11 Apr 2007 HoloOr has launched a new "Dual Wavelength" diffractive optical element (DOE) component. HoloOr has launched a new "Dual Wavelength" diffractive optical element (DOE) component, which corrects for chromatic aberrations, usually associated with dual wavelength designs when typically the aberration of one wavelength is much larger than in the other wavelength.
The DOE has the general shape of a regular plano-convex lens, except the DOE pattern in placed onto plano face.
Typical applications include laser pointing in surgical equipment and industrial laser marking and cutting systems. Without ‘dual wavelength’ correction the beam of each wavelength will be focussed in a different focal plane, causing unwanted cutting and marking, or undefined edges.
The DOE DW-0.75-20 DOE, for example, measures ؾ" and has a focal length of 20mm for both 633nm and 10.6µm wavelengths.
Other features include:
•High Transmission Efficiency (~99%)
•High Design Efficiency (~99% for the IR and ~75% in the red)
•High Damage Threshold
•Suits single mode and multi-mode lasers
•Very tolerant input beam quality
•Ar/Ar coated for both 633nm and 10.6µm
•Substrate is ZnSe
•Optional Ø20mm
HoloOr can offer similar elements at other diameters and focal lengths.
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