Related Experiment Video
Updated: Feb 20, 2026

Simulating the Mechanics of Lens Accommodation via a Manual Lens Stretcher
Published on: February 23, 2018
Method of first-order analysis of a three-element two-conjugate zoom lens
Abstract:
A method is described for the first-order analysis of a two-conjugate zoom lens composed of three movable elements. Such an optical system satisfies the requirement that the object, image, and pupil planes are fixed within the change of its magnification. General formulas are derived for the calculation of parameters of a three-component two-conjugate zoom lens system, which enable us to calculate the optical power of individual optical elements and their distances for a different range of magnification and imposed conditions. The application of derived formulas is presented on three examples of optical systems with different parameters.
Related Concept Videos
Focusing of Light in the Eye
Three-Dimensional Force System:Problem Solving
To solve a three-dimensional force system, first resolve each force into its respective scalar components. Do this using...
Imaging Biological Samples with Optical Microscopy
In optical microscopy, the specimen to be viewed is placed on a glass slide and clipped on the stage...
Two-Dimensional Force System: Problem Solving
The first step to solving a two-dimensional force system problem is to draw a free-body diagram of the object under consideration. This diagram helps identify all the external forces acting on the object, including their...
Relative Motion Analysis using Rotating Axes - Acceleration
Time differentiation is...
Rotation with Constant Angular Acceleration - II
The first...

