VST (Video See-through) is a function that uses the camera to capture a real-time view of the surrounding environment and display it on the screen, giving users the feeling of seeing the real world around them directly through the XR headset. With the continuous development of the XR industry, it has gradually become an industry trend for VR headsets to be equipped with VST functions. The VST function gives users an experience that goes beyond traditional vision, opening up a new dimension for the application and development of XR.

Previously, there was no mature solution for VST performance testing and evaluation in the industry, and how to measure and accurately measure the virtual-real depth and virtual-real-time delay in VST scenarios has become a pain point in VST performance testing. In order to solve the difficulties faced by VST performance testing, CTTL-Terminal Labs and S-Dream Lab jointly developed the VST performance test solution VST-1000 for one year. This solution can test the spatial distance and virtual real-time latency of VR headsets in VST mode, providing developers with accurate test data and facilitating the development and production of VR headsets.

In order to ensure that the testing process can be based on a highly consistent inspection benchmark, the VST test solution introduces a rigorously simulated and measured millimeter-level high-precision motion module and a customized headform, the former for fully automated eye point (also known as sweet spot) finding, and the latter for the fixation of most DUTs (devices under test).

The implementation of automatic eyepoint lookup not only enables different DUTs to have the same test benchmark, but also avoids the impact of human factors on the stability of the test to the greatest extent, and ensures the accuracy and objectivity of the results.

In VST scenarios, latency and depth of field are the two key factors affecting the user experience, and in the VST test solution, a high-precision frame rate test system and an ultra-low latency humanoid fast autofocus imaging system are introduced to achieve VST delay performance detection in the range of 0-333ms and VST depth performance detection in the range of 0.2-5m.

The successful development of the VST-1000 test solution fills the industry gap in the VST performance testing of VR headsets, and will help VR headset companies improve the efficiency of product testing and verification, shorten the product development and production cycle, and promote the continuous improvement of VR headset performance. Subsequently, CTTL Terminal Labs will carry out more in-depth technical research cooperation with S-Dream Lab in the field of XR testing, jointly prepare for the establishment of an extended reality joint evaluation laboratory, and promote the formulation, implementation and implementation of key industry standards in the field of extended reality with innovative technologies and leading test solutions.