting layer to be of a direct transition type, a thin semiconductor layer made of silicon, germanium or silicon-germanium is connected adjacently to both ends of the germanium light-emitting layer, the thin semiconductor layer has a certain degree of thickness capable of preventing the occurrence of quantum confinement effect, another end of the thin semiconductor layer is connected to a thick electrode doped with impurities at a high concentration, the electrode is doped to a p type and an n type, a waveguide is formed so as not to be in direct contact with the electrode, and a mirror is formed at an end of the waveguide.
摘要:
There is provided a convenient and inexpensive method of producing a compound which has a high activity of inhibiting replication of hepatitis C virus (HCV) and is useful for preventing and treating a liver disease caused by HCV infection.It is a method of biologically producing a compound represented by the formula (1): [wherein A represents a hydrogen atom, a straight or branched alkyl group having 1 to 8 carbon atoms, or the like], or a pharmaceutically acceptable salt thereof, a method comprising adding an amino acid derivative represented by the formula (3): [wherein A has the same meaning as defined for the compound of the above formula (1); and R represents a hydrogen atom, a straight or branched alkyl group having 1 to 8 carbon atoms, or the like], or a salt thereof into the fungal mycelium or the culture medium/culture broth of a filamentous fungal strain having an ability to produce the compound represented by the formula (2): to thereby cause the fungal strain to directly produce the compound of the formula (1).
摘要:
A battery is provided which has a high capacity and can improve battery characteristics, such as cycle characteristics. The battery includes a spirally wound electrode body, wherein a cathode and an anode are wound with a separator in between. The anode includes, for example, simple substances, alloys, compounds of metal elements or metalloid elements capable of forming an alloy with Li, the like and combinations thereof. An electrolytic solution wherein an electrolyte salt is dissolved in a solvent is impregnated in the separator. For the electrolyte salt, a light metallic salt having B—O bond or P—O bond, such as difluoro[oxalato-O,O′]lithium borate and tetra fluoro[oxalato-O,O′]lithium phosphate, can be used. By forming a stable coating, decomposition reaction of the solvent can be inhibited, and reaction between the anode and the solvent can be prevented.
摘要:
The object of the present invention is to provide a pharmaceutical composition for preventing or treating viral infectious diseases. The compounds of the present invention have extremely potent anti-HCV activity and HCV growth inhibitory effects, and since they also only demonstrate mild cytotoxicity in vivo, a pharmaceutical composition containing the compound of the present invention is extremely useful as an anti-HCV preventive/therapeutic agent.