Hamamatsu-photonics K.k.

Shunsuke Kobayashi

Ginji Sugiura

Yasumasa Matsuoka

Suenori Kimura

Atsuhito Fukasawa

Yasuyuki Egawa

Rina Konno

Junichi Kondo

Takayasu Nagasawa

The electron tube includes a vacuum container having a light transmitting substrate, a photocathode provided on an inner surface of the light transmitting substrate, an anode provided in the vacuum container, and a prism. The prism includes a bottom surface bonded to an outer surface of the light transmitting substrate, a light incident surface, and a light reflecting surface configured to further reflect light, which is incident to the photocathode through the prism and the light transmitting substrate and reflected at an interface between the photocathode and the vacuum space, so that the light is re-enter the photocathode. The light reflecting surface has an outwardly convex curved surface shape. The light incident surface is located inward of an imaginary spherical surface that is along the light reflecting surface.

Electron tube, electron tube module, and optical device

An electron tube includes a photoelectric conversion unit, an electron detection unit configured to receive a photoelectrons from the photoelectric conversion unit, a gate electrode disposed between the photoelectric conversion unit and the electron detection unit, and a housing configured to accommodate the photoelectric conversion unit, the electron detection unit, and the gate electrode. The housing has a lid portion to which the photoelectric conversion unit is fixed and which constitutes one end side of the housing. The gate electrode includes a main body portion that control passage of the photoelectrons by applying a voltage, and a power supply part that supports the main body portion so as to be spaced apart from the photoelectric conversion unit and applies a voltage to the main body portion. The power supply part is held by the lid portion.

Electron tube

An electron tube module includes an electron tube and a casing. The electron tube includes a vacuum container with a light transmitting substrate, a photocathode provided in an inner surface of the light transmitting substrate, an anode, and a prism. The prism includes a first surface bonded to an outer surface of the light transmitting substrate, a second surface inclined with respect to the first surface, and a third surface which further reflects light incident to the photocathode through the prism and the light transmitting substrate and reflected at an interface between the photocathode and a vacuum space so that the light is incident to the photocathode again. The casing includes a ceiling wall provided with an opening. The second surface is parallel to the ceiling wall. At least a part of the second surface is exposed to outside through the opening.

Electron tube module and optical device

Growing community of inventors

Hamamatsu, Japan

Shunsuke Kobayashi