Translation of "comparison microscope" into Spanish

comparison microscope is a device used to analyze side-by-side specimens; it consists of two microscopes connected by an optical bridge, which results in a split view window enabling two separate objects to be viewed simultaneously. [##W: In the 1920s forensic ballistics was waiting at its inception. In 1929, using a comparison microscope adapted for the purpose by Calvin Goddard and his partner Phillip Gravelle used similar techniques to absolve the Chicago Police Department of participation in the St. Valentine's Day Massacre.}