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Vision Engineering Microscopes

Microscopes magnify objects too small to see with the naked eye. While there are several types of microscopes, our focus at TEquipment is on optical microscopes and fiber optic scopes. Fiber optic scopes are discussed in our Fiber Optic equipment section. Optical microscopes are the oldest and most common. They contain one or more lenses to enlarge the target sample. While microscopes have been around for hundreds of years, it is modern day sample lighting techniques that have helped generate the better quality seen today.

How to Choose a Microscope and Common Optical Microscope Terminology

Consider the Microscope Type
  • Single Lens Microscopes use only one magnification lens. Illuminated Magnifiers fall into this category.
  • Compound Microscopes use multiple lenses and a separate set to focus the light into the eye. Specimens are Illuminated from underneath. Compound microscopes are considered high power.
  • Stereo Microscopes or Dissecting Microscopes, as the name implies, gives the viewer an erect (upright and un-reversed) stereoscopic 3D effect image. Typically using light reflected by the image instead of through it. Stereo microscopes are considered Low Power microscopes. The two main optical systems used are CMO (common main objective) or two separate optical paths (Objectives). Stereo microscopes are considered Low Power microscopes.
  • High Power vs. Low Power refers to the magnification capability of the microscope. High Power microscopes are suited for tiny subjects illuminated from underneath, such as bacteria where Low Power microscopes are used for larger objects such as a small part.
Consider the Microscope Ocular and Objective Lenses
  • Monocular and Binocular microscopes refer to one or two eyepieces, or oculars. Eyepieces compensate for residual chromatic aberrations inherent in the magnification lenses. Monocular eyepieces are on the lower end of cost, so more typically found for students, but increasingly some binocular eyepieces are available at only a marginal additional cost.  Binocular microscopes are not to be confused with stereo microscopes. The Binocular eyepieces see the same image and provide greater viewing comfort.
  • Trinocular microscopes refer to three oculars and have the ability to add a camera or video option.
  • The Objective Lens of a microscope is the one closest to the sample. It is a cylinder containing one or more lenses. Often a microscope will have more than one Objective Lens with different focal lengths (i.e. magnification) that can be rotated for use. There are two main types of objectives:
    • Achromatic. Color Correct
    • Plan Achromatic. Color corrected and Flat Field
  • Multi-Head Microscopes are equipped with multiple heads for more persons observing at the same time. Multi-Head Microscopes are mainly used in medical teaching and biological teaching or for more experts at the same time.
Consider the Microscope Lighting of the Sample
  • Tungsten is common on very low end microscopes using standard incandescent light bulbs. These light bulbs emit more heat that may affect specimens and the light itself is yellowish.
  • Fluorescent and LED lighting produces a white light with less heat. Color rendition can vary compared to sunlight. LED lighting provides longer life just the same as for room lighting.
  • Halogen is the most expensive and preferred for best color rendition when high heat is not a problem.
  • Polarized Light Microscope involves illuminating the sample with polarized light. Polarized light can improve contrast with certain samples such as rocks and minerals. Polarizing has other applications. Polarized sunglasses, for example, reduce glare. Using polarized light, the origin, content and chemical makeup of many different organic and inorganic materials may possibly be discovered.
Consider Microscope Options and Accessories
  • Microscope Stands are available in a great variety and worth considering as an accessory with purchase.
    • Boom Stands
    • Articulating Arms
    • Post Stand
    • Track Stand
  • Photography and Video options are available for trinocular microscopes. Traditional factors in personal camera and video camera selection apply such as:
    • Number of megapixels
    • Field of view
    • Zoom vs close-up

Video Inspection Systems

Video Inspection Systems are ideal for a variety of applications from general inspection to high resolution documentation. Video Inspection Systems typically have a wide field of view. They come in a variety of sizes and styles to meet a range of needs.

Borescopes are categorized separately.
Please visit Products > Borescopes / Boroscopes for our wide selection.

Video Inspection System Applications
  • Image capturing
  • Displaying specimen on a LCD screen
Video Inspection System Selection Considerations
  • Magnification
  • Resolution
  • Field of View
  • Included or optional lens for different working distances, such as close-up
  • Included or optional video storage and/or digital picture storage
  • Mounting
  • Application does not require a computer
  • Connect directly to any widescreen LCD
  • 3D images

Digital Microscopes

Digital microscopes use optics and a camera to produce a digital image on a monitor. These microscopes make observation more comfortable, and they can make research and analysis more efficient.
 
Digital microscopes are used to capture images and study items in a variety of applications ranging from biological to forensics and more. TEquipment carries a wide selection of digital microscopes to meet a range of needs.

Digital Microscope Applications
  • Education
  • Medical
  • Metallurgical
  • Biological
  • Scientific research
  • Forensics
  • Circuit board and other industrial inspection
  • Test and inspect product assembly
Key Features of Digital Microscopes to Consider
  • Resolution
  • 2D and 3D measurement
  • Observe image on LCD screen and ocular at the same time
  • Support USB, AV, S-Video and Audio output and display real-time image on TV and PC at the same time
  • Data storage
  • Print pictures instantly without being connected to PC

 
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