DLP 6500 的一个问题

这个问题我咨询了光学方面的工程师,下面是回复:

The configuration between the DMD and CCD will be what is called Scheimpflug.

From the diagram, the outbound dashed line from the DMD will be at 24° from the inbound dashed line (DMD normal).  In order to make sure that the image of the DMD surface is sharp across the entire CCD surface, the reimaging lens and the CCD must follow the Scheimpflug configuration.

There is a fairly good explanation on Wikipedia here à https://en.wikipedia.org/wiki/Scheimpflug_principle

Here are other resources:

http://www.trenholm.org/hmmerk/SHBG05.pdf

http://www.trenholm.org/hmmerk/SHBG06.pdf

You need to be aware that this will make the image sharp (i.e. in the focal plane) on the CCD surface, but will change the geometry of the image (keystone).  If it needs to be changed it will then need to be done in post image processing.