What is Comparison Microscope

2024-05-23

What is Comparison Microscope?

Comparison Microscope, also known as Forensic Microscope. A comparison microscope consists of two separate microscope heads, each with its own viewing eyepiece, objective lens, and light source. The two heads are connected by a bridge, which allows the specimens to be viewed side-by-side in the same field of view. The two specimens are usually placed on separate stages, which can be adjusted independently to allow for precise comparison. It is an important instrument mainly used in forensic labs, security printing works, banks, industry quality control dept., for comparison investigation of bullets & cartridges case, tool marks, currency, coins, banknotes, documents, stamps, seals, fingerprint, fiber, and more small evidence.

In the comparison microscope, the most important part is optical bridge. As shown in the picture below, it can bring two separate optical light paths into one view field, combining two images into one view field, enabling users to view both objects at the same real time, under same magnification, similar illumination conditions.

comparison microscope work with Cartridge clamp

Through the two separate optical systems of the instrument, you can view the individual full left or full right object, or compare the two objects in split-image and overlapping image, in the same view field, to find out the micro difference between them.

Modern technologies have made many improvements to the basic comparison microscope. We also supply professional comparison image analysis software, and digital cameras, LCD screens, which can show real time images to all people for teaching or demostration. With digital cameras and professional crime image analysis software, it can provide multiple functions for comparing images on a computer.

Comparison microscope is important in law enforcement, in the fields of criminal forensics and ballistics analysis. It allows bullets and bullet fragments as well as other forensic evidence to be compared with each other, which can be used to prove guilt or to exonerate a suspect in some crimes. The instrument is mainly used in forensic labs, security printing works, banks, industry quality control dept, for comparison investigation of bullets & cartridges case, tool marks, currency, coins, banknotes, documents, stamps, seals, fingerprint, fiber, and more small evidence.

what is a comparison microscope used for

Comparison microscopes are often used to compare two bullets or other small projectiles to determine if they were fired from the same firearm. They can also be used to compare fibers, hairs, and other materials to determine if they came from the same source. In forensic science, comparison microscopes are an important tool for identifying and linking evidence to specific individuals or sources.

In addition to forensic science, comparison microscopes are also used in a variety of other fields, including materials science, geology, and archaeology. They can be used to compare the properties and characteristics of two different samples, providing valuable insights into their origins and behavior.

How to Select OPTO-EDU Comparison Microscope?

Opto-Edu's Comparison Microscope

As the most professional comparison microscope manufacture in China, we provide different levels models for our client’s choices. In Opto-Edu, we specify the comparison microscope as A18 series.

Basic Entry Level Comparison Microscope

The following models are suitable to be used for forensic science education & school, to give an idea and training to the students about what a forensic comparison microscope is and learn how to use it. It is a simple turret stereo microscope system, but includes full comparison system function, with steady quality at a very competitive price.

A18.1825 Comparison Microscope, Step Zoom, 3.2~192x
● Step Zoom Lens Optical Magnification Up To 3.2x~192x
● Left/Right, Split, Overlapping Image For Forensic Comparison View
● Halogen 50W, LED 5W, Polarizing, Coaxial, UV Light Source
● Separation Line Adjust & Magnification Correcting System
● Square & Round Working Stage Joint Moving Up/Down
● Touch Panel Switch to Control Halogen & LED Light Source On/Off Separately or Together
● Full Range Light Source Accessories Included, Coaxial Light, Polarizing Light, Ultraviolet Lens, Red/Blue/Green/Yellow Filters

A18.1825-LCD Comparison Microscope, Step Zoom, 3.2~192x
● 9.7'' LCD Pad Digital Camera, Android System,
● Total Magnification 3.2x~192x
● Wide Field Eyepiece WF10x/22mm, WF20x/12mm, High Eyepoint
● 5 Step Zoom Plan Objective 0.8x, 1.25x, 2x, 3.2x, 4.8x
● Full left/right, split-image or overlapping image comparison
● Magnification Correcting System, with Correcting Lens
● Separation Line Adjusting System, with Special Designed Metal Adjust Driver
● 12V50W Fan Cooling Strong Halogen Light, Brightness Adjustable
● 5W LED Cold Light, High Brightness, Brightness Adjustable
● Touch Panel Switch to Control Halogen & LED Light Source On/Off Separately or Together
● Full Range Light Source Accessories Included, Coaxial Light, Polarizing Light, Ultraviolet Lens, Red/Blue/Green/Yellow Filters

Middle Level Comparison Microscope

The following models are suitable to be used for forensic science labs, the optical magnification up to more than 200x, with 2 sets of 6 holes nosepiece, and with advanced long working distance infinity plan achromatic objectives. It can provide better image quality, and all kinds of light sources.

