SCHEMA COMPONENTI DEL MICROSCOPIO

https://www.google.it/search?tbm=isch&q=philips+electron+microscope+nature+1953&hl=it&authuser=0#hl=it&authuser=0&tbm=isch&q=philips+electron+microscope+&imgrc=M1XEDjq-edq1PM:&spf=381