Modern microscopy; a handbook for beginners and students (1912)
Cross, M. I, Cole, Martin J · Chicago, Chicago Medical Book Co. · leaf 255
tepsmust be interposed in the path of the light rays proceeding fromthe objective to form the image in the eyepiece, whilst in thecase of the quartz wedge quite an appreciable fraction of thetotal length must be interposed. Further, in the latter case,the retardation scale cannot be used since it… … Fig. 75.—The Action of a Convergent System. quartz wedge, of the black band on the retardation scale whenthe fast direction of the wedge is superposed on the slow direc-tion of the section. In the case of the mica-step the retardationmay be equal to that of an integral number of steps, but…
Microscopy
Internet Archive · Public Domain Mark 1.0. Free to use for anything.
![An illustration from L'optique divisée en trois livres : ou, l'On démontre d'une maniere aisée tout ce qui regarde 1. la propagation & les proprietez de la lumiere. 2. La vision. 3. La figure & la disposition des verres qui servent à la perfefectionner [sic] (1682)](https://img.insideoutlibrary.com/img/200/ia-loptiquedivise00ango-376-43.webp)
