Hinds Instruments PEM-100 Manual de usuario

PEM-100

PHOTOELASTIC MODULATOR

USER MANUAL

Hinds Instruments, Inc.

P/N: 010-0000-021 UM Rev H

THIS DOCUMENT IS PROVIDED “AS IS” WITH NO WARRANTIES

WHATSOEVER, INCLUDING ANY WARRANTY OF MERCHANTABILITY,

FITNESS FOR ANY PARTICULAR PURPOSE, OR ANY WARRANTY OTHERWISE

ARISING OUT OF ANY PROPOSAL, SPECIFICATION OR SAMPLE. All rights

reserved. No part of this publication may be reproduced, stored in a retrieval system,

or transmitted, in any form by any means, electronic, mechanical, by photocopying,

recording, or otherwise, without the prior written permission of Hinds Instruments,

Inc.

Information furnished by Hinds Instruments, Inc. is believed to be accurate and

reliable; however, no responsibility is assumed by Hinds Instruments, Inc. for its use;

nor for any infringements of patents or other rights of third parties which may result

from its use. No license is granted by implication or otherwise under any patent

rights of Hinds Instruments, Inc.

In all respects, the English version of this manual is controlling.

The PEM-100 is covered by the following US patents: (1) 7,800,845, (2) 7,495,205,

(3) 6,970,278, (4) 6,906,844, (5) 6,867,863, (6) 5,886,810, (7) 5,744,721,

(8) 5,652,673.

PEMLabs, Hinds Instruments and the Hinds Instruments, Inc. graphic logo are

trademarks of Hinds Instruments, Inc.

*Third-party brands and names are the property of their respective owners.

CAUTION!

DO NOT turn on your modulator

unless the optical head and the

electronic head are connected by

the head-to-head interconnect

cable.

SERIOUS DAMAGE MAY RESULT!

PEM 100 User Manual v

Table of Contents

Table of Contents..........................................................................................................v

Table of Figures ...........................................................................................................ix

Table of Tables.............................................................................................................xi

Operators’ Safety Summary.........................................................................................1

Terms.....................................................................................................................1

PEM-100 Controller Labels...................................................................................1

AC Power Source..................................................................................................2

Do Not Operate Without Cover.............................................................................2

Unpacking the PEM 100................................................................................................3

Shipping Damage Check......................................................................................3

Unpacking the PEM Optical Head........................................................................4

Special Instructions for I/FS50 Optical Head.......................................................................4

Special Instructions for II/FS42 & II/IS42 Optical Head.......................................................6

1 Introduction..............................................................................................................11

Overview..............................................................................................................11

PEM-100 Controller Accessories .......................................................................12

Rack Mounting Kit .............................................................................................................12

RS232 Converters.............................................................................................................12

2 PEM-100 Controller..................................................................................................13

PEM-100 Controller Front Panel.........................................................................13

PEM-100 Controller Front Panel Buttons..........................................................................14

PEM-100 Controller Rear Panel..........................................................................15

PEM-100 Controller Rear Panel Connections...................................................................15

3 Modulator Head Assembly ......................................................................................17

Optical Head........................................................................................................17

Electronic Head...................................................................................................20

4 Initial Set-Up.............................................................................................................21

Connecting the PEM Optical and Electronic Heads..........................................21

Optical Bench Set-up..........................................................................................25

Functional Check...............................................................................................................25

5 PEM-100 Controller Display.....................................................................................27

Display Modes.....................................................................................................27

Local Control Mode ...........................................................................................................27

Voltage Control Mode........................................................................................................28

Remote Control Mode .......................................................................................................29

User Presets........................................................................................................30

Local Control Presets ........................................................................................................30

Voltage Control Presets.....................................................................................................31

System Configuration.........................................................................................32

Screen Settings .................................................................................................................32

Restore Defaults................................................................................................................32

RS232 Settings..................................................................................................................33

