Abstract
A degumming process for optical cemented elements by using a GHJ 01 optical epoxy adhesive bond was researched,and a rapid degumming method suitable for precision optical cementing was proposed.Combined with the actual engineering application requirements,the formula of the adhesive layer thickness for the adhesive cementation was summarized to determine a proper opticalmechanic cementing clearance.The operation processes and cementation curing principle were discussed and the technical problems during the curing were concerned carefully.It points out that the technical points of degumming experiments for a high-precision optical cemented element is to choose a reasonable hot strip temperature and a heating speed according to the different cementing agents and cementation structures.A degumming experiment was performed by using a high precision cemented lens and the quick and microstress degumming of the optical parts was implemented by choosing an appropriate hot strip heating process.The experiment shows that the fused silica mirror has been deformed seriously after the cementation,and it is about 6times that of the original surface value(The original surface value is 0.02λand that is 0.14λafter deformation).However the surface valueof the fused silica mirror has achieved 0.018λafter the degumming experiments and reworked process finally.The surface value meets the design requirement very well,and the degummed time is 105 h.The new degumming method meets the integrity and micro-stress requirements of the optical elements and avoids the cost of waste and discarding optical elements.It could also been applied to the other same type optical components.
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