Since no one has yet replied on this subject, I just thought that I would mention that several NBTVA members have successfully used the Weiller mirror drum for camera and display purposes. As you suggested, each of 32 mirrors has a slightly different cant to move a different line segment of the picture across a stationary aperture, behind which is an appropriate photosensor, thereby scanning the entire picture with a revolution of the drum. Peter Yanczer has an excellent description of the Weiller drum on his website at
http://www.televisionexperimenters.com/mirrdrum.html .
A mirror type of optical scanning element for display purposes is advantageous because a single point light source that replaces the photosensor in the camera has its entire light output transferred to the display screen. There is no wasted light. The disadvantage to the Weiller drum is that it requires a separate mirror for each scanning line. This results in a large heavy optical scanning element that has 32 adjustments to make and maintain in alignment. John Logie Baird described a nicer mirror type of optical scanning element in his British Patent GB374,564 filed on 9 April 1931.
In one of his arrangements he describes a mirror unit that has several canted mirrors mounted on a revolving pyramidal support element that direct light from a modulated light source onto several canted stationary mirrors that in turn direct the light onto the screen. The number of scanning lines comprise the number of rotating mirrors multiplied by the number of stationary mirrors. For instance, you could use four mirrors mounted on a four sided rotating pyramidal support in combination with eight stationary mirrors.
With this arrangement, there are only twelve mirrors total to align and adjust. The rotating element has only four mirrors, so there is very little moving mass. Ernest Traub came up with a similar but more complex arrangement a few years later and I believe that it may have been put into production. See the Yancer site at
http://www.televisionexperimenters.com/mhalytrb.html .
See Baird's patent at
http://www.taswegian.com/NBTV/images/GB374564A.pdf