Maybe also something with the Transform Array / Line...Radial...

Of course with the good dimension of the object (so the good number of lines) and the good angle! ;)

Hi Jacklin,

it depends for what reason you need create this type of surface?
If you need it for rendering purpose, so Deform/Flow as Michael mentioned is good option or Pilou's advice regarding Array command should help as well, but if you need optical exact surface for precise illumination, so specialised software like Zemax or LightTools would be better choice.

Mik

Hello, Michael Gibson! Thank you very much for your help!

Thanks for your help! I am used for rendering. These methods are very useful to me. Thanks again!

Thanks for your help!