Alignment & Cooldown of the Webb mirror requires seven phases of work, which are shown in the figure above.
Credit：NASA
At present, the engineers of Webb's team have completed the alignment of the first phase of the main mirror, Segment Image Identification, and they have arranged the imaging results of the 18 lenses of the main mirror on THE HD 84406 into an "image array" similar to the honeycomb of the main mirror.
In Webb's early images, the stars were arranged in a honeycomb shape similar to the main mirror, known as the image array.
Credit: NASA/STScI/J. DePasquale
The image above is a random distribution of 18 stars captured by 18 lenses on HD 84406.
Credit：NASA/STScI/J. DePasquale
With the completion of the image array, Webb's team began the second phase of work, Segment Alignment, in which Webb's team would correct the large positioning errors in the 18 main lenses and update the alignment of the secondary mirrors to make each star point more focused.
Over the next few weeks, Webb's team will align and focus on the 18 points captured by each of the 18 lenses, and then stack these points to form a single point, which is a unified image of Webb's 18 lenses, which shows the process in detail.
Once all aligned, Webb's team began the third phase of work, image stacking, so that the 18 stars were superimposed on each other and became a point.
Then when the temperature of The Webb instrument dropped to the operating temperature, the Webb Space Telescope began working, expecting to send back its first spectacular scientific image this summer.
reference
https://blogs.nasa.gov/webb/2022/02/18/webb-team-brings-18-dots-of-starlight-into-hexagonal-formation/