MKS Ophir Ariel User manual

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www.ophiropt.com
Rev5, 01/04/21
Instruction Manual
Ariel User Manual

The Ariel User Manual
Rev 5, 01/04/21
Copyright © 2020 by MKS Instruments, Inc.
All rights reserved. No part of this work may be reproduced or transmitted in any form or by any means,
electronic or mechanical, including photocopying and recording, or by any information storage or
retrieval system, except as may be expressly permitted in writing by MKS Instruments, Inc.
mksinst™ is a trademark of MKS Instruments, Inc.
Ophir® is a registered trademark.

The Ariel User Manual
Rev 5, 01/04/21
Chapter 1: Table of Contents
Chapter 2: List of Figures and Tables...........................................................................................................2
Chapter 3: Safety Information ......................................................................................................................3
Safety Procedures and Precautions..................................................................................................3
Symbols Used in This Instruction Manual.......................................................................................3
Chapter 1: Overview.....................................................................................................................................4
Chapter 2: Specifications..............................................................................................................................5
Chapter 3: Accessories and Features ............................................................................................................8
Chapter 4: Wavelength options.....................................................................................................................9
Chapter 5: Pulsed Power.............................................................................................................................10
5.1: Physical Principle ...................................................................................................................10
5.2: Limitations..............................................................................................................................10
5.3: Display....................................................................................................................................10
5.4: Errors ......................................................................................................................................10
Chapter 6: Using the Ariel..........................................................................................................................11
6.1: Power on.................................................................................................................................11
6.2: Power off ................................................................................................................................11
6.3:Charging .................................................................................................................................11
6.4: Display and navigation ...........................................................................................................11
6.5: CW or Pulsed Power...............................................................................................................11
6.6: Logging...................................................................................................................................11
6.7: Ranges.....................................................................................................................................12
6.8: Temperature............................................................................................................................12
6.9: Ingress protection....................................................................................................................12
6.10: Menu.....................................................................................................................................12
6.10.1: Log........................................................................................................................12
6.10.2: Diff/λ.....................................................................................................................13
6.10.3: Settings .................................................................................................................13
6.10.4: Zero.......................................................................................................................13
Chapter 7: Applications ..............................................................................................................................14
7.1: StarLab....................................................................................................................................14
7.2: StarViewer..............................................................................................................................14

The Ariel User Manual
Rev 5, 01/04/21
Chapter 2: List of Figures and Tables
Figures
Figure 1: The Ariel isometric view...............................................................................................................4
Figure 2: The Ariel drawing .........................................................................................................................7
Figure 3: Protective cover.............................................................................................................................8
Figure 4: Ariel parts......................................................................................................................................8
Figure 5: Window.........................................................................................................................................9
Figure 6: Diffuser..........................................................................................................................................9
Figure 7: Empty top......................................................................................................................................9
Figure 8: Diff/λ screen ..................................................................................................................................9
Figure 9: Pulse screen.................................................................................................................................10
Figure 10: The Ariel front view..................................................................................................................11
Figure 11: Measurement screen controls....................................................................................................11
Figure 12: Status line..................................................................................................................................11
Figure 13: Pulse measurement screen.........................................................................................................11
Figure 14: CW measurement screen...........................................................................................................11
Figure 15: Log detailed view......................................................................................................................13
Figure 16: List logs.....................................................................................................................................13
Figure 17: Settings sub-menu .....................................................................................................................13
Tables
Table 1: The Ariel specifications..................................................................................................................6
Table 2: Wavelengths options.......................................................................................................................9
Table 3: Pulsewidth errors..........................................................................................................................10

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Chapter 3: Safety Information
Safety Procedures and Precautions
The following general safety precautions must be observed during all phases of operation of this
instrument. Failure to comply with these precautions or with specific warnings elsewhere in this
manual violates safety standards of intended use of the instrument and may impair the protection
provided by the equipment. MKS Instruments, Inc. assumes no liability for the customer’s failure
to comply with these requirements.
DO NOT SUBSTITUTE PARTS OR MODIFY INSTRUMENT
Do not install substitute parts or perform any unauthorized modification to the instrument. Return the
instrument to an MKS Calibration and Service Center for service and repair to ensure that all safety
features are maintained.
SERVICE BY QUALIFIED PERSONNEL ONLY
Operating personnel must not remove instrument covers. Component replacement and internal
adjustments must be made by qualified service personnel only.
Symbols Used in This Instruction Manual
Definitions of WARNING, CAUTION, and NOTE messages used throughout the manual.
Warning
The WARNING sign denotes a hazard. It calls attention to a
procedure, practice, condition, or the like, which, if not
correctly performed or adhered to, could result in injury to
personnel.
Caution
The CAUTION sign denotes a hazard. It calls attention to an
operating procedure, practice, or the like, which, if not
correctly performed or adhered to, could result in damage to
or destruction of all or part of the product.
Note
The NOTE sign denotes important information. It calls
attention to a procedure, practice, condition, or the like,
which is essential to highlight.

