Table 1. Conversion Between Equivalent Interferometer Configurations.

Actual configuration	Equivalent, simpler configuration	Image on detector plane
C2: cone beam normal incidence	C1: Parallel beam normal incidence
R0	∞	I1’(x2(R0 + R1)/(R0 + R1 + R2), y2(R0 + R1)/(R0 + R1 + R2))
R1	R1(1 + R1/R0)
R2	R2(R0 + R1)/(R0 + R1 + R2)
θn = (90°, 90°, 90°)	θn = (90°, 90°, 90°)
G0(x0, y0)	G0(x0/(1 + R1/R0), y0/(1 + R1/R0))
G1(x1, y1)	G1(x1, y1)
C3: Cone beam oblique incidence	C2: Cone beam normal incidence	I2’(x2sinθ, y2)
Rj	Rj
θn = (θ, θ, θ)	θn = (90°, 90°, 90°)
Gm(xm, ym)	Gm(xm/sinθ, y0)
C4: Cone beam oblique incidence, non parallel planes	C3: Cone beam oblique incidence, parallel planes	I3’(x2{1-[(1 + R2/R1)δ1-δ2]cotθ}, y2{1-(1 + R2/R1)δ1cotθ})
R0	R0[1 + (R0/R1)δ1cotθ]
R1	R1(1-δ1cotθ)
R2	R2[1-(2 + R2/R1)δ1cotθ]
θn = (θ, θ + δ1, θ + δ2)	θn = (θ, θ, θ)
G0(x0, y0)	G0(x0, y0)
G1(x1, y1)	G1(x1, y1(1 + δ1cotθ))