Medical headlamp optical arrangement

• US 9,687,314 B2
• Filed: 08/21/2013
• Issued: 06/27/2017
• Est. Priority Date: 05/13/2013
• Status: Active Grant

• Current Assignee: Riverpoint Medical Llc
• Original Assignee: Riverpoint Medical Llc
• Inventors: Ferguson, John Thomas
• Primary Examiner(s): Lee, Jong-Suk (James)
• Assistant Examiner(s): SONG, ZHENG B
• Application Number:
  US13/972,446
• Publication Number:
  US 20140334159A1
• Time in Patent Office: 1,406 Days
• Field of Search: 362103, 362105, 362310, 36231102, 36231103, 36234404, 36231109, 362329, 362339, 362248, 362303, 257 98
• 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°, 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 medical headlamp having a front surface from which an output light beam is emitted, comprising:

(a) a high efficiency light source assembly producing a high efficiency light source beam having a high efficiency light source beamwidth, 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 silicone 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 medical headlamp;

(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 that is placed about and circumferentially touches said silicone lens and having a forward facing surface facing toward said front surface of said lamp and a rearward facing surface facing in opposite direction from said forward facing surface, so that said lens protrudes through said annulus and said light block rearward facing surface blocks peripheral light produced by said light source, leaving an annular light block exit beam, having a beamwidth substantially the same as said high efficiency light source beamwidth, but wherein said annular light block exit beam has a sharper border than said high efficiency light source light beam, thereby creating a sharp boundary for said output light beam.

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

3. The medical headlamp 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.

4. The medical headlamp of claim 1, further having a mass of less than 30 grams.

5. The medical headlamp 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.

6. The medical headlamp of claim 1, wherein said annular light block being thinner than 75 μ

m.

7. The lamp of claim 6, wherein said annular light block is thinner than 40 μ

m.

8. The medical headlamp of claim 1, wherein said dome lens encases said LED.

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

10. The medical headlamp of claim 1, wherein said high intensity light source beamwidth is 120°

and said central beam beamwidth is 120°

.