• Country/Region
  • cart   
6 Fundamental Parameters of an Imaging System
Edmund Optics Inc.

6 Fundamental Parameters of an Imaging System

This is Section 1.2 of the Imaging Resource Guide

Previous Section Previous Section Next Section Next Section
Illustration of the Fundamental Parameters of an Imaging System
Figure 1: Illustration of the Fundamental Parameters of an Imaging System

The following parameters are the most basic concepts of imaging and are important to understand when studying more advanced topics.

Field of View (FOV): The viewable area of the object under inspection. This is the portion of the object that fills the camera’s sensor.

Working Distance (WD): The distance from the front of the lens to the object under inspection.

Resolution: The minimum feature size of the object that can be distinguished by the imaging system. Learn more in Resolution.

Depth of Field (DOF): The maximum object depth that can be maintained entirely in acceptable focus. DOF is also the amount of object movement (in and out of best focus) allowable while maintaining focus. Learn more in Depth of Field and Depth of Focus.

Sensor Size: The size of a camera sensor’s active area, typically specified in the horizontal dimension. This parameter is important in determining the proper lens magnification required to obtain a desired field of view.

PMAG: The Primary Magnification of the lens is defined as the ratio between the sensor size and the FOV. Although sensor size and field of view are fundamental parameters, it is important to realize that PMAG is not.

(1)$$ \text{PMAG} = \frac{\text{Sensor Size} \left[ \text{mm} \right]}{\text{Field of View} \left[ \text{mm} \right]} $$

Note: Typically, only horizontal values are used.

Diagram of Fixed Focal Lenses
Figure 2: Diagram of Fixed Focal Lenses
Was this content useful to you?

With over 800 Imaging Lenses and 40 pages of in depth Technical Content, make Edmund Optics Your Partner in Imaging Optics.

Telecentric, fixed focal length, micro-video, fixed magnification, variable magnification, or zoom lenses available. High resolution or large format designs to cover your sensor.

Free training videos with imaging and illumination tips and tricks.

Edmund Optics can not only help you learn how to specify the right imaging optics, but can also provide you with multiple resources and products to surpass your imaging needs.

Need help finding the right product? Have questions on your application? Contact us to discuss your technical questions with our expert engineering staff.

Need a Quote? Add a stock number to begin our two-step quote process.

Edmund Optics Facebook Edmund Optics Twitter Edmund Optics YouTube Edmund Optics LinkedIn Edmund Optics Instagram


ACMAApomaThe Laser InstituteOSASPIE