Fresnel lenses are concentric circles on the front and smooth surfaces on the back, with a regular thickness of 2mm and edges as thick as the center (not convex anywhere, not convex lenses!!).
Our microscope accessories are made of high-quality materials to ensure durability and stability. Meet your various experimental needs.
We promise to provide every customer with high-quality after-sales service. If you have any questions or need help, we will serve you wholeheartedly 24 hours a day.