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Re: [ATM] Set of specs.
The light from the mirror needs to go past the knife edge and be cut by it
to produce the shades of gray in the mask openings. The light then goes
into your eye. The micrometer measures the difference in ROC between the
zones of the mirror when the two openings in the mask have the same
brightness.
Bob May
bobmay@nethere.com
http://nav.to/bobmay
http://bobmay.astronomy.net
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