Does a convex lens converge or diverge rays in Fraunhofer diffraction setup?

[Prashasti]

Homework Statement

A monochromatic source of light 'S' is placed at the principal focus of a convex lens 'L1'. A parallel beam of light or a plane wave front is incident on the narrow slit represented by AB (its width - 'a')

Homework Equations

So, what my teacher did was,
She showed diffraction of the light rays as they pass through the slit.
And then she made the rays to meet at a point 'P'.
Look at the image. Doesn't the convex lens L₂ seem to be actually 'diverging' the rays? Shouldn't it 'converge' them?
I'm literally confused about it, because all the books seem to support my teacher.

 

[dlgoff]

Doesn't the convex lens L2 seem to be actually 'diverging' the rays? Shouldn't it 'converge' them?

Looks like it's converging to me. In this image, the left lens is converging and the right lens is diverging.

Image compliments of http://hyperphysics.phy-astr.gsu.edu/hbase/geoopt/foclen.html

 

[Jilang]

Yes the parallel rays are converging. They were parallel and are now drawing together.

 

[Prashasti]

Does it mean why my teacher did was wrong?

 

[Prashasti]

Yes the parallel rays are converging. They were parallel and are now drawing together.

I 'm talking about the second lens...