Imaging Resource Guide Section 1.2: 5 Fundamental Parameters of an Imaging Systemįield of View (FOV): The viewable area of the object under inspection. Since most lenses come in discreet focal lengths and the field of view is often a fixed requirement, having flexibility in working distance can be beneficial. Spacer rings can be added to decrease the minimum working distance in fixed focal length lenses at the expense of light collection and resolution. Oftentimes imaging lenses will have a minimum working distance (or sometimes called a minimum object distance) and can focus at this distance or any distance longer. Fixed focal length imaging lenses have a range of working distances they are specified to work over. The lens focal length and sensor size create a constant angular field of view and the working distance creates a physical field of view. Working Distance (WD): The physical distance between front of the imaging lens and the object being imaged. Imaging Resource Guide Section 2.2: Object Space Resolution. Imaging Resource Guide Section 2.1: Resolution. Putting this value into the calculator will return an object space resolution based on the pixel size and the calculated Primary Magnification (PMAG). Pixel size should be listed in a camera’s specifications and typically runs between 2 – 10um per pixel. 
The size of the individual pixels on a camera sensor, along with the quality of the lens and the primary magnification will determine the smallest detail that can be seen in the image. Pixel Size: The pixel size by itself does not control the FOV seen by a camera but has a large effect how the image will ultimately look.
#RANGE RESOLUTION CALCULATOR UPDATE#
This field will automatically update based on the sensor format selected in the drop down menu but can be further customized based on the exact sensor dimensions in your camera. Sensor Dimensions: The physical dimensions of the active area of the sensor. A maximum sensor format is often listed in a lens’s specifications and should be kept in mind when both choosing a lens and a camera.
It is important to remember that not every imaging lens will be able to cover all sensor sizes. Keeping all other parameters constant while increasing or decreasing the camera sensor format will increase or decrease your FOV, respectively. Sensor format is a fundamental parameter of an imaging system and can be found in the specifications of any camera on the Edmund Optics website. Sensor Format: The sensor format drop down menu allows one to quickly choose from common camera sensor formats.
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