THORLABS EDU-SPEB1 User manual

EDU-SPEB1
EDU-SPEB1/M
Advanced Spectrometer Kit
User Guide

Advanced Spectrometer Kit
Page 1 MTN002263-D02 Rev C, August 26, 2015
Table of Contents
Chapter 1Warning Symbol Definitions ........................................... 2
Chapter 2Safety ................................................................................ 3
Chapter 3Introduction ...................................................................... 4
Chapter 4Setup ................................................................................. 5
4.1.ComponentsandPartsList.............................................5
4.2.ComponentAssembly....................................................8
4.2.1.LED Wiring ................................................................................ 10
4.3.SetupandAdjustment..................................................10
4.3.1.Light Source Setup.................................................................... 10
4.3.2.Prism Spectrometer Setup ........................................................ 11
4.3.3.Grating Spectrometer Setup ..................................................... 13
Chapter 5Spectrometer Theory ..................................................... 15
5.1.Introduction.................................................................15
5.2.WaveInterferencewithDoubleSlitsandGratings.......15
5.2.1.Double slit ................................................................................. 15
5.2.2.Grating Interference .................................................................. 17
5.3.DispersingPrisms.........................................................18
Chapter 6Teaching Tips and Experiments................................... 21
6.1.Exercise1:WavelengthMeasurementofThreeLinesin
theMercurySpectrum.................................................21
6.2.Exercise2:MeasuringtheIndexofRefractionofthe
PrismUsingaKnownSpectralLine...............................23
Chapter 7Regulatory ...................................................................... 25
7.1.WasteTreatmentisYourOwnResponsibility...............25
7.2.EcologicalBackground.................................................25
Chapter 8Thorlabs Worldwide Contacts ...................................... 26

EDU-SPEB1 & EDU-SPEB1/M Chapter 1: Warning Symbol Definitions
Page 2
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

Advanced Spectrometer Kit
Page 3 MTN002263-D02 Rev C, August 26, 2015
Chapter 2 Safety
CAUTION
Optical gratings can be easily damaged by moisture, fingerprints, aerosols, or the
slightest contact with any abrasive material. Gratings should only be handled when
necessary and always held by the sides. Latex gloves or a similar protective covering
should be worn to prevent oil from fingers from reaching the grating surface. No
attempt should be made to clean a grating other than blowing off dust with clean, dry
air or nitrogen. Solvents will likely damage the grating's surface. Scratches or other
minor cosmetic imperfections on the surface of a grating do not usually affect
performance and are not considered defects.
!
!

EDU-SPEB1 & EDU-SPEB1/M Chapter 3: Introduction
Page 4
Chapter 3 Introduction
Optical spectroscopy has made a major contribution to the development of today's
concept of atomic and molecular structure and is indispensable as an analysis procedure
in research and industry. Astronomers can analyze the composition of distant stars and
environmental analysts can optically measure the composition of exhaust gases without
having to take samples. Each of these application areas has different requirements with
regard to the spectrometer to be used.
This kit includes parts to build two types of spectrometers, and can be easily set up by
students. These spectrometers can achieve very fine resolutions, allowing very close
spectral lines to be resolved, such as the sodium-D lines (spectral distance of 0.6 nm).
As the setup is very small, LEDs can also be analyzed, although so-called "superbright"
LEDs, which have a higher intensity than normal LEDs, are recommended. The included
LED bracket makes it very easy to install the LEDs in the setup. Other light sources,
such as incandescent lamps, energy-saving lamps (compact fluorescent tubes), mercury
vapor lamps, and lasers can also be analyzed by the spectrometer
The experiment package contains the following wavelength-dispersive elements:
A reflective grating with 600 lines/mm.
A reflective grating with 1200 lines/mm.
An equilateral dispersing prism.
Additional gratings and prisms are available, which can be purchased separately from
Thorlabs. Contact [email protected] for more information.
The supplied gratings are called blazed gratings, which means that the reflective layer is
arranged diagonally. The great advantage of this is that the highest intensity is not in the
zeroth diffraction order, which is directly in the incoming beam path and thus not of
interest, but rather in a higher order, to the side of the incident beam. In the case of the
gratings used in this kit, the first order is the most intense. However, you can also easily
observe higher orders with the setup (up to 5 with the grating 600 lines/mm). In addition,
blazed gratings function in the same way as normal gratings, so all of the standard
grating calculations and equations apply. Thus, for teaching purposes, the difference
need not be addressed, as there is no difference in the equations that are relevant for the
classroom.

