This thing is apparently a laser russian prototype tank developped in the late 70's.
On the wikipedia page of the tank, we learn that it's a laser projector mounted on a T80 hull.
However, I quote :
The tank used an intense laser beam to attack vehicles. This was created by focusing light through thirty kilogram artificial rubies (which made the whole system very expensive to produce). The optics that produced the laser were placed at the end of a silver coated spiral, which helped amplify the beam and increase convergence. The energy to power the laser was provided by a generator and an auxiliary battery system. The lenses themselves were able to operate in different environments by moving metal caps closer to protect the lens.
Until this, the only real laser weapon i've ever heard of is the nothrop grumann one. it's an anti missile weapon, aiming to only perforate a small hole in the hull/daze the sensor, disorienting it, and why not heat it enough to detonante the fuel/explosive.
And even know, one of the main issue is the power need of the laser (>100kw), which is why it's used only on ships.
A laser mounted on a tank (ok...) with the objective to dig a hole in tank's armour ? Seems higly doubtfull to me.
120mm of steel instead of 1 of Aluminium...
The japanese version of wikipedia isn't helping either.
So, someone have more docs on this thing ? Only one i found are in russian/other language i don't know.