Open Access
Fig. 2
Download original image
MISTRAL optical scheme: (1) Focal reducer, (2) field lens −128 mm (with the slit a few mm before), (3) achromat collima-tor f = 200 mm, (4) filter wheel, (5) VPH 600 tr/mm with two prisms 19,8° (blue)/25,6º (red), and (6) 100 mm lens.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.