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A comparison microscope uses an optical bridge to view two samples simultaneously. It is important in forensics and ballistics analysis, allowing for the comparison of evidence. It has revolutionized many scientific disciplines and modern technologies have improved its capabilities.
A comparison microscope consists of two separate microscopes connected to each other and is used to compare two objects or samples. A type of device called an optical bridge allows the user to view both samples simultaneously. This type of microscope is important in law enforcement, forensics, and ballistics analysis fields. It allows bullets and shrapnel to be compared to each other, as well as other forensic evidence, which can be used to prove guilt or to clear a suspect in some crimes.
The microscope is one of the most important inventions in human history. It has enabled the advancement of many sciences and has revolutionized many of our ideas about almost all of the physical sciences and has even fomented the creation of new sciences. The idea of combining two microscopes to allow two specimens to be studied simultaneously was just an extension of the already well-developed technologies used to build standard microscopes. The optical bridge of an early comparison microscope was nothing more than two pairs of mirrors, one for each microscope, which directed individual images into a single viewer, producing a side-by-side view of both specimens in a single image.
The invention of this new type of microscope led to the advancement of many scientific disciplines, especially ballistics and forensic medicine. The ability to examine and compare two samples side by side made it possible to positively determine whether two shells had been fired from a different pistol or pistols. Using a test fired bullet as a check, it also made it possible to determine whether a particular bullet was fired from a certain gun or not.
Many other uses for the forensic comparison microscope followed his invention. Samples of almost any material can be compared to establish transfer or trace evidence. Even hair samples and fingerprints can be compared this way. You can also compare handwriting samples and biological samples, such as bacteria and algae. Tool marks can be compared to identify which tools were used on an item or to match a reference tool to one known to have been used in a crime.
Modern technologies have brought many improvements to the basic comparison microscope. Computers and fiber optics allow images to be displayed on monitors or projection screens and superimposed on top of each other. Many options, such as illumination, magnification rates, and the ability to take sample comparison photographs, may be available in a comparison microscope.
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