Optical engineering is the field of study that focuses on applications of optics.
Since optical engineers want to design and build devices that make light do something useful, they must understand and apply the science of optics in substantial detail, in order to know what is physically possible to achieve in (physics and chemistry). However, they also must know what is practical in terms of available technology, materials, costs, design methods, etc.
With other fields of engineering, computers are important to many (perhaps most) optical engineers. Engineers often use general computer tools and they should use of specialized optical software designed specifically for their field.
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