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. Author manuscript; available in PMC: 2018 Oct 1.
Published in final edited form as: Space Sci Rev. 2017 Jun 12;212(1-2):601–613. doi: 10.1007/s11214-017-0374-4

Figure 6.

Figure 6

The MIGHTI Interferometer. The arms are terminated by identical low-order Echelle diffraction gratings G1 and G2. BS = N-BK7 cube beamsplitter, S1 = Fused Silica Spacer, S2 = CaF2 spacer, P1 and P2 are N-SF57 field widening prisms, PPS = Plane parallel fused silica spacer. The spacers (not shown) consist of hollow frames that are slotted to allow for differential thermal expansion between the elements they support (cf. figure 8).