How does Lighthouse technology work? Let me disassemble it for you

How to achieve six degrees of freedom tracking in virtual reality? We all know that traditional inertial sensors can't do this. They can only track the rotation of the head at most; if you want to track the displacement of the head, you need to introduce the optical system. The traditional optical system is camera-type, the camera tracking head marked the mark point to achieve tracking, Oculus's ConstellaTIon system uses the camera + infrared active mark point; and HTC Vive uses a very clever technology. Called Lighthouse, this technology was developed by Valve and is arguably the best VR optical tracking solution.

How does Lighthouse technology work? Let me disassemble it for you

The Lighthouse consists of two base stations: each base station has an array of infrared LEDs, and two infrared laser emitters that rotate perpendicular to each other . The speed is 10ms. The working state of the base station is as follows: 20ms is a cycle, the infrared LED flashes at the beginning of the cycle, the X-axis rotating laser sweeps the entire space within 10ms, the Y-axis does not emit light; the Y-axis rotating laser sweeps the entire 10ms Space, the X axis does not emit light.

How does Lighthouse technology work? Let me disassemble it for you

Valve has a number of light sensors installed on the head display and controller.

The signal is synchronized after the base station's LED flashes, and then the photosensor can measure the time at which the X-axis laser and the Y-axis laser respectively reach the sensor. This time is exactly the time when the X-axis and Y-axis lasers are turned to this particular angle that illuminates the sensor, so the X-axis and Y-axis angles of the sensor relative to the base station are also known; distributed in the head display and controller The position of the photosensitive sensor on the top is also known, so that by the position difference of the respective sensors, the position and motion trajectory of the head can be calculated.

How does Lighthouse technology work? Let me disassemble it for you

This system has many advantages.

The first is that the computing power it needs is very small.

An optical system needs to be imaged, and then the program needs to use image processing to distinguish the mark points in the image. The richer the details of imaging, the higher the image processing power required. Therefore, the infrared camera is simpler than the monochrome camera, and the monochrome camera is simpler than the color camera. Lighthouse uses only time parameters, so it does not involve image processing, and the calculation of the location can be done locally on the device.

How does Lighthouse technology work? Let me disassemble it for you

Here you can find the related products in Pop-Up Greeting Cards, we are professional manufacturer of Pop-up Greeting cards, Pop-Up Music Greeting Card, Pop-Up Musical Cards. We focused on international export product development, production and sales. We have improved quality control processes of Pop-up Greeting cards to ensure each export qualified product.
If you want to know more about the products in Pop-up Greeting cards, please click the product details to view parameters, models, pictures, prices and other information about Pop-Up Greeting Cards, Pop-Up Music greeting card , Pop-Up Musical Cards.
Whatever you are a group or individual, we will do our best to provide you with accurate and comprehensive message about Pop-up Greeting cards!

Pop-up Greeting cards

Pop-Up Greeting Cards, Pop-Up Music Greeting Card, Pop-Up Musical Cards

AST Industry Co.,LTD , https://www.astsoundchip.com