Projection on multiple planes using a single projection unit

A method comprising:

• producing, by a first light source, first light having a first characteristic;
• producing, by a second light source, second light having a second characteristic;
• combining, by a combiner, the first light and the second light to produce combined light having the first characteristic and the second characteristic;
• modulating, by a spatial light modulator, the combined light to produce modulated light having the first characteristic and the second characteristic;
• directing, by a divider, a first portion of the modulated light having the first characteristic in a first direction;
• and
• directing, by the divider, a second portion of the modulated light having the second characteristic in a second direction, the second direction different than the first direction.

An apparatus comprising:

• an aperture comprising:
• a first portion configured to transmit light having a first characteristic and to transmit light having a second characteristic;
• and
• a second portion surrounding the first portion, the second portion configured to transmit light having the first characteristic and to reflect light having the second characteristic.