Abstract
When optical or mechanical components are cemented to a substrate that exhibits errors in surface figure or tilt angle, the possibility exists that these errors will propagate to the work piece. If the cement layer thickness shrinks by a given fraction p, during setting of the cement the error propagation will occur at the same fraction causing losses in flatness, tilt angle, etc. These losses can be reduced to near-harmless levels (by a fraction p2) by adopting a two-stage cementing process, involving an intermediate substrate.
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