""" package supplying optical glass data from vendor supplied data

    The :mod:`opticalglass` package currently supports the following vendors:

        - CDGM
        - Hikari
        - Hoya
        - Ohara
        - Schott
        - Sumita

    The spreadsheets from the vendors are in the ``data`` directory.

    Fitting and modeling glass data using the Buchdahl chromatic coordinate is
    supported in the :mod:`~.buchdahl` module.
"""
