摘要:
A large aperture zoom optical system and an image pickup apparatus have a five-lens-group arrangement of positive-negative-positive-negative-positive refractive powers. At the time of zooming, the fifth lens group is fixed, and at least the second lens group, the third lens group and the fourth lens group are moved. The third lens group for use in focusing is composed of a single lens element.
摘要:
There is provided a voltage controlled oscillator that is compact and can be manufactured at low cost. The voltage controlled oscillator is structured to include: a resonance part including a variable capacitance element and an inductance element, the variable capacitance element having a capacitance that varies according to a control voltage for frequency control input from an external part, and a series resonant frequency of the resonance part being adjusted according to the capacitance; an amplifying part amplifying a frequency signal from the resonance part; and a feedback part including a capacitance element for feedback and feeding the frequency signal amplified by the amplifying part back to the resonance part to form an oscillation loop together with the amplifying part and the resonance part, wherein the amplifying part is provided in an integrated circuit chip, and the resonance part and the capacitance element for feedback are formed as circuit components separate from the integrated circuit chip. The circuit components are selected according to an oscillation frequency.
摘要:
A high quality 3,4-dihydro-1,2,3-oxathiazin-4-one-2,2-dioxide compound or a salt thereof is obtained easily and efficiently.When the compound represented by the following formula (2) (wherein, R1, R2, and R3 are hydrogen atom or an organic group inert to the reaction, and X is hydrogen atom) or a salt thereof is produced by cyclization of a mixture of β-ketoamide-N-sulfonic acid represented by the following formula (1) or a salt thereof and an inert solvent and a mixture of acid anhydride and an inert solvent, and by subsequent hydrolysis of the product, a step of (A) hydrolyzing the reaction product obtained by the cyclization by mixing with an aqueous solution of sulfuric acid so as a concentration of sulfuric acid in an aqueous phase after the hydrolysis would become 30% by weight or more, and then separating an organic phase and an aqueous phase, or a step of (B) washing the organic phase liquid after the hydrolysis with an aqueous solution of sulfuric acid with a concentration of 30% by weight or more is at least carried out.
摘要:
A zoom lens system includes, in order from an object side: a first lens group having a negative optical power, a second lens group having a negative optical power, and, a third lens group having a positive optical power. The position of the first lens group is fixed during zooming, and the third lens group includes three single lenses including, in order from the object side, a third-first lens being a single lens having a positive optical power, a third-second lens being a single lens having a negative optical power and a third-third lens being a single lens having a positive optical power. The zoom lens system satisfies the following conditional expression: 0.35
摘要:
An image-taking lens unit has an image-taking lens system that forms an optical image of an object and an image sensor that receives the optical image in a rectangular image-sensing region and converts the optical image into an electrical signal. The image-taking lens system includes a reflective optical element that bends the optical path. Of the lens elements constituting the image-taking lens system, the most image-side lens element called the last lens element is molded of resin, and is given a non-circular outer shape fulfilling a prescribed condition.
摘要:
In a system for providing an illegal use research service for image data, the image data received from a terminal apparatus is registered as a research subject, a research condition for research whether or not the image data being registered is illegally used by a Web site on the network is set, image data that are identical or similar to the image data being the research subject from a web site on the network are searched for based on a feature amount and the research condition, and a search result is informed as a research report to the research client using said terminal apparatus.
摘要:
A method produces a 3,4-dihydro-1,2,3-oxathiazin-4-one-2,2-dioxide compound of following formula (2): wherein R1 and R2 are the same as or different from each other and are each hydrogen atom or an organic group inert to the reaction; and R3 is hydrogen atom or an organic group inert to the reaction, or a salt thereof, by subjecting a beta-ketoamide-N-sulfonic acid of following Formula (1): wherein R1, R2 and R3 are as defined above; and X is hydrogen atom, or a salt thereof, to cyclization in the presence of an acid anhydride with or without further subjecting the cyclized product to hydrolysis, in which the cyclization is continuously carried out using a continuous flow reactor.
摘要:
In the transfer and entry of one-touch dial data or speed dial data from a facsimile apparatus 1 to a facsimile apparatus 10, the respective sizes of one-touch dial memory and speed dial memory in the facsimile apparatus 10 are detected. The one-touch dial data are transferred and entered in the facsimile apparatus 10 (P1). The speed dial data are transferred and entered in the facsimile apparatus 10 (P2). Any remaining speed dial data are entered in the one-touch memory (P3). This reduces or eliminates overflow of the one-touch dial data or speed dial data.
摘要:
A vehicle power transmission device in which an engine 61 equipped with a turbo charger 62 and a fluid coupling 2 with a lockup clutch are combined together, wherein a timing for connecting the lockup clutch 25 is normalized to accomplish a smooth connecting during the low-speed traveling after the start. A lockup clutch control device is equipped with means for detecting the operating condition of the turbo charger 62, and the lockup clutch 25 starts to be connected at a moment before the turbo charger 62 reaches a high output state. The lockup clutch 25 is connected within a short period of time without producing a shock due to connection and the vehicle, thereafter, accelerates smoothly. A rate of change in the revolution of the engine 61 or the pressure in the intake pipe 63 is detected to detect the operating condition of the turbo charger 62.