Bare sensor, unless there is anti aliasing filter glued to silicon, but AFAIK it's DSLR's area.
Stripping further is not really an option, not usable as shadow camera as there are modular PCB's perpendicular to the sensor sticking above it's surface. Webcam incoming.



Cable is clamped, moving laptop around has no impact on measurements when camera is stationary.

Thinking about it makes no sense.
Both lasers are focusable, both are set to project same width/size line/dot at 8 meters and 20 cm.
They might be represented as

Laser diodes are not perfect, if one edge is brighter (double line above) average brightness will still be straight line
Pointer produces coupe stray beams right next to the main point, that could be source of the problem.
with line laser i have no idea.