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Illuminating optical system

  • US 5,142,462 A
  • Filed: 04/27/1990
  • Issued: 08/25/1992
  • Est. Priority Date: 04/28/1989
  • Status: Expired due to Fees
First Claim
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1. An illuminating optical system comprising:

  • light source means for emitting a light beam having an elongated sectional shape on a common optical axis; and

    a condenser lens for focusing said light beam onto a sample to form a diffraction image having an elongated sectional shape.

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