Fringe matrix in Y

    :param theta: fringe angle, in [rad]
    :param rho: bend radius, in [m]
    :return: 2x2 numpy array

def funTransEdgeY(theta, rho):
    """ Fringe matrix in Y

    :param theta: fringe angle, in [rad]
    :param rho: bend radius, in [m]
    :return: 2x2 numpy array
    """
    return np.matrix([[1, 0], [-np.tan(theta) / rho, 1]], dtype=np.double)