I'm developing a scanner that uses a laser for edge detection. It will be mounted on a hexacopter that will traverse a short distance through a cave/tunnel system and produce a 3D image. I'm still researching on ways to process this data but i'm thinking of using a edge detection algorithm in MatLab to produce a 3D image. My question is determining the right kind of laser to do this. Because the environment will be in low light conditions this will help out. However, I'm not for sure if something around 75mW is enough or if I need to go up to 10W. Also, I will be testing the device in a building where there will be some light. Here is a link to a site I found that sells lasers. They are just pointers so I'm not for sure if they are powerful enough. http://www.wickedlasers.com/ This is another link that has a 10W laser. I'm not familiar with specifications on lasers and this link defines this laser as a "waterproof 10000mW / 10W focusable burning Blue laser pointer". The word "burning" doesn't sound to great so would like some clarification on this. http://www.dhgate.com/product/new-w...ble-burning/153993729.html#s1-12-1|2367005007 It should be able to perform out to distances of 50meters. Can someone give me some advice and guidance on exactly what laser specifications I need to consider and what might be suitable for this kind of operation.