Infinity corrected design

FT-IR spectrometers specifically manufactured for reflection microspectrometry are commercially available. Such spectrometers can be combined with most microscopes having infinity-corrected optics (in which the output from the Cassegrain objective mirror becomes parallel radiation). Since, in the infinity-corrected design, the output... 

It is advantageous if the microscope objective is designed to work with collimated beams. Such objectives are called infinity corrected . 

Recent designs make use of the infinity corrected system, which provides greater versatility in adapting the microscope to new techniques. In this system, the specimen lies precisely in the front focal plane of the... 

The preceding discussion of substitution mechanisms barely scratches the surface of a field that has occupied the attention of many of tbe world s best coordination chemists. It is an area which seems to have an infinity of problems as well as methods of attack. It is unfortunate that it is not possible here to present a more comprehensive theory of substitution mechanisms. The discussion presented errs on the side of omission of fine points and controversial interpretations. For every experiment designed to confirm a mechanism, an alternative explanation can usually be found. As one noted researcher once said "(The members of the other school of thought] are extremely ingenious at coming up with alternative explanations for all of the conclusive experiments that we seem to do. 28 This should serve to remind us of the truism that u is not possible to prove that a particular mechanism is the correct one it is only possible sometimes to prove that an alternative mechanism is not correct. To this might be added a corollary Often it is extremely difficult to prove that the alternative is impossible. 

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