1
Jul.
31, 2025
Large aspherical mirror testing with CGH and auxiliary lenses
A method combining CGH (computer-generated hologram) and auxiliary lens to realize zero-position compensation interferometry through hybrid compensation measurement can solve the problem of high-precision surface detection of large-aperture and long-focal length optical reflectors.
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2
Jul.
31, 2025
Definition of Optical Freeform Surfaces
According to the definition of freeform surfaces, a freeform surface is one that does not possess axial rotational symmetry or translational symmetry constraints.Therefore, one significant characteristic of freeform surfaces is their asymmetry; they are not symmetric with respect to any rotational axis, nor symmetric with respect to any cross-section.
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