公开(公告)号：JPH02159272A

公开(公告)日：1990-06-19

申请号：JP31596888

申请日：1988-12-14

Applicant: HAMAMATSU PHOTONICS KK

Inventor： ISHIDA NOBORU ,  NATSUME YOSHIO ,  TAMAKI TATSUJIRO ,  MAKINO KOJI

IPC: G02C7/10 ,  A61F9/06

Abstract: PURPOSE:To obtain protective glasses free from erroneous operation by equipping the glasses with an ultraviolet ray detection means for detecting ultraviolet rays having a predetermined wavelength or less to output the detection result and a light shield means for limiting the incidence of light to the eye of a wearer according to the output from the ultraviolet detection means. CONSTITUTION:Protective glasses 1 are constituted of a liquid crystal type light shield part 2 and an ultraviolet detection part 3 and ultraviolet detection elements 3a, 3b are provided to the ultraviolet detection part 3 and emit signals, for example, when light having a wavelength of 270nm or more is incident in predetermined quantity or more. Further, a filter 3c for shielding a part of light is provided to the front surface of the element 3b. When welding work is carried out, the ultraviolet detection elements 3a, 3b detect ultraviolet rays to generate detection signals and the application of voltage to liquid crystal films 2a, 2b is eliminated and the protective glasses 1 become the most light-impermeable state and an eye is not damaged. When ultraviolet rays generated from other worker are incident to an eye and the protective glasses 1 become a light shielding state, a pitch-dark dangerous state is developed. In this case, the ultraviolet rays incident to the ultraviolet detection element 3b are attenuated by the filter 3c and the element 3b detects no ultraviolet rays and ultraviolet rays are attenuated to a degree imparting no damage to an eye.

公开(公告)号：JPH04218249A

公开(公告)日：1992-08-07

申请号：JP40224690

申请日：1990-12-14

Applicant: HAMAMATSU PHOTONICS KK

Inventor： OBA AKIRA ,  SUGIYAMA MASARU ,  OSUGA SHINJI ,  YOKOYAMA TOSHIKI ,  ISHIDA NOBORU ,  NAKANO TOMOYASU

IPC: H01J35/22

Abstract: PURPOSE:To provide a plasma X ray generator capable of illuminating a microscopic area effectively in the present invention. CONSTITUTION:A high speed gas valve 23 controls injection of gas into a plasma generating chamber 2 in a vacuum vessel. An anode 21 and a cathode 22 cause the gas injected into the plasma generating chamber 2 to discharge so as to transform it into plasma. A slantingly incidence reflecting mirror 41 arranged in the vacuum vessel condenses an X ray image in a part 25 of the gas which is transformed into the plasma on a microscopic spot outside of the vacuum vessel. In an illustrated plasma X ray generator, since X ray is condensed on the microscopic spot outside of the vacuum vessel, by means of a simple X ray radiation source, a prescribed spot outside of the vacuum vessel can be illuminated locally and effectively.

公开(公告)号：JPH01117253A

公开(公告)日：1989-05-10

申请号：JP27554687

申请日：1987-10-30

Applicant: HAMAMATSU PHOTONICS KK

Inventor： NAKANO TOMOYASU ,  TAMAKI TATSUJIRO ,  ISHIDA NOBORU

IPC: H05G2/00 ,  H01J35/22 ,  H05G1/00

Abstract: PURPOSE:To make the accurate open/close control of a gas open/close valve for the ON-OFF control of gas supply to a plasma generation chamber by using a piezoelectric ceramic element as the constituent thereof. CONSTITUTION:A piezoelectric ceramic valve 33 is positionally adjusted with a valve position adjustment micrometer 34 so that a plasma generation chamber will be vacuum, when the valve 33 is closed. Also, the valve 33 is applied with voltage from a power supply 39 and a piezoelectric ceramic element 35 is in an elongated state. On the other hand, when the applied voltage is made zero for the predetermined time, the element 35 contracts and lifts a movable valve 36, thereby opening the valve 33 and introducing the predetermined amount of gases in the plasma generation chamber 11. In order to cope therewith, high voltage is applied from a high voltage power supply 17, an X-ray 21 is generated from a plasma and this X-ray 21 can be taken out via a window 22. By using the piezoelectric ceramic valve 33 as aforementioned, the accurate open/close thereof can be made and a stable X-ray becomes available.

公开(公告)号：JPS6293850A

公开(公告)日：1987-04-30

申请号：JP23274485

申请日：1985-10-18

Applicant: HAMAMATSU PHOTONICS KK

Inventor： GOTO SHIGEO ,  ISHIDA NOBORU

IPC: H01J61/10 ,  H01J61/30

Abstract: PURPOSE:To obtain a discharge tube where the light emitting area can be reduced by constructing such that the base section side of a glass tube forming a transparent container of the discharge tube is separated by a barrier wall while a cathode and an anode are provided at respective separated base section sides and the space between the endface of the glass tube and the tip of the barrier wall will provide main discharge path. CONSTITUTION:The top face 1b section of a glass container 1 is semi-spherical and a glass barrier wall 1a is provided at the base section side of the glass container 1. The bottom face 1c of the glass container 1 is supporting the cathode pin 4 and a pin 5 for forming an anode. Each pin 4, 5 is made of copal. A cathode 4a of sintered tungsten column is welded to the tip section of the cathode pin 4. Nesa film (conductive film of tin oxide) 2 is formed on the surface of the glass container 1 except the bottom face 1c while a trigger electrode 3 is wound over the sideface near the bottom face 1c of the glass container 1 and connected electrically to the NESA film 2. Xe gas is filled in the glass container 1.