Mitsubishi Denki Kabushiki Kaisha

Mitsubishi Electric Corporation

Izumi Mikami

Aki Sasaki

Kazuyuki Takada

Yoshihiko Konishi

Kouki Asari

Tsuyoshi Ishikawa

Hiroyuki Sato

Yoshihito Hirano

Hiroyuki Kawano

Takafumi Endo

Jiro Suzuki

Tadashi Minobe

Izuru Naito

Yutaka Ezaki

Kenichi Nishiguchi

Hiroshi Suzuki

Tomohiro Mizuno

Toshiyuki Ando

Shusou Wadaka

Tadashi Matsushita

Hiroyuki Satou

Yasushi Horiuchi

Masaki Tabata

Noboru Itoh

Keizou Miyawaki

Kouji Namura

Yasuchika Hatanaka

Hidekazu Edo

Takashi Harada

Kazurou Nishi

An image sensing apparatus having a large depth of focus (DOF) and being compact in size is provided. The image sensing apparatus includes a plurality of light sources that shines light beams on an illumination portion of a document; a first mirror that receives incident light scattered by reflection from the document, to reflect the scattered light in the secondary scan direction; a plurality of first concaved aspheric mirrors that collimates light beams from the first mirror, to reflect therefrom the collimated light beams as substantially collimated light fluxes; an aperture mirror that reflects therefrom the light beams from the respective first aspheric mirrors, through apertures each having a light-shielded portion formed therearound and selectively passing the light beams therethrough; a plurality of second concaved aspheric mirrors that receives the light beams incident from the respective aperture mirror, to reflect the incident light beams as converging light beams; a second mirror that reflects the light beams in a direction perpendicular to the surface of the document, disposed on a path of the light beams to be converged by means of the second aspheric mirrors; a plurality of light receivers each having a light-receiving area that receives the light beams from the second mirrors, to form images according to the light beams from the respective apertures; and a casing where the first and second aspheric mirrors are disposed on a first side of the casing in the secondary scan direction, and the aperture mirror is disposed on a second side thereof in the secondary scan direction.

Image sensing apparatus

A phase difference detecting device includes a splitter for splitting laser beams into a first group which will travel along a first path and a second group which will travel along a second path, a beam selection/extraction unit for selecting, as reference light, one beam from the first group to allow it to pass therethrough, a path length changing unit for changing the length of the first path, a combining unit for combining the reference light and beams which construct the second group to produce interference light, and a detector for detecting the intensity of the interference light. The device changes the length of the first path using the path length changing unit to detect a path length which maximizes the intensity of the interference light for each of the beams which construct the second group, and determines a phase difference among the beams from the detected path length.

Laser phase difference detecting device and laser phase control device

An optical system deviation estimating apparatus includes an erected/inverted attitude setting meansfor changing dispositional attitude of an optical system under test, a non-interferometric type wavefront measuring meansfor measuring wavefronts at the attitudes as set up without resorting to interference phenomenon of light, a polynomial approximation meansfor expanding measured wavefront values determined by the non-interferometric type wavefront measuring meansto a polynomial, an averaging arithmetic meansfor averaging the measured values derived from output of the non-interferometric type wavefront measuring meansor alternatively arithmetic values derived from output of the polynomial approximation means, and a polynomial specific coefficient extraction arithmetic meansfor extracting specific coefficient values of the polynomial.

Apparatus and method for estimating and adjusting deviations in an optical system based on wavefront aberrations ascribable to misalignment

High-output transmitters are applied to a power generation satellite and a transmission antenna apparatus and a transmission antenna having an array antenna with a small number of element antennas and a reflecting mirror antenna is applied, thereby providing a power generation satellite and a transmission antenna apparatus in a space photovoltaic generation system comprising transmission antennas each having performance equivalent to that of a phased array antenna with a smaller number of transmitters and a smaller number of element antennas than those of a transmission antenna implemented as a phased array antenna.

Power generation satellite and transmission antenna apparatus

A power generation satellite has a photoelectric conversion unit for converting sunlight into electric energy, a transmission frequency conversion unit for performing frequency conversion of the electric energy to a microwave, a microwave control unit for controlling the amplitude, the phase, or the amplitude and the phase of the microwave, and a transmitting antenna for radiating the microwave. A plurality of the power generation satellites are placed in space to form a power generation satellite group and an array antenna having the transmitting antennas of the power generation satellites in the power generation satellite group as element antennas is formed.

Space photovoltaic power generation system

The rays of light from an object under observation are condensed by objective lens. The incident light from the objective lens is reflected by plane reflector mirror to form a focused image on a detector. The plane reflector mirror floats in at least three reflector mirror floating vessels and even if the telescope tilts, a surface of the fluid in the vessel remains leveled and the plane reflector mirror does not vibrate. Further, the plane reflector mirror includes at least three pads, each of the pads floating in a corresponding reflector mirror floating vessel.

Photographic zenith telescope

A space photovoltaic power generation system including a plurality of power satellites arranged in space, each of which converts electrical energy, into which sunlight has been photoelectric-converted, into a microwave, and transmits the microwave to an electric power base. The space photovoltaic power generation system divides the plurality of power satellites into a number of power satellite groups and adjusts the amount of phase adjustment to be made to a microwave which each of the plurality of power satellites included in each power satellite group will transmit so that a plurality of microwaves from the plurality of power satellites included in each power satellite group are in phase with one another. The beamwidth of the plurality of microwaves can be reduced without increasing the area of the aperture of a transmission antenna of each of the plurality of power satellites. If the plurality of microwaves transmitted from the plurality of power satellites included in each power satellite group interfere with microwaves transmitted from any other power satellite group, the beamwidth is reduced. To avoid the reduction in the beamwidth, each of the plurality of power satellites included in each power satellite group modulates the phase-adjusted microwave so as to generate an incoherent microwave so that the microwave does not interfere with other microwaves transmitted from any other power satellite group.

