Preform for optical element and optical element

Preform for optical element and optical element

  • CN 101,076,501 A
  • Filed: 12/09/2005
  • Published: 11/21/2007
  • Est. Priority Date: 12/13/2004
  • Status: Active Application
First Claim
Patent Images

1. pre-type body that is used for the moulded optical glass elements, it presents the quasi-circular with predetermined diameter in top view, in side-view, present and have protruding downwards curve and the flat semicircle of the collinear of level almost on the upper surface, thereby make the lowermost portion of convex curve and collinear distance become this flat semicircular predetermined height, and this pre-type body has concave surface at upper surface, has convex surface in the bottom surface, whereinConcave surface on upper surface approximate centre position of quasi-circular in described top view constitutes the lowermost portion of this concave surface;

  • Convex surface on the bottom surface is constituting the lowermost portion of this convex surface with the corresponding bottom center in described approximate centre position position;

    AndThe described diameter ratio of quasi-circular is 0.2 to 0.9 in described flat semicircular described height and the described top view.

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