reflectoscope
/rɪˈflɛktəskəʊp/noun
1A device which projects an image of an object on to a screen by reflecting light from it. Now rare.
2Chiefly Metallurgy. An instrument for investigating the internal structure of opaque objects by transmitting ultrasound into them and analysing its reflection.
Origin
Early 20th century; earliest use found in The Boston Globe. From reflect + -o- + -scope.