DETAILED DESCRIPTION OF THE INVENTION FIG.
1 shows an embodiment of my invention.
Thus, there is shown a prism 10, which includes exterior side surfaces 12 and 14 which are parallel to each other.
The prism 10 is further defined by an entrance surface 16, which is disposed in a plane oblique to the parallel planes containing the side surfaces 12 and 14.
In addition, within the prism 10 are first and second surfaces 18 and 20, which are substantially parallel and define an airspace therebetween.
Also, it will be seen that first and second surfaces 18 and 20 are in a plane which is transverse to the planes which include the parallel side surfaces 12 and 14, as well as being transverse to the plane which contains the entrance surface 16.
Although I refer to the prism 10 as a unitary article, functionally it may be considered as being comprised of two parts, namely a first part bounded by the surfaces 14, 16 and 18, and the second part which includes the surfaces 20 and 12.
The prism may be constructed of any optical quality material.
A particular material which I have used is polymethylmethacrylate.
Considering the prism 10 in more detail, it was noted above that, as shown in FIG.
1, the planes which include the surfaces 18 and 20, and the plane which includes the surface 16, are transverse to the side surfaces 12 and 14.
More specifically, the orientation of the surfaces is such that the surface 16 is parallel to the image of the surface 14, which is created by reflection of surface 14 from the surface 18.
This orientation requirement thus defines the angular orientation of the surface 18 and the surface 16 vis-a-vis the surface 14.
As previously noted, the surface 12 is substantially parallel to the surface 14, and the surface 20 is substantially parallel to the surface 18.
As further shown in the drawing, a deformable mirror device 22 is disposed adjacent to and substantially parallel with side surface 14.
Because the construction of deformable mirror devices is generally known and shown in the prior art, for example, U
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