... WFC3 Data Handbook > Chapter 1: The WFC3 Instruments > 1.3 The IR Channel . ... The IR detector employs a 1024 x 1024 Teledyne (formerly Rockwell Scientific) low-noise, high-QE HgCdTe detector array with ~0.13 arcsecond pixels, covering a nominal 136 x 123 arcsecond field of view. ... Figure 1.3 shows a schematic of the IR channel aperture projected onto the sky with respect to the V2/V3 reference frame. ... For a thorough discussion of WFC3 geometric distortion, we refer the reader to Chapter 4 . ...