Spherically bent crystal imaging is a measurement technique that can be used to achieve quasi-monochromatic high-resolution imaging in experimental studies of inertial confinement fusion based on high power laser facilities. With a high-resolution backlight arrangement design similar to that of point projection, the spherically bent crystal imaging system developed is applied to 10 kJ-level Shenguang facilities for hydrodynamic instability, implosion compression trajectory, and other experimental studies of laser-induced plasmas. When it is applied to interface trajectory measurement during the ablation and compression of spherical samples, the spherically bent crystal imaging has the advantages of a large field of view, quasi-monochromaticity, and self-smoothing of backlight intensity distribution. The influences of the resolution in the meridian direction and that in the sagittal direction on one-dimensional interface trajectory measurement are balanced by optimizing imaging parameter design without changing the arrangement parameters of the imaging system. Even with a larger backlight, the spatial resolution of the interface trajectory absorption image is improved, and the signal-to-noise ratio of the image is also effectively enhanced. An accuracy of 2.1% is achieved in implosion velocity measurement by combining the optimized spherically bent crystal imaging system with the alternative target design.