WO1996017206B1

WO1996017206B1 - Surgical luminaire

Info

Publication number: WO1996017206B1
Application number: PCT/US1995/015117
Authority: WO
Filing date: 1995-11-30
Publication date: 1996-07-25

Abstract

A luminaire (10) used in a surgical field includes a pair of lenses (32, 34) positioned along an optical axis of the luminaire, for focusing a beam of light provided by a fiber optic (16). A mechanism (28) displacing the lenses with respect to one another to vary the spot sizes positioned adjacent to or apart from one another without rotating the optic fiber or the lenses. The luminaire also includes a reflecting mirror (36), positioned along the optical axis, for reflecting the beam of light into the surgical field, one or more filters (40) mounted to an exit aperture of the luminaire for filtering the beam of light, a plurality of linear polarizer (42, 44) mounted to an exit aperture (18) and to a surgical loupe respectively, and a fiber optic beam width reducer (58) reducing the beam width emitted from the fiber optic to a spot size beyond the spot size achieved by displacing the lenses.

Claims

AMENDED CLAIMS

[received by the International Bureau on 14 June 1996 (14.06.1996); original claim 22 cancelled; original claims 1, 7-10, 13, 15-16 and 20-21 amended; new claims 22-24 added; remaining claims unchanged (8 pages)] i 1. A luminaire for use during a medical procedure, said luminaire

2 comprising:

3 single fiber optic means consisting essentially of a single optic fiber for

4 providing a beam of light having an initial beam energy;

5 means for adjusting the width of the beam without substantially decreasing

6 the beam energy; and

7 means for directing the beam of adjusted width onto a surgical field.

l 2. The luminaire of claim 1. wherein the means for adjusting the width of

: the beam comprises:

3 a first optical system positioned along a path of the beam of light between the means for providing light and the means for directing the beam:

5 a second optical system positioned between the first optical system and the

6 means for directing the beam; and

7 means for displacing the first optical system with respect to the second

8 optical system: wherein

9 the first and second optical systems are configured for varying a width of 10 the beam with relative displacement of the first and second optical systems.

1 3. The luminaire of claim 2, wherein the first and second optical systems

2 are doublet lenses.

1 4. The luminaire of claim 1, wherein said means for directing the beam

2 directs the beam at an angle of 110-130 degrees from an axis along which the

3 single fiber optic means for providing the beam of light provides the beam. 5. The luminaire of claim 4, wherein said means for directing the beam is a mirror with a normal oriented at an angle of 50-70 degrees from the axis.

6. The luminaire of claim 1 further including a filter mounted within a path of the beam for altering the spectral characteristics of the beam.

7. A luminaire for use during a medical procedure, said luminaire comprising fiber optic means for providing a beam of light having an initial beam width and an initial beam energy, means for adjusting the width of the beam without substantially decreasing the beam energy, and means for directing the beam of adjusted width onto a surgical field, for use with a surgical loupe, wherein said luminaire is mounted adjacent said surgical loupe, and wherein the luminaire further includes: a first linear polarizer within a path of the beam of light for polarizing the beam of light; a second linear polarizer within the loupe; and wherein said first and second linear polarizers are rotatable with respect to one another.

8. A luminaire for use during a medical procedure, said luminaire comprising fiber optic means for providing a beam of light having an initial beam width and an initial beam energy, means for adjusting the width of the beam without substantially decreasing the beam energy, and means for directing the beam of adjusted width onto a surgical field, wherein the single fiber optic means for providing the beam of light is a primary optic fiber and wherein the luminaire further includes: a fiber optic beam width reducer, mounted directly to a transmission end of the primary optic fiber, for reducing the width of the beam of light transmitted

^■3 9

10 from the primary optic fiber, said fiber optic beam width reducer having an optic

11 fiber having a width narrower than a width of the primary optic fiber.

l 9. A surgical luminaire, comprising a single fiber optic means consisting

"> essentially of a single fiber for delivering a beam of light, and having means for

3 directing and adjusting the beam of light on a field requiring illumination, said

4 luminaire further comprising:

5 two lens systems sharing an optical axis within a path of the beam of light;

6 linear displacement means for adjusting a relative distance between the two

7 lens systems such that the linear motion changes an illuminated spot size without

8 rotating said single fiber optic means, said two lens systems configured to provide

9 a maximum spot size when positioned adjacent to one another and a minimum spot 10 size when displaced by a sufficient amount to image a distal end of the single fiber l i optic means, said lenses having a numerical aperture, when positioned adjacent to

12 one another, that is about equal to an exit numerical aperture of the single fiber

13 optic means; and

14 a mirror angled at 50° to 70° relative to the optical axis for reflecting light

15 transmitted through the two lens systems onto a field requiring illumination.

1 10. The luminaire of claim 9, wherein a first lens system of the two lens

2 systems is mounted in a fixed relationship with the fiber optic and wherein the

3 displacement means displaces a second of the two lens systems relative to the fiber

4 optic and to the first lens system.

1 11. The invention of claim 10, wherein both of the lens systems are

2 doublet lenses. 12. The luminaire of claim 9, wherein the means for directing a beam of light onto a surgical field includes: a filter means within a path of the beam of light for altering the spectral characteristics of the beam of light.

