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Optical systems for defining the viewing and measuring fields in luminance/radiance meters.
Applied Optics
|February 2, 2010
Summary
This study reviews optical systems for luminance and radiance measurement instruments. An optimal system using a novel mirror disk design with elliptical apertures is presented for improved field definition and measurement accuracy.
Area of Science:
- Optical Engineering
- Metrology
- Photometry
Background:
- Luminance and radiance measuring instruments rely on optical systems to define viewing and measuring fields.
- Versatile instruments require optical systems capable of defining multiple field sizes.
Purpose of the Study:
- To review existing methods for defining fields in optical measurement instruments.
- To explore and evaluate new systems for improved performance.
- To present an optimal system design based on comparative analysis.
Main Methods:
- Review of existing techniques like beam splitter/reticle and fiber light pipe approaches.
- Comparative evaluation based on efficiency, field unambiguity, alignment accuracy, and polarization.
- Exploration of novel optical system designs.
Main Results:
- Existing methods have limitations in versatility and accuracy.
- An optimal system utilizes a mirror disk with elliptical apertures.
- This design allows simultaneous measurement and viewing with high accuracy.
Conclusions:
- The mirror disk system offers superior performance for luminance and radiance measurement.
- This novel approach enhances efficiency and alignment accuracy.
- A new instrument based on this optimal system is described.
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