In honor of HOLO/OR’s 30th anniversary, we decided to debunk a few myths and confirm some truths about our Diffractive Optical Elements. Become an informed consumer, and discover the truth here.
We hope this will help reassuring potential customers and provide more information about our unique products.
Diffractive Optics - Myth or Fact?
“Diffractive Optical Elements can only be used with very narrow bandwidth lasers”
Most DOEs can be used with a bandwidth of +/-2% around the design wavelength, with no degradation in their functional performance.
Some can be tailored to work with broader spectral range or harmonies of the same laser.
“Diffractive Optical Elements can only be used with Single-Mode lasers”
We have several categories of Diffractive Optical Elements, some are design for a SM laser beam and some are designed for a MM laser beam.
“It is impossible to eliminate zero-order in Diffractive Optical Elements”
Holo/Or has improved its capabilities in eliminating and controlling zero-order, and is constantly introducing improved designs.
“Diffractive Optical Elements are higher cost compared to refractive optics.”
In many cases, a single DOE can replace a complex optical module or reduce the need for costly large NA optics and thus offer a more cost effective solution.
Moreover, Holo/Or manufactures on large wafers using cutting-edge technology, thus offering attractive prices for volume DOE.
“Diffractive Optical Elements have absolute angular tolerance”
Thanks to the DOE production methods which are similar to those implemented in semiconductors manufacturing – DOEs enjoy angular tolerances under 10-6 of the design angle.
“Diffractive Optical Elements can withstand high power”
Our DOE are made of Fused Silica and Zinc Selenide, which are optimal for high power laser systems and have high laser damage threshold. Read more here.
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