System Info........................................................................................................................33

6 Operating the PEM-100 Controller ..........................................................................35

Front Panel Operation.........................................................................................35

Power Up...........................................................................................................................35

Table Of Contents

vi PEM 100 User Manual

Factory Default Parameters..............................................................................................36

Setting Front Panel Parameters........................................................................................36

Setting Wavelength...........................................................................................................36

Setting Retardation ...........................................................................................................37

Setting the Frequency.......................................................................................................37

Setting VControl................................................................................................................37

Selecting Factory Default Presets.....................................................................................38

Saving User Defined Presets............................................................................................38

Resetting the Controller to Default Parameters................................................................38

Local Control Mode Factory Defaults................................................................................39

Voltage Control Mode Factory Defaults............................................................................39

7 PEM Control Software .............................................................................................41

Installing the PEM Control Software..................................................................41

Setup of PEM-100 Controller for use with PEM Control Software...................41

Launching the PEM Control Software and verifying communication with the PEM-

100 Controller......................................................................................................42

Choosing the Proper Headset Type...................................................................42

Operating the PEM Control Software ................................................................43

Main Display Screen.........................................................................................................44

V Control Operation ..........................................................................................................47

8 Command Line Interpreter (CLI) .............................................................................49

Example Setup of PEM-100 Controller for use with the CLI.............................49

PEM-100 ‘Command Line Interpreter (CLI)’ Command Descriptions...............................51

9 Troubleshooting.......................................................................................................53

Troubleshooting Guide – Symptoms & Possible Remedies............................53

Over Limit Conditions in Local Control & Voltage Control Modes..................55

10 Maintenance...........................................................................................................57

Calibration...........................................................................................................57

Adjustment of Peak Retardation Calibration.....................................................................57

Maintenance........................................................................................................57

Power Line Fuse Replacement.........................................................................................58

Cleaning ..............................................................................................................59

Recommended Optics Cleaning Solutions .......................................................................59

Cleaning the Optics...........................................................................................................60

Cleaning the Controller .....................................................................................................61

A Calibration................................................................................................................63

PEM 100 Calibration ...........................................................................................63

Calibration Theory ..............................................................................................64

Light Sources for Modulator Calibration...........................................................65

Calibration Using an Oscilloscope....................................................................66

Multiple Reflection Techniques .........................................................................69

Static Waveplate Techniques.............................................................................69

Bessel Function Zero Methods..........................................................................70

Bessel Function Ratio Methods.........................................................................71

Parallel Polarizer Calibration at a Single Wavelength......................................72

B Specifications..........................................................................................................77

General- Controller .............................................................................................77

Displayed Parameter Specifications..................................................................77

Input / Output Specifications .............................................................................78

Environmental.....................................................................................................78

Approvals............................................................................................................78

Table Of Contents

PEM 100 User Manual vii

EMC & Safety Standards ....................................................................................78

C Optical Head Specifications....................................................................................79

Advanced Thermal Control (ATC) Option Specifications:................................79

D User Support Information .......................................................................................81

PEM 100 Limited Warranty .................................................................................81

Exclusions..........................................................................................................................81

Overview of the PEM 100 Help System..............................................................82

Return For Repair Procedure.............................................................................83

Packaging..........................................................................................................................83

Items To Include................................................................................................................83

Shipping Arrangements.....................................................................................................83

Return Shipping Address...................................................................................................84

Shipping Costs ..................................................................................................................84

Index ............................................................................................................................85

Table Of Contents

viii PEM 100 User Manual

PEM 100 User Manual ix

Table of Figures

Figure S.1 Compliance Labeling...................................................................................... 1

Figure S.1 I/FS50 Remove Shipping Disk......................................................................... 4

Figure S.2 I/FS50 Remove Blue Foam Disk..................................................................... 5

Figure S.3 I/FS50 Remove Inner Blue Foam & Lens Tissue........................................... 5

