Abstract: To exhibit high strength, achieve a high shielding effect, and increase reliability with a compact and low profile. A first connector that mates with a second connector, containing: a first connector main body; a first terminal attached to the first connector main body; a first high-frequency terminal attached to the first connector main body; and a first shield surrounding an entire circumference of the first connector main body; and further containing, a first inner side shield attached to the first connector main body and extending in a width direction of the first connector between the first terminal and the first high-frequency terminal; where a substrate connecting part of the first terminal is visible from a mating surface side of the first connector, and a substrate connecting part of the first inner side shield is not visible from the mating surface side.

Abstract: A configuration ensuring a connector to be fixed to a connector housing with high water-tightness, free of damaging or breaking due to external force, and achieving high shielding performance and reliability is provided. The connector includes a terminal that is conductive, an intermediate insulating member that contains the terminal, and an outer conductor that is conductive and contains the intermediate insulating member. The connector housing includes an outer conductor holding part provided with an outer conductor insertion hole through which the outer conductor is inserted and a front outer conductor containing cavity that is formed on a front side of the outer conductor holding part and has a larger cross-sectional area than the outer conductor insertion hole.

Abstract: A diffusion element is configured by combining: a structure for diffusion constituted by combining periodic surface structures having multiple periods to achieve a light intensity distribution in which the light intensity is uniform at angles less than or equal to a predetermined diffusion angle ? and the light intensity is as close as possible to zero intensity at angles greater than the diffusion angle ?; and a diffractive structure having a period of 1 or more and 2 or less times of ?max, where ?max is the maximum period of the structure for diffusion.

Abstract: A diffuser provided with plural shapes obtained by translation on an xy plane of at least one of z=g(x, y) and z=?g(x, y), z=g(x, y) being a smooth function within a rectangle having sides of length of s in x direction and sides of length of t in y direction, the origin being the center of the rectangle, wherein on the sides of the rectangle, g ? ( x , y ) = 0 , ? ? g ? ( x , y ) ? x = 0 , ? ? g ? ( x , y ) ? y = 0 , ? ? 2 ? g ? ( x , y ) ? x 2 = 0 , and ? 2 ? g ? ( x , y ) ? y 2 = 0 , and wherein z=g(x, y) has a single vertex at (xv,yv) g(x,y)=h1(x)·h2(y), first derivative of z=h1(x) is continuous in ( - s 2 , s 2 ) , second derivative of z=h1(x) has a single point of discontinuity in ( - s 2 , x v ) and ? ( x v , s 2 ) , first derivative of z=h2(y) is continuous in ( - t 2 , t 2 ) , and second derivative of z=h2(y) has a single

Abstract: A diffusion element is configured by combining: a structure for diffusion constituted by combining periodic surface structures having multiple periods to achieve a light intensity distribution in which the light intensity is uniform at angles less than or equal to a predetermined diffusion angle ? and the light intensity is as close as possible to zero intensity at angles greater than the diffusion angle ?; and a diffractive structure having a period of 1 or more and 2 or less times of ?max, where ?max is the maximum period of the structure for diffusion.

Abstract: A configuration ensuring a connector to be fixed to a connector housing with high water-tightness, free of damaging or breaking due to external force, and achieving high shielding performance and reliability is provided. The connector includes a terminal that is conductive, an intermediate insulating member that contains the terminal, and an outer conductor that is conductive and contains the intermediate insulating member. The connector housing includes an outer conductor holding part provided with an outer conductor insertion hole through which the outer conductor is inserted and a front outer conductor containing cavity that is formed on a front side of the outer conductor holding part and has a larger cross-sectional area than the outer conductor insertion hole.

