Focal plane arrangements of the CSST wide-field survey camera (left), Euclid VIS (middle), and NISP (right). The X and Y axes in each camera define the reference frame in the focal plane. For CSST, the focal plane is segmented into 30 tiles with 18 for multi-band imaging (cyan tiles) and 12 for slitless spectroscopy (dark grey tiles). The layout of the filters and corresponding serial numbers for both imaging and spectroscopy are also shown. The 30 tiles, each of 9k × 9k pixels, are arranged into a 5 × 6 array with the FoV of . For Euclid VIS and NISP, the schematic focal planes are taken from Euclid Collaboration (2022). The VIS imager comprises 36 4k × 4k CCDs with a pixel scale of , while the NISP includes 16 arrays of 2k × 2k HgCdTe detectors with a pixel scale of . The joint FoV of the two instruments, which is about 0.54 deg², is shown in the red dashed frames.