The focal ratio is the focal length divided by the entrance aperture diameter. It controls the cone angle of a paraxial focused beam.

Ancestors (5)

  1. Optical instrument
  2. Optics
  3. Branch of physics
  4. Physics
  5. Home

Incoming links (3)

View article source

Discussion (0)

New discussion

There are no discussions about this article yet.

Articles by others on the same topic (0)

There are currently no matching articles.
See all articles in the same topic Create my own version