An optical sensing device uses a set of source mirrors directing light
from a set of light sources to a movable collector mirror. Each of the
light sources has a unique wavelength. The collector mirror is coupled to
a MEMS actuator that moves the collector mirror in response to a physical
phenomena. A light collector gathers light from the collector mirror and
the physical phenomena can be measured by determining the relative
intensity associated with each of the light sources in the light gathered
at the collector.