Abstract: An optical film according to an embodiment includes a substrate 101, a surface member 102 provided on a front surface of the substrate 101, and an optical functional layer 103 provided on a back surface of the substrate 101. The optical functional layer 103 includes a low-refractive index layer 104 and a high-refractive index layer 105, and an interface between the low-refractive index layer 104 and the high-refractive index layer 105 has a recessed/protruding shape. The refractive index of the high-refractive index layer 105, the refractive index of the substrate 101, and the refractive index of the surface member 102 become smaller in this order.

Abstract: An object is to provide a daylighting sheet which efficiently performs daylighting and in which, when the daylighting sheet is applied to a window of a building or the like, it is possible to see an outdoor side. The daylighting sheet includes a translucent base material layer; and a light deflection layer that is formed on the base material layer, and the light deflection layer includes: light transmission portions that are aligned along one surface of the base material layer so as to be able to transmit light, each of which including a groove at a portion being in a light entering side in a position where the light transmission portion is arranged in the opening portion of a building; and light deflection portions that are formed between the light transmission portions and filled with a material whose refractive index is lower than that of the light transmission portions.

Abstract: A semi-transmissive reflection sheet is provided, including a first optical shape layer including unit optical shapes, and a second optical shape layer laminated on the first optical shape layer from a side of a surface formed by the unit optical shapes. The unit optical shape has a first surface that is inclined with respect to a light emergent side surface of the second optical shape layer. The light emergent side surface is opposed to the first optical shape layer. The unit optical shape also has a second surface that is not parallel to the light emergent side surface. A reflection layer that reflects at least a part of image light traveling in the semi-transmissive reflection sheet is provided on the first surface.

Abstract: An object is to provide a daylighting sheet which efficiently performs daylighting and in which, when the daylighting sheet is applied to a window of a building or the like, it is possible to see an outdoor side. The daylighting sheet includes a translucent base material layer; and a light deflection layer that is formed on the base material layer, and the light deflection layer includes: light transmission portions that are aligned along one surface of the base material layer so as to be able to transmit light, each of which including a groove at a portion being in a light entering side in a position where the light transmission portion is arranged in the opening portion of a building; and light deflection portions that are formed between the light transmission portions and filled with a material whose refractive index is lower than that of the light transmission portions.

Abstract: An object is to provide a daylighting sheet which efficiently performs daylighting and in which, when the daylighting sheet is applied to a window of a building or the like, it is possible to see an outdoor side. The daylighting sheet includes a translucent base material layer; and a light deflection layer that is formed on the base material layer, and the light deflection layer includes: light transmission portions that are aligned along one surface of the base material layer so as to be able to transmit light, each of the light transmission portions including a portion that is convex upwards; and light deflection portions that are formed between the light transmission portions and filled with a material whose refractive index is lower than that of the light transmission portions.

Abstract: A semi-transmissive reflection sheet (20) includes: a first optical shape layer (22) including unit optical shapes (30); and a second optical shape layer (23) laminated on the first optical shape layer from a side of a surface formed by the unit optical shapes. The unit optical shape has: a first surface (30a) that is inclined with respect to a light emergent side surface (23b) of the second optical shape layer, the light emergent side surface being opposed to the first optical shape layer; and a second surface (30b) that is not parallel to the light emergent side surface. A reflection layer (25) that reflects at least a part of image light traveling in the semi-transmissive reflection sheet is provided on the first surface.

Abstract: An object is to provide a daylighting sheet which efficiently performs daylighting and in which, when the daylighting sheet is applied to a window of a building or the like, it is possible to see an outdoor side. The daylighting sheet includes a translucent base material layer; and a light deflection layer that is formed on the base material layer, and the light deflection layer includes: light transmission portions that are aligned along one surface of the base material layer so as to be able to transmit light, each of the light transmission portions including a portion that is convex upwards; and light deflection portions that are formed between the light transmission portions and filled with a material whose refractive index is lower than that of the light transmission port ions.