A18.1828 Comparison Microscope, 2~240x
● Total Optical Magnification Up To 2x~240x With 6 Holes Nosepiece
● Left/Right, Split, Overlapping Image For Forensic Comparison View
● Halogen 50W, LED 5W, Polarizing, Coaxial, UV Light Source
● Separation Line Adjust & Magnification Correcting System
● Square & Round Working Stage Joint Moving Up/Down
● Touch Panel Switch to Control Halogen & LED Light Source On/Off Separately or Together
● Full Range Light Source Accessories Included, Coaxial Light, Polarizing Light, Ultraviolet Lens, Red/Blue/Green/Yellow Filters

A18.1828-LCD LCD Digital Comparison Microscope, 2~240x
● 9.7'' LCD Pad Digital Camera, Android System,
● Total Optical Magnification Up To 2x~240x With 6 Holes Nosepiece
● Left/Right, Split, Overlapping Image For Forensic Comparison View
● Halogen 50W, LED 5W, Polarizing, Coaxial, UV Light Source
● Separation Line Adjust & Magnification Correcting System
● Square & Round Working Stage Joint Moving Up/Down
● Touch Panel Switch to Control Halogen & LED Light Source On/Off Separately or Together
● Full Range Light Source Accessories Included, Coaxial Light, Polarizing Light, Ultraviolet Lens, Red/Blue/Green/Yellow Filters

A18.1831 Digital Comparison Microscope, 3.2~288x
● Step Zoom Lens Optical Magnification Up To 3.2x~288x
● Left/Right, Split, Overlapping Image for Forensic Comparison View
● Halogen 50W, LED 5W, Polarizing, Coaxial, UV Light Source
● Separation Line Adjust & Magnification Correcting System
● Square & Round Working Stage Joint Moving Up/Down
● 3.0M Digital Camera, Built-in CCD digital camera
● Touch Type Function Panel, User-Friendly Design, Easy to Operate

High Level Motorized Comparison Microscope:

Motorized digital microscope comparison, is suitable to be used for forensic science laboratory research work, for compare all kinds of bullets, cartridge cases, cutting objects, paper documents and etc. It can be fully controlled by manual or computer software. Built-in high resolution digital color camera can output real time image and video to computer, under professional crime image analysis software, it will be ideal tools for forensic scientist’s research work. With full comparison system function, and with steady quality at very competitive price.

A18.1829 Motorized Digital Forensic Comparison Microscope
● Total Magnification 2x~240x With 6 Holes Nosepiece
● Left/Right, Split, Overlapping Image For Forensic Comparison View
● Halogen 50W, LED 5W, Polarizing, Coaxial, UV Light Source
● Separation Line Adjust & Magnification Correcting System
● Motorized Square & Round Working Stage Joint Moving Up/Down
● Built-in 3.0M High Resolution Color CCD Camera, USB 2.0 Output
● Professional forensic image analysis software

A18.1830 Motorized Digital Forensic Comparison Microscope, with Motorized Working Table
● Total Magnification 2x~240x with 6 Holes Nosepiece
● Left/Right, Split, Overlapping Image for Forensic Comparison View
● Halogen 50W, LED 5W, Polarizing, Coaxial, UV Light Source
● Separation Line Adjust & Magnification Correcting System
● Motorized Square & Round Working Stage Joint Moving Up/Down
● Professional forensic image analysis software
● Motorized Working Table included

A18.1816-A Questioned Document Examination System
● Magnification 1~30x Motorized Zoom Control
● Transmit & Reflect All Kinds Light Source
● Exciting Filter 9 Bands, Receiving Filter 9 Bands
● Incl. Software+Laptop, Wooden Packing
● SIZE: 100x69x78cm, 76kg

A18.1818 Questioned Document Examination System
● Magnification 1~30x Motorized Zoom Control
● Transmit & Reflect All Kinds Light Source
● Exciting Filter 7 Bands, Receiving Filter 7 Bands
● Incl. Software+Laptop, Wooden Packing
● SIZE: 80x60x70cm, 50kg

Relative Forensic Products

In addition to comparison microscope, we can also provide a variety of relative forensic products.

A30.1821 Professional Forensic Analysis Software
It can use with most of OPTO-EDU comparison microscope models. The software is with multiple professional functions, such as measurement, adjusting image color and light, image conversion, image analysis, image search and comparison, etc.

A30.1801 Professional Forensic Analysis Software

A30.1801 Professional Forensic Analysis Software effect

What is a comparison microscope used for the examination of?

A comparison microscope, or microscope comparator, is a vital tool in forensic science, particularly for ballistics. Initially developed by Philip O. Greville, it was Calvin Goddard who refined and popularized it.

What is a comparison microscope used for the examination of?

2024-12-10