Homemade DIY 3D Description Laser Pointer
The device is based on high school geometry, both knowing the relationship between the 3000mw blue offset line laser and the distance from the camera, and using the quadratic equation as a function of the measured offset. The two line lasers move left and right when the rotating object has the characteristic of being closer or farther from the camera. The large number of laser pointers on the market has been overwhelmed, but most people still choose green laser devices as night lighting in all kinds of presentation fields. I recorded images from line lasers (in a dark room) and determined their corresponding points in space. From the generated cloud points, I generate a mesh. The grid can be 3D printed. Many countries and regions have very strict restrictions on the purchase of green laser pointer, only allowing the use of very low power Class II and Class IIIa laser pointers.
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When astronomy enthusiasts and astronomers point the low-power 5mW high power laser pointer into the sky, laser users must remain vigilant while enjoying the wonderful pleasures of the mysterious outdoor space. Laser pointers should not be used frequently, and prolonged use should not refer to laser stargazing. This time I projected a line laser and a cheap red laser center pointer onto the map and used a linear translation stage to move the camera closer to the center of the platform. This way I know the step size (0.32mm) and I can capture an image of the laser line at each point. I first wrote a program to go through each frame line by line and look for the peak corresponding to where the laser line hit the target object. Once I have collected the points, I will record their position based on the movement towards the platform. As expected, the graph is slightly non-linear due to lensing effects. The linear term relating the beam offset to the position moved towards the platform is close to 2 (1.925 for the left beam and -2.007 for the right beam). When astronomy enthusiasts and astronomers point the low-power 5mW green laser pointer into the sky, laser users must remain vigilant while enjoying the wonderful pleasures of the mysterious outdoor space. Laser pointers should not be used frequently, and prolonged use should not refer to laser stargazing.
2022-01-08 09:59:11
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