There is provided a flexible guide tube which guides an endoscope or a therapeutic device into an abdominal cavity through the mouth and stomach to conduct an observation or a therapeutic treatment in the abdominal cavity. In various embodiments, a sensor, such as a grip sensor, an inertial sensor, or a pressure sensor included in the video-capture device, or an optical flow algorithm that quantifies visible shake may be used to detect when the video-capture device is disposed on the supporting surface. These expansion handles may be configured to expand or collapse the tree diagram at the node they are adjacent to. The capacitors may stabilize power supply voltages on the power supply lines. Any size shift between the irradiated pattern and the formed resist which can arise in forming a pattern including isolated feature and isolated space portions is reduced, and a high resolution is obtained.