TY - CHAP A1 - Pulwer, Silvio A1 - Steglich, Patrick A1 - Villringer, Claus A1 - Bauer, Joachim A1 - Burger, Martin A1 - Franz, M. A1 - Grieshober, K. A1 - Wirth, F. A1 - Blondeau, J. A1 - Rautenberg, J. A1 - Mouti, S. A1 - Schrader, Sigurd T1 - Triangulation-based 3D surveying borescope N2 - In this work, a measurement concept based on triangulation was developed for borescopic 3D-surveying of surface defects. The integration of such measurement system into a borescope environment requires excellent space utilization. The triangulation angle, the projected pattern, the numerical apertures of the optical system, and the viewing angle were calculated using partial coherence imaging and geometric optical raytracing methods. Additionally, optical aberrations and defocus were considered by the integration of Zernike polynomial coefficients. The measurement system is able to measure objects with a size of 50 μm in all dimensions with an accuracy of ± 5 μm. To manage the issue of a low depth of field while using an optical high resolution system, a wavelength dependent aperture was integrated. Thereby, we are able to control depth of field and resolution of the optical system and can use the borescope in measurement mode with high resolution and low depth of field or in inspection mode with low resolution and higher depth of field. First measurements of a demonstrator system are in good agreement with our simulations. KW - borescope KW - 3D measurement KW - triangulation KW - lens design KW - calibration KW - defect Y1 - 2016 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:526-opus4-15307 SP - 51 EP - 56 PB - SPIE ER -