The optical measurement uses optical sensors to collect measurements. There are advantages and disadvantages that must be weighed when using instruments capable of optical measurement. Many different types of systems are available, including fully automatic systems, video measurement system, as well as systems that allow more manual control for precise measurements. High-end systems can be quite expensive and are found in laboratories and material testing facilities where accurate measurements are critically important.
One of the main benefits of optical metrology is that it is non-invasive. Beyond the phase contact of the optical measuring vision system, no contact is required. The probe does not touch the object being measured and the instrument does not rely on destructive measurement techniques. For many applications, there is a desire to keep the objects being measured intact throughout the process, and subsequently, optical measurement can be highly attractive.
This technique can also be very accurate. The optical sensor is highly sensitive and can detect subtle gradations and other differences that may not be visible to someone using probes or manual measurement techniques.
This allows for very precise measurements. There are many settings where they can be important, such as machining precision parts that have very low tolerances and should be produced with as few errors as possible. Optical measurement is also very rapid once an item is set up properly, with the device being able to take multiple measurements at once.
Optical measurement machine vary in cost and are designed for different uses. Companies that manufacture such systems can provide information about the applications for which their products are best suited, as well as information about warranties, performance, and other features that may be important to potential buyers. Many companies also allow people to interact with their vision measurement machine before finalizing the sale. This gives people a chance to practice and test new equipment.
VIEW offers a full line of optical metrology systems for wafer, photomask, slider, MEMS, semiconductor package, HDD suspension, probe card, and micro-component process measurements.
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