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Medical-grade Sterilizable Target for Fluid-immersed Fetoscope Optical Distortion Calibration

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Published on: February 23, 2017

Cross-diffractive optical elements for wide angle geometric camera calibration.

Simon Thibault¹, Aymen Arfaoui, Pierre Desaulniers

¹Center for Optics, Photonics and Lasers, Laval University, Québec, QC, Canada. simon.thibault@phy.ulaval.ca

|December 20, 2011

Summary

This summary is machine-generated.

This study introduces a cost-effective method for camera calibration using two large diffractive optical elements (DOEs). This technique expands the calibration field of view for wide-angle aerial cameras, overcoming previous limitations.

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Area of Science:

Optics
Photogrammetry
Optical Engineering

Background:

Diffractive optical elements (DOEs) enable camera calibration via 2D diffraction grids.
Current DOE fabrication limits accuracy, functionality, and camera/angle scope.

Purpose of the Study:

To present a low-cost solution for enhancing camera calibration using commercially available DOEs.
To expand the calibration field of view for wide-angle aerial cameras.

Main Methods:

Utilized two large, commercially available, crossed phase DOEs generating 15x15 dot grids.
Employed primary and secondary diffractive orders as calibration targets.
Developed a technique to overcome DOE fabrication limitations.

Main Results:

Demonstrated a valuable calibration tool for wide-angle aerial cameras.
Successfully expanded the calibration field of view beyond primary orders.
Achieved accurate camera calibration using secondary diffractive orders.

Conclusions:

The proposed method offers a cost-effective approach to camera calibration.
Leveraging secondary diffractive orders enhances calibration capabilities.
This technique overcomes limitations of traditional DOE fabrication for photogrammetry.