u = -x1
v = +(D – x1)
1/D – x1 – 1/(-x1) = 1/f
u = -x2
v = +(D – x2)
1/D – x2 – 1/(-x2) = 1/f
D = x1 + x2
d = x2 – x1
x1 = D – d/2
D – x1 = D + d/2
u = D/2 + d/2
v = D/2 – d/2
m1 = D – d/D + d
m2/m1 = (D+d/D-d)2
u = -x1
v = +(D – x1)
1/D – x1 – 1/(-x1) = 1/f
u = -x2
v = +(D – x2)
1/D – x2 – 1/(-x2) = 1/f
D = x1 + x2
d = x2 – x1
x1 = D – d/2
D – x1 = D + d/2
u = D/2 + d/2
v = D/2 – d/2
m1 = D – d/D + d
m2/m1 = (D+d/D-d)2