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Chapter 1: Overview
Features
•Measures up to 8000W
•No Water Cooling
•Self-Contained, built in Display, Battery, Bluetooth, USB
•Very Compact
•Dust proof, splash proof
•Supported by PC and Android applications
The Ariel measures high power industrial lasers of up to 8kW by measuring the energy of a short
exposure to this power. The laser is set to deliver a pulse of from 0.05 to several seconds. The Ariel then
measures the energy and duration of the laser pulse and calculates the power. The Ariel is designed to
work without water cooling.
The Ariel is versatile and durable with a dust sealed enclosure and detachable antireflection coated
protective window. It also comes with a detachable diffuser for measuring very high power density
beams.
The Ariel is compact, wireless, and self-contained with its own display and battery, making it ideal for
usage in tight spaces such as an additive manufacturing chambers as well as for production process
quality control and R&D.
Figure 1: The Ariel isometric view

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Chapter 2: Specifications
Version: 3 (12/26/2020)
Note
See our website www.ophiropt.com for latest
specifications.
Model
Use
Ariel
High power laser measurement by short exposure
Absorber Type
LP2, absorption >95%
Power Range
200mW –8,000W
Exposure Time (see table
below)
Pulsed Mode: 0.05 –2s. (a) CW mode: 10s to continuous depending on
power level
Wavelength
Window: 440-550nm, 900 –1100nm (b)
Diffuser:440-550nm, 940-1100nm (b)
Without window or diffuser: 2.94µm (c), 10.6µm (c)
Aperture
Ø32mm. Maximum beam diameter for Gaussian beam 21mm.
With diffuser Maximum beam diameter for Gaussian beam 10mm.
Calibration Uncertainty
±1.9%
Power Accuracy
±3% (900-1100nm, 2.94µm, 10.6µm), ±3.5% (440-550nm) (a) (b)
Minimum Power for Pulse
Width Measurement
440 –800nm, >20W; 800 –1100nm, >10W; >1100nm, not available (c)
Maximum Beam Incidence
Angle
Without diffuser: ±30 degrees for <12mm Gaussian beam,
With diffuser: ±25 degrees for <10mm Gaussian beam (d)
Reproducibility
±1%
Power Range vs.
Irradiation Time
200mW –30W: CW, 500W: up to 20s; 1,000W –8,000W: 0.05 –1s.
Linearity
±1.5%
Time to Reading
3s after end of exposure
Waiting Time for Next
Measurement
12s
Maximum Energy for
Single Pulse
2.4kJ
Maximum Exposure
Before Cooling Down is
Necessary
Maximum operating temperature of 60ºC will be reached after exposure to
14kJ (e.g. 10 shots at 2,000W, 0.7s). Cooling down time before another 14kJ
series of shots is ~10 minutes (e).
Over Temperature
Warning
Flashing display
Cooling
Convection (e)
Battery
Rechargeable, 1100mAh, lifetime >15 hours
Interface
128x64 pixel LCD Display, Bluetooth 5.1 (compatible with Bluetooth 4 and
above), USB-C
Dimensions (L x W x H)
70 x 70 x 79 mm (see drawing)
Weight
0.8kg
Operating Temperature
10-60ºC
Ingress Protection
IP62

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Compatible Client
Applications
StarLab (PC, USB), StarViewer (Android, Bluetooth)
Recommended Exposure
Times and 1/e² Gaussian
Beam Diameters
Laser Power W
Recommended
Exposure s
Min 1/e² beam dia.
mm
Min 1/e² beam dia.
with diffuser (max
dia. is 10mm) mm
Continuous Power
Measurement
30
Continuous (e)
1
0.3
500
20 (e)
4
2
Power Measurement from
Short Exposure
500
2
4
2
1000
1
5
1
2000
0.7
10
1.5
4000
0.5
16
3.5
8000
0.3
22
N.A.
Compliance
CE, UKCA, China RoHS
Version
Part number
7Z02798
Notes: (a) The power is calculated by measuring the pulse energy and exposure time. A rectangular pulse
is assumed for this calculation.
(b) May be used at 550-900nm with decreased accuracy and higher reflection (up to 10%).
(c) Use without window or diffuser. The sensor does not measure pulse width above 1100nm. For
pulsed power measurement at >1100nm, a short pulse with known duration should be applied.
A pulse energy measurement is performed and divided by the known pulse width to obtain the
power. When working without window and without diffuser, the sensor is not sealed against
dust or water.
(d) With diffuser, reading will be up to 10% lower than vertical beam and beam should be offset
from center in opposite direction to beam incidence by ~10mm.
(e) Faster cooling can be achieved by attaching the Ariel to a heat sink using the mounting
threads at the bottom.
Table 1: The Ariel specifications

