Telescope Mirror Scale Method Adjustments And Tests

Cover Telescope Mirror Scale Method Adjustments And Tests
Telescope Mirror Scale Method Adjustments And Tests
Silas W Silas Whitcomb Holman
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If deflections are taken on one side only, i. E. , without reversals of M, the requisite closeness in (3 will be attained when sin /3 tan 2 I OOO 500 roughly = o. Oo 060.
This corresponds to /3 = 0. 00060/0. 0174 = o. O35 roughly = 2'.
26 The Telescope-Mirror-Scale Method.
But it is more convenient to have the requisite closeness expressed in term
...s of M A 1 MB'. Now, nearly enough when /3 is very small, AA' = BB'=OA tan/3=OA sin /3 = o. Oo 060 500 = 0. 30 mm. , and also MA' MB' =A A' -\- A ' = 2 OA tan /3 0. 60 mm. Hence, the requisite closeness in MA' MB' without reversals is 0. 6 mm.
If reversals of deflections are taken, giving d on one side and d^ on the other, the corrected deflection is \d\-\-d-L sin /3 tan 2 qp sin 2 j8 -}- sin /3 tan 2(f sin 2 @\ 2 L 2 2 J = JL(4+4 J )_ sin 2 /3.
2 2 Hence the requisite closeness will be attained when sin 2 /3' = o.


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