Re: [Goptical] How to use Lens::add_surface() - beginner question

[Dibyendu Majumdar]

Hi,

I made some progress with this, using data for a lens from Modern Lens
Design book.
The book provides the circular aperture radius data - but this is not
present in the patent literature - so presumably this is derived
somehow?

Thanks and Regards
Dibyendu


On Sun, 15 Sep 2019 at 18:46, Dibyendu Majumdar <address@hidden> wrote:
>
> Hi,
>
> Thank you for creating this project.
>
> I am a novice user - I know very little about lens design.
>
> I am mainly interested in taking some lens design patents
> (https://cameragossip.github.io/nikon-lens-patents.html) and using
> goptical to generate various diagrams. So I am trying to modify the
> tessar example.
>
> I see that the add_surface() method takes following parameters:
>
>           @param roc spherical radius of curvature. 0 means flat curve.
>           @param ap_radius circular aperture radius.
>           @param thickness distance to the next surface or exit plane.
> @see get_exit_plane.
>
> I am not sure what the meaning of ap_radius is - and what value to
> use. I do not see this specified in the patent literature.
>
> I would very much appreciate any help.
>
> Many thanks
>
> Regards
> Dibyendu