Brief introduction

　 The lab is used to measure, calibrate and develop micro-displacement equipments and devices, it is one of high-technology labs with the highest measurement resolution and precision in China。

　　The lab has 2 research fellows (electronics and computer automation), 1 doctor (photoelectron technology), three postgraduates.

Research field

1): measurement and calibration of high precision displacement or length apparatus in astronomical telescope;

2): high precision displacement actuator in segmented mirror system;

3): high precision displacement sensor in segmented mirror system;

4): following with the international advanced telescope technology to develop new technology.

1): Clean room with constant temperature and humidity

Specification:

•  operating temperature range: 20 ～ 25 ℃ ; stability: ± 0.2 ℃ , uniformity: ± 0.2 ℃ ;

•  humidity: 50 ± 5%;

•  clean degree: about 2000 degree.

2): Dual-frequency laser interferometer

Type: JENAer ZLM800 (all optical parts are made by ZEISS), specification as follows:

•  measurement range: 0~40m;

•  resolution: 1.25nm;

•  precision: 15nm;

•  relative precision: 0.22ppm;

•  maximum velocity: 3.2m/s;

•  wavelength stability: 2 × 10 -9 (1 hour), 2 × 10 -8 (lifetime).

3): Virtual instrument

•  software: Labview 7.1;

•  hardware: multimeter, oscilloscope, signal generator, motor controller, data acquisition card