Apparatus and methods for three-dimensional sensing

A system comprising:

• a projector for projecting first light into an environment;
• a first sensor for capturing first data associated ambient light of the environment;
• one or more processors;
• non-transitory computer-readable media storing computer-executable instructions, which when executed by the one or more processors cause the one or more processors to:
• access the first data captured by the sensor;
• estimate an amount of the ambient light associated with the projector while the projector is in an on state based at least in part on the first data;
• detect, based at least in part on the estimate, an event indicating that amount of light is does not meet normal operating conditions;
• and
• cause a transition of the projector from an on state to an off state based on the event.

One or more non-transitory computer-readable media storing instructions that, when executed, cause one or more processors to perform operations comprising:

• causing a sensor to measure first light from a projector module;
• causing a first photodiode to capture first data associated with a level of ambient light while the projector module is in an on state;
• storing the first data;
• detecting, based at least in part on the level of the ambient light, that the projector module is operating outside one or more normal operating conditions;
• and
• sending, in response to detecting the projector module is operating outside of the one or more normal operating conditions, a signal to the project to cause the projector module to a transition from an on state to an off state.