Light source device

• US 3,986,018 A
• Filed: 10/15/1975
• Issued: 10/12/1976
• Est. Priority Date: 10/15/1974
• Status: Expired due to Term

• Current Assignee: Ushio Electric Incorporated
• Original Assignee: Ushio Electric Incorporated
• Inventors: Ishii, Takao
• Primary Examiner(s): Hayes, Monroe H.
• Application Number:
  US05/622,670
• Time in Patent Office: 363 Days
• Field of Search: 240/47, 240/11.4 R, 355/67, 352/202
• US Class Current: 362/218
• CPC Class Codes: F21V 1/08 adjustable
• CPC Class Codes: F21V 29/00 Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems lighting fixtures combined with outlets for air-treatment systems F24F13/078
• CPC Class Codes: F21V 29/503 of light sources cooling arrangements structurally associated with gas-discharge or vapour-discharge lamps H01J61/52; cooling arrangements structurally associated with electric incandescent lamps H01K1/58; cooling arrangements structurally associated with light-emitting diodes H01L33/64
• CPC Class Codes: F21V 29/67 characterised by the arrangement of fans

Abstract

A light source device including an elongated box-shaped house, a gutter-shaped reflex mirror having a slit at its bottom and an elongated tubular light source positioned in the vicinity of said slit to effectively cool the bulb wall portion of said light source on the downstream side of a cooling flow generated by the cooling means disposed on the back wall of said house.

Claims

1. A light source device comprising an elongated box-shaped housing, a cooling means provided on the back wall of said house, a gutter-shaped reflex mirror having a slit at its bottom and a tubular elongated light source arranged within and along the longitudinal direction of said housing, wherein said light source has an electrical input power more than 90 watt per 1 cm of arc and the distance between a slit and a bulb wall portion 3b of said light source on the downstream side of a cooling flow is within one-third of the outer diameter of said light source.

3. A device as claimed in claim 1, wherein said light source is a high pressure mercury-arc lamp.

2. A light source device comprising an elongated box-shaped housing, a cooling means provided on the back wall of said house, a gutter-shaped reflex mirror having a slit at its bottom and a tubular elongated light source arranged within and along the longitudinal direction of said housing, and a wind channel having an opening provided between said slit and said light source, wherein said light source has an electrical input power more than 90 watt per 1 cm of arc and the distance between an opening of said wind channel and a bulb wall portion 3b of said light source on the downstream side of a cooling flow is within one-third of the outer diameter of said light source.

4. A device as claimed in claim 2, wherein said light source is a high pressure mercury-arc lamp.