Figure S.4 II/FS42 Remove Shipping Disk & Lid ............................................................. 6

Figure S.5 II/FS42 Remove Unpacking Instructions ....................................................... 7

Figure S.6 II/FS42 Remove Blue Foam & Yellow Clips ................................................... 7

Figure S.7 Junction between Optical Element and Transducer..................................... 8

Figure S.8 Removing Yellow Transducer Support Clips................................................ 8

Figure 1.1 PEM 100 Photoelastic Modulator...................................................................11

Figure 2.1 PEM-100 Front Panel OFF State ....................................................................13

Figure 2.2 PEM-100 Rear Panel.......................................................................................15

Figure 2.3 RS232 Connections........................................................................................16

Figure 3.1 Model I/FS50 Optical Head Dimensions........................................................17

Figure 3.2 Model II/FS42 Optical Head Dimensions.......................................................18

Figure 3.3 Model II/ZS50 Optical Head Dimensions.......................................................18

Figure 3.4 II/FS84 Optical Head Dimensions..................................................................19

Figure 3.5 II/ZS37 Optical Head Dimensions..................................................................19

Figure 3.6 Electronic Head Dimensions .........................................................................20

Figure 4.1 Connecting I/FS50 Optical Head to Electronic Head....................................22

Figure 4.2 Connecting II/ZS50 Optical Head to Electronic Head...................................22

Figure 4.3 Connecting II/ZS50 Optical Head to Electronic Head (Cross Connection).23

Figure 4.4 Connecting 1/FS50 Optical Head with ATC Option to Electronic Head......24

Figure 4.5 Block Diagram for Oscilloscope Calibration Method...................................25

Figure 4.6 Oscilloscope Waveform for PEM Set to 0.25 Wave Retardation Between

Crossed Polarizers and PEM 1f Reference Signal ..................................................26

Figure 5.1 Local Control Mode Display............................................................................27

Figure 5.2 Voltage Control Mode Display.......................................................................28

Figure 5.3 Remote Control Mode Display.......................................................................29

Figure 5.4 Local Control Mode – User Presets Menu ....................................................30

Figure 5.5 Voltage Control Mode – User Presets............................................................31

Figure 5.6 System Configuration Menu..........................................................................32

Table of Figures

x PEM-100 User Manual

Figure 6.1 PEM-100 Controller Front Panel....................................................................35

Figure 7.1 Head type selections......................................................................................43

Figure 7.2 Main Display Screen.......................................................................................44

Figure 7.3 Advanced Setting Dialog Box........................................................................46

Figure 7.4 V Control Mode Dialog Box ...........................................................................47

Figure 9.1 Display – No Connection between Head-Set & Controller...........................54

Figure 9.2 Display - Retardation Over Limit Message ...................................................55

Figure 9.3 Display - Voltage Over Limit Message..........................................................55

Figure 10.1 Opening the Power Fuse Holder .................................................................58

Figure 10.2 Fuses Properly Inserted In Fuse Holder.....................................................59

Figure 10.3 Direction of cotton swab wiping motion.....................................................60

Figure 10.4 Junction between Optical Element and Transducer..................................61

Figure A.1 Typical Optical Setup ....................................................................................64

Figure A.2 Oscilloscope Calibration Method .................................................................66

Figure A.3 Waveform for Half-wave Retardation............................................................67

Figure A.4 Retardation 90% of Half-wave.......................................................................67

Figure A.5 Retardation 110% of Half-wave.....................................................................68

Figure A.6 Waveform for a Retardation of Four Half-waves..........................................68

Figure A.7 Setup for Double Pass Modulation...............................................................69

Figure A.8 Determining the Controller Settings for which J0= 0 .................................70

Figure A.9 Ratio V2f/VDC vs retardation, radians............................................................73

Figure A.10 Ratio V2f/VDC vs. retardation (radians) for parallel polarizers...................74

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