The quick answer is that you can use Glass, Acrylic or PMMA or polycarbonate.
But a more complete answer would include the qualities of a good coverglass.
A qualities that make a good coverglass are:
- •Clear – transparent to 940nm light.
- •Glass, Acrylic, PMMA and polycarbonate (PC) are good choices.
- •Close – The closer the glass is to the sensor the better.
- •Try for an air gap of less than 1mm.
- •Parallel – try to keep the glass parallel to the sensor
- •Thin – The thinner the better.
- •1mm is a good thickness.
- •Smooth – the texture of the glass should be flat as possible - haze
- •Clean – Fingerprints and dirt will make things difficult.
- •Consistent – Glass quality and air gaps should be consistent.
I’ve never seen a customer get all of these right, but try. All these qualities are additive, so you can get a couple of the 'wrong', but they add up.
You can also buy a coverglass from a company called Hornix in Tiawan.
Or from:
https://www.gilisymo.com/cover-glass/17-vl53l1xcoverglassnolightblock.html
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