Apparatus for uniform illumination of an object

• US 6,626,558 B2
• Filed: 08/31/2001
• Issued: 09/30/2003
• Est. Priority Date: 02/28/1997
• Status: Expired due to Fees

• Current Assignee: Mela Sciences, Inc.
• Original Assignee: Electro-Optical Sciences, Inc.
• Inventors: Jacobs, Adam, Momot, Tomasz
• Primary Examiner(s): Tso, Laura K.
• Application Number:
  US09/944,248
• Publication Number:
  US 20020048170A1
• Time in Patent Office: 760 Days
• Field of Search: 362/800, 362/249, 362/252, 382/128
• US Class Current: 362/109
• CPC Class Codes: A61B 1/0605 for spatially modulated illumination
• CPC Class Codes: A61B 1/0627 for variable illumination angles
• CPC Class Codes: A61B 1/0676 at distal tip of an endoscope
• CPC Class Codes: A61B 1/0684 using light emitting diodes [LED]
• CPC Class Codes: A61B 1/247 with means for viewing areas outside the direct line of sight, e.g. dentists' mirrors
• CPC Class Codes: A61B 2562/0238 Optical sensor arrangements for performing transmission measurements on body tissue
• CPC Class Codes: A61B 5/0059 using light, e.g. diagnosis by transillumination, diascopy, fluorescence A61B5/0093, A61B5/1455, A61B5/02416 and A61B5/0261 take precedence
• CPC Class Codes: A61B 5/445 Evaluating skin irritation or skin trauma, e.g. rash, eczema, wound, bed sore
• CPC Class Codes: Y10S 362/80 Light emitting diode

Abstract

A method, apparatus, and system for uniform illumination of an object is presented. A plurality of light sources is adjusted relative to a base in order to give a defined illumination pattern with respect to the base. Then, the light sources are rigidly affixed to the base.

Claims

1. An apparatus, comprising;

a base;

a large plurality of light sources fixedly attached to the base, wherein each light source has a body, and wherein at least one light source is individually adjusted with respect to the base prior to fixedly attaching the at least one light source to the base so that the at least one light source produces a defined pattern with respect to the base which is retained after fixedly attaching the at least one light source to the base.

2. The apparatus of claim 1, where at least some of the light sources are compound semiconductor devices.

3. The apparatus of claim 2, where at least some of the light sources are light emitting diodes (LED'"'"'s).

4. The apparatus of claim 2, where at least some of the light sources are semiconductor laser diodes.

5. The apparatus of claim 2, where at least some of the light sources are have non-overlapping spectral ranges.

6. The apparatus of claim 5, where at least some of the light sources are in at least three spectral ranges.

7. The apparatus of claim 6, where at least some of the light sources are in at least six spectral ranges.

8. The apparatus of claim 6, where at least some of the light sources are in a spectral wavelength range up to and including the blue spectral range and at least some of the light sources are in a spectral range down to an including the near infrared spectral range.

9. The apparatus of claim 2, where the base has an aperture, and wherein the plurality of light sources surround the aperture.

10. The apparatus of claim 9, further comprising;

a lens system attached to the base; and

an image receiving device attached to the base, wherein the light from at least some of the plurality of lamps illuminates an object, and light reflected from and scattered from the object passes through the aperture in the base and the lens system to the image receiving device.

11. The apparatus of claim 1, where at least some of the light sources are arc lamps.

12. The apparatus of claim 1, where at least some of the light sources are tungsten halogen lamps.

13. A system, comprising;

a base containing an aperture;

a large plurality of light sources fixedly attached to the base surrounding the aperture, wherein each light source has a body, and wherein at least one light source has a light pattern with respect to the body of the light source which is not reproducible from light source to light source, and wherein each light source is individually adjusted with respect to the base prior to fixedly attaching the light source to the base so that each light source produces a defined pattern with respect to the base which is retained after fixedly attaching the light source to the base, and wherein at least some of the light sources are compound semiconductor devices;

a lens system attached to the base;

an image receiving device attached to the base, wherein the light from at least some of the plurality of lamps illuminates an object, and light reflected from and scattered from the object passes through the aperture in the base and the lens system to the image receiving device;

a computer device attached to the base for analyzing the image received by the image receiving device; and

communication means for communicating results of the analysis of the image with a remote communications device.

14. The system of claim 13, where the system is contained in a handheld device connected by a cable to a power source.

15. The system of claim 14, where the system communicates with a remote computer system.

16. The system of claim 13, where the system is contained in a portable cordless handheld device powered by a portable power source within the handheld device and communicating by wireless communication means.

17. The system of claim 16, where the system communicates with a remote computer system.