An example method includes receiving, from a light detector, information indicative of a light intensity of a field of view of an optical system. The optical system includes one or more optical components and a light detector configured to receive light from a field of view of an environment of the optical system by way of the one or more optical components. The optical system also includes an occlusion-detection camera configured to capture images of the one or more optical components. The example method also includes adjusting, based on the received information, at least one operating parameter of the occlusion-detection camera. The example method also includes causing the occlusion-detection camera to capture at least one image of the one or more optical components according to the at least one adjusted operating parameter.