Irradiation of lead based quantum dots to generate near infrared phosphorescence as part of a compact, thin profile, on-demand calibration source

A light source, comprising:

• an ultraviolet light layer that, in operation, generates ultraviolet light;
• a quantum dot layer that absorbs the ultraviolet light and, in response, generates radiation within the near infrared region at a selected intensity;
• and
• a phosphor layer between the ultraviolet light layer and the quantum dot layer that absorbs a portion of the ultraviolet light to generate visible light.

A calibration device, comprising:

• an ultraviolet light layer that, in operation, generates ultraviolet light;
• a quantum dot layer that absorbs the ultraviolet light and, in response, generates radiation within the near infrared region at a selected intensity;
• and
• a phosphor layer between the ultraviolet light layer and the quantum dot layer that absorbs a portion of the ultraviolet light to generate visible light.