The dioptrics of refractive dials in the sixteenth century / Sven Dupré.
Abstract:
This article discusses a particular type of optical instruments, refractive dials, made in the sixteenth century, by placing them in the context of contemporary optical knowledge. First, the properties of refractive sundials and their introduction in the sixteenth century by the German instrument-maker George Hartmann will be discussed. Second, it will be shown how these refractive dials were constructed in the sixteenth century. From an analysis of the notes of Ettore Ausonio, this article argues that the procedure to make refractive dials used by instrument-designers in the sixteenth century was based on contemporary knowledge of refraction
Nuncius A. 18, fasc. 1 (2003), p. 39-67