in Unertl mount Parabolic Mirror Beam Splitter Precision Collimator 11856
For sale is a system that is a Precision Collimator.
It is composed of a appx. 24 inch parabolic mirror in Unertl mount.
Also included is a appx. 24 inch Beam Splitter Window Glass,
that has a half-mirror surface on one side and another
side is transparent.
This system has a focal distance of 264 inches.
I bought these pieces from a company called Recon Optical, that
had these two pieces for testing spy airplane cameras. They sold
this equipment because they moved operation to California.
Having no understanding of such optics, I thought that both are
"optical flats". I even listed them on ebay auction, "sold" for a lot
of money to unwitting buyers. However, a gentleman stopped by,
who worked there as an optics engineer, and he explained to me
what these things are. He said that you could build a precision
collimator with them. Of course, I had to undo those transactions,
thanks to gentlemanly understanding of those patient winning
bidders. Now I am listing them again, together, with corrected
The Unertl mount with mirror was not used all that much and spent
a long time in their storage. There is some minor rust on
the adjusting screws on the back, however, they all turn smoothly.
For shipping, a custom pallet with a crate will be built, with
a MANDATORY crating charge of $300, plus whatever it costs to
actually ship this.
(Click on the thumbnail images to enlarge)