Apparatus and method for redirecting camera flash light so as to avoid red-eye

• US 5,337,104 A
• Filed: 11/09/1992
• Issued: 08/09/1994
• Est. Priority Date: 11/09/1992
• Status: Expired due to Fees

• Current Assignee: Martin Yate, Neil D. Smith
• Original Assignee: Martin Yate, Neil D. Smith
• Inventors: Yate, Martin, Smith, Neil D.
• Primary Examiner(s): Gray, David M.
• Application Number:
  US07/973,615
• Time in Patent Office: 638 Days
• Field of Search: 362/16-18, 354/126, 354/141, 354/148, 354/149.1, 354/149.11
• US Class Current: 396/199
• CPC Class Codes: G03B 15/05 Combinations of cameras with electronic flash apparatus; Electronic flash units
• CPC Class Codes: G03B 2215/0507 Pop-up mechanisms

Abstract

An apparatus for redirecting beams of light emanating from the flash of a camera so as to avoid the creation of "red-eye" in a photograph. The apparatus redirects the beams of lights so as to be distanced even further from the central axis of the camera lens. To provide the full effect of the flash, the apparatus redirects the beams of light in a direction parallel to the original direction the light beams travel off from the flash and to the central axis of the lens. The apparatus includes a main body which forms an enclosure with an inlet and outlet opening and is attached to the camera such that the inlet opening is aligned with and covers the camera'"'"'s flash. The main body includes at least two reflective surfaces for redirecting the flash beam from a first direction to a second direction and then from the second direction to a third direction exiting the main body. The device can be releasably mounted to existing flash cameras (including pop-out flash members). It can also be built into new compact cameras and act as a sliding lens cover and power switch. With the built-in design, the flash of the camera can be directed either vertically or to one side of the camera and a built-in light shifter with single reflective surface is provided to redirect the light parallel and far removed from the central axis of the lens.

Claims

1. An apparatus for shifting light beams originating from a flash source of a camera, comprising:

a main body having an inlet opening and an outlet opening;

means for mounting the inlet opening of said main body over the flash source of the camera such that the inlet opening extends about and surrounds the flash source so as to avoid a splitting of the light beams originating from the flash source.

said main body including a first reflective surface positioned downstream in a direction of travel of the light beams from the flash source when said main body is mounted on the camera, said first reflective surface being positioned to redirect the beams of light from a first direction of travel to a second direction of travel,

said main body also including a second reflective surface positioned downstream in a direction of light beam travel from said first reflective surface, said second reflective surface being positioned so as to redirect the beams of light reflected by said first reflective surface from the second direction of travel to a third direction of travel which extends through the outlet opening of said main body.

2. An apparatus as recited in claim 1, wherein said first and second reflective surfaces are positioned such that said first and third directions of light beam travel extend essentially parallel to one another.

3. An apparatus as recited in claim 2, wherein said first and second reflective surfaces are positioned such that said second direction of light beam travel is essentially perpendicular to said first and third directions of light beam travel.

4. An apparatus as recited in claim 1, wherein the camera includes a lens having a central axis and said first and second reflective surfaces are positioned such that said third direction of light beam travel is parallel to the central axis of the lens.

5. An apparatus as recited in claim 4 wherein, when the main body is mounted on the camera, the flash source is positioned so as to direct beams of light essentially parallel to the central axis of the lens, and said first reflective surface is orientated at essentially a 45°

angle with respect to a line extending from the flash source to said first reflective surface, and said second reflective surface is orientated at essentially a 45°

angle with respect to a line extending from the first reflective surface to said second reflective surface.

6. An apparatus as recited in claim 1, wherein said main body, except for said inlet and outlet opening, provides an enclosure which is free of openings through which light beams from the flash source can escape.

7. An apparatus as recited in claim 1 wherein said mounting means includes a flange extending off from said main body.

8. An apparatus as recited in claim 7 wherein said flange has a lower planar surface that extends away from said main body in a direction parallel to said first direction of light beam travel.

9. An apparatus as recited in claim 1 wherein said main body further comprises a plurality of interior surfaces which adjoin said first and second reflective surfaces and are also light reflective.

