Medical headlamp optical arrangement

• US 10,441,378 B2
• Filed: 05/22/2017
• Issued: 10/15/2019
• 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): Song, Zheng
• Application Number:
  US15/601,061
• Publication Number:
  US 20170252122A1
• Time in Patent Office: 876 Days
• 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 lamp having a front surface from which an output light beam having an output light beam width is emitted, comprising:

(a) a high efficiency light source assembly producing a beam having a 3 dB beam width of greater than or equal to said output light beam width, 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 and produce a lamp light beam emitted from said front surface of said lamp;

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

(d) an annular light block, having a back, defining an annulus and placed on and about said lens, so that said lens protrudes through said annulus;

(e) whereby some of said light emitted from said high energy light source, but at an angle outside of said output light beam width, strikes said back of said annular light block and is reflected back, away from said front surface, 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 light emitting diode assembly protrudes.

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

7. 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.