Related Experiment Video
Updated: Jun 27, 2026
07:03
Medical-grade Sterilizable Target for Fluid-immersed Fetoscope Optical Distortion Calibration
Published on: February 23, 2017
Geometrical camera calibration with diffractive optical elements.
M Bauer1, D Griessbach, A Hermerschmidt
1German Aerospace Center (DLR), Institute of Robotics and Mechatronics, Rutherfordstrasse 2, 12489 Berlin, Germany.
Optics Express
|December 10, 2008
Summary
A novel geometrical sensor calibration method utilizes diffractive optical elements (DOEs) and laser equipment. This approach offers an alternative to traditional calibration grids for 2D sensor arrays and line scanners.
Area of Science:
- Optics and Photonics
- Sensor Technology
- Metrology
Background:
- Traditional geometrical camera calibration relies on physical grids or collimated light sources.
- Existing methods can be cumbersome and may have limitations in precision and applicability.
Purpose of the Study:
- To introduce a new, efficient method for geometrical sensor calibration.
- To present an alternative to conventional calibration techniques using diffractive optical elements.
Main Methods:
- Utilizing diffractive optical elements (DOEs) for calibration.
- Employing laser beam equipment in conjunction with DOEs.
- Applying the method to 2D sensor array systems and line scanners.
Main Results:
- Demonstration of a new geometrical sensor calibration technique.
- Potential for improved calibration accuracy and efficiency.
- Versatility for different sensor types.
Conclusions:
- The proposed DOE-based method provides a viable alternative for geometrical sensor calibration.
- This technique is particularly suitable for 2D sensor arrays and line scanners.
- Further research can explore broader applications and optimizations.
Related Concept Videos
01:16Focusing of Light in the Eye
Light rays enter the eye through the cornea, a transparent dome-shaped tissue that is the eye's outermost layer. The cornea bends or refracts, light rays traveling to the pupil. The shape of the cornea determines how much of the light is bent and whether the image will be focused correctly on the retina at the back of the eye. Once the light has passed through both refraction layers, it converges into a single focal point onto a small area. This is where photoreceptors start transforming...
01:11Glassware Calibration
Accurate calibration of glassware, such as volumetric flasks, pipettes, and burettes, is essential to ensure accurate measurements in the analytical laboratory. Calibration helps maintain consistency across measurements and prevents errors arising from inaccurate volumes.
Volumetric flasks: Volumetric flasks are designed to prepare aqueous solutions of precise volumes accurately with a calibration line on the neck. To calibrate a volumetric flask, it is important to fill it with distilled...
Volumetric flasks: Volumetric flasks are designed to prepare aqueous solutions of precise volumes accurately with a calibration line on the neck. To calibrate a volumetric flask, it is important to fill it with distilled...
01:26Influence of Earth's Curvature and Atmospheric Refraction on Leveling
During leveling, the Earth's curvature and atmospheric refraction introduce deviations in the line of sight from a true horizontal reference. When the line of sight is leveled, it remains perpendicular to the plumb line only at a single point. Beyond this, it deviates due to the Earth’s curvature, represented by the correction C. For a sight distance D, the deviation can be derived using the relationship:This relationship shows that the deviation increases quadratically with distance. Over a...