Lens system for inspection of an eye

Patent metadata

Field	Value
Publication number	US-10238283-B2
Application number	US-201515525268-A
Country	US
Kind code	B2
Filing date	Nov 9, 2015
Priority date	Nov 9, 2014
Publication date	Mar 26, 2019
Grant date	Mar 26, 2019

Abstract

A novel surgical lens system including a lens and a reflective element. The lens is placed on, or above, a cornea of an eye of a subject for enabling inspection of the eye. The reflective element is incorporated into the lens. The reflective element reflects a light beam toward the eye of the subject. The reflective element increases the divergence of the light beam, such that the divergence of the reflected light beam is larger than the divergence of the light beam. The light beam is emitted by a non-invasive light source positioned externally to the eye.

First claim

The invention claimed is:

1. A lens system for inspection of an eye of a subject comprising:
a lens arranged to be placed either one of on and above a cornea of said eye; said lens configured to form an image of said eye; and
a reflective element placed away from the periphery of said lens, so that said reflective element partially occludes a field of view (FOV) of said lens, said reflective element is incorporated into said lens;
wherein said reflective element being configured to reflect a light beam, emitted by a non-invasive light source positioned externally to said eye, and thereby to direct a reflected light beam toward said eye of said subject, said reflective element being further configured to increase the divergence of said light beam, such that the divergence of said reflected light beam is larger than the divergence of said light beam.

2. The lens system of claim 1 , wherein said reflected light beam passes through said lens, and wherein said lens has optical power and is configured to increase the divergence of said reflected light beam, wherein the beam divergence increase of said reflective element is augmented.

3. The lens system of claim 1 , wherein a beam diameter of said reflected light beam covers a field of view of said lens on a retina of said eye.

4. The lens system of claim 1 , wherein said reflective element is positioned along an optical axis of said lens.

5. The lens system of claim 1 , further comprising a waveguide incorporated into said lens, said waveguide arranged to receive said light beam from said light source and to guide said light beam via said lens toward said reflective element.

6. The lens system of claim 5 , wherein said waveguide being an optical fiber.

7. The lens system of claim 1 , wherein said reflective element includes a plurality of reflective elements positioned such that each of said reflective elements occlude a portion of FOV of said lens, each of said reflective elements being configured to reflect a portion of said light beam.

8. The lens system of claim 1 , further comprising a holder by which a user can hold said lens system.

9. The lens system of claim 8 , wherein said light source is incorporated into said holder.

10. The lens system of claim 1 , wherein said reflective element is not incorporated into said lens, and wherein said reflective element is located within a field of view of said lens.

11. The lens system of claim 1 , wherein said reflective element is not incorporated into said lens, and wherein said lens is located within said reflected light beam.

12. The lens system of claim 1 , wherein said reflective element is composed of a reflective component and a divergence increase component having optical power.

13. The lens system of claim 1 , further comprising a zooming mechanism for controlling the zoom of said light beam.

14. The lens system of claim 1 , wherein said lens being a disposable lens by being configured to be coupled with and to be decoupled from said light source.

Assignees

• Elbit Systems Ltd

Inventors

• Zeitouny Abraham
• Schneider Ron

Classifications

• A61B3/0008

  provided with illuminating means (A61B3/117, A61B3/14 take precedence) · CPC title

• A61B90/36

  Image-producing devices or illumination devices not otherwise provided for · CPC title

• A61B3/12 Primary

  for looking at the eye fundus, e.g. ophthalmoscopes (A61B3/13 takes precedence) · CPC title

• A61B3/125

  with contact lenses · CPC title

• A61B3/102

  for optical coherence tomography [OCT] · CPC title