1. Progress on 1.8m Telescope with 127-element Adaptive Optics at IOE
Institute of Optics and Electronics,
Chinese Academy of Sciences
2018/11/20
Institute of Optics & Electronics
Chinese Academy of Sciences

2. Outlines Introduction System Configuration 1.8m telescope
127 element AO system
All-solid-state yellow laser for Sodium LGS
Schedule for the system
2018/11/20
Institute of Optics & Electronics
Chinese Academy of Sciences

3. Introduction R&D on AO in China began in 1979.
Several AO systems had been developed by IOE for 1.2m Tel. and 2.16m Tel. respectively.
Presented by Prof. Zhang in details
None AO system with LGS in China is built
A 1.8m telescope and 127 element AO system with LGS is being developed.
2018/11/20
Institute of Optics & Electronics
Chinese Academy of Sciences

4. System Configuration 2018/11/20 Institute of Optics & Electronics
Chinese Academy of Sciences

5. Optical System Diameter: φ1800mm F-number Primary mirror Coude: F/87
Nasmyth: F/14
Primary mirror
Parabolic
F/1.5
2018/11/20
Institute of Optics & Electronics
Chinese Academy of Sciences

6. Coude Optical System 2018/11/20 Institute of Optics & Electronics
Chinese Academy of Sciences

7. Nasmyth Optical System
2018/11/20
Institute of Optics & Electronics
Chinese Academy of Sciences

8. 1.8m Telescope Structural Properties Summary Total High： 7.2m
Azimuth Motion Diameter：4.7m
Total Weight： T
Azimuth Inertia： kg.m2
Elevation Inertia： kg.m2
2018/11/20
Institute of Optics & Electronics
Chinese Academy of Sciences

9. Primary Optical system Assembly
Central Piece
Primary Mirror and Cell
Mirror Cover
Flipper
Secondary Mirror
Elevation Axis
Truss
Hexapod
2018/11/20
Institute of Optics & Electronics
Chinese Academy of Sciences

10. Institute of Optics & Electronics Chinese Academy of Sciences
2018/11/20
Institute of Optics & Electronics
Chinese Academy of Sciences

11. Institute of Optics & Electronics Chinese Academy of Sciences
2018/11/20
Institute of Optics & Electronics
Chinese Academy of Sciences

12. Institute of Optics & Electronics Chinese Academy of Sciences
2018/11/20
Institute of Optics & Electronics
Chinese Academy of Sciences

13. Institute of Optics & Electronics Chinese Academy of Sciences
2018/11/20
Institute of Optics & Electronics
Chinese Academy of Sciences

14. Institute of Optics & Electronics Chinese Academy of Sciences
2018/11/20
Institute of Optics & Electronics
Chinese Academy of Sciences

15. Institute of Optics & Electronics Chinese Academy of Sciences
2018/11/20
Institute of Optics & Electronics
Chinese Academy of Sciences

16. Institute of Optics & Electronics Chinese Academy of Sciences
2018/11/20
Institute of Optics & Electronics
Chinese Academy of Sciences

17. Institute of Optics & Electronics Chinese Academy of Sciences
2018/11/20
Institute of Optics & Electronics
Chinese Academy of Sciences

18. Main Tube at Horizon Pointing Mode 1：38.1Hz
2018/11/20
Institute of Optics & Electronics
Chinese Academy of Sciences

19. Main Tube at Zenith Pointing Mode 1：38.2Hz
2018/11/20
Institute of Optics & Electronics
Chinese Academy of Sciences

20. Main Tube at 45 Degree Elevation Mode 1: 38Hz
2018/11/20
Institute of Optics & Electronics
Chinese Academy of Sciences

21. 3D Structure of Elevation Shaft
Primary Optical System
Weight： kg
Moment of Inertia：10461kg.m2
U Shape Mount
Weight： kg
Moment of Inertia：29958kg.m2
Total Weight： kg
Total High： m
Total Motion Diameter ： m
Drive Shaft
Encoder Shaft
Altitude Adjusting Block
Cooling Fan
Electronic System Box
Outer Cooler
2018/11/20
Institute of Optics & Electronics
Chinese Academy of Sciences

22. Deformed Shape of Elevation Structure by Gravity
2018/11/20
Institute of Optics & Electronics
Chinese Academy of Sciences

23. Mode 1 : 23.45Hz 2018/11/20 Institute of Optics & Electronics
Chinese Academy of Sciences

24. Structure of Azimuth Axis
Hydrostatic support system
Frictional drive
27bit absolute Opto-electronic angular encoder
Inner Installed Conducting Ring
2018/11/20
Institute of Optics & Electronics
Chinese Academy of Sciences

25. Total Weight of Azimuth Structure：10.2T
2018/11/20
Institute of Optics & Electronics
Chinese Academy of Sciences

26. Hydrostatic Bearing Azimuth Drives Leveling Mechanism Conducting Ring
2018/11/20
Institute of Optics & Electronics
Chinese Academy of Sciences
Conducting Ring

27. AO for 1.8m telescope 2018/11/20 Institute of Optics & Electronics
Chinese Academy of Sciences

28. DM and HS design consideration
127 actuators
Triangle arrangement
HS:
13×13
Square arrangement
Near infrared imaging
J band
2018/11/20
Institute of Optics & Electronics
Chinese Academy of Sciences

29. All-solid-state yellow laser
Developed by the Institute of Physics, CAS
1319nm resonator
1064nm resonator
Sum-frequency
2018/11/20
Institute of Optics & Electronics
Chinese Academy of Sciences

30. All-solid-state yellow laser
2018/11/20
Institute of Optics & Electronics
Chinese Academy of Sciences

31. Some main parts of the laser
LD Pumping Laser Head
Acoustic Q-Switch
Drive source
2018/11/20
Institute of Optics & Electronics
Chinese Academy of Sciences

32. 589 nm output power and beam quality factor M2 as a function of diode pump power
2018/11/20
Institute of Optics & Electronics
Chinese Academy of Sciences

33. Yellow beam quality measured at 4.6 W output power
Three-dimensional far-field yellow beam profile
Yellow beam radius near the beam waist for both transverse directions
2018/11/20
Institute of Optics & Electronics
Chinese Academy of Sciences

34. Schedule for the system
2008
Build 1.8m telescope
127 element AO system
2009
Installation of the telescope and AO system
Site: Gaomeigu of Lijiang city of Yunnan prov.
First light
2010:
Na Laser power ~20W
2011:
Na Beacon laser installation for 1.8m telescope
2018/11/20
Institute of Optics & Electronics
Chinese Academy of Sciences

35. Thank you and Welcome to visit IOE, CAS!
2018/11/20
Institute of Optics & Electronics
Chinese Academy of Sciences