System Design

Online Tools & Documents

Calculating the object size y / field of view (FOV)

The object size y is usually the region of the object to be captured that must be viewed with the camera.

For elongated objects, the sensor length is usually used. For round or square objects, please use the sensor width.

classic

y= y´ * (a/f´-1)

Extended calc. using width, heigth, diagonal

using the reproduction scale

using the opening angle

Calculating the object size or FOV using entocentric standard lenses

Note: Even when using the drop-down lists own values can be entered. Please use the first entry "user def."!

Sensor size:
Focal length:
Working distance in mm:

Calculated object size (FOV):

We respect your privacy: We do not store any inputs, results or recipients. Send your calculation with your own email program (MailTo-link).

Calculating the object size (height, width, diagonal) using real sensor dimensions

Note: Even when using the drop-down lists own values can be entered. Please use the first entry "user def."!

Sensor pixel count in X direction:
Sensor pixel count in Y direction:
Pixel size in µm:
Focal length of lens:
Working distance in mm:

Calculated sensor dimensions:
Calculated sensor ratio:

Object size / FOV
X:
Y:
Diagonal:

We respect your privacy: We do not store any inputs, results or recipients. Send your calculation with your own email program (MailTo-link).

Attention: Calculated object sizes of several millimetres can indeed be realised by means of entocentric lenses (incl. close-up rings), but often hardly useful. Normal objects with close-up rings in retro position provide an alternative for better image quality. In case of smallest image details and large magnifications please use macro-lenses which are specially designed for these applications.

Further details on optical calculations can be found in chapter Optical basics.

Calculating the object size using the reproduction scale (macro & telecentric lenses)

Also for macro lenses and telecentric lenses it is possible to calculate the field of view using the imaging scale and sensor size.

Object size y = sensor size y´ / imaging scale ß

Note: Even when using the drop-down lists own values can be entered. Please use the first entry "user def."!

Sensor size:
Imaging scale of lens:

Calculated object size (FOV) in mm:

We respect your privacy: We do not store any inputs, results or recipients. Send your calculation with your own email program (MailTo-link).

Calculating the object size from opening angle

The field of view at a given working distance can also be calculated using the aperture angle of the optics.

Opening angle of lens:
Working distance in mm:

Field of view (object size):

We respect your privacy: We do not store any inputs, results or recipients. Send your calculation with your own email program (MailTo-link).

Note:

Further details on optical calculations can be found in chapter Optical basics

Kalkulation Beleuchtung industrielle BV

Need to buy the perfect lens?

Vision-Doctor.com is a private, independent, non-commercial website project without customer support.

For the best advice and sales of machine vision lenses please click here.

_{(external link partner website in Europe - All listed lenses can be ordered here)}