Two or more gravitational lenses perfectly aligned with Earth?

[zuz]

TL;DR

2 or more gravitational lenses

Has anyone ever discovered 2 or more gravitational lenses perfectly aligned with earth? So one lens magnifies the galaxies behind it and another lens between the first and earth magnifies it even more? Would you even be able to tell if they were?

 

[renormalize]

TL;DR Summary: 2 or more gravitational lenses

Has anyone ever discovered 2 or more gravitational lenses perfectly aligned with earth? So one lens magnifies the galaxies behind it and another lens between the first and earth magnifies it even more? Would you even be able to tell if they were?

Take a look at the theory paper Viktor T. Toth, Non-coplanar gravitational lenses and the “communication bridge”, which states in §6:
"...in particular, a two-lens system (the so called gravitational lens “bridge”) delivers no advantages, no additional signal amplification over the amplification offered by a single lens near the source."

 

[zuz]

Take a look at the theory paper Viktor T. Toth, Non-coplanar gravitational lenses and the “communication bridge”, which states in §6:
"...in particular, a two-lens system (the so called gravitational lens “bridge”) delivers no advantages, no additional signal amplification over the amplification offered by a single lens near the source."

Thank you.