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13 July 1988 Replication Of Transmissive Optical Surfaces
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Proceedings Volume 0896, Replication and Molding of Optical Components; (1988)
Event: 1988 Los Angeles Symposium: O-E/LASE '88, 1988, Los Angeles, CA, United States
Replication techniques have long been used to fabricate optical components. As early as the 1950's, serious studies of replication techniques were performed. During the late 60's and throughout the 70's replicated reflective optical components were used extensively as a cost effective alternative to conventionally fabricated components of unusual geometry. This paper addresses the problem of fabricating refractive replicated components. Until recently, these were manufactured in relatively small volumes or for prototype quantities. The obvious difference between reflective and refractive replication processes is that a metallic layer is present in the reflective replication process. The requirements of a transmissive replicated layer have significant impact of the choice of adhesives, coatings, mixing processes, and actual fabrication techniques. First, I will describe a process for fabricating a replicated refractive surface. Figure 1 depicts the geometry. A master surface is treated or coated with a release layer. This layer may then be overcoated with another coating, perhaps an anti-reflection or anti-abrasion coating. An adhesive is applied on top of this coating. The lens substrate onto which the replicated surface is to reside is then placed onto the adhesive and the sandwich is glued together. Fixtures are frequently used to keep the substrate in position while the adhesive cures. If they are properly designed, they fixtures can also assist if applying the forces required to release the substrate from the master. Specific details of a replication process depend on the particular choice of master substrate, release layers or surface treatment, adhesive and coatings.
© (1988) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Stephen D. Fantone "Replication Of Transmissive Optical Surfaces", Proc. SPIE 0896, Replication and Molding of Optical Components, (13 July 1988);


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