hara's full catalog of optical glass data sheets is ready for downloading. Our glass data and HTML catalog database can be downloaded as a packed ZIP archive. Unpack the archive into a separate directory then open the file "index.html" (relates only to the HTML-version of the catalog).

The Sellmeier Formula (using constants A1, A2, A3, B1, B2, B3) is valid for our Recommended glass types only. Use of the Sellmeier Formula is as described in section 2.3 in our technical information.