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