THORLABS EDU-SPEB1 Manual de usuario

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)

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