In principle, yes: splitting one optical path to multiple sensors is a known idea, similar to how some 3CCD cameras divide light to separate sensors. But doing it between the lens and sensor is difficult in practice.

Main issues:

• Focus distance: IR and visible light do not focus at exactly the same plane, so the two sensors would likely need slightly different positions to both be sharp.
• Sensor/filter compatibility: A normal camera sensor usually has strong IR filtering, so the IR path would need a camera or sensor modified to record infrared.
• Image quality: Putting a beam splitter or tilted glass plate in the converging light path can introduce aberrations such as coma and make alignment tricky.
• Mechanical complexity: You’d need precise alignment and synchronized capture.

So, while it’s theoretically possible, it would be a custom homebrew project with careful optical adjustment required. The simpler and more practical approach is usually to use two separate lens/sensor paths so each can be focused and optimized independently.