公开(公告)号：EP1139700A4

公开(公告)日：2002-03-28

申请号：EP00917356

申请日：2000-04-19

Applicant: USHIO ELECTRIC INC

Inventor： OKAMOTO MASASHI ,  YAMAMOTO TOMOHIRO ,  ARIMOTO TOMOYOSHI ,  KONDO YOSHITERU

IPC: G03B21/14 ,  H05B41/282 ,  H05B41/292 ,  H05B41/38

CPC classification number: H05B41/38 ,  H05B41/2928

公开(公告)号：JP2001006895A

公开(公告)日：2001-01-12

申请号：JP2000105274

申请日：2000-04-06

Applicant: USHIO ELECTRIC INC

Inventor： OKAMOTO MASASHI ,  YAMAMOTO TOSHIHIRO ,  ARIMOTO TOMOYOSHI ,  KONDO YOSHITERU

IPC: G03B21/14 ,  H05B41/282 ,  H05B41/292 ,  H05B41/38

Abstract: PROBLEM TO BE SOLVED: To provide a power feeding device for a discharge lamp capable of perfectly preventing the emission failure of the lamp in a high-pressure mercury vapor discharge lamp having a large mercury filling quantity. SOLUTION: In this power feeding device for a discharge lamp for lighting a high-pressure mercury vapor discharge lamp having a large mercury filling quantity, a dummy arc discharge resistor 59 having a resistance nearly equal to the arc discharge resistance of the high-pressure mercury vapor discharge lamp is formed at the output end of the power feeding device 2 for a discharge lamp in a manner capable of changing over its connected state to the combination of dummy glow discharge resistors 59, 60 having a resistance of around 1/7 as much as glow discharge resistance. The device has such a characteristic that a continuation period in which a dummy glow discharge current in a transient state in changing over to the dummy glow discharge resistors from the state that the dummy arc discharge current is flowing by connecting the dummy arc discharge resistor to the power feeding device for the discharge lamp is equal to or less than 30% of the dummy arc discharge current is 10 μs or less, and a period until it returns to at least 70% of the dummy arc discharge current is 100 μs or less.

公开(公告)号：JP2000208100A

公开(公告)日：2000-07-28

申请号：JP458699

申请日：1999-01-11

Applicant: USHIO ELECTRIC INC

Inventor： NARITA MITSUO ,  KONDO YOSHITERU

IPC: H01J61/073 ,  H01J61/20 ,  H01J61/54

Abstract: PROBLEM TO BE SOLVED: To provide a high-pressure mercury lamp improved in lighting start and a light source device using it. SOLUTION: In a structure wherein a pair of tungsten electrodes 4, 5 are arranged oppositely to each other at a distance =0.1 mg/mm3 is enclosed in the discharge container 2, energy fed to a high-pressure mercury lamp 1 in a period of 0-50 μsec after the pair of tungsten electrodes 4, 5 cause dielectric breakdown is 1×10-3-2×10-2J.

公开(公告)号：JP2001176302A

公开(公告)日：2001-06-29

申请号：JP35676099

申请日：1999-12-16

Applicant: USHIO ELECTRIC INC

Inventor： TOMINAGA KENJI ,  KONDO YOSHITERU

IPC: H01J61/00 ,  F21S2/00 ,  F21V3/04 ,  F21V7/22 ,  F21V13/00 ,  F21V25/12 ,  F21Y101/00 ,  G03B21/14 ,  H01J61/02

Abstract: PROBLEM TO BE SOLVED: To provide an optical apparatus that prevents the flying of a fallen piece of a transmittant glass plate covering a concave reflector encircling a discharge lamp and an opening in the front thereof even in the case of a rupture of a short-arc-type high-pressure discharge lamp turned ON at a very high mercury vapor pressure. SOLUTION: A flying-preventing membrane 40 of polymeric material, for example, fluorocarbon resin, is applied to the external surface of a concave reflector 20 made of glass encircling a high-pressure discharge lamp 10 with 0.16 g/mm3 of mercury in a discharge container. Also, the flying-preventing membrane is applied to the external surface of the part of the concave reflector that receives direct light in the range of within ±40 degrees to a direction orthogonal to the axis line of the high pressure mercury discharge lamp. The flying-preventing membrane is allied to the periphery of a transmittant glass plate 30.

