A smartphone-based arbitrary scene projector for detector testing and instrument performance evaluation

Abstract

Using the high-resolution OLED screen of a smartphone to project arbitrary scenes and patterns can open a complete new dimension for testing sensors in the visible. Based on an original concept from JPL (Jet Propulsion Laboratory), this contribution describes a new experimental setup designed to achieve the demanding performance of its first application by ESA (European Space Agency): the evaluation of radiation-induced CTI (Charge Transfer Inefficiency) on Euclid's weak lensing measurement. We show that pushed to its limits especially in terms of calibration such a simple experiment can deliver a level of optical performance high enough to be applied in the verification of high-precision astronomy instrument performance.

Calibrating and correcting charge transfer inefficiency in CCDs using Pyxel

“…smartphone projection system as described in 5 and acquired using a Teledyne e2v CCD273 14-62-17-01, 6 manufactured for the Euclid VIS instrument. This CCD has previously been proton irradiated at room temperature to end-of-life fluence (4.8 10 9 p + cm −2 10 MeV equivalent), see also 5 for more information on the irradiation.…”

“…Then, by using these parameters found via calibration, the ArCTIC can be leveraged to correct for CTI in realistic galaxy images acquired using the same irradiated CCD and a smartphone projector experiment. 5…”