Correction of horizontal astigmatism in an anamorphic lens

[tomasg81]

Hello,

I need advice which lens should I use for correction of horizontal astigmatism in anamorphics lens which contains two prisms.
Focal length which I need to be focused is about 3 meters.
I am using this prisms pair with projector. When I display grid horizontal lines are not focused, because pair of prisms cannot focus both planes together. See attachment - it is not visible but in personal yes.
I read that correction can be done by bended glass plate but I am not sure how to calculate curvature.

Thank you for help

 

[Valerie Park]

.The best way to correct horizontal astigmatism in an anamorphic lens is to use a cylindrical lens. A cylindrical lens is a type of lens that has different curvatures in two perpendicular directions, allowing it to focus light more accurately in one direction (in this case, horizontally) than the other. This type of lens can be used to correct astigmatism in an anamorphic lens by bending the light in the desired direction and making it more focused. When choosing a cylindrical lens for your application, you will need to take into account the focal length of the anamorphic lens and the distance at which you need to focus the image. You can use a lens calculator to help you determine the right curvature and focal length for your needs.