Canon Kabushiki Kaisha

Asahi Kasei Microdevices Corporation

Sony Corporation

Kimmon Koha Co., Ltd.

Taiheiyo Cement Corporation

Takeshi Hamada

Masayuki Hongu

Shinji Motokoshi

Yoko Shimizu

Manami Gunji

Yasushi Fujimoto

Paul Binun

Masamori Nakahara

Yuta Nakamura

Takayuki Sato

Hiroshi Yano

Takashi Arai

Yoshio Ishigaki

Kazuo Yamagiwa

Kazuaki Maruhashi

Tadanori Saito

Takamichi Kosugi

Yuya Nagata

Yoshihiko Koizumi

Yasuhide Higo

Takutomi Ogawa

Eichi Manabe

Naohiro Arai

Manabu Abe

Takao Kimura

Minoru Yoshimoto

Hironobu Makara

Tsubasa Nakatani

A laser apparatus includes: a laser oscillator that includes a mirror and emits a laser beam; and an external resonator that includes a nonlinear optical crystal that functions as a phase conjugate mirror. The phase conjugate mirror reflects the laser beam and produces a phase conjugate wave that reaches the mirror of the laser oscillator, and the mirror of the laser oscillator and the phase conjugate mirror cause laser oscillation such that a wavelength and a phase of the laser beam oscillated by the laser oscillation are automatically fixed.

Laser apparatus

An oscillator circuit includes: a first temperature detector, detecting an internal temperature of the oscillator circuit; a current generator, generating a heater current so that the internal temperature matches a target temperature; a first and second heater, heating the resonator and the integrated circuit, respectively, based on the heater current; a second temperature detector, detecting a temperature of the integrated circuit; a first compensation voltage generation circuit, generating a first compensation voltage for compensating for a frequency variation due to a temperature change in the integrated circuit, based on a detection result of the second temperature detector; a second compensation voltage generation circuit, generating a second compensation voltage for compensating for a frequency variation due to a temperature change in the resonator, based on a detection result of the first temperature detector; and an oscillator, generating an oscillation signal based on the first and second compensation voltages.

Oscillator circuit and temperature compensation method for oscillator circuit

An image pickup apparatus having extendibility. The image pickup apparatus includes a front case that forms an apparatus appearance, a rear case that forms the apparatus appearance with the front case, and panel members. At least one of the front case and the rear case has arms that extend in a direction approximately parallel to an optical axis of the image pickup apparatus and that are united with at least one of the front case and the rear case. The front case and the rear case are connected through the arms. The panel members are fixed to the front case and the rear case so as to cover openings formed in a state where the front case and the rear case are connected through the arms.

Image pickup apparatus having extendibility

A fiber laser apparatus includes: a short-length type fiber to which an active element is added and that has a length of 300 mm or less: a ferrule attached to an end of the fiber; and a housing that accommodates the fiber and supports the fiber with the ferrule. Each of the housing and the ferrule is composed of a material having a first thermal expansion coefficient that is equal to or have a predetermined difference from a second thermal expansion coefficient of a raw material of the fiber. The predetermined difference between the first and second thermal expansion coefficients is within &#x2212;8.6&#xd7;10to 11.4&#xd7;10/K.

Fiber laser apparatus

An image capture apparatus to which a module having a predetermined function can be attached, the apparatus comprises a connecting unit configured to attach the module, a heat transfer unit configured to exchange heat with the module, a communication unit configured to communicate with the module, and a control unit configured to control a heat dissipation state of a system including the image capture apparatus and the module on the basis of information pertaining to heat dissipation performance of the module and position information pertaining to an attachment position of the module, the information having been acquired by the communication unit.

Image capture apparatus, module, and control method thereof

An image pickup apparatus on and from which a lens unit can be mounted and removed. The image pickup apparatus includes an image pickup device, a mount part on and from which a lens unit is mounted and removed on the image pickup apparatus, a light shielding member that is provided between the image pickup device and the mount part, and shields light in a peripheral part of a light flux guided by the lens unit by adjusting an opening amount in a photographic optical path. The opening amount of the light shielding member is controlled based on information on the lens unit mounted on the mount part.