Advanced Spectrometer Kit
Page 5 MTN002263-D02 Rev C, August 26, 2015
Chapter 4 Setup
4.1. Components and Parts List
In cases where the metric and imperial kits contain parts with different item numbers,
metric part numbers and measurements are indicated by parentheses unless otherwise
noted.
1 x LEDMF
LED Mount
1 x LEDWE-15
Epoxy Encased White
LED, Package of 5 2 x ACL2520U
Ø1" Aspheric Condenser
Lens, f = 20 mm
2 x FMP1(/M)
Ø1" Setscrew Lens Mount
1 x LB1471
Ø1" Focusing Lens,
f = 50 mm
2 x LMR1(/M)
Ø1" Threaded Lens Mount
1 x VA100(/M)
Adjustable Slit
1 x LB1676
Ø1" Imaging Lens,
f = 100 mm
1 x GR25-1205
1200 lines/mm Reflective
Grating

EDU-SPEB1 & EDU-SPEB1/M Chapter 4: Setup
Page 6
1 x GR25-0605
600 lines/mm Reflective
Grating
2 x CH1A
Grating Mount
1 x PS858
Equilateral Dispersing
Prism
1 x KM100PM(/M)
Kinematic Prism Mount
1 x PM3(/M)
Clamping Arm for Prism
Mount 1 x EDU-VS1(/M)
Viewing Screen
1 x MB1824 (MB4560/M)
Optical Breadboard,
18" x 24" (45 cm x 60 cm)
1 x RDF1
4 Breadboard Feet 9 x TR3 (TR75/M)
Ø1/2″(Ø12.7 mm) Optical
Post, 3" (75 mm) Long
9 x PH3 (PH75/M)
Ø1/2" (Ø12.7 mm) Post
Holder, 3" (75 mm) Long
1 x TR2 (TR50/M)
Ø1/2" (Ø12.7 mm) Optical
Post, 2" (50 mm) Long
1 x PH2 (PH50/M)
Ø1/2" (Ø12.7 mm) Post
Holder, 2" (50 mm) Long

Advanced Spectrometer Kit
Page 7 MTN002263-D02 Rev C, August 26, 2015
6 x BA1(/M)
Post Holder Base,
1" x 3" x 3/8" (25 mm x
75 mm x 10 mm)
4 x BA2(/M)
Post Holder Base,
2" x 3" x 3/8" (50 mm
x 75 mm x 10 mm)
1x TPS5
Laser Safety Screen,
12" x 12"
(305 mm x 305 mm)
Imperial Kit Hex Keys, Ball Driver, and Screws
Imperial Kit Hex Keys: 3/32", 0.050",
5/64", and 1/8" 1 x BD-3/16L
Balldriver for 1/4"-20 Screws
Imperial Screws:
10 x 1/4"-20 Cap Screw, 1/2" Long
12 x 1/4"-20 Cap Screw, 5/8" Long
4 x 1/4"-20 Cap Screw, 3/4" Long
12 x M6 Washers
4 x #1/4 Nuts
1 x 8-32 Cap Screw, 1/4" Long
Metric Kit Hex Keys, Ball Driver, and Screws
Metric Hex Keys: 1.3 mm, 2 mm,
and 3 mm 1 x BD-5ML
Balldriver for M6 Screws
Metric Screws:
10 x M6 Cap Screw, 12 mm long
12 x M6 Cap Screw, 16 mm Long
4 x M6 Cap Screw, 20 mm Long
12 x M6 Washers
4 x M6 Nuts
1 x M4 Cap Screw, 6 mm Long

EDU-SPEB1 & EDU-SPEB1/M Chapter 4: Setup
Page 8
4.2. Component Assembly
First, mount all of the lenses in the LMR1(/M) and FMP1(/M) mounts as specified below
and screw each mount to a Ø12.7 mm post. Next, place each post into a PH3 (PH75/M)
post holder and attach a BA1(/M) post holder base.
1. LB1676 and LB1471 lenses in LMR1(/M) mounts (Figure 1a).
2. ACL2520U condenser lenses in FMP1(/M) mounts (Figure 1b).
3. Attach each mount to a TR3 (TR75/M) post, place into a PH3 (PH75/M) post
holder, and attach a BA1(/M) base using a 1/2" long 1/4"-20 (12 mm long M6)
cap screw.
Figure 1 : Ø1” Lenses in LMR1(/M) (a) and FMP1(/M) (b) Mounts, on Ø1/2” Posts
Next, mount the VA100(/M) slit and LEDMF led mount to posts in a similar fashion:
1. VA100(/M) adjustable slit on TR3 (TR75/M) post (Figure 2a)
2. LEDMF LED bracket on TR3 (TR75/M) post (Figure 2b)
3. Place each post in a PH3 (PH75/M) post holder. Attach a BA1(/M) base to the
slit, and a BA2(/M) base to the LED holder using 1/2" long 1/4"-20 (12 mm long
M6) cap screws.
The LED mount also has interchangeable adapters for smaller LED sizes.
Next, mount the prism on the KM100PM(/M) prism mount and the grating in its CH1A
mount:
1. GR25-1205 and GR23-0605 gratings each in a CH1A (Figure 3a)
2. PS858 Prism on KM100PM(/M) (Figure 3b)
3. Attach each mount to a TR3 (TR75/M) post, place into a PH3 (PH75/M) post
holder, and attach BA2(/M) bases using 1/2" long 1/4"-20 (12 mm long M6) cap
screws.
a) b)

Advanced Spectrometer Kit
Page 9 MTN002263-D02 Rev C, August 26, 2015
Figure 2 : Adjustable Slit VA100(/M) (a) and LEDMF LED Mount (b) on Ø1/2” Posts
Figure 3 : Grating in CH1A Mount (a), and Prism in KM100PM(/M) Mount (b), both on Ø1/2”
Posts
b)a)
b)
a)