Abstract: A diffuser provided with plural shapes obtained by translation on an xy plane of at least one of z=g(x, y) and z=?g(x, y), z=g(x, y) being a smooth function within a rectangle having sides of length of s in x direction and sides of length of t in y direction, the origin being the center of the rectangle, wherein on the sides of the rectangle, g ? ( x , y ) = 0 , ? ? g ? ( x , y ) ? x = 0 , ? ? g ? ( x , y ) ? y = 0 , ? ? 2 ? g ? ( x , y ) ? x 2 = 0 , and ? 2 ? g ? ( x , y ) ? y 2 = 0 , and wherein z=g(x, y) has a single vertex at (xv,yv) g(x,y)=h1(x)·h2(y), first derivative of z=h1(x) is continuous in ( - s 2 , s 2 ) , second derivative of z=h1(x) has a single point of discontinuity in ( - s 2 , x v ) and ? ( x v , s 2 ) , first derivative of z=h2(y) is continuous in ( - t 2 , t 2 ) , and second derivative of z=h2(y) has a sin

Abstract: A microlens array includes N microlenses arranged in a predetermined direction on an x-y plane. A projection onto the x-y plane of the vertex of each microlens is arranged in the vicinity of a lattice point of a reference lattice on the x-y plane, the lattice spacing of the reference lattice in the predetermined direction being D/M (millimeters) where M is a positive integer. A distance between two sides of a lens facing each other is approximately equal to D, and a distance between the projection onto the x-y plane of the vertex of the lens and the projection onto the x-y plane of a side of the lens is D/2+?i. Letting n represent the refractive index of the material of each microlens and letting f (millimeters) represent the focal length of each microlens, the following relationships are satisfied. 0.0042 D < D 2 ? ? f = D ? ( n - 1 ) 2 ? ? R 0.0048 ? f ? { 1 + ( D / 2 ? ? f ) 2 } < ? < 0.

Abstract: A diffractive optical element according to the present invention forms a predetermined image with a parallel light beam at a predetermined angle of incidence and that has a grating having plural values of grating period. In the diffractive optical element, at least one of height of the grating and a ratio of grating groove width to grating period is changed as a function of grating period such that zeroth order efficiency is reduced.

Abstract: A microlens array includes N microlenses arranged in a predetermined direction on an x-y plane. A projection onto the x-y plane of the vertex of each microlens is arranged in the vicinity of a lattice point of a reference lattice on the x-y plane, the lattice spacing of the reference lattice in the predetermined direction being D/M (millimeters) where M is a positive integer. A distance between two sides of a lens facing each other is approximately equal to D, and a distance between the projection onto the x-y plane of the vertex of the lens and the projection onto the x-y plane of a side of the lens is D/2+?i. Letting n represent the refractive index of the material of each microlens and letting f (millimeters) represent the focal length of each microlens, the following relationships are satisfied. 0.0042 D < D 2 ? ? f = D ? ( n - 1 ) 2 ? ? R 0.0048 ? f ? { 1 + ( D / 2 ? ? f ) 2 } < ? < 0.

Abstract: Provided is a portable electronic device with excellent shock resistance without reducing design property. A portable electronic device according to an exemplary embodiment of the present invention is equipped with a case including a device (e.g., a speaker), a covering member that covers the device, a protrusion that is formed on the case, and a protective member that protects the covering member. The protective member is formed to protrude from the covering member and also with a substantially equivalent height to that of the protrusion. It is preferable that the protrusion is formed at facing edges of the case, and the protective member is formed between the protrusion.

Abstract: An edge connector is disclosed, having a configuration in which board contacting portions of terminals coming into contact with both ends of the board are displaced, an overall spring portion of each terminal applying an biasing force to the board contacting portions are displaced, and the surface of a cover member displacing the spring portion is configured as a sloped surface. Due to this configuration, it is possible to apply a stable biasing force to the board contacting portion without plastically deforming the terminals and to bring the board contacting portion of the terminal into secure contact with the board even when the thickness of the board varies greatly.

Abstract: Provided is a portable electronic device with excellent shock resistance without reducing design property. A portable electronic device according to an exemplary embodiment of the present invention is equipped with a case including a device (e.g., a speaker), a covering member that covers the device, a protrusion that is formed on the case, and a protective member that protects the covering member. The protective member is formed to protrude from the covering member and also with a substantially equivalent height to that of the protrusion. It is preferable that the protrusion is formed at facing edges of the case, and the protective member is formed between the protrusion.

