Optical waveguides – With optical coupler – Input/output coupler
Patent
1995-05-26
1997-10-07
Palmer, Phan T. H.
Optical waveguides
With optical coupler
Input/output coupler
385 33, 385 39, 385 74, 385901, 362 32, 315248, G02B 632
Patent
active
056756771
ABSTRACT:
A lamp-to-light guide coupling arrangement includes an electrodeless high intensity discharge lamp comprising an arc tube with an ionizable fill, and an excitation circuit for electrically exciting the ionizable fill to induce therein a light-producing arc discharge. The coupling arrangement further includes a coupling device comprising a generally tubular, hollow body that has an inlet end for receiving light from the arc discharge and a larger, outlet end. The coupling device further comprises an interiorly directed reflector on a surface of the hollow body for reflecting visible light. Such coupling device is shaped so as to receive light at one solid angle over an area of the inlet end and to transmit light at a smaller solid angle but over a larger area of the outlet end. The coupling device is preferably formed from dielectric material. The reflector preferably comprises a refractory optical interference filter.
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Ahlgren Frederic F.
Allen Gary R.
Cassarly William J.
Dakin James T.
Davenport John M.
General Electric Company
Hawranko George E.
Palmer Phan T. H.
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