Black body radiation device

A black body radiation device, comprising:

• a first heat source module comprising a first heater and a first temperature equalizing plate, wherein the first temperature equalizing plate contacts the first heater;
• a second heat source module separated from the first heat source module, the second heat source module comprising a second heater and a second temperature equalizing plate, wherein the second temperature equalizing plate contacts the second heater;
• a temperature control module connected to the first heater and the second heater respectively, to control the first heater and the second heater, thereby keeping the first temperature equalizing plate at a first predetermined temperature and keeping the second temperature equalizing plate at a second predetermined temperature;
• and
• a housing configured to accommodate the first heat source module, the second heat source module, and the temperature control module, the housing has at least one opening, wherein the opening is configured to expose the first temperature equalizing plate and the second temperature equalizing plate.