Luminescent concentrator light source

• US 4,935,632 A
• Filed: 11/15/1988
• Issued: 06/19/1990
• Est. Priority Date: 09/23/1985
• Status: Expired due to Fees

• Current Assignee: Landus Incorporated
• Original Assignee: Landus Incorporated
• Inventors: Hart, Douglas
• Primary Examiner(s): Hannaher, Constantine
• Application Number:
  US07/271,436
• Time in Patent Office: 581 Days
• Field of Search: 250/486.1, 250/483.1, 250/487.1, 250/462.1, 250/493.1, 250/503.1, 250/494.1, 313/54
• US Class Current: 250/486.1
• CPC Class Codes: F21K 99/00 Subject matter not provided for in other groups of this subclass
• CPC Class Codes: G21H 3/02 in which material is excited to luminesce by the radiation lamps in which a gas filling or screen or coating is excited to luminesce by radioactive material structurally associated with the lamp H01J65/00
• CPC Class Codes: H01J 65/08 Lamps in which a screen or coating is excited to luminesce by radioactive material located inside the vessel direct conversion of radiation energy from radioactive sources into light G21H3/02

Abstract

A light assembly comprises a self-luminescent light source, a wave guide and output optics. The self-luminescent light source takes the form of a luminescent concentrator which is activated by beta radiation from tritium which is immobilized in a matrix in which a luminescent material is distributed.

Claims

1. A luminescent concentrator light source, comprising:

a matrix material,

tritium immobilized to a carrier therefor and being distributed in said matrix material,

a luminescent material activatable to generate electromagnetic radiation by beta radiation produced by said tritium and being distributed in said matrix material by being dissolved therein or immobilized to a carrier therefor, and

an outer surface to said matrix material formed of a material which enhances internal reflection of electromagnetic radiation produced by said luminescent material.

2. The light source of claim 1, wherein said matrix material is a solid polymeric material.

3. The light source of claim 2, wherein said tritium is immobilized to a carrier therefor by chemically-binding said tritium to said polymeric material.

4. The light source of claim 3, in the form of an elongate cylindrical structure.

5. The light source of claim 4 wherein said elongate cylindrical structure comprises an optical fibre material.

6. The light source of claim 1, wherein said matrix material is a liquid material which is contained within a solid surrounding material.

7. The light source of claim 6, wherein said tritium is immobilized to a carrier therefor by chemically-binding said tritium to said liquid material.

8. The light source of claim 1 wherein said outer surface of said matrix material is formed of a material having a refractive index different from that of the remainder of the matrix material.

9. The light source of claim 1 wherein said outer surface of said matrix material bears a silver coating to effect such reflection.

10. The light source of claim 1 wherein said matrix material is a polymeric material and constitutes said carrier for said luminescent material, which is chemically bound thereto.

11. The light source of claim 10 wherein said polymer is a solid polymeric material or a liquid polymeric material which is contained within a solid surrounding material.

12. The light source of claim 1, in combination with:

light guide means for guiding light from said source to a remote location, and

light emitter means at said remote location for emitting light received from said light source through said guide means.

13. The combination of claim 12 including means for selectively preventing light from passing from said source to said emitter means, wherein light emission from said light source is turned on and off.

14. A luminescent concentrator light source, comprising:

a matrix material which is a transparent solid polymeric material,

tritium chemically bound to said matrix material,

a luminescent material activatable to generate electromagnetic radiation by beta radiation produced by said tritium and chemically bound to said matrix material, whereby said tritium and said luminescent material are distributed in said matrix material and are molecularly intermixed, and

an outer surface of said matrix material formed of a material which enhances internal reflection of electromagnetic radiation produced by said luminescent material.