CCD Object Size Calculator

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Common NuSpectra Camera Models
Model	CCD Size (Inches)	Focal Length (mm)	Resolution (Pixels)
Arecont Series	1/2	2.6-50	Varies
VB-C60	1/4	3.4-136	320x240, 640x480
VB-M40	1/3	4.7-94	640x480, 1280x960
VB-C50i(R)	1/4	4-64	320x240, 640x480
VB-H41	1/3	4.7-94	up to 1920 x 1080

Lens Calculator
Lens Focal Length	MM
Distance From Lens To Object
CCD Size	Inch
CCD Resolution	Pixels
Custom CCD Resolution	x Pixels

Calculated Results
Minimum Detectable Object Size	x MM
Total Viewed Area	x
Field Of View	Degrees

Directions

This calculator finds the minimum detectable object size per pixel, the total area to be viewed, and the field of view of the lens, based on data entered for the CCD size and resolution, the focal length of the lens, and the distance from the lens to the object being targeted.

Each camera with lens has a CCD size and focal length. Zoom cameras have a range of focal lengths, for example 4 to 64 (see table.)

Use the table above to find the values to use for our most popular cameras. If not on the list, the camera's focal length(s) and CCD size should be listed on the camera detail page.

Then enter a numeric value for the distance from the lens to the object followed by a selection from the drop box for the designation of distance; the combined defaults yield 10 meters. Select the CCD size from the options in the drop box or select CUSTOM (mm).

The standard default is 1/4 inch. Select standard resolutions from the drop down box. Our video cameras typically output 640x480 video.

The result is displayed as a very accurate rendering of the minimum detectable size of the target object, in millimeters, the total viewed area in XX by XX format, further modifiable with the selection of the designation for size display. Finally, the field of view is given in degrees.