Sens lentille bombée

Hello
what is the common sense of a curved lens on both sides?
view the photo
thank you
1 or 2senslentille

The number one position is correct.

thank you
I was wondering if I was right because I received the machine as Figure 2

Hello
So it’s been more than 2 days that I try to adjust the laser alignment and the famous domed lens on one side and hollow at the other as well as possible when I received the machine. I returned and put 16 mm focal length at the nose of the laser but I find that its cut better when the hollow is above why?

Bonjour
Cela fait donc plus de 2 jours que j’essaie d’ajuster l’alignement laser et la fameuse lentille bombée d’un côté et creux de l’autre aussi bien que possible lorsque j’ai reçu la machine. Je suis revenu et j’ai mis 16 mm de focale au nez du laser mais je trouve que sa coupe est meilleure quand le creux est au dessus pourquoi?

case 1 cut not through
case 2 cut ok

Hello
I must have a negative meniscus

The focal distance will need to be measured for each position of the lens, and will likely differ.

Hello
my lens had the hollow laser dimension with a focal length at the nose of 16 mm if I return the lens will you cut the same and the focal length will also change?

I’m sorry, but I don’t understand what you are asking here.

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