# US 10,767,840 B2 · Focused LED headlamp with iris assembly

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- Number: US 10,767,840 B2
- Document ID: US10767840B2
- Status: Granted
- Kind: B2
- Application number: 16/201,818
- Filed: 2018-11-27
- Published: 2019-03-28
- Granted: 2020-09-08
- Earliest claimed: 2017-05-01
- Assignees: Riverpoint Medical, LLC
- Applicants: Riverpoint Medical, LLC
- Inventors: John Thomas Ferguson
- Web page: https://patentgrep.com/patent/US10767840B2

## CPC

- F21V 14/08: by movement of the screens {or filters}
- A61B 90/30: Devices for illuminating a surgical field, the devices having an interrelation with other surgical devices or with a surgical procedure
- A61B 90/35: Supports therefor
- A61B 90/50: Supports for surgical instruments, e.g. articulated arms
- F21V 5/008: {Combination of two or more successive refractors along an optical axis}
- F21V 5/04: of lens shape
- F21V 11/10: of iris type
- F21V 21/084: Head fittings
- A61B 2090/309: {using white LEDs}
- A61B 2090/502: {Headgear, e.g. helmet, spectacles}
- F21W 2131/20: Lighting for medical use
- F21Y 2115/10: Light-emitting diodes [LED]
- F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)
- F21W: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
- F21Y: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED

## Abstract

A headlamp includes a tubular housing; an electrical conductor entering the housing and connected to an electrical network; an LED assembly with a ceramic substrate and an LED having a light-emitting front surface; an iris assembly with a toroidal housing, an iris diaphragm and an actuator for adjusting the width of the aperture. A prime lens placed in front of the iris diaphragm and having an annular light block provided proximate a rear surface of the prime lens; and an optical assembly with at least a light focusing lens placed in front of the iris assembly.

## Claims

### Claim 1

A headlamp comprising:
(a) a tubular housing having a rear and a front;
(b) an electrical conductor, entering said housing and connected to an electrical network;
(c) an LED assembly having a light-emitting front surface, connected to the electrical conductor;
(d) a prime lens placed in front of said LED assembly;
(e) an iris assembly including a toroidal housing with an inner surface defining an interior space to the rear of the iris assembly, an iris diaphragm seated in the toroidal housing and defining a width adjustable aperture and an actuator for adjusting the width of said width adjustable aperture, said iris assembly provided in front of the prime lens;
(f) an annular light block placed between said prime lens and said iris diaphragm; and
(g) an optical assembly including at least one light focusing lens placed in front of said iris assembly,
wherein said prime lens has a convex front surface that extends into said interior space.

### Claim 2 (depends on 1)

The headlamp of claim 1, wherein said light-emitting front surface is flat.

### Claim 3 (depends on 1)

The headlamp of claim 1, wherein said annular light block is formed over said front surface of said prime lens.

### Claim 4 (depends on 1)

The headlamp of claim 1, further comprising a gap between said LED assembly and said iris diaphragm.

### Claim 5 (depends on 1)

The headlamp of claim 1, wherein said prime lens includes a rear surface and wherein said light-emitting front surface abuts said rear surface.

### Claim 6 (depends on 1)

The headlamp of claim 1, wherein said prime lens includes a rear surface and wherein a space separates said light-emitting front surface from said rear surface.

### Claim 7 (depends on 1)

The headlamp of claim 1, wherein said actuator includes an element that protrudes through said toroidal housing and said tubular housing, said element configured to be actuated by a user.

### Claim 8

A headlamp comprising:
(a) a tubular housing having a rear and a front;
(b) an electrical conductor entering said housing and connected to an electrical network;
(c) an LED assembly having a light-emitting front surface connected to the electrical conductor;
(d) an iris assembly including a toroidal housing, with a circumferential inner surface defining a front interior space toward the front of the iris assembly and a rear interior space toward the rear of the iris assembly, an iris diaphragm seated in the toroidal housing and defining a width adjustable aperture, and an actuator for adjusting the width of said width adjustable aperture, said iris assembly being placed so that said iris diaphragm is in front of said LED assembly;
(e) a prime lens placed in front of said iris diaphragm, and having a rear surface provided with an opaque annular coating forming an annular light block; and
(f) a further optical assembly, including at least one light focusing lens placed in front of said prime lens.

### Claim 9 (depends on 8)

The headlamp of claim 8, wherein said prime lens is placed entirely in front of said iris assembly.

### Claim 10 (depends on 8)

The headlamp of claim 8, wherein said prime lens is placed partially in said front interior space.

### Claim 11 (depends on 8)

The headlamp of claim 8, wherein said LED assembly protrudes into said rear interior space.

### Claim 12 (depends on 8)

The headlamp of claim 8, wherein said actuator includes an element that protrudes through said toroidal housing and said tubular housing, said element configured to be actuated by a user.