scotoscope
/ˈskəʊtə(ʊ)skəʊp/noun
1 Microscopy. An instrument which illuminates an object so that it can be more easily viewed with a microscope, comprising a glass globe filled with brine for concentrating light from a lamp, a convex lens being used to focus this light on the object. Now historical.
2A telescope incorporating an image intensifier, allowing use in dark conditions. rare.
Origin
Mid 17th century; earliest use found in Samuel Pepys (1633–1703), naval official and diarist. From scoto- + -scope.