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Optical system, exposure system, and exposure method

  • US 8,339,578 B2
  • Filed: 02/05/2010
  • Issued: 12/25/2012
  • Est. Priority Date: 01/27/2004
  • Status: Expired due to Fees
First Claim
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1. An optical system including an optical axis, comprising:

  • a first optically transparent member which is made of a uniaxial crystal material and a crystallographic axis of which is arranged substantially in parallel with the optical axis;

    a second optically transparent member which is made of a uniaxial crystal material and a crystallographic axis of which is arranged substantially in parallel with the optical axis; and

    an optical member located in an optical path between the first optically transparent member and the second optically transparent member and including a predetermined power,wherein a beam bundle of substantially spherical waves in a substantially circular polarization state is incident to the first optically transparent member.

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