Optical components such as Fresnel lenses and aspheres with diffractive surface structures pose unique challenges for metrology. Their complex geometries often cannot be accurately measured using conventional interferometric or tactile methods. This is where DIOPTIC excels: we design computer-generated holograms (CGHs) precisely tailored to these diffractive surfaces, enabling highly accurate form measurements even for the most complex structures.
Applications of Diffractive Aspheres
Aspheres with diffractive structures are used across a broad spectrum of high-tech applications, from advanced imaging and microscopy to laser beam shaping and space optics. Their key advantage lies in combining a compact form factor with high optical functionality. In miniaturized systems, or in wavelength ranges where conventional optical elements reach their limits, diffractive components often provide the optimal solution. Although advanced manufacturing techniques have made fabrication highly controlled, precise form testing remains a significant challenge.
Customized CGHs for Interferometric Precision
DIOPTIC develops CGHs specifically matched to the topography of each diffractive optic. For form testing, the CGH is designed with the exact number of zones as the lens under inspection. Zone step heights are measured to interferometric accuracy. Our deep expertise in both CGH design and fabrication ensures reliable testing of even the most complex surface structures, guaranteeing the highest level of optical precision.
Explore Our Capabilities: Discover how DIOPTIC’s computer-generated holograms enable ultra-precise testing of advanced diffractive optics. Visit our product page for detailed information on applications, services, and technical specifications.
