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Static multi-color light signal

  • US 4,488,207 A
  • Filed: 08/18/1983
  • Issued: 12/11/1984
  • Est. Priority Date: 08/18/1983
  • Status: Expired due to Term
First Claim
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1. A multi-color light signal unit comprising, at least one lamp for producing light rays, at least one parabolic mirror for reflecting the light rays in a substantially parallel orientation to the axial ray, at least one color filter for transmitting specific wavelengths of the light rays and for reflecting or absorbing all other wavelengths of the light, and at least one inclined dichroic filter of selected angle of incidence for receiving the passed wavelengths of the light at substantially the same angle of incidence as the angle of incidence of the dichroic filter and for conveying the passed wavelengths of the light onto a lens system which projects a signal light of homogeneous hue.

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