Hamamatsu-photonics K.k.

Hamamatsu Protonics K.k.

Ryotaro Matui

Yoshinobu Ito

Tomoyuki Ikedo

Kyoichi Murayama

Kouzou Adachi

Hiroya Kashiwabara

Keita Umeno

Yoshiteru Miyamoto

Hideaki Yokoyama

Yasumasa Hakamata

Koji Maejima

A light emitting device includes a housing; a light source unit; and a cooling unit provided in the housing to discharge heat to an outside of the housing by means of a gas, the heat being generated by the light source unit. The cooling unit includes an introduction portion, a heat exchange portion, and a circulation portion that guides the gas from the introduction portion to the heat exchange portion. The circulation portion includes a first flow path receiving the gas from the introduction portion, and a second flow path receiving the gas from the first flow path, and being connected to the heat exchange portion. The first flow path includes a portion having a flow path area larger than a flow path area of the introduction portion.

Light emitting device

An active energy radiation unit includes a light source which radiates ultraviolet rays onto a target object, and a main gas supply mechanism which is disposed to be adjacent to the light source and ejects an inert gas. The main gas supply mechanism includes a receiving part which receives nitrogen gas, a first ejection port which is provided at a position between the receiving part and the light source in a transfer direction and closer to the target object than the receiving part and a second ejection port which is provided between the receiving part and the first ejection port in the transfer direction.

Active energy radiation unit and active energy radiation device

A light source device includes a casing including one end surface, other end surface, and one side surface between the one end surface and the other end surface, a light emitting unit provided on a side of the one end surface in the casing, a heat radiating unit provided in the casing and thermally connected to the light emitting unit, an exhaust port formed at least in a region located in one side surface and facing the heat radiating unit, an axial fan which is provided in the casing and supplies cooling air to the heat radiating unit, and a shielding deflecting plate which is provided between the axial fan and the heat radiating unit and shields a part of the cooling air supplied from the axial fan and deflects a part of the cooling air to a direction away from the exhaust port.

Light source device

An active energy radiation unit includes a light source which radiates ultraviolet rays onto a target object, and a main gas supply mechanism which is disposed to be adjacent to the light source and ejects an inert gas. The main gas supply mechanism includes a receiving part which receives the inert gas, and a main ejection port which is provided at a position between the receiving part and the light source and closer to the target object than the receiving part. A flow path area from the receiving part to the main ejection port is constant.

An air filter includes a first urethane portion made of polyurethane foam and having air permeability and a second urethane portion made of polyurethane foam and disposed so as to overlap with a part of the first urethane portion. The second urethane portion is higher in density than the first urethane portion. The first urethane portion and the second urethane portion are integrated with each other in a state where the second urethane portion is incorporated in the part of the first urethane portion.

Air filter, light source device, and air filter manufacturing method

A light source device includes a housing having a great length along a predetermined direction, a plurality of light emitting elements which are placed in the housing and are arranged along the predetermined direction, and one or more heat dissipation members which are placed in the housing and are thermally connected with the light emitting elements. A first intake port through which air is sucked into the housing is provided in one end in the housing. An exhaust port through which air is discharged to an outside is provided in the other end in the housing. A space where the other side in the predetermined direction faces the heat dissipation member is formed in the housing. A second intake port through which air is sucked into the space from the outside is provided in a side surface between the first intake port and the exhaust port in the housing.

An LED light source device capable of making the amount of light of an emitting region a predetermined amount of light or more and uniformizing the amount of light is provided. The LED light source deviceincludes an ultraviolet LED arrayincluding an LED juxtaposition region R in which LEDsthat emit ultraviolet light toward the front are juxtaposed, and a light transmitting memberprovided on the front side of the LED juxtaposition region R of the ultraviolet LED arrayso as to be opposed thereto, showing a rectangular parallelepiped outer shape, and formed of a material containing quartz. At a front surfaceof the LED, an emitting surface S surrounded by a marginal portionof a predetermined width H and for emitting the ultraviolet light is provided. Here, when viewed from the front, an end of the light transmitting memberis located between inside by &#xbd; of the predetermined width H and outside by &#xbd; of the predetermined width H with respect to an end of the LED juxtaposition region R of the ultraviolet LED array

LED light source device

A light source apparatus having a housing including a mercury xenon lamp, a reflecting mirror, and a gas-blasting structureincluding a plurality of spray ports for blasting an inert gas onto a reflecting surface of the reflecting mirror. The gas-blasting structure is positioned around an exit aperture of the reflecting mirror, and includes a supply port for receiving the inert gas from the outside. The spray ports are arranged to be off a line along a direction of the gas introduced through the supply port.

Light source apparatus with reflector gas-blasting structure

A flange portion is integrally formed with a stem which forms a sealing envelope for a gas discharge tube. Accordingly, operation for building and fixing the flange portion is not necessary, so that lamp assembly operation is simplified, and mass production is facilitated. In addition, when a gas discharge tube is to be fixed to an external stem setting portion, lamp setting is enabled at higher precision by utilizing positioning holes formed in the flange portion in advance.

Gas discharge tube

In a gas discharge tube in which a sealed envelope at least a part of which transmits light is filled with a gas, and electric discharge is generated between anode and cathode sections disposed within the sealed envelope, so as to emit predetermined light outside from the light-transmitting part of the sealed envelope, the anode section is mounted on an insulating anode support member, an insulating electrode support member having an opening for exposing the anode section is mounted on a surface surrounding the anode section, a focusing electrode having a focusing opening projecting toward the anode section is further mounted at the front face of the opening, and the cathode section is disposed on the anode support member or focusing electrode support member so as to be spaced from the focusing opening.

Gas discharge tube having precise electrode arrangement

In the gas discharge tube of the present invention, for elongating the life of the discharge tube itself while lowering the assembling temperature, a side tube itself is formed from glass, and a metal is employed in a joint between a stem and the side tube. Namely, a metal-made first peripheral portion provided in the stem and a metal-made second peripheral portion provided in the side tube are utilized in the joint. As a result, the discharge tube itself can be made smaller.

In a gas discharge tube in accordance with the present invention, a side tube is formed from a metal, the outer periphery of the stem is provided with a joint portion made of a metal, and the latter is joined to a metal-made joint portion of the side tube by welding, whereby the assembling is made easier by welding, while the gas discharge tube itself can attain smaller dimensions. Also, since the side tube is small and made of a metal, its handling improves greatly. Further, since side tube is formed from a metal, the gas discharge tube is encouraged to have a wider range of processed forms and attains a prospect for mass production.

Gas discharge tube having sealed envelope with metallic portion and light projection glass window

While high heat is generated in the anode section in the gas discharge tube in accordance with the present invention during its use, the heat is transmitted to the stem by way of the anode support plate due to a configuration in which the anode support plate abuts against the stem, and is released outside from the stem, whereby the cooling efficiency of the anode section is improved. Since the anode section employs not a floating structure including stem pins interposed therein but a configuration in which it is seated on the stem by way of the anode support plate, the anode section is stabilized on the stem, whereby the resistance to vibration improves. Also, for assembling the anode section into a sealed envelope, it will be sufficient if the anode support plate is mounted on the stem, which contributes to improving the easiness in assembling the gas discharge tube.

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Hamamatsu, Japan

Ryotaro Matui