Optical measurement uses sensors to collect measurements without touching the object. It is precise and fast, but automated systems cannot correct errors like humans. The cost varies and companies offer information on their products’ applications and features.
Optical measurement is a measurement technique that relies on the use of optical sensors to collect measurements. There are advantages and disadvantages that must be weighed when using devices capable of taking optical measurements. There are several types of systems available, including those that are fully automated, as well as systems that allow for more manual control for precision measurements. High-end systems can be quite expensive and are found in laboratories and materials testing facilities where exact measurements are of paramount importance.
An advantage of optical measurement is that it is non-invasive. No contact is required, other than touching the stage of an optical measuring device. The probes do not touch the object to be measured and the device does not rely on destructive measurement techniques. For many applications, there is a desire to keep the items being measured intact throughout the process and as a result, optical measurement can be very attractive.
This technique can also be very precise. The optical sensor is highly sensitive and can detect subtle gradations and other differences that may not be visible to someone using probes or hand measurement techniques. This allows for very accurate measurements. There are many settings where they can be important, such as machining precision parts that have very close tolerances and need to be manufactured with as few errors as possible. Optical measurement is also very fast once an item has been set up correctly, with the device being able to take multiple measurements at the same time.
The main disadvantage of optical measurement is that automated systems are not necessarily capable of correcting errors that humans would be able to deal with. For example, if you are measuring a flat part and there is a small burr along one side, the machine will read the burr in the measurement, while a person will notice the burr and compensate for it during the measurement process. Computer numerical control (CNC) systems such as those used for optical measurement in environments such as quality control can be very adaptable, but are usually not capable of taking steps as intuitive as humans.
The cost of optical measuring systems varies and they are designed for different uses. The companies that manufacture such systems can provide information on the applications for which their products are best suited, as well as offer information on warranties, performance and other features that may be of importance to prospective buyers. Many companies also allow people to interact with their equipment before sales are finalized. This gives people the chance to practice and test new equipment.
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