Abstract: Provided is a tungsten electrode material that can improve the life of an electrode than conventional by the use of a material in place of thorium oxide. The tungsten electrode material includes a tungsten base alloy and oxide particles dispersed in the tungsten base alloy, wherein the oxide particle is an oxide solid solution in which a Zr oxide and/or a Hf oxide and an oxide of at least one or more kinds of rare earth elements selected from Sc, Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu are solid-dissolved.

Abstract: In a liquid-filled anti-vibration mounting device suitable such as for an engine mount, an accommodation room containing a rubber movable plate is formed inside a partition member partitioning a liquid chamber into a pressure receiving chamber and a balancing chamber. The partition member includes a pair of division walls, one adjoining the pressure receiving chamber and the other adjoining the balancing chamber. Each division wall is formed with a plurality of communication holes. The communication holes are arranged to undulate at least a portion of the movable plate towards the peripheral edge thereof at specified circumferential intervals or greater by the action of the liquid pressure through the communication holes. The movable plate thus deformed, particularly its portion towards the peripheral edge, has a small area to come into contact with the division walls at a time, which effectively disperses and lessens a shock due to contact.

Abstract: A connector assembly has a first connector, a second connector matable with the first connector along a mating direction, a mating assistance mechanism, a mating maintenance mechanism, and a detection mechanism. The mating assistance mechanism has an operation member and is operable to mate the second connector with the first connector in accordance with an operation of the operation member. The mating maintenance mechanism includes a stopper, an engagement portion and an elastic support. The engagement portion is configured to be engaged with the stopper in a mating state of the first connector and the second connector so as to maintain the mating state. The elastic support is configured to support the engagement portion. The elastic support is elastically deformed and moves the engagement portion along a direction different from the mating direction when the second connector is mated with the first connector.

Abstract: A light-absorbing member has a substrate (101, 111) made of a material capable of absorbing light of which reflection is to be prevented, and an antireflection structure (102, 112, 303) having structural elements arranged on the surface of the curve in an array form at a period smaller than the wavelength of the light. The substrate having the shape of a curve viewed from a macroscopic viewpoint. The structural elements have a shape protruding or being recessed from a reference face corresponding to the curve of the substrate, and are arranged so that the straight lines connecting the reference face to the tips of the respective structural elements are nearly parallel to one another.

Abstract: A reflection of unnecessary light, which should be prevented, can be suppressed, and occurrence of stray light can be reduced using a member having an antireflection structure, comprising a plate-like portion 2, and an aperture portion 3 formed in the plate-like portion 2, wherein the antireflection structure having an aspect ratio of 1 or more and comprising structural elements arranged in an array form at a period smaller than the shortest wavelength of light, the reflection of which should be prevented, is formed on an inner wall 4 of the aperture portion 3.

Abstract: An antireflection structure that can be formed in a desired shape, and a method for manufacturing the same are provided. An antireflection structure 100 includes a resin layer 200 formed in a desired shape, and inorganic material fine particles 201 dispersed inside the resin layer. A plurality of fine concaves 202 having an average inner diameter shorter than or equal to the minimum wavelength of light whose reflection should be suppressed are formed at the surface of the antireflection structure 100, thereby reducing the equivalent refractive index at the surface of the resin layer 200. The fine concaves 202 are formed by, after forming a composite material in which the nanosized inorganic material fine particles 201 are dispersed in the resin layer, dissolving the inorganic material fine particles 201 dispersed at the surface of the resin layer 200, using a solvent that dissolves only the inorganic material fine particles 201.

Abstract: A body motion detection section (2) for continuously detecting the frequency of a user's activity as an activity level is provided. The activity level detected by the body motion detection section (2) is outputted to a fatigue detection section (3) for estimating a user's fatigue level on the basis of the activity level.

Abstract: An imaging optical system according to the present invention is provided with at least one lens element and comprises: an optical surface through which incident light transmits; and an antireflection structure provided in at least part of a peripheral region located in the periphery of a center region containing the center of an optical surface in one or more optical surfaces, wherein the peripheral region is within an optical effective diameter, and wherein the antireflection structure is a structure in which structural units having a predetermined shape are arranged periodically in the form of an array at a period smaller than a minimum wavelength of light whose reflection should be prevented in the incident light.

Abstract: A forming member for antireflection structure according to the present invention comprises a transfer material and a to-be-transferred material, wherein: the transfer material can be peeled off from the to-be-transferred material; the transfer material is constructed such that a structure having a reversal shape of an antireflection structure in which structural units are arranged in a shape of an array at a period smaller than a minimum wavelength of light whose reflection should be prevented and which has an aspect ratio of unity or greater is formed on a principal surface of a base substrate part having flexibility; the to-be-transferred material is a structure formed from a resin and having the same shape as the antireflection structure; and the transfer material and the to-be-transferred material are arranged such that the structure having the same shape as the antireflection structure fills up the structure having a reversal shape of the antireflection structure.

Abstract: An illumination optical system includes a light source for emitting a plurality of different colors of light, a plurality of rotating optical scanners, and a plurality of scanning lenses. Each of the optical scanners has a reflecting surface that is formed helically around a cylindrical body. The different colors of light enter the respective reflecting surfaces in the direction parallel to the rotation axis, are reflected therefrom, and pass through the scanning lenses, so that each color of light is magnified and then scans the region to be illuminated sequentially. This makes it possible to provide an illumination optical system that can improve scanning linearity, lower noise because of its reduced wind resistance, and achieve reduction in the cost and power consumption.

