Advantages and Inventions of Laser Range Finder Measurement-General Knowledge of Optical Instruments

Laser range finder measurement method has the following advantages.
1. There is no blind area based on the energy emitted to the object.
2. There are no restrictions on the surface properties (color, texture and texture).
3. Absolute measurements can be made directly.

4. Easy measurement

In 1969, Hildebrand and Haines proposed a new method based on coherent optics.
Full information contour technology using dual wavelength light source is introduced. It can generate contours on objects.
The resolution of the contour depends on the wavelength of the light source and cannot be changed arbitrarily. Hildebrand
Another method proposed by Haines is generated by two point light sources with different wavelengths.The interference fringes generate contours on objects. Compared with the first method, the second method produces contours.The resolution of raw contour map can be changed from wavelength level to homometer level. For dual light source systems, Generally speaking, the main problem is that if there are some "whirlpools" on the object, the specific area.The holographic contour map will not be clearly depicted.

Coherent measurement method requires very high measurement environment and can only be measured under laboratory conditions.
It is not easy to realize automation.
Because there are some difficulties in the barium-0 method and the coherence measurement method of Laser Rangefinder.
The shortcomings of triangulation method have been paid attention to. The triangulation system can be further divided into active system and passive system.