Light distribution device

• US 5,031,990 A
• Filed: 12/26/1989
• Issued: 07/16/1991
• Est. Priority Date: 02/03/1989
• Status: Expired due to Fees

• Current Assignee: Kei Mori
• Original Assignee: Kei Mori
• Inventors: Mori, Kei
• Primary Examiner(s): Sikes, William L.
• Assistant Examiner(s): PALMER, PHAN T H
• Application Number:
  US07/456,909
• Time in Patent Office: 567 Days
• Field of Search: 350/96.10, 350/96.15
• US Class Current: 385/25
• CPC Class Codes: A01G 7/045 with electric lighting
• CPC Class Codes: A01G 9/249 Lighting means with special arrangements for promoting growth A01G7/045
• CPC Class Codes: C12M 21/02 Photobioreactors culturing algae A01G33/00, A01H4/001, C12N1/12
• CPC Class Codes: C12M 31/08 by conducting or reflecting elements located inside the reactor or in its structure
• CPC Class Codes: C12M 31/12 Rotating light emitting elements
• CPC Class Codes: G02B 6/0005 the light guides being of the fibre type G02B6/0003 takes precedence
• CPC Class Codes: G02B 6/2808 using a mixing element which evenly distributes an input signal over a number of outputs
• CPC Class Codes: G02B 6/2817 using reflective elements to split or combine optical signals
• CPC Class Codes: G02B 6/3504 Rotating, tilting or pivoting the waveguides, or with the waveguides describing a curved path rotary joint G02B6/3628
• CPC Class Codes: G02B 6/3558 1xN switch, i.e. one input and a selectable single output of N possible outputs
• CPC Class Codes: G02B 6/3604 Rotary joints allowing relative rotational movement between opposing fibre or fibre bundle ends
• CPC Class Codes: Y02P 60/14 Measures for saving energy, e.g. in green houses
• CPC Class Codes: Y10S 385/901 Illuminating or display apparatus

Abstract

A light distribution device has a first light-guiding cable for transmitting light rays, a number of second light-guiding cables having light-receiving ends arranged together to form a light-receiving ring plane, a driving means for rotating the light-emitting end of the first light-guiding cable around the light-receiving ring-plane, a light coupler secured at the light-emitting end of the first light-guiding cable. The light coupler has a surface similar to that of a part composing the light-receiving ring-plane of the second light-guiding cables and makes a circular motion along the light-receiving ring-plane at a constant relation thereto.

Claims

1. A light distribution apparatus comprising:

a first light-guide cable for transmitting light rays, said first light-guide cable having an end portion having a light emitting end;

a plurality of second light-guide cables each having an end portion having a light receiving end;

support means for supporting said end portions of said second light-guide cables in a generally circular array about a central axis with each of said light receiving ends being disposed in a light receiving ring plane; and

revolving means for revolving said end portion of said first light-guide cable over said light receiving ring plane, said revolving means carrying a light coupler means disposed at said light emitting end of said first light-guide cable such that when said light emitting end of said first light-guide cable passes over said light receiving ring plane, the light rays are transmitted from said light emitting end through said coupler means to said light receiving ends of said second light-guide cables, said light coupler means having a light receiving surface juxtaposed to said light emitting end of said first light-guide cable and a light emitting surface juxtaposed to said light receiving ring plane.

2. A light distribution apparatus according to claim 1, wherein said light coupler means has side surfaces extending between said light receiving surface and said light emitting surface, said side surface being reflective surfaces.

3. A light distribution apparatus according to claim 1, wherein said light coupler means has side surfaces extending between said light receiving surface and said light emitting surface, said side surfaces being clad surfaces.

4. A light distribution apparatus comprising:

a first light-guide cable for transmitting light rays, said first light-guide cable having an end portion having a light emitting end;

a plurality of second light-guide cables each having an end portion having a light receiving end;

support means for supporting said end portions of said second light-guide cables in a generally circular array about a central axis with each of said light receiving ends being disposed in a light receiving ring plane having the configuration of an annulus; and

revolving means for revolving said end portion of said first light-guide cable over said light receiving ring plane, said revolving means carrying a light coupler means disposed at said light emitting end of said first light-guide cable such that when said light emitting end of said first light-guide cable passes over said light receiving ring plane, the light rays transmitted from said light emitting end through said coupler means to said light receiving ends of said second light-guide cables, said coupler means having an overall configuration of a sector of said annulus.

5. A light distribution apparatus comprising:

a first light-guide cable for transmitting light rays, said first light-guide cable having an end portion having a light emitting end;

a plurality of second light-guide cables each having an end portion having a light receiving end;

support means for supporting said end portions of said second light-guide cables in a generally circular array about a central axis with each of said light receiving ends being disposed in a light receiving ring plane, said light receiving ring plane having an outer diameter spaced from an inner diameter; and

revolving means for revolving said end portion of said first light-guide cable over said light receiving ring plane, said revolving means carrying a light coupler means disposed at said light emitting end of said first light-guide cable such that when said light emitting end of said first light-guide cable passes over said light receiving ring plane, the light rays are transmitted from said light emitting end through said coupler means to said light receiving ends of said second light-guide cables, said coupler means having an outer circular wall having a diameter substantially equal to said outer diameter of said light receiving ring plane, said coupler means having an inner circular wall having a diameter substantially equal to said inner diameter of said light receiving ring plane.