10. A camera assembly, comprising:

a camera which includes a flash member and a lens member, a central axis of said flash member being spaced a first distance from a central axis of said lens member;

a flash light beam shifting device which includes a main body having an inlet opening, a first reflective surface and a second reflective surface, said flash light shifting device further including means for mounting said main body to said camera such that all light beams emanating from the flash member are directed through the inlet opening so as to avoid a splitting of light beams emanating from the flash member and such that a beam of light, originating from said flash member and extending in a first direction of travel away from said flash member, strikes said first reflective surface and is redirected as to travel so in a second direction of travel and contact said second reflective surface so as to be redirected in a third direction of travel extending out of said main body and along an axis which is parallel to the central axis of the lens member and spaced a distance from the central axis of said lens member that is greater than said first distance.

11. A camera assembly as recited in claim 10 wherein said camera includes a main housing and means for moving said flash member between a retracted stowage position within said main housing and an extended position wherein at least a portion of said flash member extends out away from said main housing, and said mean body of said flash light beam shifting device including a chamber for receiving said flash member when in the extended position such that the central axis of the flash member intersects said first reflective surface.

12. A camera assembly as recited in claim 10 wherein said main body of said flash light beam shifting device includes the inlet opening defined by a first edge of said main body and an outlet opening defined by a second edge of said main body, and said main body having an exterior surface which extends between said first and second edges and extends about the entire periphery of said inlet and outlet openings so as to provide an enclosure that prevents the escape of any light beams between said inlet and outlet openings.

13. A camera assembly as recited in claim 12 wherein said interior surface of said main body includes a first sloped wall which defines said first reflective surface and a second sloped wall which defines said second reflective surface.

14. A camera assembly as recited in claim 13 wherein said first and second sloped walls have a slope of 45°

.

15. An apparatus for redirecting light beams emanating from a flash of a camera away from a lens of the camera so as to avoid red-eye, comprising

a main body which is in the form of an enclosure with an inlet opening and an outlet opening,

mounting means for mounting the inlet opening of said main body over the camera flash, said main body including means for redirecting light beams emanating from the camera flash in a first direction parallel to a central axis of the camera lens, when said main body is mounted on the camera, such that the light beams exit the outlet opening parallel to the first direction and further removed from the central axis of the camera lens than when travelling in the first direction, and the inlet opening extending about said camera flash such that a splitting of light beams emanating from the flash is avoided.

16. A camera assembly as recited in claim 15 wherein said means for redirecting light beams includes a first reflective surface formed on an interior surface of said main body which is oriented at essentially 45°

with respect to a central axis of the flash member, and a second reflective surface which is oriented at essentially 45°

with respect to a line extending between said first and second reflective surfaces.

17. A camera assembly as recited in claim 15 wherein said mounting means is dimensioned and arranged such that said main body is shiftable in position with respect to said camera from a storage position wherein said inlet opening is away from said flash to an operating position wherein said inlet opening extends about said flash.

18. A camera assembly, comprising:

a camera housing which supports a lens having a central axis which extends in a first direction;

said camera housing further supporting a flash unit which has a central axis extending in a non-parallel relationship with the central axis of the lens;

said camera housing further supporting a flash light beam shifting device having a main body that supports a reflective surface which is adapted to redirect light beams emanating from the flash unit from a first direction extending essentially parallel to the central axis of the flash unit to a second direction extending essentially parallel to the central axis of said lens, and said main body being directly supported by the camera housing such that the main body and flash light beam shifting device encompass the flash, and wherein the main body of said flash light beam shift device includes a rear wall slidingly received within a shoulder portion formed in said housing and an upper wall extending off from said rear wall which also is slidingly received by said housing such that when in a contracted and an extended position said flash unit is encompassed by said rear wall and upper wall of said main body and said shoulder portion of said camera housing.

