Product Description
This is a modular autocollimator assembly manufactured by United Detector Technology (UTD). It probably dates from the early 1980's or late 1970's. The model 1000 autocollimator head had two different focal length lenses available, as well as several types of detectors. There is a BNC cable coming from the collimation head, but there is no beam-splitting prism present. I am not sure if a detector is within the head, or if there was some sort of light source. If it were a detector I would have thought there would have been some sort of quadrature sensor, in which case one would need significantly more data lines than a simple coaxial connection. The end of the autocollimator tube is an open sleeve of 1 inch diameter.
Probably the more important element of this offering is the collimation objective tube. The outer diameter of the sleeve is 3.5 inches, and a flat has been milled on the bottom of the housing with 1/4-20 screw threads in three places. The focal length of the objective is 400mm, and the diameter is just shy of 2.75 inches. This is the larger of the two interchangeable objectives - the other had a focal length of 200mm.
There is a tiny chip out of the periphery of the lens that has been covered with an opaque epoxy, but the rest of the lens appears to be in perfect condition. (See last photo). It probably cuts down the effective aperture by less than 1/4 mm.
Photo set 1327