13. A surgical luminaire, having fiber optic means for delivering a beam of light, and means for directing and adjusting the beam of light on a field requiring illumination, said luminaire comprising: two lens systems sharing an optical axis within a path of the beam of light; linear displacement means for adjusting a relative distance between the two lens systems such that the linear motion changes the illuminated spot size without rotating said fiber optic means, said two lens systems configured to provide a maximum spot size when positioned adjacent to one another and a minimum spot size when displaced by a sufficient amount to image a distal end of the fiber optic means, said lenses having a numerical aperture, when positioned adjacent to one another, that is about equal to an exit numerical aperture of the fiber optic means; a mirror angled at 50° to 70° relative to the optical axis for reflecting light transmitted through the two lens systems onto the field requiring illumination, mounted adjacent a surgeon's viewing device, wherein the luminaire includes: a first linear polarizer within a path of the beam of light for polarizing the beam of light; and a second linear polarizer within the viewing device; and wherein said first and second linear polarizers are rotatable with respect to one another.

14. The luminaire of claim 9, wherein the optical axis of the two lens system defines a first axis and a mirror for directing the light along a second axis and onto a surgical field is positioned such that a normal of said mirror at an angle of between 50° and 70° from the first axis.

15. The luminaire of claim 9, further comprising: a fiber optic beam width reducer mounted directly to a transmission end of said single optic fiber, said single optic fiber being a primary optic fiber, said fiber optic beam width reducer for reducing the width of the beam of light transmitted from the primary optic fiber, said fiber optic beam width reducer having an optic fiber having a width narrower than a width of the primary optic fiber.

16. A luminaire for use during a medical procedure, said luminaire comprising: a primary optic fiber consisting essentially of a single optic fiber providing a beam of light having an initial beam width and an initial beam energy; a mirror for reflecting the beam onto a surgical field; a first optical system positioned along a path of the beam of light between the first optical system and the mirror; and a mechanical positioning system interconnected to the first optical system and the second optical system for displacing the primary optic fiber and the first optical system with respect to the second optical system; wherein the first and second optical systems are configured for varying a width of the beam width relative displacement of the first and second optical systems to vary in spot size within the surgical field.

17. The luminaire of claim 16 wherein the first and second optical systems are doublet lenses.

18. The luminaire of claim 16, wherein said mirror is oriented at an angle of 60 degrees from an axis along which the primary optic fiber directs the beam of light.

Q C.

19. The luminaire of claim 16 further including a filter mounted within a path of the beam of light for altering spectral characteristics of the beam.

20. A luminaire for use with a viewing device, said luminaire comprising: a primary optic fiber means providing a beam of light having an initial beam width and an initial beam energy; a minor for reflecting the beam onto a surgical field; a first optical system positioned along a path of the beam of light between the first optical system and the mirror; and a mechanical positioning system interconnected to the first optical system and the second optical system for displacing the primary optic fiber means and the first optical system with respect to the second optical system, wherein the first and second optical systems are configured for varying a width of the beam width relative displacement of the first and second optical systems to vary in spot size within the surgical field, and wherein the luminaire further includes: a first linear polarizer within a path of the beam of light for polarizing the beam of light; and a second linear polarizer within the viewing device; and wherein said first and second linear polarizers are rotatable with respect to one another.

21. A luminaire for use during a medical procedure, said luminaire comprising: a primary optic fiber means consisting essentially of a single optic fiber providing a beam of light having an initial beam width and an initial beam energy; a mirror for reflecting the beam onto a surgical field; a first optical system positioned along a path of the beam of light between the first optical system and the mirror; and a mechanical positioning system interconnected to the first optical system and the second optical system for displacing the primary optic fiber means and the first optical system with respect to the second optical system, wherein the first and second optical systems are configured for varying a width of the beam width relative displacement of the first and second optical systems to vary in spot size within the surgical field, said luminaire further including: a fiber optic beam width reducer, mounted directed to a transmission end of the primary optic fiber means, for reducing the width of the beam of light transmitted form the primary optic fiber means, said fiber optic beam width reducer having an optic fiber having a width narrower than a width of the primary optic fiber means.

22. A headband for mounting a luminaire to a surgeon's head, the headband comprising: a head strap consisting essentially of a perspiration-absorbent cloth strip sized for fitting around a surgeon's head; engageable hook and clasp members attached to opposing ends of said head strap, wherein said head strap fits snugly around the surgeon's head with said hook and clasp members engaged; and a luminaire-mounting member connected to the head strap and configured for mounting a luminaire to said head strap.

23. The headband of claim 22, wherein said luminaire-mounting member comprises a pocket in a middle portion of said head strap, said pocket configured for receiving a contoured rear plate of a luminaire for mounting said luminaire along a front portion of the surgeon's head, said headband further comprising clasp means, attached adjacent one of the opposing ends of said head strap, for securing a fiber optic light guide extending from the luminaire along a rear portion of the surgeon's head.

24. The headband of claim 23 in combination with a luminaire for directing a beam of light onto a surgical field, said luminaire being mounted to said headband with said luminaire-mounting member, said luminaire further including a fiber optic light guide secured to said clasp means.