Making a shape like the JWST's mirror

[ivla]

My version of JWST mirror modelling process (orange is a selection color here)

Make 3-sided cylinder


Split three upper edges to halves and connect new vertices


Select two side faces and mirror on it


Select this edge and dissolve it


Select face and mirror on it


Select central vertice and center the object ("move absolute" to x=0.0 z=0.0 with "move object" checked)


Duplicate object to get an appropriate form as shown above in this thread ("Put on[RMB]" or "duplicate radial")


Make another object to define the mirror curvature


Select one vertice in center of one of objects


Twice extend a selection (press "+") and select all similar vertices ("i")


Deform - Inflate[RMB]




Press "Tab" and input "100"


Select vertices on rear side, then Deform - Inflate[RMB]


Done.


Now you can weld objects as you need.