  We present data for a sample of 45 spiral galaxies over a range of Hubble
types, imaged in the near-IR J and K bands. Parameters are calculated
describing the bulge, disk and bar K-band light distributions, and we look for
correlations showing the interrelation between these components.
  We find that bulge profiles are not well-fitted by the classic de Vaucouleurs
profile, and that exponential or R^1/2 fits are preferred. Bulge-to-disk ratio
correlates only weakly with Hubble type. Many of the galaxies show central
reddening of their J-K colours, which we interpret as due to nuclear starbursts
or dusty AGN.
  We define a new method for measuring the strength of bars, which we call
Equivalent Angle. We stress that this is better than the traditional
bar-interbar contrast, as it is not subject to seeing and resolution effects.
  Bars are found in 40 of the 45 galaxies, 9 of which had been previously
classified as unbarred. Bar strengths are found not to correlate with disk
surface brightness or the presence of near neighbours, but a tendency is found
for the most strongly barred galaxies to lie within a restricted, intermediate
range of bulge-to-disk ratio. Bar light profiles are found to be either flat or
exponentially decreasing along their long axes, with profile type not
correlating strongly with Hubble type. Bar short axis profiles are
significantly asymmetric, with the steeper profile being generally on the
leading edge, assuming trailing arms. In the K-band we find bars with higher
axial ratios than have been found previously in optical studies.
