THORLABS SLS401 Manuale utente
SLS401 & SLS402
Benchtop Arc Lamp
User Guide
Benchtop Arc Lamp
Table of Contents
Chapter 1Warning Symbol Definitions..............................................................................................1
Chapter 2Safety....................................................................................................................................2
Chapter 3Product Overview................................................................................................................3
3.1.Planck's Law and Black Body Radiation.......................................................................3
3.2.Xenon and Mercury Xenon Arc Lamp ...........................................................................4
3.3.Optical Configuration......................................................................................................4
Chapter 4Getting Started.....................................................................................................................7
4.1.Part List ............................................................................................................................7
4.2.Unpacking ........................................................................................................................7
4.3.Operation Elements ........................................................................................................8
4.3.1.Lamp Housing Front and Back Panels .................................................................................8
4.3.2.Controller Front Panel ...........................................................................................................8
4.3.3.Controller Back Panel ...........................................................................................................9
4.4.Bulb Handling ..................................................................................................................9
4.5.Bulb Installation ............................................................................................................10
4.6.Setting Up on a Work Surface......................................................................................13
Chapter 5Operation.............................................................................................................................16
5.1.Starting the Lamp..........................................................................................................16
5.2.Shutter Operation..........................................................................................................16
5.3.Adjusting Collimation ...................................................................................................16
5.4.Adjusting the Rear Concave Mirror .............................................................................17
5.5.Application Ideas...........................................................................................................18
5.6.Troubleshooting ............................................................................................................19
5.6.1.Overheating.........................................................................................................................19
5.6.2.Lamp Not Connected ...........................................................................................................19
5.6.3.Bulb State Warning .............................................................................................................19
Chapter 6Bulb Replacement..............................................................................................................20
Chapter 7Specifications.....................................................................................................................21
Chapter 8Mechanical Drawing...........................................................................................................22
Chapter 9Certifications and Compliances.......................................................................................23
Chapter 10Regulatory...........................................................................................................................24
Chapter 11Thorlabs Worldwide Contacts..........................................................................................25
Benchtop Arc Lamp Chapter 1: Warning Symbol Definitions
Rev C, September 28, 2018 Page 1
Chapter 1 Warning Symbol Definitions
Below is a list of warning symbols you may encounter in this manual or on your device.
Symbol Description
Direct Current
Alternating Current
Both Direct and Alternating Current
Earth Ground Terminal
Protective Conductor Terminal
Frame or Chassis Terminal
Equipotentiality
On (Supply)
Off (Supply)
In Position of a Bi-Stable Push Control
Out Position of a Bi-Stable Push Control
Caution: Risk of Electric Shock
Caution: Hot Surface
Caution: Risk of Danger
Warning: Laser Radiation
Caution: Spinning Blades May Cause Harm
Benchtop Arc Lamp Chapter 2: Safety
Page 2 CTN002644-D02
Chapter 2 Safety
The lamp comes with a switching power supply compatible with voltages from 100 to 240 VAC. There is no need
to change the fuse when selecting your regional voltage.
SHOCK WARNING
High voltage inside. To avoid electrical shock, before powering unit, make sure that the protective
conductor of the 3-conductor power cord is correctly connected to the protective earth contact of the
socket outlet. Improper grounding can cause electric shock resulting in severe injury or even death.
Do not operate without cover installed.
WARNING
This unit must not be operated in explosive environments.
WARNING
Do not operate in wet/damp conditions.
WARNING
Do NOT look directly at the light source beam during operation. Do NOT place hand or body part in
the light beam as this may cause burning.
CAUTION: HOT SURFACE
The housing of the lamp housing can get very hot during operation.
Extensive contact may cause burning.
WARNING: HOT SURFACE
The temperature of the bulb will exceed 200˚C during operation. Always wait for at least 30 minutes
for the bulb to cool down before performing a bulb replacement. Always wear gloves
when handling bulbs.
Benchtop Arc Lamp Chapter 3: Product Overview
Rev C, September 28, 2018 Page 3
Chapter 3 Product Overview
3.1. Planck's Law and Black Body Radiation
A black body is an object that absorbs all incident electromagnetic radiation (e.g., light): no light passes through or
is reflected. However, despite the name, a black body will also emit electromagnetic radiation. The radiation of a
black body in thermal equilibrium is described by Planck’s Law:
, 2
1
1
Where
I
is the radiated power per unit area of emitting surface per unit wavelength at temperature
T
;
K
is the
Boltzmann constant,
h
is the Planck constant,
c
is the speed of light.
By measuring the spectrum of the black body radiation, we can calculate the temperature of this black body. Figure
1 shows the radiated power per unit area I as a function of wavelength at various temperatures.
Figure 1 Blackbody Radiation at Different Temperatures
In real life, broadband light sources may vary widely from the ideal black body in terms of the frequency and intensity
of the light emitted. By comparing the light source to an ideal black body at a given temperature, one can
characterize the light source by the temperature of the black body radiator which has the same chromaticity, which
is known as the color temperature of the light source.
Benchtop Arc Lamp Chapter 3: Product Overview
Page 4 CTN002644-D02
3.2. Xenon and Mercury Xenon Arc Lamp
An arc lamp is a light source that generates light from gas discharge. The construction of a double ended arc lamp
bulb is shown in Figure 2. The bulb consists of two metal electrodes sealed in a quartz envelope that is filled with
inert gas.
