  Currently, an upgrade consisting of seven densely instrumented strings in the
center of the volume of the IceCube detector with new digital optical modules
(DOMs) is being built. On each string, DOMs will be regularly spaced with a
vertical separation of 3 m between depths of 2160 m and 2430 m below the
surface of the ice, which is a denser configuration than the existing DOMs of
IceCube detector. For a precise calibration of the IceCube Upgrade it is
important to understand the properties of the ice, both inside and surrounding
the deployment holes. The camera system together with the LED illumination
system was developed and produced at Sungkyunkwan university and are installed
in almost every DOM to measure these properties. For these calibration
measurements, a new simulation framework, which produces expected images from
various geometric and optical variables has been developed. Images produced
from the simulation will be used to develop an analysis framework for the
IceCube Upgrade camera calibration system and for the design of the IceCube
Gen2 camera system.
