# US 7,609,453 B2 · Ophthalmological display including a device for adjusting focus

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- Number: US 7,609,453 B2
- Document ID: US7609453B2
- Status: Granted
- Kind: B2
- Application number: 11/628,631
- Filed: 2005-06-21
- Published: 2008-07-03
- Granted: 2009-10-27
- Earliest claimed: 2004-07-02
- Assignees: Essilor International (Compagnie Generale d'Optique)
- Inventors: Renaud Moliton; Benjamin Rousseau
- Web page: https://patentgrep.com/patent/US7609453B2

## CPC

- G02B 27/0176: {characterised by mechanical features}
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS

## Abstract

The invention relates to an ophthalmological display comprising an optical imager (10) for shaping light beams emitted by an optical element of a light beam generator system (20) and directing them towards the eye (O) of the wearer as to enable information content (I) to be viewed, said display being fitted with a device for adjusting focusing by adjusting the length of said light beams between said element and the imager. According to the invention, the generator system comprises a stationary part (21) referred to as a stationary plate, to which said optical element is connected by a moving connection (22) that is adjustable by an actuator device.

## Claims

### Claim 1

An ophthalmological display comprising:
an optical imager for shaping light beams emitted by an optical element of a light beam generator system and for directing the beams towards an eye of a wearer so as to enable information content to be viewed, the display being fitted with a focus adjustment device for adjusting the length of said light beams between said element and the imager, said imager being integrated in a lens for mounting in a frame for eyeglasses,
wherein said adjustment device is internal to a housing containing said light beam generator system, and in that said generator system includes a stationary part referred to as a stationary plate, having connected thereto said optical element, via a moving connection that is an elastically-deformable element and is adjustable by an actuator device.

### Claim 2 (depends on 1)

A display according to claim 1, wherein said optical element is secured to a second plate connected to the stationary first plate by said moving connection.

### Claim 3 (depends on 1)

A display according to claim 1, wherein said actuator device is external to said housing.

### Claim 4 (depends on 1)

A display according to claim 1, wherein said elastically-deformable element is a deformable fork.

### Claim 5 (depends on 1)

A display according to claim 1, wherein said actuator device is a knob provided with an eccentric cylinder, said knob being mounted to turn relative to a stationary portion of the housing and said eccentric cylinder being in abutment against said second plate.

### Claim 6 (depends on 1)

A display according to claim 1, wherein said actuator device is a screw screwed into a stationary portion of the housing and in abutment against said second plate.

### Claim 7 (depends on 1)

A display according to claim 1, wherein an adapter is in a reference position relative to the imager and receives said generator system together with its focus adjustment device by engagement of at least two studs.

### Claim 8 (depends on 7)

A display according to claim 7, wherein the connection between said system and said adapter (13) is releasable.

### Claim 9 (depends on 1)

A display according to the claim 1, wherein said adapter is secured to said stationary plate.

### Claim 10 (depends on 1)

A display according to claim 1, wherein said optical element is a miniature screen.

### Claim 11 (depends on 1)

A display according to claim 1, wherein said stationary plate carries an associated optical component.