| 摘要 |
The device (1) has a high-strength draw pin (2) structured to be disconnectably coupled to a highly sensitive optical element and movable via a water hydraulic piston to define a prestressing force in the element. The pin is disconnectably coupled to a bleed screw (7) via a threaded connection. The piston is sealed with a set of O-rings (5), and a connecting adaptor (6) releasably couples a high-pressure water hand pump to the device for generating a water hydraulic pressure. A calibrated pressure sensor detects and documents the water hydraulic pressure. An independent claim is also included for a method for prestressing a threaded assembly in a screw prestressing device. |
