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The efficiency of the INT IDS is best considered as the product of three components; collimator, grating and camera. The efficiencies of the 3 collimators available are plotted in Figure 2.3, and the efficiencies of the various gratings are plotted in Figure 2.4. The efficiencies of the 2 cameras are discussed in Chapter 3.
Figure 2.3: Efficiency curves for the IDS collimators.
Figure 2.4: Grating efficiencies as a function of wavelength.