Abstract: An object is to provide a daylighting sheet which efficiently performs daylighting and in which, when the daylighting sheet is applied to a window of a building or the like, it is possible to see an outdoor side. The daylighting sheet includes a translucent base material layer; and a light deflection layer that is formed on the base material layer, and the light deflection layer includes: light transmission portions that are aligned along one surface of the base material layer so as to be able to transmit light, each of the light transmission portions including a portion that is convex upwards; and light deflection portions that are formed between the light transmission portions and filled with a material whose refractive index is lower than that of the light transmission portions.

Abstract: An object is to provide a daylighting sheet which efficiently performs daylighting and in which, when the daylighting sheet is applied to a window of a building or the like, it is possible to see an outdoor side. The daylighting sheet includes a translucent base material layer; and a light deflection layer that is formed on the base material layer, and the light deflection layer includes: light transmission portions that are aligned along one surface of the base material layer so as to be able to transmit light, each of the light transmission portions including a portion that is convex upwards; and light deflection portions that are formed between the light transmission portions and filled with a material whose refractive index is lower than that of the light transmission portions.

Abstract: A daylighting sheet is provided which efficiently performs daylighting and in which, when the daylighting sheet is applied to an opening portion, such as a window of a building, it is possible to see an outdoor side from an indoor side. The daylighting sheet is formed by stacking a plurality of layers, the layers include: a translucent base material layer; and a light deflection layer that is formed on the base material layer, and the light deflection layer includes: light transmission portions that are aligned along one surface of the base material layer so as to be able to transmit light; and light deflection portions that are formed between the light transmission portions and deflect the light reaching the light deflection portions.

Abstract: A reflection screen includes: a reflection layer provided on the back side and adapted to reflect light; and a surface shape layer provided on the reflection layer, at the image source side relative to the reflection screen, the surface shape layer having a plurality of unit optical shapes arrayed and deflecting image light toward the reflection layer side. The unit optical shape satisfies, in a section along the array direction of the unit optical shapes and orthogonal to a screen plane, the relationship of ?+2???>90°, where ? is an angle that a total reflection surface makes with a plane parallel to the screen plane, ? is an angle that an incidence surface makes with a normal direction to the screen plane, and ? is an angle that light incident on the incidence surface makes with the normal direction to the screen plane.

Abstract: A reflection screen includes: a reflection layer provided on the back side and adapted to reflect light; and a surface shape layer provided on the reflection layer, at the image source side relative to the reflection screen, the surface shape layer having a plurality of unit optical shapes arrayed and deflecting image light toward the reflection layer side. The unit optical shape satisfies, in a section along the array direction of the unit optical shapes and orthogonal to a screen plane, the relationship of ?+2???>90°, where ? is an angle that a total reflection surface makes with a plane parallel to the screen plane, ? is an angle that an incidence surface makes with a normal direction to the screen plane, and ? is an angle that light incident on the incidence surface makes with the normal direction to the screen plane.

Abstract: A reflection screen includes: a reflection layer provided on the back side and adapted to reflect light; and a surface shape layer provided on the reflection layer, at the image source side relative to the reflection screen, the surface shape layer having a plurality of unit optical shapes arrayed and deflecting image light toward the reflection layer side. The unit optical shape satisfies, in a section along the array direction of the unit optical shapes and orthogonal to a screen plane, the relationship of ?+2???>90°, where ? is an angle that a total reflection surface makes with a plane parallel to the screen plane, ? is an angle that an incidence surface makes with a normal direction to the screen plane, and ? is an angle that light incident on the incidence surface makes with the normal direction to the screen plane.

Abstract: A daylighting sheet is provided which efficiently performs daylighting and in which, when the daylighting sheet is applied to an opening portion, such as a window of a building, it is possible to see an outdoor side from an indoor side. The daylighting sheet is formed by stacking a plurality of layers, the layers include: a translucent base material layer; and a light deflection layer that is formed on the base material layer, and the light deflection layer includes: light transmission portions that are aligned along one surface of the base material layer so as to be able to transmit light; and light deflection portions that are formed between the light transmission portions and deflect the light reaching the light deflection portions.

