Objective lens and scanning device using such an objective lens

Objective lens and scanning device using such an objective lens

  • CN 1,181,833 A
  • Filed: 02/25/1997
  • Published: 05/13/1998
  • Est. Priority Date: 03/08/1996
  • Status: Abandoned Application
First Claim
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1. , a kind of radiation laser beam is converged to object lens on the single pinpointed focus, the outer ring portion of these object lens has been introduced first spherical aberration of compensating for radiation light beam through the first hyaline layer path of first thickness in radiation laser beam, the core of annular section inside is then introduced second spherical aberration of compensating for radiation light beam through the second hyaline layer path different, second thickness in radiation laser beam.

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