TEM Aligna 4D Manual de usuario

Aligna® 4D User Manual

1 / 84

User Manual

Aligna®4D

Modular Rack Case Version

Version 2.4

TEM Messtechnik GmbH

Grosser Hillen 38

D-30559 Hannover

Germany

Tel.: +49 (0)511 51 08 96 -31

Fax: +49 (0)511 51 08 96 -38

E-mail: [email protected]

URL: http://www.TEM-Messtechnik.de

(07.06.2009, 09.07 2020)

Aligna® 4D User Manual

2 / 84

Aligna® 4D User Manual

3 / 84

Table of Contents

1Introduction ....................................................................................................... 7

2Block Diagram Aligna®4D.............................................................................. 10

3Short Description of the Front Panel Elements............................................ 11

4Principles of Laser Pointing Stabilization..................................................... 12

4.1 Reasons of Pointing Instabilities................................................................. 12

4.1.1 Thermal properties of the laser itself .................................................................12

4.1.2 Thermal movement by the laser cooling system................................................12

4.1.3 Drifts of alignment and folding mirrors...............................................................12

4.1.4 Air turbulences and temperature gradients in the air .........................................12

4.1.5 Thermal effects of optical elements...................................................................13

4.1.6 Mechanically moved optical elements (delay lines, e.g.) ...................................13

4.1.7 Movement of the experimental (optical) tables or vacuum chambers ................13

4.2 2D or 4D Stabilization?............................................................................... 14

4.3 Positioning of Actuator and Detectors........................................................ 17

4.3.1 Setup 1: Two Beam Samplers...........................................................................17

4.3.2 Setup 2: Second Mirror Acts as Beam Sampler.................................................17

4.3.3 Problems with Beam Sampler Plates ................................................................17

4.3.4 Setup 3: High Reflecting Mirror Acts as Beam Sampler.....................................18

4.3.5 Setup 4: Only One Beam Sampler Mirror..........................................................19

4.3.6 Setup 5: Compact 4D Sensor "PSD 4D"............................................................19

4.3.7 Setup 6: "PSD 4D" with Beam Sampler Wedge Plate........................................19

4.3.8 Distance between A1 and A2............................................................................20

4.3.9 Position of the Detector(s).................................................................................20

5Some Typical Configurations......................................................................... 25

5.1 2D System (Angle Stabilization)................................................................. 25

5.2 2D System (Long Path).............................................................................. 25

5.3 4D System.................................................................................................. 26

5.4 4D System with Long Beam Path............................................................... 26

5.5 Auto-Alignment and 2D stabilization........................................................... 27

5.6 Auto-Alignment and 4D stabilization........................................................... 28

5.7 Overlaying Two or More Laser Beams Independently................................ 28

5.8 Overlaying Two Laser Beams, Commonly Stabilized Path ........................ 29

5.9 Overlaying Three Laser Beams with Commonly Stabilized Path................ 30

5.10 Comparison of some Setups...................................................................... 31

6Pulsed Lasers.................................................................................................. 32

Aligna® 4D User Manual

4 / 84

6.1 Repetition Rate Categories ........................................................................ 32

6.1.1 CW Lasers........................................................................................................32

6.1.2 CW Lasers with Intensity modulation (5 kHz to 200 kHz) ..................................33

6.1.3 Pulsed Lasers with Slow Repetition Rates (1 Hz … 3 kHz) ...............................33

6.1.4 Pulsed Lasers with medium repetition rates (3 kHz … 15 kHz) .........................33

6.1.5 Pulsed Lasers with high repetition rates (>15 kHz … > 1 GHz) .........................34

7Input CrossLink Matrix (ICL) .......................................................................... 35

8Output CrossLink Matrix (OCL)...................................................................... 35

9Setting up an Aligna®Test System................................................................ 36

9.1.1 Cable Connections:...........................................................................................38

10 Setting up the Aligna®System by Help of Kangoo....................................... 41

10.1 Some basic Kangoo features ..................................................................... 41

10.1.1 Installation of Kangoo........................................................................................41

10.1.2 Buttons and Devices .........................................................................................41

10.1.3 Sections............................................................................................................42

10.1.4 Hotkeys.............................................................................................................42

10.1.5 Further Kangoo Functions.................................................................................43

10.2 Main Aligna®Configurations....................................................................... 44

10.2.1 Configuration "Aligna User Menu" ("BL Menu") .................................................44

10.2.2 Configuration "BeamLock Basic".......................................................................45

10.3 Some Common Sections............................................................................ 47

10.3.1 PSD Input Section.............................................................................................47

10.3.2 PSD Input Section.............................................................................................48

10.3.3 "Physical Units" Section....................................................................................51

