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Control of laser photocoagulation using Raman radiation

  • US 4,758,081 A
  • Filed: 07/18/1985
  • Issued: 07/19/1988
  • Est. Priority Date: 07/18/1985
  • Status: Expired due to Term
First Claim
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1. Apparatus for applying laser radiation to a target in an eye and for monitoring the progress of resultant photocoagulation which comprises:

  • a laser source,a fiber optic cable for receiving laser radiation and transmitting it to said target,means for detecting backscattered Raman radiation from the target, said means comprising a beamsplitter, a band rejection filter, a monochromator and a photodetector,said beamsplitter being disposed to direct the backscattered Raman radiation from the target through said band rejection filter which strips Rayleigh reflected light from the Raman radiation and transmits the latter to the monochromator, and said photodetector functioning to receive the output from the monochromator and provide an electrical signal indicative of the level of Raman backscatter from the target and of the resultant photocoagulation.

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