Enplas Corporation

Takayoshi Suganuma

Shimpei Morioka

Takayuki Arai

Hiroshi Takatori

A communication module including a primary radiator for transmitting an electromagnetic flux, and an electromagnetic flux controlling member for controlling a travelling direction of the electromagnetic flux sent from the primary radiator. The electromagnetic flux controlling member includes an incidence surface and an emission surface. The incidence surface and the emission surface are configured such that the electromagnetic flux emitted is expanded than the electromagnetic flux transmitted from a focal position of a reference lens optimized to collimate the electromagnetic flux from the primary radiator and emitted after incidence on the reference lens on a basis of an emission angle of the electromagnetic flux emitted from the primary radiator, a dielectric constant of the electromagnetic flux controlling member, and an arbitrarily set focal length of the electromagnetic flux controlling member.

Communication module and electromagnetic flux controlling member used for the same

An electromagnetic flux controlling member includes an incidence surface for allowing incidence of an electromagnetic wave, and an emission surface for emitting the electromagnetic wave incident on the incidence surface to an outside. At least one of the incidence surface and the emission surface includes a base curved surface and a plurality of protrusions arranged on the base curved surface. Each of the plurality of protrusions includes a conical tip portion disposed such that at least a part of an edge of a bottom surface of the conical tip portion makes contact with the base curved surface, and a partially columnar leg portion disposed between the conical tip portion and the base curved surface. A central axis of the conical tip portion and a central axis of the partially columnar leg portion are parallel to a main axis of the electromagnetic flux controlling member.

Electromagnetic flux controlling member

A polarizer according to the present invention includes a thin film with a constant thickness composed of a dielectric, and a plurality of slit-shaped through-holes each having the same width formed in the thin film and extending in a first direction. The plurality of through-holes are arranged on a surface of the thin film at a constant interval in a second direction perpendicular to the first direction.

Polarizer and optical element having polarizer

Provided is a light-guiding substrate that can propagate light, which has been emitted by means of a light emitting device, in a confined state with an efficiency as high as possible. An optical system provided with the light-guiding substrate is also provided. The light-guiding substrate () generates 0-order light and +&#x2212; first-order light by diffracting, by means of a first sub wavelength diffracting grating (), light which has been inputted from the light emitting device () via a collimation lens (), generates +&#x2212; first-order light by reflecting/refracting, by means of a second sub wavelength diffracting grating (), the 0-order light that has passed through the first sub wavelength diffracting grating (), and propagates the +&#x2212; first-order light, which has been generated by means of the first sub wavelength diffracting grating (); and the second sub wavelength diffracting grating (), in the direction that orthogonally intersects the thickness direction, while totally reflecting the light by means of both the surfaces () of the substrate main body () in the thickness direction.

Light-guiding substrate and optical system provided with same

A light guide panelhaving a reflective sub-wavelength diffraction gratinggenerates zero-order light and minus first-order light in the reflective sub-wavelength diffraction grating, extracts the minus first-order light as outgoing light, and transmits the zero-order light to generate new minus first-order light by satisfying the conditional expressions:sin(1/)&#x3c;&#x3b8;&#x2003;&#x2003;(1)&#x3bb;/{(sin &#x3b8;+1)}&#x2266;&#x39b;&#x3c;min[2&#x3bb;/{(sin &#x3b8;+1)},&#x3bb;/{(&#x2212;sin &#x3b8;+1)}]&#x2003;&#x2003;(2)sin{sin &#x3b8;&#x2212;&#x3bb;/(&#xb7;&#x39b;)}&#x3c;sin(1/)&#x2003;&#x2003;(3)where,

Light guide panel and optical system including the same

Disclosed is an optical apparatus that allows a target pattern to be imaged adequately at low cost and allows the apparatus to be miniaturized. With this optical apparatus (), light L output from one light source () is collimated through a collimation lens () and divided into first light beams Land Lby a diffractive optical element (), and, by a computer-generated hologram (), first light beams Land Lare each divided into second light beams L, L, Land L, and these second light beams L, L, Land Lform a guide pattern whereby whether or not a focused state is achieved cane be decided.

Optical apparatus

A polarizer includes including a translucent substrate a diffraction grating which is formed on the translucent substrate and which has a plurality of convex portions that are aligned so as to have a frequency which is equal to or less than a wavelength of light to be used, and in which each of the plurality of convex portions includes an alternating layer formed of high-refractive-index layers and low-refractive-index layers, and an intermediate-refractive-index region which is formed at a position between the convex portions that are adjacent to each other in the diffraction grating, so as to have a portion buried in the translucent substrate and which has a refractive index which is higher than a refractive index of the low-refractive-index layer and which is lower than a refractive index of the high-refractive-index layer.

Polarizer and manufacturing method thereof

The object of the present invention is to provide an excellent-quality polarization phase difference plate that enables, by a simple structure: decrease in light loss and in oscillation of the intensity of the transmitting emission light through effectively suppressing Fresnel reflection in the polarization phase difference plate; improvements in the optical property, cut in the cost; and decrease in the manufacture inferior. In the polarization phase difference plate, cross-sectional shape of the convex part is formed in a taper shape from the bottom part thereof towards the top part; a flat part is formed at least between the convex parts being adjacent to each other; and the period of the diffraction grating is formed in a size that is equal to or smaller than the wavelength of light to be used.

Polarization phase difference plate

There are provided a thin wire grid polarizer having a high transmittance, a high quenching ratio and a high degree of polarization, and a method for producing the same at low costs. A fluoridated polyimide thin film, a hydrophilic thin filmand a hydrophobic thin filmare sequentially stacked on a glass substrateto be pressed by a diefrom the side of the hydrophobic thin filmto transfer the fine pattern of groove forming protrusionsof the dieto the hydrophobic thin filmand hydrophilic thin filmby the nano-imprinted lithography technique, and then, metal fine wires are caused to grow by plating.

Wire grid polarizer and method for producing same

An object is to provide a wire grid polarizer with an excellent optical property, which enables to maintain the polarization extinction ratio high and level in the broadband wavelength region with a simple structure. A wire grid polarizer of the present invention comprises, a wire grid structural body in which a plurality of metal wires are formed and arranged at a certain period in a direction orthogonal to a longitudinal direction of the metal wires on a light-transmitting substrate, for transmitting only a specific linearly polarized light out of linearly polarized lights being orthogonal to each other, which make incident to the wire grid structural body, wherein a cross-sectional shape of the metal wire, which is orthogonal to the longitudinal direction, has a taper shape.

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Kawaguchi, Japan

Takayoshi Suganuma