19. A camera assembly, comprising:

a camera housing which supports a lens having a central axis which extends in a first direction;

said camera housing further supporting a flash unit which has a central axis extending in a non-parallel relationship with the central axis of the lens;

said camera housing further supporting a flash light beam shifting device having a main body that supports a reflective surface which is adapted to redirect light beams emanating from the flash unit from a first direction extending essentially parallel to the central axis of the flash unit to a second direction extending essentially parallel to the central axis of said lens, and said main body being directly supported by the camera housing such that the main body and flash light beam shifting device encompass the flash unit, and wherein said flash light beam shifting device is slidable with respect to said housing from a stowage position to an operating position, and said camera assembly comprising a switch and a flash unit power source and said switch being dimensioned and arranged such that sliding said light beam shifting device from the stowage mode to an operation mode triggers said switch so as to activate said power source.

20. A camera assembly, comprising:

a camera which includes a first member and a lens member, a central axis of said flash member being spaced a first distance from a central axis of said lens member;

a flash light beam shifting device which includes a main body having a first reflective surface and a second reflective surface, said flash light shifting device further including means for mounting said main body to said camera such that a beam of light, originating from said flash member and extending in a first direction of travel away from said flash member, strikes said first reflective surface and is redirected so as to travel in a second direction of travel and contact said second reflective surface so as to be redirected in a third direction of travel extending out of said main body and along an axis which is parallel to the central axis of the lens member and spaced a distance from the central axis of said lens member that is greater than said first distance, and wherein said camera includes a main housing and means for moving said flash member between a retracted stowage position within said main housing and an extended position wherein at least a portion of said flash member extends out away from said main housing, and said main body of said flash light beam shifting device including a chamber for receiving said flash member when in the extended position such that the central axis of the flash member intersects said first reflective surface.

21. An apparatus for redirecting light beams emanating from a flash of a camera away from a lens of the camera so as to avoid red-eye, comprising

a main body which is in the form of an enclosure with an inlet opening and an outlet opening,

mounting means for mounting the inlet opening of said main body over the camera flash, said main body including means for redirecting light beams emanating from the camera flash in a first direction parallel to a central axis of the camera lens, when said main body is mounted on the camera, such that the light beams exit the outlet opening parallel to the first direction and further removed from the central axis of the camera lens than when travelling in the first direction, and wherein said mounting means is dimensioned and arranged such that said main body is shiftable in position with respect to said camera from a storage position wherein said inlet opening is away from said flash to an operating position wherein said inlet opening extends about said flash.

22. A camera assembly as recited in claim 21 wherein said outlet opening is covered by a transparent or translucent cover.

23. A camera assembly as recited in claim 21 wherein said camera includes a view finder window and said main body includes a notched section which is dimensioned and arranged such that said main body avoids blocking the view finder window when said main body is in said storage position.

24. A camera assembly, comprising:

a camera housing which supports a lens having a central axis which extends in a first direction;

said camera housing further supporting a flash unit which has a central axis extending in a non-parallel relationship with the central axis of the lens;

said camera housing further supporting a flash light beam shifting device having a reflective surface which is adapted to redirect light beams emanating from the flash unit from a first direction extending essentially parallel to the central axis of the flash unit to a second direction extending essentially parallel to the central axis of said lens, and wherein said flash light beam shifting device includes a rear wall slidingly received within a shoulder portion formed in said housing and an upper wall extending off from said rear wall which also is slidingly received by said housing such that when in a contracted and an extended position said flash unit is surrounded by said rear wall, upper wall and shoulder portion.

25. A camera assembly, comprising:

a camera housing which supports a lens having a central axis which extends in a first direction;

said camera housing further supporting a flash unit which has a central axis extending in a non-parallel relationship with the central axis of the lens;

said camera housing further supporting a flash light beam shifting device having a reflective surface which is adapted to redirect light beams emanating from the flash unit from a first direction extending essentially parallel to the central axis of the flash unit to a second direction extending essentially parallel to the central axis of said lens, and wherein said flash light beam shifting device is slidable with respect to said housing from a storage position to an operating position, and said camera assembly comprising a switch and a flash unit power source and said switch being dimensioned and arranged such that sliding said light beam shifting device from the stowage mode to an operation mode triggers said switch so as to activate said power source.