For more precise measurements of the temporal evolution of plasma in the study of inertial confinement fusion (ICF), a novel optical streak camera with ultrahigh temporal resolution is proposed. Based on the photo-generated carrier effects, waveguide transmission and prism dispersion principle, this all-optical device can avoid the influence of the space charge effect. Then the key component in the camera, the optical scanning module, is designed and simulated through an emulator aiming at 1 ps time resolution capability. Results show that this module can deflect the signal light and transform the information it contains from time domain into space domain, which verifies the feasibility of such system and its benefits for the following experiments.