Abstract: A reflection screen includes: a reflection layer provided on the back side and adapted to reflect light; and a surface shape layer provided on the reflection layer, at the image source side relative to the reflection screen, the surface shape layer having a plurality of unit optical shapes arrayed and deflecting image light toward the reflection layer side. The unit optical shape satisfies, in a section along the array direction of the unit optical shapes and orthogonal to a screen plane, the relationship of ?+2???>90°, where ? is an angle that a total reflection surface makes with a plane parallel to the screen plane, ? is an angle that an incidence surface makes with a normal direction to the screen plane, and ? is an angle that light incident on the incidence surface makes with the normal direction to the screen plane.

Abstract: There is provided a screen that, as a screen suitable for an interactive board, can output video image light incident obliquely from the back surface side to a viewer side to display a reflection-free image and, at the same time, can realize easy handwriting on the screen surface on the viewer side. To this end, a transmission screen for an interactive board is provided that comprises at least a Fresnel lens sheet comprising a prism part on its incident light side, a light diffusing member provided on the Fresnel lens on its surface side remote from the prism part, and a hard coat layer provided on the outgoing light side of the light diffusing member.

Abstract: There is provided a screen that, as a screen suitable for an interactive board, can output video image light incident obliquely from the back surface side to a viewer side to display a reflection-free image and, at the same time, can realize easy handwriting on the screen surface on the viewer side. To this end, a transmission screen for an interactive board is provided that comprises at least a Fresnel lens sheet comprising a prism part on its incident light side, a light diffusing member provided on the Fresnel lens on its surface side remote from the prism part, and a hard coat layer provided on the outgoing light side of the light diffusing member.

Abstract: In the field of dental care, diagnoses have been and being made by means of X-ray images, visual observation, explorer, palpation, fluorometery, insertion of a pocket probe and observation, observation by means of a root canal meter and the use of a Doppler flood flowmeter. However, such diagnoses are invasive and not very clear and three-dimensional X-ray CT apparatus that are being used for diagnoses are very large and complex. Additionally, OCT apparatus for obtaining optical tomographys by using reflection light that are being used by ophthalmologists give rise to problems because of the profile of the detection probe and operability when such an apparatus is used in an oral cavity that contains hard tissues such as teeth and soft tissues such as gingiva for dental care. The present invention dissolves the above identified problems and provides a non-invasive and high resolution dental optical diagnostic apparatus.

Abstract: The present invention provides a process for producing DHA (docosahexaenoic acid)-containing tofu or soybean milk drink, or a dry powder thereof which does not influence taste even if a DHA-containing fish oil is incorporated at a high concentration, which is stable and of which starting materials are inexpensive. A DHA-containing fish oil emulsion is prepared by mixing soybean milk with a DHA-containing fish oil at a weight ratio of 1:0.2 to 1, and stirring the mixture. Then, soybean milk drink can be produced by further diluting this emulsion with soybean milk to give a predetermined DHA concentration. Still further, DHA-containing tofu can be produced by coagulating the soybean milk containing this emulsion with the addition of a coagulant. Since the same soybean milk as the starting material of tofu or soybean milk drink is used as an emulsifying agent, such a product is obtained that even if DHA is contained at a high concentration, this does not influence a taste or properties of the product.

Abstract: Disclosed is a fiber of an organic, inorganic or metallic material or a simple substance wherein ultrafines of an inorganic or metallic material or a simple substance having an average particle diameter of 0.005-1 .mu.m are uniformly dispersed and deposited on 8-90% of the surface in a single layer. The fiber is produced by exposing a fiber of an organic, inorganic or metallic material or a simple substance to a gaseous stream forming ultrafines of an inorganic or metallic material or a simple substance by a vapor phase process, thereby contacting said ultrafines in the gaseous stream with said fiber in a state wherein the ultrafines are still active. The treated fiber is useful as a reinforcing material for a fiber reinforced composite.