Microactuator apparatus and system

An apparatus comprising:

• a thermally-actuated microactuator configured to deflect a component in dependence on an applied stimulus;
• and
• an extender configured to increase deflection of the component by the microactuator, wherein the extender comprises one or more voids,
• wherein the microactuator comprises a bimorph, wherein the bimorph comprises a first layer and a second layer, and wherein the first layer and the second layer have different coefficients of thermal expansion,
• wherein at least one of the first layer or the second layer is configured as a resistive heater,
• wherein the second layer comprises one or more discontinuities along its electrical length, for different resistive heating at the one or more discontinuities than resistive heating of the second layer, and
• wherein the one or more discontinuities are locations where material has been removed from the second layer, or where strips of different material with lower electrical conductivity than that of the second layer have been added.