公开(公告)号：JPH1167154A

公开(公告)日：1999-03-09

申请号：JP22702797

申请日：1997-08-11

Applicant: USHIO ELECTRIC INC

Inventor： OYAMA MASAMITSU ,  KONDO YOSHITERU ,  KAMAYA YOSHIHARU ,  ARIMOTO TOMOYOSHI ,  GOTO KAZUHIRO

IPC: H01J61/86 ,  H01J61/36

Abstract: PROBLEM TO BE SOLVED: To provide an extra-high pressure discharge lamp in which mercury vapor pressure is extremely high and which has sufficient durability. SOLUTION: This lamp consists of a swelling luminous space part 20 and slender sealing parts 21a, 21b extending from its both ends respectively. In the swelling luminous space part 20, a pair of electrodes 3a, 3b facing each other with an interval of not more than 2.5 mm are arranged, also mercury, the vapor pressure of which becomes not less than 80 atmospheres when lighted, is filled and the slender sealing part 21 on the side of the swelling luminous space part 20 is made larger than the other parts.

公开(公告)号：JPH11111226A

公开(公告)日：1999-04-23

申请号：JP28122497

申请日：1997-09-30

Applicant: USHIO ELECTRIC INC

Inventor： OYAMA MASAMITSU ,  KONDO YOSHITERU ,  KAMAYA YOSHIHARU ,  ARIMOTO TOMOYOSHI ,  GOTO KAZUHIRO

IPC: H01J61/86 ,  H01J61/36

Abstract: PROBLEM TO BE SOLVED: To provide a short arc type extra-high pressure discharge lamp which has extremely high mercury vapor pressure when lighted and has sufficient pressure resistance. SOLUTION: This short arc type extra-high pressure discharge lamp is composed of an luminescent space expanding part 20 and a long and narrow sealing parts 21 (21a, 21b) extending respectively toward its both ends. A pair of facing electrodes 3 (3a, 3b) are arranged at tan interval of 2.5 mm or less at the illuminating space expanding part 20, and mercury is sealed in to be 80 atm or more when lighting. Metallic leaves 4 (4a, 4b) that an end part of the luminescent space side is a curbed shape are in planted inside the long and narrow sealing parts 21 (21a, 21b).

公开(公告)号：JPH1166927A

公开(公告)日：1999-03-09

申请号：JP26519497

申请日：1997-08-22

Applicant: USHIO ELECTRIC INC

Inventor： OYAMA MASAMITSU ,  KONDO YOSHITERU ,  KAMAYA YOSHIHARU ,  ARIMOTO TOMOYOSHI ,  GOTO KAZUHIRO

IPC: F21V7/04 ,  H01J61/86

Abstract: PROBLEM TO BE SOLVED: To provide a direct current lighting type short arc ultra-high voltage discharge lamp having a reflecting mirror capable of lowering a temperature of a light emitting tube that causes losing of transparency, at the same time preventing a temperature fall of the lower part of the light emitting tube, and obtaining a high operational pressure. SOLUTION: This lamp comprises a direct current lighting type short arc ultra-high voltage discharge lamp 1 in which a pair of electrodes are disposed in opposite with an interval of 2.5 mm or less, and a mercury steam pressure during lighting is at 80 atm or more and a non-magnetic recessed-face reflection mirror 2 surrounding this discharge lamp 1 and having a front face cover 3. In this case, with an axis of the discharge lamp 1 and an optical axis of the recessed-face reflection mirror 3 being substantially matched with each other, one sealing part of the lamp 1 is mounted to a center bottom of the recessed-face reflection mirror 2, and the other sealing part extends toward an opening side on which the front face cover 3 of the recessed-face reflection mirror 2 is present. A pair of permanent magnets 31 and 32 are arranged on the outside surface or outside vicinity of the recessed-face reflection mirror 2 so that a pair of N and S poles respectively are opposite to each other, and a straight line connecting these permanent magnets to each other is perpendicular to an optical axis of the discharge lamp 1.