What Are The Types Of DOE Laser Module?

A Structured Light DOE Laser Module refers to a laser module that can output a specific structured light. We provide a wide variety of structured light modules, including multi-line structured light DOE modules, random lattice structured light modules, two-dimensional lattice structured light laser modules, circular and circular lattice DOE laser modules, cross Line DOE laser module. It can be used in face recognition, 3D scanning, structured light 3D imaging and other fields.

1. Point spot structured light laser

The point spot can only obtain the depth data of one point of the measured object at a time. To obtain the complete imaging data of the entire measured object, it needs to scan the horizontal and vertical planes point by point many times. The work efficiency is low and time-consuming, but it is better than the cost performance High, simple algorithm, low calculation complexity, it is very suitable for sweeping robots to scan simple terrain environments, and improve the obstacle avoidance ability of sweeping robots.

2. One-line structured light laser

Compared with the point spot structured light laser, the working efficiency has been improved, and more complete imaging data of the measured object can be obtained with fewer scans, but there are also some difficulties. For example, if the measured object has a complex appearance, Potholes or concave surfaces have large curvature changes, which may cause signal loss of structured light within the camera's field of view, resulting in inaccurate measurement data and serious errors. It is a commonly used laser light source for ID card recognition machines, fingerprint recognition machines, and floor sweepers. one.

3. Multi-line structured light laser

It emits multiple densely arranged one-line lasers to form a surface laser, which can scan the position and depth data of a large area of the measured object at one time through triangulation, thereby speeding up the construction of the three-dimensional space. It is commonly used in testing instruments, 3D scanning Instruments, industrial production quality inspection.

4. Grid line structured light laser

By further evolving from the multi-line structured light, the horizontal laser and the vertical laser are vertically intersected to form a neat grid of a certain size. This grid line structured light laser can adjust the number of grids. Generally, 4*4, 16*16, 32*32, and 64*64 gradually increase, which is suitable for use scenarios with certain requirements for cost performance, accuracy, and efficiency: lidar, 3D imaging equipment, machine vision, etc.

5. Speckle structured light laser

Speckle structured light lasers are more common. This type of laser is used for facial biometric information recognition. The number of speckle laser points is between 1,000 and 100,000, and the speckle laser points must be randomly distributed. Traditionally, speckle laser points The more spot laser points, the more coordinates and depth information of the measured object can be obtained, which can be used for advanced purposes such as high-precision biometric identification and 3D model construction through data.

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