focal length
focal length
When an electron passes parallel to the optical axis of a lens, the electron intersects with the optical axis at the back focal plane. The "focal length" is the distance from the center of the lens to the focal plane along the optical axis. The focal length of the objective lens ranges 0.5 to 4 mm depending on the target of observation.
Term(s) with "focal length" in the description
Are you a medical professional or personnel engaged in medical care?
No
Please be reminded that these pages are not intended to provide the general public with information about the products.
