Dear all,
Thank you for all your helpful replies!
By chance I found a green laser pointer which can produce an arrow at
microfiberproducts (it seems to be the same laser pointer as this
here which is sold out).
I got the laser pointer already and tested it.
Well, it is nice but it is not bright enough as you can see from attached picture (that is perhaps the reason why you cannot get such a laser pointer in a lower class/with less power – nobody could see the arrow anymore).
On this picture you can see also the arrow which I produce with a LED pointer (left side: LED pointer; right side: laser pointer; distance camera to wall is about 6 m/19.6 feet).
My LED pointer is not bad, but it is by far too big and heavy (32 cm/12.6 inches long and about 1 kg/2.2 pounds). The LED pointer is also connected with a wire to a plug so that users are not really mobile when they use it.
Attached you can see some pictures of my LED pointer.
Side view:
Front view; a lens creates the image of the arrow:
The arrow of this LED pointer is really nice and useful because one can better indicate something with it than with the dot of a laser pointer.
But this LED pointer is really not nice, as you can see from my pictures.
So, I hope somebody of you knows a laser pointer or LED pointer with is better than the laserpointer I bought and with which I can replace my old LED pointer.