Calibration and validation of MIRIS space observation camera

MIRIS (Multi-purpose IR Imaging System) space observation camera (SOC) uses a PICNIC array to obtain NIR (0.9-2.0 um) images. The focal plane assembly including the array will be operated at the temperature of 80 K, and the optics system will be cooled down to 200 K by passive radiation, to reduce the thermal noise. Although the absolute calibration will be performed in flight with some known calibration stars, it is important to calibrate and validate the instrument on ground. The calibration and validation include the optical performance check, the dark noise measurement, the flat-field measurement, and the spectral response measurements. We have designed and manufactured a "MIRIS SOC optimized" vacuum chamber to do the calibration and the validation. The vacuum chamber includes a thermal control function so that we can cool down or heat up the instruments. With this vacuum chamber and other optical instruments, we have performed the calibration of the MIRIS SOC.