Reflecting Microscope Objective Near IR to Near UV

Description

This is a Nicolet Instruments Corp Reflecting Microscope Objective, Near IR to Near UV.

This is another very unusual reflecting microscope objective of the Cassegrain type. Mirrors are used for all of the imaging elements – there are no refractive components. As a consequence the objective is largely free of chromatic aberrations over a large spectral range. The objective is suitable for work from the near UV well into the IR region. It appears that the reflecting elements are silver (aluminum coating?). I could not see any blemishes in the coatings.

The aperture of the objective is very small (only about 5mm diameter) so the secondary mirror is minute. The initial magnification must be quite high – probably in the range of 50x to 75x. Unfortunately there is no nomenclature anywhere on the lens. It is probably intended for use on an IR imaging microscope of some sort. It does have an RMS thread adapter with a locking collar for orienting the objective on the adapter.

Thread mount – RMS thread on centering adapter
Overall height to thread shoulder – 82mm
Diameter of system – 70mm
Diameter of front aperture – 5mm

The lens also has a side port that is aligned with a slot in the base of the objective. There appears to be some sort of right-angle mirror in the slot that occludes one half of the imaging elements. The port is either for a vertical illuminator or for some sort of detector. There is a thread in the anodized hub visible through the bore in the chrome shroud.

The objective appears to be in perfect condition. Could only see one half of the mirror system, but it looked unblemished.

Photo set 1643

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***MPN
***OEM Nicolet Instruments Corp
***SKU*** 23064