8 August 2013 Nondestructive metrology by optical coherence tomography empowering manufacturing iterations of layered polymeric optical materials
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Abstract
In recent years, there has been an ever-growing interest in exploring different optical materials and components to develop compact and effective optical systems. The design and fabrication of high-performance optics require nondestructive metrology techniques to inspect the samples. We have investigated the capability of optical coherence tomography (OCT) to nondestructively characterize layered polymeric materials. Using a custom developed Gabor-domain optical coherence microscopy system centered at 800 nm with 120 nm full width at half maximum enabling unprecedented 2 μm resolution both laterally and axially in an 8  mm 3 volume, we investigated the internal structure of 50 μm thick films and layered sheets, which prompted the manufacturing process to adopt a compatibilization technique. Based on a custom swept-source OCT system centered at 1320 nm with expanded imaging field-of-view and latest depth of imaging extended to ∼5  mm , we performed nondestructive metrology of the layer thickness profiles over the depth of a monolithic layered sheet and diagnosed a film compression issue within the sheet. With the OCT metrology, the manufacturing process has been advanced and the layer thickness profile of a recent layered gradient refractive index sheet shows improved uniformity through depth.
© 2013 Society of Photo-Optical Instrumentation Engineers (SPIE)
Jianing Yao, Jianing Yao, Panomsak Meemon, Panomsak Meemon, Kye-Sung Lee, Kye-Sung Lee, Jannick P. Rolland, Jannick P. Rolland, } "Nondestructive metrology by optical coherence tomography empowering manufacturing iterations of layered polymeric optical materials," Optical Engineering 52(11), 112111 (8 August 2013). https://doi.org/10.1117/1.OE.52.11.112111 . Submission:
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