Re: [ATM] Commercially available Fine Screws

["Don Clement" <clement.focuser@verizon.net>]

Hi Stan,

> Or, for a real treat:
> http://www.newport.com/store/product.aspx?id=3842
> Though a bit pricey, these are exquisite and a pleasure to behold.
> They adjust with a precision and accuracy only, in my experience,
> improved upon with piezoelectric actuators. Dail-in interferometric
> precision out of the box.

Another way to get dial-in interferometric precision at an ATM price is to
use an inexpensive and commonly available micrometer head with 40tpi screw
threads coupled with a bowed flexure. A bowed flexure with an amplification
of 5 would give the equivalent of 200 tpi ultra-precision screw threads.
Some discussion on the easily made bowed flexure can be found here:

http://pergatory.mit.edu/2.75/2_75%20Lectures/PMD%20Topic%2017%20Flexures%20.pdf



Don Clement

Running Springs, California

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