Fig. 2
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Cross-section of a NISP grisms. The prism wedge (light blue) has an added curved basis surface onto which the filter coating is deposited (yellow), while the grooves of the dispersion grating (dark blue) are directly engraved onto the flat hypotenuse surface of the prism. The grisms are characterised by their prism angle (A), the groove height (H), and the blaze angle (β).
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