6. A light distribution apparatus according to claim 5, wherein said coupler means has spaced side walls each disposed in an axial plane which includes said central axis.

7. A light distribution apparatus comprising:

a first light-guide cable for transmitting light rays, said first light guide cable having an end portion having a light emitting end;

a plurality of second light-guide cables each having an end portion having a light receiving end;

support means for supporting said end portions of said second light-guide cables in a generally circular array about a central axis with each of said light receiving ends being disposed in a light receiving ring plane; and

revolving means for revolving said end portion of said first light-guide cable over said light receiving ring plane, said revolving means carrying a light coupler means disposed at said light emitting end of said first light-guide cable such that when said light emitting end of said first light-guide cable passes over said light receiving ring plane, the light rays are transmitted from said light receiving ends of said second light-guide cables, said revolving means comprising a main arm which supports said coupler means, and an auxiliary arm extending from said main arm for supporting said end portion of said first light-guide cable.

8. A light distribution apparatus comprising:

a first light-guide cable for transmitting light rays, said first light-guide cable having an end portion having a light emitting end;

a plurality of second light-guide cables each having an end portion having a light receiving end;

support means for supporting said end portions of said second light-guide cables in a generally circular array about a central axis with each of said light receiving ends being disposed in a light receiving ring plane; and

revolving means for revolving said end portion of said first light-guide cable over said light receiving ring plane, said revolving means carrying a light coupler means disposed at said light emitting end of said first light-guide cable such that when said light emitting end of said first light-guide cable passes over said light receiving ring plane, the light rays are transmitted from said light emitting end through said coupler means to said light receiving ends of said second light-guide cables, said revolving means comprising a revolving arm supporting one part of said first light-guide cable and a stationary arm supporting another part of said first light-guide cable.

9. A light distribution apparatus according to claim 8 further comprising a rotary bearing on said revolving arm for rotatably supporting said one part of said first light-guide cable.

10. A light distribution apparatus according to claim 8 further comprising a spherical bearing for supporting said other part of said first light-guide cable or said stationary arm.

11. A light distribution apparatus according to claim 10, wherein said spherical bearing has a center which is coincident with said central axis.

12. A light distribution apparatus comprising:

a first light-guide cable for transmitting light rays, said first light-guide cable having an end portion having a light emitting end;

a plurality of second light-guide cables each having an end portion having a light receiving end;

support means for supporting said end portions of said second light-guide cables in a generally circular array about a central axis with each of said light receiving ends being disposed in a light receiving ring plane; and

revolving means for revolving said end portion of said first light-guide cable over said light receiving ring plane, said revolving means carrying a light coupler means disposed at said light emitting end of said first light-guide cable such that when said light emitting end of said first light-guide cable passes over said light receiving ring plane, the light rays are transmitted from said light emitting end through said coupler means to said light receiving ends of said second light-guide cables, said revolving means comprising motor means having a drive shaft, said revolving means further comprising a linkage means between said drive shaft and said end portion of said first light-guide cable, said drive shaft having an axis coincident with said central axis.

13. A light distribution apparatus comprising:

a first light-guide cable for transmitting light rays, said first light-guide cable having an end portion having a light emitting end;

a plurality of second light-guide cables each having an end portion having a light receiving end;

support means for supporting said end portions of said second light-guide cables in a generally circular array about a central axis with each of said light receiving ends being disposed in a light receiving ring plane; and

revolving means for revolving said end portion of said first light-guide cable over said light receiving ring plane, said revolving means carrying a light coupler means disposed at said light emitting end of said first light-guide cable such that when said light emitting end of said first light-guide cable passes over said light receiving ring plane, the light rays are transmitted from said light emitting end through said coupler means to said light receiving ends of said second light-guide cables, said revolving means comprising a motor means, first linkage means between said motor means and one part of said first light-guide cable for revolving said first part over said light receiving ring plane, second linkage means between said motor means and a second part of said first light-guide cable for revolving said second part about a circle, said one part of said first light-guide cable being axially spaced from said second part of said first light-guide cable.

14. A light distribution apparatus according to claim 13, wherein said first linkage means comprises a first link arm rotatably connected to said first part of said first light-guide cable, a first driven shaft driven by said motor means, and a first eccentric connection between said first driven shaft and said first link arm.

15. A light distribution apparatus according to claim 14, wherein said second linkage means comprises a second link arm rotatably connected to said second part of said first light-guide cable, a second driven shaft driven by said motor means, and a second eccentric connection between said second driven shaft and said second link arm.

16. A light distribution apparatus according to claim 15, wherein said first and second driven shafts having aligned axes.

17. A light distribution apparatus according to claim 15, wherein said first and second eccentric connections are 180 degrees out of phase with one another.

18. A light distribution apparatus according to claim 13, wherein said revolving means further comprises a fixed mounting means having a mounting arm, and bearing means rotatably mounting said mounting arm on a third part of said first light-guide cable, said third part being axially intermediate said one and said second parts.

19. A light distribution apparatus according to claim 18, wherein said motor means is mounted on said mounting means.

20. A light distribution apparatus according to claim 13, wherein said second link arm has an intermediate section, said mounting means having a support rod for supporting said intermediate section of said second link arm.