10.3.4 "Calibration" Section..........................................................................................51

10.3.5 "3D Beam" Section............................................................................................52

10.3.6 "3D Beam" Section............................................................................................53

10.3.7 "Thresholds" Section.........................................................................................53

10.3.8 "Hidden Parameters" Section............................................................................54

10.3.9 "OCLM" (Motors Output Crosslink Matrix) Section.............................................55

10.3.10 Alignment of the "OCLM" Matrix (Output CrossLink Matrix of Motorized

Actuators) 57

10.3.11 Alignment of the Piezo OCL Matrix OCLP (Piezo’s Output Crosslink Matrix) .65

10.4 Storing and Recall of the Individual Parameters......................................... 68

10.4.1 Recall of the (User-Specific) Default Parameters ..............................................68

10.4.2 Storing the actually defined Parameters as Default Parameters (into the µC's

FlashEEPROM)...............................................................................................................68

10.4.3 Defining the Hardware-Specific Parameters......................................................69

Aligna® 4D User Manual

5 / 84

10.5 Configuration "Beam Alignment Scope"..................................................... 72

11 Safety Instructions .......................................................................................... 73

12 Delivery content............................................................................................... 74

12.1 Delivery content Aligna®:........................................................................... 74

12.2 Delivery content PSD 2D:........................................................................... 74

12.3 Delivery content PSD 4D e:........................................................................ 74

12.4 Delivery content PSD 4D i:......................................................................... 74

12.5 Delivery content BeamScan OneInch:........................................................ 74

12.6 Delivery content Motorized Mirror Mounts (MMMs):................................... 75

13 Technical Data................................................................................................. 76

13.1 Environmental conditions: .......................................................................... 76

13.2 Aligna®4D Module Rack Case Properties ................................................. 76

13.3 Detector properties PSD 2D (Detector A, or Detector B)............................ 77

13.4 Detector properties PSD 4D i..................................................................... 77

13.5 Actuator properties BeamScan 2D One Inch ............................................. 77

13.6 Aligna 60 Motorized Mirror Mount .............................................................. 78

13.7 Aligna 40 Motorized Mirror Mount .............................................................. 78

13.8 Used Mirrors............................................................................................... 79

14 Connectors and Cables .................................................................................. 80

14.1.1 Mains power cable ............................................................................................80

14.1.2 Connection of the Detectors and Actuators.......................................................80

15 Customer service ............................................................................................ 81

Aligna® 4D User Manual

6 / 84

Aligna® 4D User Manual

7 / 84

1 Introduction

Laser beams, used in an experiment or in industrial applications, can move in space by many

reasons:

1. Thermal properties of the laser itself

2. Thermal movement by the laser cooling system

3. Drifts of alignment and folding mirrors

4. Air turbulences and temperature gradients in the air

5. Thermal effects of optical elements

6. Mechanically moved optical elements (delay lines, switching mirrors, motorized tele-

scopes, …)

7. Movement of the experimental (optical) tables or vacuum chambers

(In the chapter “Reasons of Pointing Instabilities” these topics will be discussed in more detail.)

The laser beam pointing stabilization system Aligna®compensates for all of these disturb-

ances. The laser beam position and its angle are measured by the 4D position sensitive detec-

tor PSD 4D in four degrees of freedom (two beam positions “X” and “Y”, and two angles “”

and “”). The position of a (collimated) laser beam is characterized by these four values, like a

line in space. The measured deviation signals of the laser axis with respect to the reference

axis are processed continuously by the Aligna®electronics. Herein control signals for four

piezo actuators of the BeamScan mirrors and/or motorized mirror mounts (Aligna60, e.g.) are

generated. Two 2D movable mirrors, which control these four degrees of freedom in four fast

closed lock loops keep the laser beam exactly at the reference axis.

Aligna®is a modular system, consisting of different elements, which can be adapted to the

individual application: Different types of scanners (with various values of displacement, beam

diameters, mirror types, movement speeds) and different types of PSDs (Position Sensitive

Laser

Cooling System

1: thermal drifts

inside the laser,

movements by

frequency detuning,

by power variation

2: thermal drifts

of cooling system

and mechanical mounts

3: drifts of alignment

and folding mirror

holders 4: air fluctuations and

temperature gradients

6: moved optical elements

(delay lines, switching mirrors,

motorized telescopes,...)