Abstract: A terahertz electromagnetic wave generating element can include a generation layer, and a plurality of pairs of layer structures provided on opposite sides thereof. The layer structures are each provided with a first layer, a second layer on the side of the first layer opposite to the generation layer, and a first grating and a second grating, and having a grating period smaller than the wavelength of the terahertz electromagnetic wave to be used. The first and second gratings are configured so that the refractive index of a medium between the first layer and the second layer continuously varies between a first refractive index and a second refractive index. The thickness of the first and second layers and the grating period, and the grating height are determined so that a terahertz electromagnetic wave having a desired bandwidth with respect to a central wavelength of the terahertz electromagnetic wave generated by the generation layer can be generated.

Abstract: An edge connector is disclosed, having a configuration in which board contacting portions of terminals coming into contact with both ends of the board are displaced, an overall spring portion of each terminal applying an biasing force to the board contacting portions are displaced, and the surface of a cover member displacing the spring portion is configured as a sloped surface. Due to this configuration, it is possible to apply a stable biasing force to the board contacting portion without plastically deforming the terminals and to bring the board contacting portion of the terminal into secure contact with the board even when the thickness of the board varies greatly.

Abstract: A terahertz electromagnetic wave generating element can include a generation layer, and a plurality of pairs of layer structures provided on opposite sides thereof. The layer structures are each provided with a first layer, a second layer on the side of the first layer opposite to the generation layer, and a first grating and a second grating, and having a grating period smaller than the wavelength of the terahertz electromagnetic wave to be used. The first and second gratings are configured so that the refractive index of a medium between the first layer and the second layer continuously varies between a first refractive index and a second refractive index. The thickness of the first and second layers and the grating period, and the grating height are determined so that a terahertz electromagnetic wave having a desired bandwidth with respect to a central wavelength of the terahertz electromagnetic wave generated by the generation layer can be generated.

Abstract: A wavelength filter, includes a grating in which a first portion extends in X direction on a substrate surface and a second portion extends in the X direction along the first portion and are alternately arranged in Y direction perpendicular to the X direction on the substrate surface at a constant cycle shorter than a wavelength of light to be used. A cross-sectional figure of respective first portions in the Y direction and perpendicular to the substrate surface is provided with at least one protruding portion so as to have the width in the Y direction wider than neighboring portions. Plural waveguide layers parallel to the substrate surface are divided by regions parallel to the substrate surface. Wavelength bands of light reflected from the plural waveguide layers shift while overlapping with each other to reflect a wavelength band broader than that reflected from a single waveguide layer.

Abstract: A wavelength filter, which has a simple structure with a small number of types of thin films and a small number of laminations, is produced by a simple process, has few variations of performance and has a broad wavelength band, is provided. The wavelength filter is composed of a grating in which a first portion (103) extending in X direction on a substrate surface and a second portion (105) extending in the X direction along the first portion are alternately arranged in Y direction perpendicular to the X direction on the substrate surface at a constant cycle shorter than the wavelength of light to be used. The cross-sectional figure of respective first portions in the Y direction and perpendicular to the substrate surface is provided with at least one protruding portion (107) so as to have the width in the Y direction wider than that of neighboring portions.

Abstract: A socket for a pin grid-array package includes a base housing having terminals arranged in the same grid pattern as the lead pins of the pin grid-array package, an overlying slide cover having through holes arranged in the same grid pattern for accommodating the lead pins, and a slide drive for driving the overlying slide cover on the underlying base housing. The base housing is designed so that terminals may be press-fit in their terminal-receiving cavities from above the upper side of the base housing until their tails to appear from the bottom of the base housing.

Abstract: A flexible printed circuitry member includes a generally planar dielectric substrate. First and second pseudo-twisted conductors are disposed on opposite sides of the substrate and extend longitudinally in a pattern of twist sections between crossover points whereat the conductors cross over each other separated by the dielectric substrate. The crossover points define a centerline with the first and second conductors reversing each other on opposite sides of the centerline at each crossover point. The twist sections between crossover points along the centerline are of randomly differing lengths.