gary wrote:Harry I am probably going to make a goose of myself here but my excuse would be I am having trouble interpreting your images, also it maybe you are just trying to show the light path in some way I don't quite understand, but whilst the direction you are showing the beam of light is correct for when it is operating as a camera, surely you would want to reverse that (i.e. from the source to the line scanner to the frame scanner). That way you would project a raster on the area you would be "scanning" when in camera mode ( or "spotting" if in FSS mode). If that raster is correct then the reverse (i.e. camera mode) would be correct.
In other words there is a "duality" in this type of system whereby if you replace the photo detector with a light source you change a camera into a projecting monitor (or FSS if the light source is unmodulated) - and vice versa.
Hi Gary
No goosing here
thats my job Whoops i should explained my self more .
Yes i am trying to show the path of the light so i can see if i have the optics about right, done it a few times the other way in projecting but this is a different kettle of fish for me .
Yes again Gary i would rather the line polygon first but the polygon mirror is very thin its easier to project from the lens to the frame mirror then to the line then to the light sensor , also because of case and where the lens is its just working out better to reflect off the frame mirror
The camera is laying on the side so the line mirror would be upright when working in NBTV format.
I was thinking about testing both mirrors working in a Flying spot test just to see if the vibrating side of it works i sort of was going to do that a few days ago i was going to use the laser i scrapped from the brother laser scanner but it was dead i was not happy !
It would of been nice to see a raster.
So of late i have been trying to work out experiments to make sure my sensor only sees a spot of light from the polygon as it sweeps by the sensor...i think working on this i see theres a bit of unwanted light scattered by the mirrors and i suppose entering the camera via the lens , a Nipkow perhaps blocks a lot of this more than one of these do.