Surface profile measurement of 3D-printed transparent objects using nonlinear optics
In Additive Manufacturing (AM), it is necessary to measure the surface profile of 3D-printed transparent objects in noninvasive manner, which remained, however, practically difficult to date. Nonlinear optical responses of transparent materials have been utilized in shortwavelength light generati...
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| Main Authors: | , , |
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| Other Authors: | |
| Format: | Conference or Workshop Item |
| Language: | English |
| Published: |
2018
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/88670 http://hdl.handle.net/10220/45977 |
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| Institution: | Nanyang Technological University |
| Language: | English |
| Summary: | In Additive Manufacturing (AM), it is necessary to measure the surface profile of
3D-printed transparent objects in noninvasive manner, which remained, however, practically
difficult to date. Nonlinear optical responses of transparent materials have been utilized in shortwavelength
light generation, optical phase/intensity modulators, and non-destructive inspection of
the sample characteristics. In this research, we introduced nonlinear optics to surface profile
measurement of 3D-printed micro-optic structures. For in-depth understanding of third harmonic
generation mechanisms, the harmonic conversion efficiency was measured with different input
polarization states, incident angles, and focal depths in the transparent materials including
Sapphire and Si wafers. Our results can be utilized in surface inspection required in various
industrial and scientific applications, including 3D-profile measurement of printed optical
components and waveguides. |
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