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Figure 2: The Ariel drawing

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Chapter 3: Accessories and Features
The Ariel has several accessories and features:
•Window –used for regular measurements.
•Diffuser –used for higher power-density beams, refer to specifications for details.
•Protective Cover with target –used to protect the diffuser and window
from scratches, and for laser aiming. Should be used with pointers only,
and removed before switching on the laser.
•USB-C cable –used for charging and as a data cable for StarLab.
•Wall charger
•Case –has a separate sleeve for the window/diffuser while not in use
•USB rubber plug –used in order to protect the USB socket from dust.
The device itself is protected even if the rubber plug is detached. The rubber plug may be removed
permanently using a simple screwdriver without any harm to the dust and splash proof protection.
•Heatsink screw holes –there are screws on the bottom side of the Ariel that allow mounting on a
heatsink.
Figure 4: Ariel parts
Figure 3: Protective cover

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Chapter 4: Wavelength options
The Ariel supports four different operation modes:
Wavelength
Aperture
Accessory
Illustration
Window
500 –1100nm
Ø32mm
Window must be mounted
Figure 5: Window
Diffuser
500 –1100nm,
high power
density
Ø10mm
Diffuser must be mounted
Figure 6: Diffuser
2.94µm
2.94µm
Ø32mm
The top cover should be left open.
Figure 7: Empty
top
10.6µm
10.6µm
Ø32mm
The top cover should be left open.
Table 2: Wavelengths options
Make sure to screw the window/diffuser tightly, in order to preserve the sealing.
●Click menu ( )
●Select “Diff/λ”
●Select the proper setting
Note
At 2.94µm and 10.6µm, the photodiode will not be able to
measure the pulse width, and the device will not be
protected against dust or water while there is no window or
diffuser mounted properly.
Figure 8: Diff/λ screen

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Chapter 5: Pulsed Power
5.1: Physical Principle
The core of the Ariel is a high power copper thermopile disk that can measure short exposures of high
power lasers.
An internal, un-calibrated silicon photodiode detects the backscattered light to measure the exposure time.
Average power is then calculated by, 𝑃 = 𝐸
∆𝑡 , where Pis power, Eis energy, and Δt is the time interval.
5.2: Limitations
The photodiode's sensitivity depends on wavelength, meaning that the minimum power that may be
detected by it also depends on the wavelength. The photodiode is not sensitive beyond 1100nm. Please
check the specifications for details.
2.94µm and 10.6µm lasers are not supported by the photodiode.
5.3: Display
The calculated power will be displayed in large digits. The energy will be
displayed in small digits on the left side, and the pulse width will be displayed
in small digits on the right side of the screen.
On the pulsed power screen, a blinking 'RDY' message (meaning “READY”)
will appear on the top right corner to indicate that the Ariel is ready to
measure a pulse.
5.4: Errors
Situation
Device displays
Log note
No trigger detected
0
No trigger!
Pulse is too long
OVER
Pulse too long!
Pulse is too short
UNDER
Pulse too short!
Table 3: Pulsewidth errors
In a situation where the pulse width is not detected but the energy is measured, the device will display the
energy but not the calculated peak power. The peak power can be calculated manually if the pulse width
is known, using the equation above.
Figure 9: Pulse screen

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Chapter 6: Using the Ariel
6.1: Power on
In order to power on the Ariel just click the left button (which has a small on/off
icon), or attach a powered USB-C cable. The Ophir logo will appear, followed by
the date and time, and then the measurement screen.
6.2: Power off
In order to power the Ariel off, hold the left button for a few seconds, until a
‘powering off’display appears.
6.3: Charging
Connect the USB-C cable to the supplied wall charger or to a computer. During charging, the battery icon
will be animated: the constant bars represent the current battery level. When the battery is fully charged,
the battery icon will have four constant bars.
Caution
It is recommended to charge the Ariel by connecting the
USB cable to a PC with a standard USB 2.0 or USB 3.x
socket capable of providing at least 500mA. Alternatively,
connect to the provided Ophir wall charger. Using a wall
charger or any type of USB socket that cannot provide
minimum 500mA will prevent the Ariel from charging
properly, and may cause damage to the charger.
6.4: Display and navigation
The display has a status line on the top. This line shows the body temperature,
a Bluetooth icon (if enabled; this icon will have dots from both sides if
connected to a device), wavelength setting, battery level and time.
On the bottom line the dynamic functions for each button are displayed.
6.5: CW or Pulsed Power
Use the right most button to toggle between CW
measurement and Pulsed Power measurement. The
current measurement mode name/icon will be
displayed on top of the button.
6.6: Logging
The Ariel logs measurements automatically. In CW
power mode it logs once each second, and in Pulsed
Power mode it logs every pulse. The Ariel has space for 32768 entries. When the log reaches maximum,
the oldest measurements will be overwritten. You can check the memory status in the information screen,
and clear the entire log in the log menu.
Figure 10: The Ariel
front view
Figure 12: Status line
Figure 11: Measurement
screen controls
Figure 14: CW
measurement screen
Figure 13: Pulse
measurement screen