Image pickup apparatus that controls image pickup apparatus body according to lens barrel mounted thereon, and method of controlling the same

An image pickup apparatus improved in heat dissipation efficiency. An image pickup section includes an image pickup device. A circuit board includes an image processor for processing on output from the image pickup device. A duct section has a fan for discharging heat generated on the circuit board to the outside. A rear cover forming a part of an exterior is disposed at the rear of the apparatus in an optical axis direction. The circuit board is disposed between the duct section and the rear cover in the optical axis direction. The duct section includes a plurality of extended portions which are extended in the optical axis direction to surround the circuit board and are in contact with the rear cover.

Image pickup apparatus that is improved in heat dissipation efficiency, electronic apparatus, and accessory

There is provided a charge pump circuit suited for reducing the power consumption. A capacitor, a capacitor, a capacitor, and switching elementsto, for electrically connecting or separating capacitors, and, repeats: a first state where charge supplied from an input power-supply voltage Vis accumulated in the capacitorsand; a second state where the charge accumulated in the capacitoris transferred to the third capacitor, and a positive output power-supply voltage is held by the charge accumulated in the capacitor; a third state where the charge supplied from an input power supply is accumulated in the capacitorsand; and a fourth state where the charge accumulated in the capacitoris transferred to the third capacitor, and the positive output power-supply voltage Vis held by the charge accumulated in the capacitor

Charge pump circuit, control method thereof, and semiconductor integrated circuit

Provided is a charge pump circuit which is preferably used for reducing noise generated when electric charges are accumulated in a capacitor of the charge pump circuit. A load driving systemincludes a charge pump circuit, a clock generation circuit, an amplifier circuit, and a load. The charge pump circuitincludes capacitors Cand C, a transistor PTrwhich is a P-channel MOS transistor and controls current supply to the C, switching elements SWto SW, and a supply current control circuit. The charge pump circuitswitches the SWto SW, to thereby perform the accumulation of electric charges to the Cand the transfer of the accumulated electric charges to the Cfor generating a negative power source. The supply current control circuitincludes a transistor PTr, a switching element SW, and a transistor NTrwhich forms a current mirror with a transistor NTrwhich constitutes an output stage of the amplifier circuit. The Cis charged with a supply current which is positively correlated with a load current via the NTr, the SW, the PTr, and the PTr

Charge pump circuit and semiconductor integrated circuit

It is aimed at providing a heavy concrete, which does not require addition of a thickener such as methyl cellulose, which is less in segregation between a heavy aggregate and a cement paste, and which is high in flowability and excellent in construction ability. The present invention provides a heavy concrete comprising, at least, a cement, a heavy aggregate, and water, mixed with one another, characterized in that the heavy fine aggregate includes hot scarves brought about in a scarfing process of a steel slab surface. The present invention further provides the above-described heavy concrete characterized in that the heavy fine aggregate includes fine aggregate particles passing through a sieve having a nominal size of 0.15 mm, in an amount of 10% to 20% in mass percentage, and the heavy fine aggregate includes spherical particles each having a distortion irregularity of 3.3 or less as defined below, in an amount of 20% or more in the whole of particles having diameters between 50 &#x3bc;m inclusive and 5 mm inclusive in the heavy fine aggregate:[Distortion irregularity]=[Length of circumferential outline of particle]/[Diameter of true circle having the same area as the area of the particle providing the outline].

Heavy concrete

A video signal processing circuit includes an amplifier with a circuit connected to it to emphasize the amplification of some frequencies relative to others. A non-linear circuit is also connected to the amplifier and comprises a capacitor connected in series with non-linear elements that change the amplification of positive and negative overshoots of the signal relative to the middle amplitude range. The result is non-linear modification of emphasis and can be used to pre-emphasize video signals before using them to modulate the frequency of a carrier and, in the playback section to de-emphasize the signals to minimize FM noise. Use of the capacitor prevents direct current from flowing and thus affecting the threshold levels of the non-linear elements. Component values can be selected to effect temperature compensation.

Capacitive-type nonlinear emphasis circuit

A multivibrator circuit has a main constant current source through which the main portion of the current of the multivibrator circuit is supplied and a by-pass current source through which a portion of the current to be supplied to the main constant current source is supplied, whereby the duty cycle of the multivibrator circuit is controlled. When the by-pass current is changed, the frequency of the multivibrator circuit is changed. The frequency of the multivibrator, when used as the frequency-modulated oscillator in a video tape recorder, may thus be set regardless of the signal clipping level and signal clamping level in a video recording circuit of the video tape recorder.

Growing community of inventors

Tokyo, Japan

Takeshi Hamada