Anti-aliasing filter on scanners?

[alanrockwood]

I have a technical question.

Is there an anti-aliasing filter in scanner hardware? If not, is the resolution of the lens in a scanner of low enough resolution to prevent aliasing?

I suppose the answer to those questions might depend on the make and model of the scanner, but there are some scanners that have been tested and have resolution close to the theoretical maximum, and this suggest to me that the optical path (aside from the sensor array) might anti-aliasing means built in, whether it be an anti aliasing filter or a lens of a certain resolving power.

Though not the primary reason I am asking this question, it could relate to grain aliasing that is sometimes discussed in relation to scanners.

 

[alanrockwood]

Oops, I just noticed that I asked a similar question about three years ago. However, I also noticed at the end of that 2022 thread there was the following message:
Old Thread: Hello alanrockwood. There have been no replies in this thread for over 365 days.
Content in this thread may no longer be relevant.
Perhaps it would be better to start a new thread instead.

So maybe starting a new thread wasn't such a bad idea after all.

 

[koraks]

So maybe starting a new thread wasn't such a bad idea after all.

I'm OK with it, but let's at least save others the trouble of looking for the older thread you referred to: https://www.photrio.com/forum/threads/anti-aliasing-filter.189754
Search also turned up this related question you asked at some point: https://www.photrio.com/forum/threads/sampling-geometry-and-grain-aliasing.208265/