Publications

Displaying 1 - 4 of 4

A method to evaluate orientation-dependent errors in the center of contrast targets used with terrestrial laser scanners

January 16, 2025

Author(s)

Balasubramanian Muralikrishnan, Xinsu Lu, Mary Gregg, Katharine Shilling, Braden Czapla

Terrestrial laser scanners (TLS) are portable dimensional measurement instruments used to obtain 3D point clouds of objects in a scene. While TLSs do not require the use of cooperative targets, they are sometimes placed in a scene to fuse or compare data

Laser tracker and terrestrial laser scanner range error evaluation by stitching

May 7, 2024

Author(s)

Balasubramanian Muralikrishnan, Braden Czapla, Vincent Lee, Craig Shakarji, Daniel S. Sawyer, Saure Matthias

Laser trackers (LTs) are dimensional measurement instruments commonly employed in the manufacture and assembly of large structures. Terrestrial laser scanners (TLSs) are a related class of dimensional measurement instruments more commonly employed in

Direct method of extracting broadband complex refractive index from spectrophotometric measurements: an application to polydimethylsiloxane for passive radiative cooling

September 23, 2021

Author(s)

Braden E. Czapla, Leonard Hanssen

We describe an algorithm to extract the complex refractive index of a material from broadband reflectance and transmittance measurements taken by spectrophotometers. The algorithm combines Kramers-Kronig analysis with an inversion of Fresnel's equations to

Direct method of extracting complex refractive index from routine Fourier transform infrared reflectance/transmittance measurements

August 20, 2020

Author(s)

Braden E. Czapla, Leonard M. Hanssen

We describe an algorithm to extract the complex refractive index of a material from reflectance and transmittance measurements commonly taken by spectrophotometers. The algorithm combines Kramers- Kronig analysis with an inversion of Fresnel's equations to

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