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High-accuracy translation-rotation encoder with two gratings in a Littrow mount
M Nevièvre1, E Popov, B Bojhkov
1Laboratoire d'Optique Electromagnétique, Unité Propre de Recherche de l'Enseignement SupérieurAssociée, Faculté des Sciences de St-Jérôme, Case 262, Centre National de la Recherche Scientifique 6079, 13397 Marseille Cedex20, France.
Applied Optics
|February 29, 2008
Summary
A novel translation-rotation encoder utilizes two dielectric gratings for high-accuracy measurements. This design enables cost-effective, precise industrial applications in mechanics and information processing.
Area of Science:
- Optics and Photonics
- Mechanical Engineering
Background:
- High-precision encoders are crucial for advanced mechanical systems and information processing.
- Existing encoder technologies can be expensive or limited in accuracy.
Purpose of the Study:
- To propose a new type of translation-rotation encoder.
- To achieve high accuracy using cost-effective components.
Main Methods:
- The encoder employs two identical transparent dielectric gratings.
- A -1-order Littrow mount configuration is used.
- The wavelength-to-groove-spacing ratio is optimized to produce two interfering beams.
Main Results:
- The proposed mounting ensures high visibility interference across various experimental conditions.
- The system allows for the use of inexpensive photoresist or plastic gratings.
- High-accuracy encoder performance is demonstrated.
Conclusions:
- The developed encoder design offers a cost-effective solution for high-precision measurement.
- This technology has significant potential for industrial applications in precision mechanics and information processing.
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