Pinholes
John Hudak (hudakjm@mcmaster.ca)
Fri, 7 Apr 1995 15:45:28 -0400
One possible source for premanufactured pinholes would be condenser
apertures used in electron microscopes. As they are part of a high
resolution imaging system they are *very* accurate. Hole sizes available
range from 1mm (0.039 in.) down to 0.010mm (0.00039 in.). The holes are
either made in metal strips or in metal discs which range in outside
diameter from 2mm to 6mm. The metals that they are made in are usually
gold, platinum, or molybdenum. They are not cheap and prices vary according
to the size and material but they average around $40 to $60 (Canadian).
They are available from a number of electron microscopy supply companies.
-----------------------------------------------------------------------------
John Hudak hudakjm@mcmaster.ca
Electron Optics - Institute for Materials Research
McMaster University
Hamilton, Ontario, Canada