Pattern illumination device

• US 5,988,815 A
• Filed: 10/24/1997
• Issued: 11/23/1999
• Est. Priority Date: 10/24/1997
• Status: Expired due to Fees

• Current Assignee: Tomey Corporation
• Original Assignee: Tomey Corporation
• Inventors: Tibbling, Lars E., Cappo, Anthony P., MacFarlane, Malcolm, Maus, Roy C.
• Primary Examiner(s): Dang, Hung Xuan
• Application Number:
  US08/957,355
• Time in Patent Office: 760 Days
• Field of Search: 351/221, 351/208, 351/205, 351/209, 351/210, 351/211, 351/212, 351/20, 351/246
• US Class Current: 351/221
• CPC Class Codes: A61B 3/107 for determining the shape or measuring the curvature of the cornea

Abstract

An apparatus for illuminating a portion of a patient'"'"'s body includes an enclosure having a generally smoothly curved shape, an internal light-scattering surface, and an opening. A light source provides light to a portion of the light-scattering surface within the enclosure so as to illuminate the surface via scattering of the light on the surface. An at least partially transparent member is positioned within the enclosure so that scattered light passes through it and through the opening.

Claims

1. An apparatus for illuminating a portion of a patient'"'"'s body comprising,

an enclosure having a generally smoothly curved shape, an internal light-scattering surface, and an opening,

a light source providing light to a portion of said light-scattering surface within said enclosure so as to illuminate said light-scattering surface via scattering of said light on said surface, and

an at least partially transparent member that is positioned within said enclosure so that scattered light passes through it and through said opening.

2. The apparatus of claim 1 wherein said at least partially transparent member has a pattern of opaque and transparent portions.

3. The apparatus of claim 2 wherein said pattern is a ring pattern.

4. The apparatus of claim 2 wherein said pattern is a radial pattern.

5. The apparatus of claim 1 wherein said portion is a patient'"'"'s eye, and said light scattering surface is egg-shaped, with the smaller diameter portion and opening directed toward said patient'"'"'s eye.

6. The apparatus of claim 1 wherein said at least partially transparent member is tubular and has an open end at said opening.

7. The apparatus of claim 6 wherein said at least partially transparent member is cylindrical.

8. The apparatus of claim 6 wherein said at least partially transparent member has varying diameter.

9. The apparatus of claim 6 wherein said at least partially transparent member extends from enclosure and has a pattern of opaque and transparent portions, the portion extending from said enclosure being illuminated by light traveling along the length of a side wall of the at least partially transparent member.

10. The apparatus of claim 6 wherein said at least partially transparent member has a pattern of opaque and transparent portions, and wherein said at least partially transparent member has a disk with pattern at an end of the at least partially transparent member that is within enclosure.

11. The apparatus of claim 1 further comprising multiple light sources.

12. The apparatus of claim 11 further comprising a diffuser positioned between said sources and said at least partially transparent member.

13. The apparatus of claim 11 wherein at least two said light sources have different color light.

14. The apparatus of claim 1 wherein said light source is an LED.

15. The apparatus of claim 1 wherein said enclosure is generally spherical at portion away from said opening.

16. An ophthalmic apparatus comprising

instrumentation for performing an ophthalmic procedure with respect to a patient'"'"'s eye,

an enclosure having a generally smoothly curved shape, an internal light-scattering surface, and an opening positioned near a patient'"'"'s eye when said patient is aligned with said instrumentation,

a light source providing light to a portion of said light-scattering surface within said enclosure so as to illuminate said light-scattering surface via scattering of said light on said surface, and

an at least partially transparent member that is positioned within said enclosure so that scattered light passes through it and through said opening.