What are the standard ZnSe focus lenses available from Yutai Optics?

Items	Material	Diameter(mm）	FL(mm）	Coating
Focus lens	Laser Grade CVD ZnSe	12	25.4/38.1/50.8/ 63.5/ 76.2/ 101.6/127	AR,T≥99.5%@10.6um
Focus lens	Laser Grade CVD ZnSe	18/19/20	38.1/50.8/ 63.5/ 76.2/ 101.6/127	AR,T≥99.5%@10.6um
Focus lens	Laser Grade CVD ZnSe	25	38.1/50.8/ 63.5/ 76.2/ 101.6/127	AR,T≥99.5%@10.6um
Focus lens	Laser Grade CVD ZnSe	38.1	127/190.5	AR,T≥99.5%@10.6um
Focus lens	Laser Grade CVD ZnSe	50.8	190.5	AR,T≥99.5%@10.6um

What are the precautions to be taken when installing a ZnSe focus lens?
1. Focus lens is installed with the convex side facing up.
2. After replacing the lens, you need to fine-tune the lens barrel up and down.
3. Fixed in the best cutting effect position.

Highly Recommended ZnSe from Yutai Optics:
ZnSe Blanks
IR ZnSe(Zinc Selenide)
Customized ZnSe Focus Lens
Laser Grade ZnSe Windows
ZnSe Windows with 10.6um AR Coating