FTTH Fiber Optical Fast Connectors
Fiber optic fast connector designed for FTTH. It is a new generation of fiber connector used in assembly. It can provide open flow and precast type, which optical and mechanical specification meets the standard optical fiber connector. It is designed for high quality and high eddiciency for installation, the structure of crimping position is a unique design. The hotest products are SC/APC Fast Connectors and SC/UPC Fast Connectors.
FTTH Fiber Optical Fast Connectors,FTTH SC/UPC Fast Connectors,SC/APC Fast Connectors,LC/APC SM Fast Connectors NINGBO YULIANG TELECOM MUNICATIONS EQUIPMENT CO.,LTD. , https://www.yltelecom.com
Compared with the positioning schemes such as Lighthouse Laser, Big VR and Oculus Constellation, who is the strongest VR positioning?
The positioning of space is a crucial element in VR technology. Currently, the infrared camera-based positioning system used by Oculus’ Constellation, as well as the laser beacon system from HTC/Vive and Da Peng VR, are among the most advanced on the market. While both systems rely on PnP (Perspective-n-Point) solutions, each has its own limitations and ideal use cases, which will be explored in detail below.
Oculus' Constellation system uses a camera-based approach. The headset and controllers are equipped with infrared LEDs that flash in a specific pattern. A special camera captures images at a fixed frequency—Oculus CV1 does this at 60fps. Using the known 3D model of the headset or controller, the system calculates the 3D position and orientation of the LEDs based on their 2D coordinates in the image. This process involves several steps: first, the PC sends a command through the HID interface to activate the LEDs, ensuring they are visible even if partially occluded. Then, the camera records the brightness of each LED, not color, resulting in a grayscale image of 752x480 pixels.
To estimate the 3D position of these points, the system solves a PnP problem. If at least four LEDs are detected, the system can accurately calculate the pose (position and orientation). This is why the headset is covered with multiple LEDs—to ensure sufficient visibility even when some are blocked.
To handle errors in the calculated data, the system compares the generated 2D projection with the original image, refining the result through calibration. To speed up the matching process between 3D models and 2D images, each LED flashes in a unique pattern, enabling fast and accurate identification.
In addition, to reduce motion-related errors, the system fuses PnP results with IMU (Inertial Measurement Unit) data for more stable tracking. However, optical positioning still has limitations—such as sensitivity to ambient light, lower accuracy due to camera resolution, and limited range, typically only suitable for desktop-level VR setups.
In contrast, the Lighthouse laser positioning system used by HTC and others offers higher accuracy, faster response times, and better performance in large spaces. It uses two base stations with rotating lasers that sweep the room in horizontal and vertical directions. By measuring the time it takes for the laser to hit a sensor, the system calculates the exact position and orientation of the headset and controllers.
Da Peng VR further refined this approach by adding three motors per base station, allowing more efficient scanning and reducing the number of sensors needed. This makes the system more stable and cost-effective, especially for multiplayer and educational applications. With shorter scan intervals, the system updates the user's position more frequently, improving responsiveness during gameplay.
While both infrared and laser-based systems have their strengths, laser technology excels in large-scale, multi-user environments. Whether you're playing in a living room or a VR arcade, the choice of positioning system significantly impacts the overall experience. Each solution has its place, but for room-scale VR, laser-based systems like Lighthouse and Da Peng offer superior performance and reliability.