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Optical device having multiple wavelength dependent optical paths

  • US 4,456,329 A
  • Filed: 12/01/1981
  • Issued: 06/26/1984
  • Est. Priority Date: 10/12/1979
  • Status: Expired due to Fees
First Claim
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1. An optical system comprising(a) a wavelength dependent multipath optical transmission device having at least first and second optical paths therethrough, including;

  • (1) first and second optically transparent members each having an optical axis, a substantially square cross section and first and second ends;

    (2) a dichroic layer positioned between said second ends of said first and second members such that said optical axes of said first and second members are positioned end to end and substantially parallel with respect to each other, with said dichroic layer being positioned at an angle of substantially forty-five degrees with respect to said optical axes of said first and second optically transparent members;

    (3) a third optically transparent member having an optical axis, having first and second ends and a substantially square cross section;

    (4) means for affixing said third optically transparent member to said first optically transparent member such that the optical axis of said third transparent member intersects the optical axis of said first optically transparent member with the point of intersection and said second end of said first optically transparent member substantially coinciding; and

    (5) first, second, third and fourth anti-reflective layers respectively affixed to said first ends of said first, second and third optically transparent members and to the longest edge of said second optically transparent member to reduce reflections which may occur at the edge surface of said second optically transparent member as a result of partial reflection at said dichroic layer;

    (b) an optical fiber coupled to receive optical energy from and couple optical energy to said first optically transparent member;

    (c) transmitting means for generating an optical beam and coupling said optical beam to said optical fiber via one of said wavelength dependent paths; and

    (d) receiving means coupled to receive optical energy from said optical fiber via a second one of said wavelength dependent optical paths.

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