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Digital Microscopes
  

Factors That Effect Quality
The quality of an optical system such as a lens is a crucial factor in microscopes for accurate observation.
Some indicators which signal the performance of a lens are resolution, brightness, depth-of-field, monitoring distance, aberration, and so on.
These factors are proportionately taken into consideration when microscope lenses are designed.
Resolution
A high-resolution lens allows detailed and accurate observation.
Brightness
Detailed observation cannot be performed with a lens that produces a dark image.
Depth-of-field
A lens with a large depth-of-field, allows even odd-shaped objects to be brought into focus.
Monitoring Distance
This is the distance between the object and the lens. The greater this distance, the further the degree of freedom allowed for observation.
Aberration
This refers to color smudges and distortions of an image. This can be compensated for by combining multiple lenses.
High resolution zoom lens diagram

Low Distortion Zoom Lenses
The high resolution VH-Z500 zoom lens includes a total of 24 lenses. By using a fluorite lens, color aberration is almost ideally compensated for and the lack of curvature around the lens helps to reduce the level of measurement error factors. Moreover, because the resolution and magnification have been increased at the same time, the object can be clearly observed. This lens symbolizes the quality optical techniques employed by Keyence digital microscopes.