Standard

NS-EN ISO 7944:1998

Withdrawn

Note: This standard has a new edition: NS-EN ISO 7944:2024

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Abstract

This International Standard specifies two reference wavelengths to be used for the characterization of optical materials, optical systems and instruments, as well as ophthalmic lenses. It defines the associated principal refractive indices and principal dispersions, as well as the Abbe numbers with regard to these reference wavelengths and principal dispersions.

Document information

  • Standard from SN
  • Published:
  • Withdrawn:
  • Edition: 1998-06
  • Version: 1
  • Document type: NAT
  • ICS 17.180.01
  • National Committee CEN/TC 170

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