Abstract: In a liquid-filled anti-vibration mounting device suitable such as for an engine mount, an accommodation room containing a rubber movable plate is formed inside a partition member partitioning a liquid chamber into a pressure receiving chamber and a balancing chamber. The partition member includes a pair of division walls, one adjoining the pressure receiving chamber and the other adjoining the balancing chamber. Each division wall is formed with a plurality of communication holes. The communication holes are arranged to undulate at least a portion of the movable plate towards the peripheral edge thereof at specified circumferential intervals or greater by the action of the liquid pressure through the communication holes. The movable plate thus deformed, particularly its portion towards the peripheral edge, has a small area to come into contact with the division walls at a time, which effectively disperses and lessens a shock due to contact.

Abstract: A light quantity distribution control element includes a substrate of 20 mm×20 mm×3 mm made of a material that transmits light, such as optical glass or acryl, and a antireflective structure provided on a surface of the substrate. As the antireflective structure, a conical antireflective structure of a pitch of 0.15 ?m (periodic structure having conical convexities) is formed. This corresponds to a antireflective structure having a pitch of a wavelength or less in the ultraviolet band (150 nm to 400 nm) at the time when ultraviolet light is used as incident light.

Abstract: In a lens barrel for holding an imaging optical system that forms an optical image of an object, the imaging optical system comprises an object side lens unit 4 onto which light ray from the object is incident and a reflective optical element 5 having a reflecting surface 5a for bending the light ray exiting from the object side lens unit 4, and in an imaging state, the object side lens unit 4 is held in a manner movable in a direction of the light ray from the object, and while in an accommodated state, the reflective optical element 5 is escaped to an escape position different from a position located in the imaging state.

Abstract: A wide-angle imaging optical system includes a refractive optical system (3), a reflective optical system, and an image-forming optical system (5). The reflective optical system includes a first reflection surface (1) that directly reflects rays of light from an object, and a second reflection surface (2) that reflects rays of light from the first reflection surface (1). An open portion is provided between the first reflection surface (1) and the second reflection surface (2), and rays of light from the object enter the open portion. A light-transmitting portion (2a) is provided in the second reflection surface (2) and transmits rays of light that have entered the refractive optical system (3). An aperture (1a) is provided in the first reflection surface (1) and allows rays of light from the second reflection surface (2) and the refractive optical system (3) to enter the image-forming optical system (5).

Abstract: It is intended to provide for a polycistronic expression pattern in a plant used as a host. The present invention provides a polynucleotide which comprises the following DNA (a) or (b) and functions as IRES (internal ribosome entry site) in a plant: (a) DNA of the nucleotide sequence represented by SEQ ID NO: 1, 2, 3, or 4; or (b) DNA of a nucleotide sequence derived from the nucleotide sequence represented by SEQ ID NO: 1, 2, 3, or 4 by the substitution, deletion, addition, and insertion of one or more bases and having a function of positively regulating the translation of a gene located downstream along the translation direction in the plant.

Abstract: The present invention includes three or more lens groups. These are arranged in the order of a first lens group (11) that has positive refractive power and a second lens group (12) that has negative refractive power, as seen from the side having the longer conjugate distance, wherein a first lens (12a) of the lenses of the second lens group (12), as seen from the side having the longer conjugate distance, has positive refractive power. Thus, it is possible to suppress distortion aberration to a small value.

Abstract: A light quantity distribution control element includes a substrate of 20 mm×20 mm×3 mm made of a material that transmits light, such as optical glass or acryl, and a antireflective structure provided on a surface of the substrate. As the antireflective structure, a conical antireflective structure of a pitch of 0.15 ?m (periodic structure having conical convexities) is formed. This corresponds to a antireflective structure having a pitch of a wavelength or less in the ultraviolet band (150 nm to 400 nm) at the time when ultraviolet light is used as incident light.

Abstract: A low-cost contact detection sensor and contact detection method for easily detecting a contact by a third party is provided. A contact detection sensor comprises an antireflection structure including structure elements having a predetermined shape which are put in an array periodically at a pitch smaller than a wavelength of visible spectrum; and a substrate including the antireflection structure in at least a part of a surface portion thereof. The antireflection structure distinguishes whether the detection target is contacted by a human body or not based on a change in reflectance which occurs to an area of the detection target contacted by the human body when the detection target is contacted by the human body.

Abstract: A light-absorbing member has a substrate (101, 111) made of a material capable of absorbing light of which reflection is to be prevented, and an antireflection structure (102, 112, 303) having structural elements arranged on the surface of the curve in an array form at a period smaller than the wavelength of the light. The substrate having the shape of a curve viewed from a macroscopic viewpoint. The structural elements have a shape protruding or being recessed from a reference face corresponding to the curve of the substrate, and are arranged so that the straight lines connecting the reference face to the tips of the respective structural elements are nearly parallel to one another.

Abstract: A distance-measuring optical apparatus for measuring a distance to an object as a target comprises an imaging optical system; an image sensor; a driving section for moving at least the imaging optical system substantially perpendicular to an optical axis; an image sensor control section for outputting a periodical timing signal for designating a timing at which the image sensor takes an object image; and a driving control section for controlling the driving section to reciprocate the imaging optical system. The timing signal is periodically output when the imaging optical system is located near two positions away from each other in a direction substantially perpendicular to the optical axis. The distance-measuring optical apparatus further comprises an image processing operation section for finding, through an operation, a distance from the imaging optical system to the object using the image signal when the imaging optical system is at each of the two positions.