Abstract: This study presents a multilayer design and fabrication of an optical notch filter for enhancing visual quality. A cost-effective multilayer design of notch filter with low surface roughness and low residual stress is proposed. A 9-layer notch filter composed of SiO2 and Nb2O5 with a central wavelength of 480 nm is prepared by electron beam evaporation combined with ion-assisted deposition. The optical transmittance, residual stress, and surface morphology are measured by a UV/VIS/NIR spectrophotometer, Twyman-Green interferometer and field emission scanning electron microscopy (FE-SEM). The transmittance of the notch filter at the central wavelength is above 15%, and the average transmittance of the transmission band is about 80%. The residual stress of the notch filter is −0.235 GPa, and the root mean square surface roughness is 1.85 nm. For improving the visual quality, a good image contrast can be obtained by observing the microscopic image using the proposed notch filter. Keywords: notch filter; electron beam evaporation; ion-assisted deposition; surface roughness; residual stress

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Tien, Chuen-Lin, Hong-Yi Lin, Kuan-Sheng Cheng, Chun-Yu Chiang, and Ching-Ying Cheng. 2022. "Design and Fabrication of a Cost-Effective Optical Notch Filter for Improving Visual Quality" Coatings 12, no. 1: 19. https://doi.org/10.3390/coatings12010019

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Tien, C.-L.; Lin, H.-Y.; Cheng, K.-S.; Chiang, C.-Y.; Cheng, C.-Y. Design and Fabrication of a Cost-Effective Optical Notch Filter for Improving Visual Quality. Coatings 2022, 12, 19. https://doi.org/10.3390/coatings12010019

Tien C-L, Lin H-Y, Cheng K-S, Chiang C-Y, Cheng C-Y. Design and Fabrication of a Cost-Effective Optical Notch Filter for Improving Visual Quality. Coatings. 2022; 12(1):19. https://doi.org/10.3390/coatings12010019

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Tien, C.-L.; Lin, H.-Y.; Cheng, K.-S.; Chiang, C.-Y.; Cheng, C.-Y. Design and Fabrication of a Cost-Effective Optical Notch Filter for Improving Visual Quality. Coatings 2022, 12, 19. https://doi.org/10.3390/coatings12010019

Tien, Chuen-Lin, Hong-Yi Lin, Kuan-Sheng Cheng, Chun-Yu Chiang, and Ching-Ying Cheng. 2022. "Design and Fabrication of a Cost-Effective Optical Notch Filter for Improving Visual Quality" Coatings 12, no. 1: 19. https://doi.org/10.3390/coatings12010019

Tien C-L, Lin H-Y, Cheng K-S, Chiang C-Y, Cheng C-Y. Design and Fabrication of a Cost-Effective Optical Notch Filter for Improving Visual Quality. Coatings. 2022; 12(1):19. https://doi.org/10.3390/coatings12010019

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The 17092 is a reflective sensor that also includes an iR emitter and phototransistor in a package which has the added advantage of blocking visible light. This ...

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