Schematic cut-away illustration of the LET1 telescope on PSP. Colors indicate different materials, as follows: orange–active silicon, yellow–inactive silicon, green–polyimide detector mounts, blue–Kapton windows, and brown and beige–aluminum telescope housing. The scale can be judged from the fact that the circle encompassing the five active segments of L0B has an area of 1 cm². The figure was adapted from Wiedenbeck et al. (2017).