Husserl's doctrines of imagination contain two parts: one is the overt doctrine of imagination, which discusses the consciousness of imagination (as Noesis) and includes the image theory and the representation theory of constitution; the other is covert doctrine of imagination, which carries forward Kant's transcendental imagination by genetic phenomenology, that is, retrospectively traces transcendental logic and establishes a new foundation for it, it includes the theory of internal time-consciousness and the theory of passive synthesis. Just because the difficulties and dilemmas that the overt doctrine of imagination met with, Husserl was pressed to explicate the operation of transcendental imagination in absolute conscious of constitution. Besides, this development process was pushed forward by the critique on inertia material and just for the reason that Husserl cannot finish this critique, he did not recognize the ontology of imagination, while Heidegger accomplished it first in Kant and the Problem of Metaphysics.
