def read_uic3tag(fh, byteorder, dtype, plane_count):
    """Read MetaMorph STK UIC3Tag from file and return as dictionary."""
    assert dtype == '2I' and byteorder == '<'
    values = fh.read_array('<u4', 2 * plane_count).reshape(plane_count, 2)
    return {'wavelengths': values[:, (0)] / values[:, (1)]}
