TYPES OF HOMOGENIZATION AND WORKING PRINCIPLE
Manikandan MM
An Ecstatic Food technologist | HACCP overview with FSMS ISO 22000 : 2018
The homogenizer principle of operation is a rather simple one: spread the laser energy, typically concentrated at the center of the beam, by scattering the beam so that it overlaps itself multiple times, creating a beam with a larger divergence angle than the original beam, but whose energy is spread more uniformly. Thus, a simple murky or rough glass can be considered a laser homogenizer, however, it will be a rather poor solution for beam homogenizing with low efficiency and will only provide a gaussian shape.
Different applications require different properties of homogenization quality and optical efficiency, and thus there is a number of approaches utilizing varying homogenization working principles, including:
and more?
领英推荐
Holo/Or offers three different types of optical homogenizers – diffractive homogenizers, microlens arrays and broadband diffusers.
Diffractive homogenizer working principle and suitable use cases
A diffractive homogenizer splits an incident laser beam that is propagated through it in quasi-random directions, and thus utilizes the interference principle to diffuse the split beams into almost any desired shape or intensity distribution, with precise angle and size in the far field or focal plane. This sort of diffuser is a quasi-periodic structure that is not sensitive to beam centration or size, as long as it is above some minimal beam diameter determined by the diffuser angle.
The diffractive diffuser is designed for a specific wavelength, and is the preferred solution in terms of unparalleled? intensity profile control, uniformity and a sharp, diffraction limited transfer region. Diffractive diffusers are not limited to symmetrical or flat distributions, and can shape light into arbitrary shapes, including multiple rectangles or different sized spots, as well as gradient intensity profiles.??