Related Experiment Video
Updated: Jan 24, 2026

Major Components of the Light Microscope
Published on: July 30, 2008
Three-component zoom lens with fixed position of optical center
Abstract:
A method is proposed for calculation of initial parameters of a three-element zoom lens with an identical position of object and image principal planes of the optical system and approximately zero Petzval sum. Such an optical system has a fixed position of its optical center, which does not depend on object distance. The proposed method makes it possible to determine focal length values of individual elements and trajectories of their movements during zooming. The analysis is presented on examples of the calculation of parameters of such optical systems. These systems could be useful in optical measuring methods, photogrammetry, and machine vision techniques.
Related Concept Videos
Lattice Centering and Coordination Number
Types of Unit Cells
Imagine taking a large number of identical...
Center of Gravity
Center of Gravity
To determine its location, the principle of moments can be utilized by dividing the object into...
Center of Mass
The knowledge of the center of mass can also help us to describe and predict the motion of objects. For example, when a ball is thrown...
Fixed Action Patterns
Components of Stress
Interestingly, the hidden cube faces also experience these stresses, equal and...

