Renishaw provides a reliable camera positioning system for virtual reality programming

In the production of virtual reality programs, the positioning of the camera is crucial to the combination of virtual scenes and character activities. Power Plus camera support equipment uses Renishaw encoders to further improve the accuracy and stability of camera position feedback.

China Central Television - Shenzhou 9 live broadcast

VR - Virtual Reality was originally designed for professional training purposes, such as a flight simulator - it allows pilots to be in the cockpit and safely perform driving training in different virtual scenes. After years of improvement and evolution, this technology has slowly integrated into our daily lives. In the radio and film industry, some virtual reality TV programs have also become popular. I believe that you have experienced this wonderful visual technology in some TV news or sports live programs. In the virtual reality program, the scene activity and the virtual scene captured by the camera must be synchronized to create a seamless and realistic picture, wherein the camera's moving position data is especially important. The Power Plus camera support device uses Renishaw encoders to provide a precise and stable camera positioning system for virtual reality programming.

Application of RESR Circular Grating System on Virtual Remote Arm

Headquartered in Hong Kong, Power Plus is a camera support equipment manufacturer affiliated with Jetta Technology Systems, Inc. (DPS), the world's leading manufacturer of Vinten's distributor in China, dedicated to broadcast television. Institutions and companies (such as China Central Television, SONY, etc.) provide complete camera support equipment and virtual video solutions, with more than 20 years of experience in the industry. Mr. Huang Jinchang, Technical Director of Power Plus, explained their relationship with Winton: “Winton is a global market leader. Founded in 1910, it has a long history of more than 100 years and has a worldwide market share of camera support equipment. 80%. Our market positioning is clear. In addition to acting for Yundun products, we also develop new product categories for some niche markets to enhance product diversity.” On June 16, 2012, Power Plus pioneered history. A new page – Working with VIZRT and ORAD, two well-known virtual image system companies, to provide virtual remote arm systems and support services for China Central Television's “Shenzhou Nine Live” program at Jiuquan Studio.

Virtual reality principle

The principle of virtual reality is to use computer to make simulation of actual scenes, which is seamlessly combined with the activities of the characters taken by the camera, so that the audience feels that the characters are like being in the virtual scene. Mr. Huang explained the architecture of virtual reality: “The camera pan/tilt makes the camera move more smoothly and accurately. The virtual production system obtains the camera movement position data through the Renishaw circular grating system and the Winton image tracking box built in the camera pan/tilt. (Location feedback). The data will be directly transmitted to the virtual image system, and the actual image will be analyzed and added with virtual elements (image effects, etc.), and the virtual composite image processed through the system will be video/audio edited according to the previous program. Adjustment and distribution, and then broadcast."

High repeatability and stability

Virtual remote arm system

Camera head

Producing a high-quality virtual reality program requires a highly reproducible camera positioning system. The PowerPlus high-precision camera pan/tilt uses the Renishaw RESR circular encoder system and is equipped with the RGH40 series of non-contact optical readheads, providing repeatability up to one resolution unit. The circular gratings are mounted on horizontal and vertical axes of motion, with multiple diameters, while the low mass and low moment of inertia design further enhances system accuracy and dynamic performance. The grating is mounted directly on the shaft, eliminating mechanical reactions on the backlash and other bearings. Huang said: "Compared with the traditional gear encoder, the non-contact grating provides higher repeatability, which makes the production quality of the virtual reality program significantly improved. We are very satisfied with the performance of the Renishaw encoder. For us, they are synonymous with high precision. At the time, Power Plus chose Renishaw because of the success of its cooperation with Winton. The longer the cooperation, the more the advantages and value of Renishaw." Continued, "We compared the encoders of different brands on the market and found that Renishaw's encoders are the most stable and repeatable. We now understand why the cooperation between Winton and Renishaw is so successful. ”

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