Power lasers can also be included with optical devices as they are used for
scribing and machining of metals, laminates, and the like.
Accelerometers sense speed changes by measuring the force produced by the
change in velocity of a known mass (seismic mass), see Eq. (10.1). These devices
can be made with a cantilevered mass and a strain gauge for force measurement or can use capacitive measurement techniques. Accelerometers are now
commercially available, made using micromachining techniques. The devices can