Today, aspheric elements are not only used in high-end applications such as lithography, astronomy, and space-borne optical devices. They are also widely utilized in industrial optical devices such as sensors, machine-vision systems, and even consumer-optical products. However, although aspheric technology is becoming more and more accepted and implemented, there is still a lot that needs to be learned and done in order to exhaust its full potential. Therefore, we decided to dedicate this issue of AOT to aspheric technology: from design to manufacturing and metrology.
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