7: Movement of the experimental

(optical) tables or vacuum chambers

5: thermal effects in

optical elements and

mirrors

Target

Laser

BeamScan 2D

1PSD 4D

BeamLock®

electronics

BeamScan 2D





Beam Splitter

to Experiment

Aligna® 4D User Manual

8 / 84

Detectors) with various types of sensors (wavelength, beam diameter, resolution, dimensions,

QUAD detectors, duo/tetra lateral PSDs, or CCD/CMOS cameras) are available.

In some applications a 2D stabilization (instead of 4D) may be suitable. In this case only one

2D scanner BamScan 2D is necessary. (This reduction, however, can be more critical and

takes more effort in positioning the PSD. Please refer to chapter “2D or 4D stabilization”!)

Aligna®4D electronics 4D detector PSD 4D e

BeamScan2D with different mirror shapes, 1-inch and square bodies

Elliptical mirror 22 x 32 mm, (5mm thick), fitting into std 1-inch mirror holder

Aligna® 4D User Manual

9 / 84

rectangular broadband mirror 15 x 20 x 2.5 mm, in rectangular corpus

Half-inch mirror, rectangular corpus

Aligna®also can be controlled by a PC or by other electronic

devices within a control system. In this case both the 2D beam

position and the 2D beam direction can be set by the control

system; a very precise stabilized 2D or 4D fast scanning of the

laser beam is possible.

Via the USB or serial interface, the following parameters can be

set and controlled:

Switching each servo channel on or off

control of the set points (position X, Y, and angle , )

Gain of the PSD amplifiers (sensor sensitivity)

…

For detailed information please consult the Software Manual.

In addition all relevant signals (4D position signals, 4D error signals, 4D regulation signals,…)

can be read as analog signals or via USB interface.

Aligna® 4D User Manual

10 / 84

2 Block Diagram Aligna®4D

In the following, the block diagram of the Aligna®4D electronics is described.

Note: This chapter is preliminary: It still contains additional information related to former ver-

sions.

Two 2D sensors “PSD 2D” (or one 4D sensor “PSD 4D”) detect both 2D position (“X”, “Y”)

and 2D angle (“”, “”) of a laser beam. The detector electronics contain (dependent on the

detector type):

The position sensitive chip: A variety of detector sizes and types is available: 2x2 mm,

4x4 mm, 9x9 mm, 12x12 mm, others on request, as well as quadrant detectors of different

sizes. Different speed options are available, please refer to PSD manual.

The detectors are located at a small PCB, which also contains transimpedance amplifiers

and filter networks to achieve very linear low noise robust signals.

The detectors are connected with the cables “PSD 1” to “PSD 4” with the Aligna®4D electron-

ics, which contains following functions.

signal range and clip check for each channel Ax, Ay, Bx, By

Input Cross-link Matrix circuitry (ICL Matrix) (calculation of pure Angle and BeamPosition

signals)

Set point definition (SetpAx, SetpAy, SetpBx, SetBy), fixed, external analog control or digital

control (including test generator)

Error calculation (4D actual position –4D set position)

Gain and regulator control logic

Four PIDT2regulators

Output Cross-link Matrix circuitry (OCL Matrix) (calculation of the combination movement)

Monitor multiplexer for observation of all relevant signals



HV Piezo amplifiers

Motor Drivers

MicroController Module, including USB Interface, Serial Interface, (Ethernet optionally)

Power Supply

Tabla de contenidos

Otros manuales de Equipos industriales de TEM

TEM

TEM uAligna Manual de usuario

TEM

TEM FiberLock Manual de usuario

TEM

TEM PhaseLock Manual de usuario

Manuales populares de Equipos industriales de otras marcas

ABB

ABB Unifix AD Manual

Mark 7

Mark 7 Evolution Manual de usuario

Husky

Husky HyPET Manual de usuario

bora

bora PM-1800 Manual de usuario

Grizzly

Grizzly T32428 Manual de usuario

Siemens

Siemens 8MF1 Series Manual de usuario

ABB

ABB HT610965 Manual de usuario

ABB

ABB SafeLink Manual de usuario

Phoenix

Phoenix PHX-150 Manual de usuario

ABB

ABB A165-L32 Manual de usuario

ABB

ABB HT842936 Manual de usuario

Rioned

Rioned UrbanJet Manual de usuario

Hermetica

Hermetica 10 Series Manual de usuario

HORNER

HORNER OEE Solution Manual de usuario

Hammerhead

Hammerhead HG375 Manual de usuario

SCHUNK

SCHUNK VERO-S NSE-A3 138 Instrucciones de uso

ABB

ABB HT566657 Manual de usuario

Webasto

Webasto GSE CAN Manual de usuario