Laser Beam Diffuser

Since energy density is energy divided by cross sectional area we can lower the energy density without touching the energy simply by increasing the beam size.

Laser beam diffuser.

The energy distribution from these diffusers closely approximates a flat top distribution across the specified range of angles. This phenomenon called specular reflection occurs because the surface of the material is not. The diffusers have low sensitivity to laser beams. Large angle diffusers produce the greatest degree of homogenized light.

Optical diffusers are also known as light diffusers in many illumination applications. Diffusers are available in both circular and elliptical beam patterns. Therefore they are often used with monochromatic and less stable lasers. Optical diffusers are also ideal for use as screens or targets in imaging applications.

Okay so diffusers are good. Diffusers homogenizers diffusers or homogenizers are diffractive elements that can evenly diffuse a laser beam into an accurate beam with an homogenized intensity and a controlled angle. Optical diffusers cause light to spread evenly across a surface minimizing or removing high intensity bright spots. A laser energy sensor with a diffuser.

Engineered diffuser technology thorlabs and rpc photonics engineered diffusers provide advanced beam shaping that leads to significant performance enhancements for applications as diverse as lithographic systems outdoor lighting displays backlighting display brightness enhancement and projection screens. However the degree and detailed characteristics of diffusion can differ substantially between different devices. It diffracts the beam and then scrambles it onto itself to achieve a highly homogenous speckle free beam. The diffractive diffuser can be designed to any desired spot shape and size including free form spot shapes with controlled energy distribution within the spot for example a bat wing distribution a.

The diffractive diffuser is best used in laser systems with low coherence laser beams. For example if a highly spatially coherent laser beam hits a diffuser the light emerging from the diffuser may no longer have the characteristics of a beam but rather propagate in a wide range of directions.