2results about How to "Short light path" patented technology

The application provides a compact laser beam combination quality detection system and method based on a microlens array, which comprises an optical signal detection part and a signal processing system, the optical signal detection part comprises an optical system and a detector, the optical system divides complete laser beams passing through a beam combination system into multiple micro light waves and then converges the multiple micro light waves, the detector detects the light intensity of each micro light wave and records the focus point position, and the signal processing part judges the laser beam combination quality according to the light intensity and the focus point position information obtained by the detector. The compact laser beam combination quality detection system and method based on the microlens array can realize accurate detection of the laser beam combination quality by using only one microlens array and one detector, has a simple structure, a short optical path, and an output signal which does not need complex processing and is convenient to use.

The application provides a laser projection device, a light source comprising a red laser component, a green laser component and a blue laser component, which respectively emit red laser, green laser and blue laser; the red laser component is arranged close to a light outlet of the light source; a static diffusion sheet is arranged in the light path of the combined blue laser and green laser or respectively for the blue laser and the green laser, so that the blue laser and the green laser are first diffused and then combined with the red laser beam; a converging lens group is arranged at the light outlet of the light source, which is used for reducing the spot of the combined three-color laser beam and then emitting the three-color laser beam from the light outlet of the light source; a diffusion wheel and a light receiving component are arranged between the converging lens and the light receiving component, which are used for diffusing the three-color laser beam in the converging state; and the light receiving component is a light guide pipe or a compound eye lens, which is used for homogenizing the three-color laser beam after diffusion. The laser projection device can present a projection picture with high brightness and good color.