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LED light standard for photo- and videomicroscopy

  • US 5,489,771 A
  • Filed: 10/15/1993
  • Issued: 02/06/1996
  • Est. Priority Date: 10/15/1993
  • Status: Expired due to Fees
First Claim
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1. A light calibration device comprising diffused LED light source, control means to provide feedback control of intensity, said control means including a photodiode positioned to detect output light intensity from said diffused LED source, light diffuser means, said diffused LED source being encapsulated in said diffuser means, whereby the light from said LED light source is homogenized and a flat field of illumination is obtained.

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