projection calculator software for curved screens

You get one end right and the other end drifts out. Trying to get these angles correct by trial and error is frustrating. You'd be amazed the difference getting these angles right can make to screen geometry, especially if your projector is mounted significantly off-centre to the screen. Get-one-free-get-another-one-free Dept.: I've also sent as 'Sheet #2' my spreadsheet for calculating the tilt and yaw angles to which you'll need to set your anamorphic lens if the projector is installed off-axis from the screen's centre point. Ignore both if you want to, the figure given in the calculator proper is the most accurate The alternative formula is simpler, but less accurate, particularly down the low TR end of the scale. So far it's given pretty accurate results, but raising the TR to the power of 1.9-something-something, needs a sophisticated calculator anyway. It's an experimental formula I'm trying out to calculate anticipated pincushion percentage directly from just the Throw Ratio. You'll also notice a multi-colored box adjacent to the results area. Pincushion was part of the solution, so I included that formally in the results box. The calculator was actually originally written to calculate screen curvature. I've used these functions to verify that the calculations work (and they do seem to).ĭont forget: throw length is from the projector lens, not the anamorphic lens.

If you're familiar with either the SOLVER or the GOAL_SEEK functions of Excel, you can start out with the pincushion and, say, screen height and then work back to the throw distance (or vice versa if you have the throw distance).

Enter '1' for 'Home Theater' in cell B25. I was going to post that in my Build thread for others usage.įor the pincushion and curvature spreadsheet, make sure you select 'Home Theatre' (1) from the System Box.

I used it for my DIY screen and added some calculations to the bottom to help calculate the different distances to the screen for making standing support blocks. Or is there some other reason I should be aware of? I'll respect your wishes. Subject: fwd to others or you prefer not? RE: SpreadsheetĪ few guys on AVS forum have recently inquired to your spreadsheet, I've NOT fwd to them because it's not my IP (Intellectual property), are you OK if I privately email them?

Projection calculator software for curved screens