How did Edmund Husserl use the terms noesis and noema?

In the phenomenology developed by Edmund Husserl, the terms noesis and noema are used to describe the essential structures of intentional experience, which is the directedness of consciousness toward an object.1

Husserl distinguishes between these two aspects as follows:

• Noesis: This refers to the subjective aspect of an intentional experience, representing the act of consciousness itself (such as perceiving, imagining, or judging).12
• Noema: This represents the objective aspect or the content within an intentional experience—the "object" as it is intended or constituted through the corresponding noetic act.31

For Husserl, these concepts are central to his goal of discovering the essential structures of consciousness. He argued that Being is accessible to the philosopher only as a correlate of these conscious acts, making the analysis of the relationship between noesis and noema fundamental to establishing philosophy as a rigorous science.1