L’occhiale all’occhio (1660), Primary Source for 17th Century Lens Grinding Techniques

Carlo Antonio Manzini, astronomer and designer of lens-grinding Machines, wrote his L’occhiale all’occhio as a comprehensive guide to the state of the art of lens-grinding in 17th century Italy. Importantly its woodcut diagrams are the earliest we have of these devices. The details of the work in terms of practical techniques was meant to alleviate the secrecy of [...]