Progress on 1.8m Telescope with 127-element Adaptive Optics at IOE

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Presentation transcript:

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

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

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

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

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

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

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

1.8m Telescope Structural Properties Summary Total High： 7.2m Azimuth Motion Diameter：4.7m Total Weight： 25T Azimuth Inertia： 43263.7kg.m2 Elevation Inertia：10461.2kg.m2 2018/11/20 Institute of Optics & Electronics Chinese Academy of Sciences

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

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

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

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

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

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

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

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

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

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

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

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

3D Structure of Elevation Shaft Primary Optical System Weight： 6960kg Moment of Inertia：10461kg.m2 U Shape Mount Weight： 12023.3kg Moment of Inertia：29958kg.m2 Total Weight： 18983.3kg Total High： 5.7m Total Motion Diameter ： 4.7m 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

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

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

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

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

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

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

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

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

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

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

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

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

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

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