Why Cylindrical Lens Is Used?

A cylindrical lens is typically used to focus, condense or expand incoming light. A cylindrical lens has one cylindrical surface, causing light to be focussed in a single dimension or axis. It can also be used to expand the output of a laser diode into a symmetrical beam.

Why do we use cylindrical lens?

Cylindrical lenses are used to focus or expand light in a variety of laser and light-based equipment for applications, such as laser scanning optical metrology systems, laser alignment and inspection tools, and laser additive manufacturing and laser processing equipment.

Why are cylindrical lenses used to correct astigmatism?

In order to correct astigmatism, we must use a cylindrical lens. This enables us to focus light on the retina in both meridians.