Medical Headlamp Optical Arrangement

• US 20140334159A1
• Filed: 08/21/2013
• Published: 11/13/2014
• Est. Priority Date: 05/13/2013
• Status: Active Grant

• Current Assignee: Riverpoint Medical Llc
• Original Assignee: River Point, LLC (Hines Interests LP)
• Inventors: Ferguson, John Thomas
• Granted Patent: US 9,687,314 B2
• Time in Patent Office: Days
• US Class Current: 362/311.02
• CPC Class Codes: A61B 1/0692 head mounted
• CPC Class Codes: A61B 2090/309 using white LEDs
• CPC Class Codes: A61B 2090/502 Headgear, e.g. helmet, spectacles
• CPC Class Codes: A61B 90/30 Devices for illuminating a surgical field, the devices having an interrelation with other surgical devices or with a surgical procedure
• CPC Class Codes: A61B 90/35 Supports therefor
• CPC Class Codes: B29C 70/72 Encapsulating inserts having non-encapsulated projections, e.g. extremities or terminal portions of electrical components B29C70/742 takes precedence
• CPC Class Codes: F21V 21/084 Head fittings
• CPC Class Codes: F21V 5/04 of lens shape
• CPC Class Codes: F21W 2131/20 Lighting for medical use

Abstract

A lamp having a front surface from which light is emitted and that includes a high efficiency light source assembly producing a beam having a 3 dB beamwidth of greater than 100 AE, and which includes a substrate, a high efficiency light source supported by the substrate; and a dome-lens that contains the high efficiency light source. Also, an optical assembly is positioned to receive light from the light emitting diode assembly and to produce a headlamp light beam emitted from the front surface of the lamp. Further, an annular light block defines an annulus and is placed about the lens, so that the lens protrudes through the annulus, thereby creating a sharp boundary for the output light beam.

Claims

1. A lamp having a front surface from which light is emitted, comprising:

(a) a high efficiency light source assembly producing a beam having a 3 dB beamwidth of greater than 100°

, said assembly having;

(i) a substrate;

(ii) a high efficiency light source supported by said substrate; and

(iii) said high efficiency light source being contained in a lens in the form of a dome, positioned in front of and about said high efficiency light source and being supported by and joined to said substrate;

(b) an optical assembly positioned to receive light from said high efficiency light source assembly and produce a lamp light beam emitted from said front surface of said lamp;

(c) a housing supporting said light source and said optical assembly and an electrical conductor connected to said light source, for supplying electricity to said light source; and

(d) an annular light block, defining an annulus and placed about said lens, so that said lens protrudes through said annulus, thereby creating a sharp boundary for said output light beam.

2. The lamp of claim 1, wherein said high efficiency light source is a light emitting diode.

3. The lamp of claim 1, wherein said lens is made of silicone.

4. The lamp of claim 1, wherein said annular light block is supported by said lens.

5. The lamp of claim 1, wherein said optical assembly includes a lens having a rear surface defining a concavity into which said high efficiency light source assembly protrudes.

6. The lamp of claim 1, wherein said headlamp light beam has a circular edge wherein light intensity decreases by 20 dB over 0.5°

from a position inside said headlamp light beam to a position outside said headlamp light beam.

7. The lamp of claim 1, further having a mass of less than 30 grams.

8. The lamp of claim 1, that when said electrical conductor is connected to a one amp current source, uses about 3.15 Watts of electricity and produces a beam of greater than 300 lumens from said front surface.

9. A lamp having a light source and an annular light block positioned to block all of the light produced by the light source except for a central beam, said annular light block being thinner than 75μ

.

10. The lamp of claim 9, wherein said annular light block is thinner than 40μ

.

11. The lamp of claim 9, wherein said light source is an LED assembly.

12. The lamp of claim 11, wherein said LED assembly includes a dome lens encasing an LED.

13. The lamp of claim 9, wherein said annular light block is located within 1 cm of said light source.

14. The lamp of claim 9, that produces a light beam having an edge wherein said light intensity diminishes by 20 dB over 0.5 degrees from inside of said edge to outside of said edge.

15. A lamp having a front surface from which a beam of light is emitted, comprising:

a. a housing;

b. a high efficiency light source assembly, including a high efficiency light source covered by a lens, supported within said housing;

c. an optical assembly, supported by said housing and having a front surface that is coincident with said front surface of said lamp and positioned to accept light from said high efficiency light source assembly and to emit said light from said front surface, and having a rear surface that defines a concavity; and

d. wherein said lens protrudes into said concavity.

16. The lamp of claim 15, wherein most of the light produced by said high efficiency light source assembly is emitted from said front surface of said lamp.

17. The lamp of claim 15, wherein said high efficiency light source is a light emitting diode (LED).

18. The lamp of claim 15, wherein said optical assembly includes a prime lens, which defines said concavity and accepts light from said high efficiency light source and an exit lens which accepts light from said prime lens and defines said front surface of said optical assembly and said lamp.

19. The lamp of claim 15, further having an annular light block placed about said light source assembly at said concavity.