Radiation amount determination for an intended surface property level

A method comprising:

• identifying an intended surface property level of the surface of the 3D object;
• determining, from the intended surface property level, an intensity level, a duration, or both, at which radiation is to be applied as a flash of radiation by a radiation source onto the surface to cause the surface to have the intended surface property level, wherein the duration is a period of time between about 200 microseconds (μs) and about 2 seconds (s) depending upon the source of radiation;
• and
• outputting the determined intensity level, duration, or both at which the radiation is to be applied as a flash onto the surface.

A non-transitory computer readable medium on which is stored machine readable instructions that when executed by a processor are to cause the processor to:

• identify a defined surface property level of a surface of a three-dimensional (3D) object to be fabricated;
• determine, from the defined surface property level of the surface, an amount of radiation to be applied as a pulse of radiation onto the surface to cause the surface to obtain the defined surface property level, wherein the amount of radiation is an intensity level and a duration at which the radiation is applied as a pulse of radiation;
• and
• output the determined amount of radiation to be applied as a pulse of radiation.

A system comprising:

• a radiation source;
• and
• a processor to:
• identify an intended surface property level for a surface of a three-dimensional (3D) object;
• determine an amount of radiation to be applied as a flash of radiation onto the surface to obtain the intended surface property level;
• and
• cause the radiation source to apply the determined amount of radiation as a flash of radiation onto the surface of the 3D object.