Abstract: The present invention uniforms a size of an LED substrate 2 to realize reduction of the number of parts and reduction of a manufacturing cost, and is a light irradiation device comprising: a long LED substrate 2 on which a plurality of same LEDs 21 are mounted; a chassis 3 having a substrate housing space for housing the LED substrate 2, wherein the number of LEDs 21 in which a difference between a power source voltage VE and a sum of a forward voltage Vf in the series connection of the LEDs 21 is within an allowable range is employed as the number of LED units, and the number of LEDs 21 mounted on the LED substrate 2 is a common multiple of the number of LED units determined in each of LEDs 21 of different wavelengths.

Abstract: In order to provide an LED light emitting device that can easily control a color temperature of white light, the LED light emitting device is provided with a plurality of types of light emitting parts that: respectively have LED elements that emit ultraviolet radiation or violet color visible light, and phosphors that absorb the ultraviolet radiation or violet color visible light to emit colored light; and emit the colored light, wherein: the colored light emitted by the plurality of types of light emitting parts become white light when all mixed with each other; the LED elements of the plurality of types of light emitting parts are all the same ones, and mounted on a single base material; and two or more light emitting parts overlap with each other in their parts.

Abstract: The light irradiation device is provided that can reduce moire interference with a simple and low-cost arrangement without sacrificing a compact design by comprising a transparent plate 31 which has a predetermined thickness and one of whose surfaces is arranged as an object facing surface 31a to face an object W such as a product on which light is to be irradiated, multiple reflecting sections 32 that are laid out on other surface of the transparent plate 31 with forming a microscopic space S therebetween with its light reflecting surface facing a direction of the object W, a light source section 5 arranged at a position where at least a part of the emitted light is transmitted, reaches the light reflecting surface, is reflected on the light reflecting surface and is emitted from the object facing surface 31a, and an antireflection film 33 that covers the object facing surface 31a.

Abstract: The invention provides a light irradiation apparatus that can adjust widening/narrowing of a light irradiation area and can guide almost whole of light emitted from an LED to the light irradiation area. The apparatus has an LED 11 and an optical unit 2 for making light for the LED 11 pass through itself and emit from its apical surface 21, and is equipped further with a supporting body 1A for holding the LED on the apical surface and a position adjustment mechanism for adjusting a relative position of the optical unit 2 to the LED 11 along an optical axis C direction.

Abstract: An optical unit is provided with an integral light condensing section and a light transmitting section. The light condensing section is in a shape of a parabolic body of rotation substantially widening from a proximal end toward a distal end with a concave section opening at a proximal end face to accommodate a light emitting element, a side circumferential face to reflect the light from the light emitting element inward and a distal end face to introduce the light from the light emitting element into the light transmitting section. The light transmitting section is a substantially cylindrical shape of a smaller diameter than the light condensing section, and comprises a proximal end face to introduce the light from the light condensing section, a side circumferential face to reflect the light introduced from the proximal end face inward and a distal end face to emit the light.

Abstract: A light emitting diode unit comprises a light emitting element D1, a base 1 having a heat dissipating member 12 that dissipates heat generated by the light emitting element D1, and a first lens 2 comprising a reflecting element 214 that reflects light R2 traveling outside of a predetermined angle among the emitted light R emitted by the light emitting element D1 and a refracting element F that refracts light R1 traveling inside of the predetermined angle among the emitted light R each of which is formed integrally, with the first lens 2 mounted integrally on the base 1, and the emitted light R emitted from the light emitting element D1 is made to travel generally toward the same direction by the reflecting element 214 and the refracting element F.

Abstract: A lighting device is provided that surface-emits the light evenly with less number of luminous bodies by comprising a transparent body 2 for light diffusion in a shape of a body of rotation having a center bore 11 and provided with a luminous surface 2c and a light introducing surface 2b, and multiple luminous bodies 3 that introduce the light into the light introducing surface 2c of the transparent body 2 and make the luminous surface 2c of the transparent body 2 surface-emit the light, wherein the light introducing surface 2b is arranged on an inner peripheral section forming the center bore 11 of the transparent body 2, a reflecting layer 41 is arranged to reflect the light on a surface other than the light introducing surface 2b and the luminous surface 2c of the transparent body 2, and the light from the luminous bodies 3 is emitted toward an outer surrounding surface 2e of the transparent body 2.

