I am pretty sure that at that wattage it would not be able to significantly destroy them, you could burn out pixels in the camera but unless you want to stand there for 10+ minutes shining it on the lens I don’t think you’re going to significantly hamper the vision system.

It needs to be more powerful than a class 4 consumer grade device.

Not that you can’t do it, but if you want to do it more effectively I am pretty sure something stronger would be required than a 1 watt device, Ideally you would want something that can just melt the photoreceptor entirely.

To further your efficacy you might want to use something in a wavelength range that is invisible to most cameras since any footage prior to melting is probably still saved somewhere and available to police. No visible beam means it’s significantly harder to pin it on you.Be warned however lasers in that intensity are very dangerous to eyesight and even incidental beam reflections off surfaces can cause damage to eyesight almost immediately, compounding that by making it a wavelength invisible to cameras you are also making it invisible to human eyes making it even easier to accidentally blind yourself without the right eye protection. Though it would be more difficult to aim if you can’t see it (there are ways around this as well such as buying a small camera that can see that wavelength and hooking it up to a video feed you use to aim it, potentially an in glasses screen (these are becoming much cheaper and readily available these days) as now you can order glasses to protect from that wavelength and put the lenses over your screen glasses and see exactly where you are pointing it without any risk of eye damage and very minimal risk of being caught.