pp. 609-618
S&M954 Research Paper of Special Issue https://doi.org/10.18494/SAM.2013.924 Published: December 16, 2013 Application of Nanoimprint Technology to Diffraction Grating Scale for Microrotary Encoder [PDF] Toshihiro Takeshita, Takuma Iwasaki, Eiji Higurashi and Renshi Sawada (Received June 13, 2013; Accepted September 2, 2013) Keywords: nanoimprint, optical MEMS, rotary encoder, diffracting grating
Using nanoimprint technology, we developed a rotary diffraction grating scale, which is used for microrotary encoding. The off-center error between the center of the throughhole for inserting a rotational axis and the center of the high-precision micropattern on the periphery of the scale is less than 3 µm because we are able to shape the through-hole and the grating pattern simultaneously. The rotary grating is of sufficient accuracy to use as the scale in a microrotary encoder. The use of nanoimprinting is groundbreaking, in view of the traditionally poor centering precision of grating scale through-holes fabricated by conventional photolithography coupled with the machining of throughholes.
Corresponding author: Toshihiro TakeshitaCite this article Toshihiro Takeshita, Takuma Iwasaki, Eiji Higurashi and Renshi Sawada, Application of Nanoimprint Technology to Diffraction Grating Scale for Microrotary Encoder, Sens. Mater., Vol. 25, No. 9, 2013, p. 609-618. |