The comparison microscope is the mainstay of forensic science allowing two objects or samples to be compared side by side.
While the primary use of this type of instrument is criminology as in ballistics, other scientific fields including paleontology and archaeology utilize these special compound microscopes.
Comparison scopes are two compound light microscopes that sit side by side and allow the user to view both specimens through a center eyepiece that displays both images.
Compound microscopes are microscopes that use multiple lenses to magnify an image for study.
The images from the comparison instrument can also be transferred to a computer monitor, television screen or sent via the Internet to a remote computer.
The ability to view two samples simultaneously allows them to be meticulously compared to see if they are identical or different.
The primary use of these types of dual microscopes is in forensics, a discipline that uses science and technology to help solve crimes by providing factual evidence and linking crime scene evidence to a suspect or location.
Tools create specific marks, bullets have signature marks, hair can be human or animal and using two compound microscopes to study a known sample against a collected piece of evidence can confirm an objects origin.
Having multiple eyepieces, image magnifications ranging from 6x to 400x depending on the microscope model and image viewing options including left or right views only, side by side views of both samples and superimposed viewing places one image on top of the other for comparison.
A number of forensic microscope companies use components from the primary microscope providers, including Leica, Zeiss and Olympus. Leeds Forensic Systems offers a number of systems that use Olympus and Leica optical components.
Comparison microscopes are available from major manufacturers on Ebay! You'll be surprised what you can find and at what price.
If not from Ebay, Amazon.com offer comparison microscopes that are well priced and are solidly built by good manufacturers. See below and follow the links.
Using a comparison microscope provides factual evidence that can help solve crimes, pinpoint historic dates and confirm signatures.
Before this instrument was designed, people used their eyes for sample comparison studies, these types of compound light microscopes provide the tool to accurately confirm if two samples are identical.
Interesting read: Forensic Pathology.
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A mechanical stage of a microscope refers to the mechanism that has been mounted on the stage for precise movement of the specimen on the microscope slide through the field of view.