Space photovoltaic power generation method and system

A space photovoltaic generation system including a plurality of power satellites arranged in space, each of which converts electrical energy, into which sunlight has been photoelectric-converted, into a microwave, and transmits the microwave to an electric power base. The system can thus transmit a microwave of high power to the electric power base. Each of the plurality of power satellites modulates the generated microwave so as to generate an incoherent microwave before transmitting it to the electric power base, thus reducing the power density of the electric power transmitted to the electric power base on the earth and hence a loss in the total amount of energy transmitted to the electrical power base on the earth.

Space photovoltaic power generation system, power satellite, and electric power base

A method of and a system for receiving microwave beams from a plurality of power satellites ( ) in space by way of a receiving antenna ( ). By controlling the directions of a plurality of microwave beams to be transmitted from the plurality of power satellites, the plurality of power satellites ( ) direct the plurality of microwave beams into an aperture surface of the receiving antenna ( ), respectively, so that the plurality of microwave beams can be dispersively received at a number of different positions on the aperture surface of the receiving antenna ( ), so as to level the energy distribution of the microwaves received on the aperture surface of the receiving antenna ( ).

Method of and system for receiving microwave

A space photovoltaic power generation system including a plurality of power satellites arranged in space, each of which converts electrical energy, into which sunlight has been photoelectric-converted, into a microwave, and transmits the microwave to an electric power base. The system can thus transmit a microwave of high power to the electric power base. As each of the plurality of power satellites changes its attitude in space, and its relative location therefore changes, each of the plurality of power satellites can adjust an amount of phase adjustment to be made to the microwave which each of the plurality of power satellites will transmit. A control satellite measures the location of each of the plurality of power satellites for the phase adjustment, and calculates the amount of phase adjustment for each of the plurality of power satellites. The control satellite then transmits the amount of phase adjustment to each of the plurality of power satellites.

Space photovoltaic power generation system, power satellite, and control satellite

A reflector which is formed of three or more of reflector modules (called stacks) arranged in arrays and bonded to each other, the stacks being arranged to average the distribution of thermal deformations thereof in terms of inhomogeneity among the stacks in average coefficient of linear expansion, thereby suppressing deformation and deterioration of image-forming performance quality of the reflector under varying temperature conditions. The stacks are arranged in order of the magnitude of values of average coefficients of linear expansion possessed by said stacks so that a thermal deformation pattern produced is a relatively simple pattern, there is provided a reflector device in which correction of thermal deformation can be made by a few actuators.

Reflector device

Described herein is a reflector which is formed of three or more of reflector modules (called stacks in followings) arranged in arrays and bonded to each other the stacks being arranged to average the distribution of thermal deformations thereof in terms of inhomogeneity among the stacks in average coefficient of linear expansion, thereby suppressing deformation and deterioration of image-forming performance quality of the reflector under varying temperature conditions. Since the stacks are arranged in order of the magnitude of values of average coefficients of linear expansion possessed by said stacks so that a thermal deformation pattern produced is a relatively simple pattern, there is provided a reflector device in which correction of thermal deformation can be made by a few actuators. A reflector device wherein a correcting force is automatically calculated from a difference between a temperature of a reflector and a reference temperature to drive an actuator whereby an excellent image forming performance with respect to the change in temperature can be maintained. A reflector device wherein a surface deformation of a reflector is developed into modes to automatically select modes so that a residual deformation is less a predesignated deformation amount, and after correction thereof, the deformation is corrected whereby the correction can be made efficiently with a small force.

A reflecting mirror, wherein mirror segments are fused together thereby composing the reflecting mirror by formulating square sums of displacements at a plurality of sampling points on a mirror surface of the reflecting mirror as a function of a thermal expansion coefficient vector having components of deviations of thermal expansion coefficients of the respective mirror segments from the average thermal expansion coefficients of all the mirror segments, positions of the components corresponding to arranging positions of the respective mirror segments; generating a stochastic process wherein the smaller the square sum of the displacement of the thermal expansion coefficient vector, the larger the probability whereby the thermal expansion coefficient vector appears, by a computer using random numbers; selecting the thermal expansion coefficient vector minimizing the square sum of the displacement from the appeared thermal expansion coefficient vectors; and arranging and fusing together the mirror segments in accordance with the components thereof.

Fused segment reflecting mirror

A method of fabricating a reflecting mirror, wherein mirror segments are fused together thereby composing the reflecting mirror comprising, formulating square sums of displacements at a plurality of sampling points on a mirror surface of the reflecting mirror as a function of a thermal expansion coefficient-vector having components of deviations of thermal expansion coefficients of the respective mirror segments from the average thermal expansion coefficients of all the mirror segments, positions of the components corresponding to arranging positions of the respective mirror segments; generating a stochastic process wherein the smaller the square sum of the displacement of the thermal expansion coefficient vector, the larger the probability whereby the thermal expansion coefficient vector appears, by a computer using random numbers; selecting the thermal expansion coefficient vector minimizing the square sum of the displacement from the appeared thermal expansion coefficient vectors; and arranging and fusing together the mirror segments in accordance with the components thereof.

Growing community of inventors

Tokyo, Japan

Izumi Mikami