Chemistry: electrical and wave energy – Processes and products
Patent
1987-05-08
1988-04-26
Tufariello, T. M.
Chemistry: electrical and wave energy
Processes and products
C25D 106
Patent
active
047402768
ABSTRACT:
An electroforming method is described for making a cooled segmented aperture (SAM) mirror suitable for use with high energy laser irradiation. The method avoids the problems associated with discrete segment SAMs by using electroforming to fabricate a continuous faceplate having a surface shape of the desired array of segments and coolant channels just below the optical surface to provide improved performance under high energy laser irradiation. A master mirror is fabricated from discrete segments. Raised circular lands on the rear of the segments aid alignment of the segments. A negative faceplate is electroformed on the master mirror. A positive faceplate is electroformed on the negative faceplate. Cooling channels are electrical discharge machined into the back of the positive faceplate and additional material electrodeposited to close the channels. A manifold for coolant flow through the cooling channels and bosses for safety screws are attached to the back of the positive faceplate and held in place by a further electrodeposition. Large substrates are epoxy bonded to the electroformed negative and positive faceplate deposits before separation from their respective masters to prevent elastic deformation of the deposits. Separator bars are used to facilitate separation. The structure of the CSA mirror made from the method is also disclosed.
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Krebs David L.
Lee Joey T.
Marmo Jay
Ranstrom James R.
Sinder Fredric L.
Singer Donald J.
The United States of America as represented by the Secretary of
Tufariello T. M.
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