Figure 2 Structure of a Double-Ended Arc Lamp Bulb
During ignition, high-voltage pulses are sent through the electrodes to ionize the gas in between, causing arc
discharge to occur. After the arc discharge has been initiated, only a low voltage is required to maintain it. During
arc discharge, pinpoint-sized cloud of plasma in the arc will generate light with very high brightness.
Thorlabs offers both Xenon and Mercury-Xenon Arc Lamps. Both bulbs are filled with Xenon gas, while the Mercury-
Xenon bulb has traces of mercury mixed in. The Xenon arc lamp provides a continuous emission over the 240 nm
to 2400 nm spectral region with some intense lines between 800 nm and 1000 nm. A Mercury-Xenon arc lamp
provides higher peaks at the blue and UV end of the spectrum due to the characteristic spectral lines of Mercury.
The SLS401 Xenon arc lamp has a nominal color temperature of 5800 K and the SLS402 Mercury-Xenon arc lamp
has a nominal color temperature of 6000 K. Figure 3 provides the typical spectra of Xenon and Mercury-Xenon
lamps.
Figure 3 Spectra of Xenon (left) and Mercury-Xenon (right) Lamps
3.3. Optical Configuration
The SLS401 is a Xenon Arc lamp with a 150 W Xenon bulb. SLS402 is a Mercury Xenon Arc lamp with a 150 W
Mercury-Xenon bulb. The bulb is placed inside the lamp housing at the back focal point of the collimating lens, with
Quartz Envelope
Anode
Cathode
Benchtop Arc Lamp Chapter 3: Product Overview
Rev C, September 28, 2018 Page 5
the long axis of the arc aligned vertically and parallel to the plano surface of the lens, to produce a collimated output
beam.
There is a silver-coated concave mirror at the rear of the lamp housing, with its center of curvature aligned with
center of the arc lamp bulb, as shown in Figure 4. This configuration focuses the light from arc back back to the arc
position so that it can be be collimated by the front lens.
Figure 4 gives an outline of the optical configuration of the Arc lamp.
Figure 4 Basic Optical Configuration of SLS401 and SLS402 Lamps
Here are the dimensions of the bulbs.
Bulb Specifications
Dimensions
A 125 mm
B 150 mm
C 58 mm
Arc Gap 1.9 mm
Figure 5 Xenon and Mercury-Xenon Bulb Dimensions
Bulb Lens
Back Focal Length
Rear Mirror
Radius of Curvature
A
B
+
-
C
Benchtop Arc Lamp Chapter 3: Product Overview
Page 6 CTN002644-D02
The collimating lens is a plano-convex aspherical lens, with the plano surface facing the arc. The main specifications
of the collimating lens are listed below.
Lens Specifications
Parameter Symbol Value
Clear Aperture CA 35 mm
Diameter Dia 38 mm
Focal Length f 79.16 mm
Back Focal Length fb73.68 mm
Center Thickness tc8 mm
Edge Thickness te2.87 mm
Material UV-Grade Fused Silica
Design Wavelength 587.6 nm
Figure 6 Collimating Lens Specifications
The silver-concave mirror is oriented with the coated, concave surface facing the arc. The main specifications of
the collimating lens are listed below.
Mirror Specifications
Parameter Symbol Value
Diameter Dia 50.8 mm
Focal Length f 38.1 mm
Radius of Curvature ROC 76.2 mm
Center Thickness tc9 mm
Edge Thickness te13.3 mm
Material N-BK7
Coating Protected Silver
Figure 7 Rear Mirror Specifications
H"
Dia
t
e
t
c
f
b
f
f
f
R
f
t
Diameter
e
ROC
tc
Benchtop Arc Lamp Chapter 4: Getting Started
Rev C, September 28, 2018 Page 7
Chapter 4 Getting Started
4.1. Part List
The package contains the following items:
1 Lamp Housing
1 Controller Unit
1 Bulb
1 Operation Manual
1 Cable for Connecting Lamp Housing and Controller
1 Power Cord
1 4 mm Hex Key
1 1.3 mm Hex Key
4.2. Unpacking
The packaging of the SLS401 and SLS402 is illustrated below.
Figure 8 Packaging of the SLS401 and SLS402 Lamps
There are 6 major pieces of foam inserts in the packaging of an SLS401 or SLS402 as shown in Figure 8. Remove
them carefully and take out the lamp and controller.
Controlle
r
Lam
p
House
Lam
p
Control Cable
Power Cord
Benchtop Arc Lamp Chapter 4: Getting Started
Page 8 CTN002644-D02
4.3. Operation Elements
4.3.1. Lamp Housing Front and Back Panels
Figure 9 Front and Back Panel of SLS401 or SLS402 Lamp Housing
L1. Shutter Control Knob
L2. Collimating Lens
L3. 4-40 Threaded Hole for 60 mm Cage Systems
L4. Adjustable Feet
L5. Knobs for Adjusting Rear Concave Mirror Alignment
4.3.2. Controller Front Panel
Figure 10 Front Panel of Arc Lamp Controller
C1. Power Switch
C2. Lifetime Reset Button
C3. Bulb Status Indicator LED
C4. Temperature Warning LED
C5. LCD Screen
C4
C3
C1
L5
L3
L1
L2
L4
C2 C5
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