echelle grating

(physics) A form of diffraction grating optimized for high orders of diffraction

Japanese Meaning

高次回折に最適化された回折格子

The spectrograph's resolution improved dramatically after replacing the old grating with an echelle grating designed for ultraviolet wavelengths.

古い格子を紫外線域用に設計された高次回折に最適化された回折格子に取り替えたところ、分光器の分解能は劇的に向上した。

Sense（1）

(physics) A form of diffraction grating optimized for high orders of diffraction

echelle gratings

（ plural ）