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Field of View Measurement
A rapid way to measure small parts
What is Field of View measurement?
Field of view (FOV) measurement uses a specially designed high-resolution video camera to measure a component within the optical field of view.
A wide-field telecentric lens allows the whole component to be seen within its large field of view, enabling all the features to be measured in seconds. Not only can the whole component be seen and measured, but depending upon the size of the component, multiple components can be measured at the same time. Depending upon the part being measured, this feature makes digital measuring systems preferred over profile projectors and optical measuring systems.
A field of view measurement system provides significant advantages, including dramatically increased speed and unrivaled simplicity. The table below compares Vision Engineering’s TVM field of view system to the size of a traditional optical measuring system, which is approximately 0.5mm to 20mm.
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|---|---|---|
2x objective (7.1mm Ø field of view) |
1x objective (14.2mm Ø field of view) |
Using a TVM 35 (21mm x 28mm field of view) |
How does it work?
‘Flat-field’ optics. Field of view measurement employs a high-resolution video camera, coupled with a large flat field telecentric lens system. The telecentric lens provides a flat image, across the full field of view, without any curvature or distortion, so you can place and measure your component anywhere within the field of view, without affecting the measurements.
No need to focus * Moreover, the ‘flat-field’ telecentric lens system has been designed with an exceptionally large depth of field, meaning your subject is always in focus*. Typically a depth of field (focus) with a comparable measuring device varies between a couple of microns and a couple of millimeters. Typically, a FOV measuring system has a depth of focus of 40mm or more (depending on the lens).
*Note: Once the system is focused, no further focusing is required for components of similar height.
Benefits of a Field of View measurement system
Place and Measure
A digital measurement microscope with instant and precise measurements, eliminating operator errors.
Instant Measurements
Clear video image of the subject and ‘Go/No Go’ simplicity. Ideal for single or multiple parts.
Motorized Stage
Instant measurements for parts larger than the field of view can be achieved with a motorized stage.
TVM Digital Measuring Microscope
TVM is a simple, easy-to-use digital inspection microscope delivering field of view measurements in an instant. The large 35mm field of view measures a wider range of samples accurately and quickly.
What’s more, a large depth of field means the focus is maintained. No time spent with fussy positioning or fixing: just place it, measure it, and move on to the next subject.
TVM can be equipped with a motorized stage making it easy to measure objects which don’t fit into the field of view, offering much faster measurements than old-style profile projectors.
Contact us to find out if the TVM is right for your application!
