in making thermoset and photo - set polymer - matrix composite parts , curing is the key process step that transforms the molecular structure of the composite material , stabilizing it in the desired shape . this curing system applies carefully controlled ultraviolet radiation dosages , appropriately distributed over the entire surface of the composite part , thereby rapidly curing the material while enabling direct monitoring and control of the curing energy . previous photo - curing methods have applied generalized radiation to a part with conventional uv lamps . we provide great benefits in cure depth , speed and process control by precisely controlling all parameters of uv dosage , by computed control , by markings on the part , or by dynamic feedback control from embedded sensors or non - contact sensors . this system can apply greater radiation dose to areas of increased quantities of resin , such as support ribs , and lesser radiation dose to areas of decreased quantities of resin . this method can be enhanced by using differing resins which respond to differing wavelengths , and also by controlled changes of radiation field size or duration . this curing system also enables temporary joining of parts by sufficient partial or controlled - area photo - setting , which may also be integrated with lay - up or winding operations . as a result , these partially cured parts can be handled safely through later stages of the manufacturing process , such as final photo - setting or baking operation in an oven or autoclave .