Abstract: In order to provide a line light irradiation device that can improve efficiency of condensing light with a compact size and that is almost free from unevenness of lighting, the line light irradiation device of the present claimed invention comprises multiple light emitting parts 2 each of which is provided with a light irradiating part 21 where multiple optical fibers 4 are thickly arranged in a line with light leading out end portions 4a of the multiple optical fibers 4 forming a straight line and a columnar lens 22 arranged to extend along a direction of the line P in front of the light irradiating part 21 in pairs, and that irradiate line light LL that converges into a straight line, and a holding body 3 that is arranged to face to a work W as being an object on which the line light LL is to be irradiated, on which monitoring bores 3a, 3b are arranged to penetrate in order to monitor the work W, and that holds the light emitting parts 2 so that each optical axis face of the line light LL irradiated from ea

Abstract: A light emitting diode unit comprises a light emitting element D1, a base 1 having a heat dissipating member 12 that dissipates heat generated by the light emitting element D1, and a first lens 2 comprising a reflecting element 214 that reflects light R2 traveling outside of a predetermined angle among the emitted light R emitted by the light emitting element D1 and a refracting element F that refracts light R1 traveling inside of the predetermined angle among the emitted light R, each of which is formed integrally, with the first lens 2 mounted integrally on the base 1, and the emitted light R emitted from the light emitting element D1 is made to travel generally toward the same direction by the reflecting element 214 and the refracting element F.

Abstract: An improved illuminating unit for illuminating a target portion of an object to be illuminated is provided, including: a fiber holding portion having a fiber insert hole holding a light-emitting end portion of an optical fiber; and a lens holding portion located downstream of the fiber holding portion in a light traveling direction, light emitted from a light-emitting end of the optical fiber being directed to the target portion through a lens held by the lens holding portion, wherein: the fiber insert hole comprises an equal-diameter portion having a diameter substantially equal to a diameter of the optical fiber, and a larger-diameter portion having a larger diameter than the equal-diameter portion and opening at one end face of the fiber holding portion, the fiber insert hole holding the optical fiber extending through the equal-diameter portion; and the lens is abutted against the one end face of the fiber holding portion or a forward end face of a fusion-deformed portion of the optical fiber, the fusion-

Abstract: An improved optical fiber holder is provided, including: a tubular member (3) for fitting over an optical fiber bundle (1) consisting of a bundle of plural optical fibers (11) to prevent the optical fibers (11) from separating from each other; and a pressing structure (5) for exerting a pressing force on the optical fiber bundle (1) in a direction perpendicular to a longitudinal direction of the optical fiber bundle (1) to press the optical fiber bundle (1) against an inner periphery (3a) of the tubular member (3).

Abstract: An efficient lighting unit with improvements in ease of moving its head, reliability and the like is provided. The lighting unit includes: heads 6A and 6B defining illuminating apertures 6Aa and 6Ba, respectively, for directing light to an object W to be illuminated, the heads 6A and 6B being supported by a movable support member 1; LED light source devices 5A and 5B mounted at the movable support member 1 for emitting light when supplied with electric power from an electric power source 3 disposed separately from the movable support member 1 through an electric cable 4; and flexible optical fibers 7A and 7B for guiding light from the LED light source devices 5A and 5B to the respective illuminating apertures 6Aa and 6Ba of the heads 6A and 6B.

Abstract: A light irradiating unit comprises an LED 5 and a housing 2 into which the LED 5 is incorporated and that has a heat dissipating portion wherein the housing 2 has a first housing element 21 and a second housing element 22 each of which is joined serially along a predetermined axial line, and further comprises a pressing arrangement 3 that fixes the LED 5 with pressure between a first pressing face 3b arranged at the first housing element 21 side and a second pressing face 3a arranged at the second housing element 22 side accompanied by joining the first and the second housing elements 21, 22 and a positioning arrangement 4 that positions the LED 5 so as to align an optical axis of the LED 5 with the predetermined axial line accompanied by joining the first and the second housing elements 21, 22.

Abstract: An electric power supply system is provided to recognize a type or a desired operating condition of a connected LED lighting unit automatically and to supply electric power corresponding to the type or the operating condition.

Abstract: A light irradiating unit is provided which is easy to manufacture with a large light production that is stable in luminous intensity and superior in life duration. The light irradiating unit comprises an illuminant loading member that has a curved illuminant loading face on which a plurality of illuminants are loaded, a holding frame that holds the illuminant loading member and a tabular heat-dissipating member that has predetermined elasticity and/or flexibility. The heat-dissipating member is attached to a back face of the illuminant loading member and a supporting face of the holding frame that faces to the back face of the illuminant loading face respectively by making use of its elasticity and/or flexibility.

Abstract: On the light radiation device X6A side, a box structure is provided in which a lens is held one by one proximate to or close to the light emission end of each optical fiber. On the light source device side, a common casing houses a first light source lens that generally collimates the radiation light beams radiated from an LED and a second light source lens that condenses the light beams from the first light source lens and introduces the condensed light beams to the light introduction end of the optical fiber bundle. Thus, the current demands of tests on a piece of work can be fully satisfied in view of the light condensing area and the light condensing efficiency while making the best of the characteristics of the illumination system in which the light radiation device and the light source device are separated with an intervention of the optical fibers.

Abstract: A cost effective and small illuminating apparatus for testing includes an illuminant having a predetermined illumination angle, a first lens for converging light from the illuminant and converting the light into collimated light, and a second lens for converging light which has passed through through-holes formed in a tested target after having been emitted from the first lens as the collimated light and for making an imager take in the light.