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Note
If the Ariel stays long enough on CW measurement screen,
the entire log will be overwritten.
6.7: Ranges
Use the middle button to toggle between ranges, in order to choose the most compatible measurement
range. The current range will be displayed on top of the middle button.
6.8: Temperature
Please see the specifications for details about the temperature limitations. When either the disk or the
sensor body exceeds its respective temperature limit, the screen will blink and display the text "TOO
HOT!". In this case, immediately turn off the laser, and let the Ariel cool down. Take into account, that
unless it cools down completely to room temperature, the number of additional measurements will be
limited and depends on the sensor’s body temperature.
Mounting the Ariel on a heatsink, using the bottom screw holes is strongly recommended in order to
improve temperature performance (to extend duration before cool down is needed and to shorten cool
down duration).
Warning
Overheating the Ariel or using power-density higher than
stated in the specifications may cause damage to the Ariel,
and can be dangerous.
6.9: Ingress protection
The device is provided with ingress protection –sealing against dust and splashes. Refer to the
specifications for details. The gaskets are intended for single use –any disassembly of the main screws
may damage the sealing. The window or diffuser are replaceable, but should be tightened up in order to
maintain sealing.
In order to avoid scratches, it is not recommended to wash the window and diffuser with water. The
suggested cleaning method is using pressured air and a special lens-cleaning preparation/cloth.
6.10: Menu
Click the left button ( ) to open the menu. Use the middle button to toggle to the desired item, and the
right button to select it. The left button will close the current menu and return up one level. While the
menu is open, the measurements are stopped.
6.10.1: Log
Use this submenu to clear the log memory, or to list the logged measurements.

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List Log
In this view the log entry numbers will be displayed
on the top line, and the log entries will be listed
showing the following details: time of the
measurement, value, type (pulse/CW) and an
exclamation mark (!) in case of an error.
Use the right button in order to show a detailed view of the first measurement. In the detailed view, you
can scroll up and down the measurements.
6.10.2: Diff/λ
Select the correct wavelength setting. Refer to the chapter Wavelength options for details.
6.10.3: Settings
Backlight
Toggles the backlight on/off.
Contrast
Shows the contrast adjustment screen.
Time/Date
Shows the time/date adjustment screen.
Bluetooth
This submenu allows several actions:
•Disconnect –available only if there is a device connected to the Ariel via Bluetooth.
•Disable/Enable –disables (or enables) the Bluetooth connection.
•Clear All –clears the Bluetooth cache. Use this option only if you encounter pairing difficulties.
Temperature units
Toggles the units used to display temperature on the screen between Fahrenheit and Centigrade
Information
Displays an information screen. In this screen will be listed data such as: date and time, name and S/N,
F/W version, Bluetooth name, device body temperature, disk temperature, log size, last and next
calibration dates.
6.10.4: Zero
Opens the zeroing screen. Use the zeroing option in order to make the measurement more accurate in CW
mode. The zeroing process should be performed while the sensor is protected from light and when the
sensor is cool. The protection cover can be left on for this purpose. Zeroing is recommended once a day
or before each CW measurement session. It is not required for Pulsed Power measurements.
Figure 16: List logs
Figure 15: Log
detailed view
Figure 17: Settings
sub-menu

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Chapter 7: Applications
7.1: StarLab
Ophir’s StarLab software may be used to communicate with the Ariel using the USB-C cable connected
to a PC. See more details in the StarLab User Manual.
7.2: StarViewer
The StarViewer app may be used on an Android device in order to communicate with the Ariel using
Bluetooth wireless communication.
Note
See our website for more details of both of these
applications
Ariel User Manual
04 Jan 2021
Rev 5
For the latest version, please visit our website: www.ophiropt.com/laser-measurement