Product Description
This is a very nice Gaertner Scientific 100mm mirror mount on 0.500 inch pin base. Height of pivot axis above base is 75mm. Overall width of the holder is 140mm. Height of pin is 100mm.
This is a very interesting mount. There is an easily removable retaining ring (no tools required). Behind the locking ring is another ring that has three small but relatively strong springs fixed to its back. These in turn press against a ledge located on the rear of the cell. This ring then pushes the mirror or element against the retaining ring which acts as the reference plane. If a mirror or opaque element is being used, there is a thin cover plate that may be placed behind the spring ring that serves to protect the back side of the mirror. If a transmissive element is being used, then the cover plate may be omitted, yielding a clear aperture of 93mm.
There is a clamping screw for the horizontal tilting plane (vertical tilting plane is provided by the pin mount). A clamping sleeve for the post has been provided so the height is not disturbed when turning the holder on the pin axis.
The mount is in near-perfect condition. There are a couple of score marks in the chrome plating of the pin, but they are minor and they do not impede mounting the pin in a post-holder.
Location MB 94
Photo set 764