532nm Rectangular Flat-Top Beam Shaping Diffractive Optical Element (DOE)
532nm Rectangular Flat-Top Beam Shaping Diffractive Optical Element (DOE)
The surface microstructures of a diffractive optical element alter the transmission phase of the incoming wavefront, which in turn imposes phase modulation on the incident light. As a consequence, the beam is split into multiple distinct diffraction orders. By adjusting the weighting of these orders and the distance to the observation plane, one can produce constructive interference at a selected location—commonly at infinity or at the focal plane of a lens—thereby generating the required irradiance pattern.
This DOE is purpose‑built for 532 nm green laser systems, converting a standard Gaussian input into a rectangular flat‑top profile measuring 380 µm × 150 µm, with sharp edge transitions and uniform intensity distribution.
Its 16‑level phase structure delivers a total diffraction efficiency exceeding 90% and an energy uniformity better than 90% RMS, effectively suppressing hot spots and minimizing thermal damage in precision processing applications.
The device is housed in a Φ25.4 mm (1‑inch) outer diameter package with a Φ15 mm clear aperture, facilitating straightforward integration into most optical mounts and filter wheel assemblies.
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