What is diffractive optical elements?

Diffractive Optical Elements (DOE) are manufactured to have microstructure patterns that alter and control the phase of transmitted laser light. By altering the microstructures, it is possible for a diffractive optical element to produce almost any beam intensity profile or beam shape to meet application requirements.

Do optics do diffractive?

DO (diffractive optics) lens elements enable telephoto lenses to be lighter and more compact while maintaining a high level of performance. Canon succeeded in creating the innovative DO lenses by bonding a precise diffraction grating to the surface of a glass lens.

What is a diffractive surface?

A: The Diffractive lens has a thin structure of rings on its surface, with different each ring having a tooth-like profile. Light going through the rings is delayed in a proportion to the height along the radius, creating a radial phase profile that is identical to that of a regular lens.

How do diffractive optical elements work?

You use diffractive diffusers from Jenoptik to absorb a monochromatic laser beam and scatter the light into any imaginable pattern. The optical elements achieve a uniformity of 3 to 5%, whereby the shape of the light distribution can be round, rectangular or freely selectable.

Are there any diffractive optics in a Canon camera?

Canon currently produces two lenses that contain diffractive optics: the EF 400mm/f/4 DO IS USM and EF 70-300mm/f4.5-5.6 DO IS USM. Diffractive optics are made up of two or three glass elements, each of which has been coated on both sides with diffractive coatings, and bonded together into a single, multilayer DO element.

What does a third generation Canon lens mean?

This indicates a third-generation version of a particular lens. This designation, which is currently only applied to a couple of the company’s lenses, is used to describe a lens that makes use of a Diffractive Optical element.

Can a lens be more than the sum of its parts?

But even in its most basic form, a camera lens is far more complex than it might appear. A lens is more than the sum of its parts. When you attach a lens to a camera, your choice of lens is very much like a painter’s choice of brush.

What are the different types of Canon lenses?

Singles are followed by “doublets,” which are made up of two co-joined elements, followed by “double types,” which contain two unattached lens elements, and “triplets,” which contain three individual elements in a convex/concave/convex sequence.