Monochromator and Spectrographs
Sciencetech offers a wide variety of standard monochromators in Seya-Namioka optical layout and Czerny-Turner configuration. We have Small Series Monochromators, Standard Series Monochromators and High Resolution Series Monochromators. See the Monochromators and Spectrographs Table to compare Sciencetech monochromators across different product lines.
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| Small Series Monochromators | Standard Series Monochromators |
Sciencetech Monochromators Models
Sciencetech design and fabricate more than twenty different variants of monochromators; as shown in the following table. Some Sciencetech monochromators models have a computer controlled interchangeable 3-grating turret for automatic grating and wavelength selection:
|
Model |
Focal Length(mm) |
Aperture |
Resolution (nm) |
Dispersion (nm/mm) |
SpecialFeatures |
|
100 |
f/3.2 |
1 |
8 |
Compact Monochromator |
|
|
8030DC |
61 |
f/2 |
8-10 |
52.38 |
Dual Channel Compact Spectrograph |
|
100 |
f/3.2 |
0.5 |
4 |
Double Additive and Double Subtractive |
|
|
100 |
f/3.2 |
1.0 bandpass |
Effectively 0 |
Double Subtractive Monochromator |
|
|
8010 |
200 |
f/3.5 |
0.5 |
4 |
Manual Spectrograph |
|
200 |
f/3.5 |
0.4 |
4 |
Manual Monochromator |
|
|
9010F |
200 |
f/2.6 |
1 |
4 |
Manual Monochromator |
|
200/250 |
f/3.5 |
0.18 |
3.3 |
Computer Controlled Monochromator/Spectrograph |
|
|
200/250 |
f/2.5 |
0.4 |
3.3 |
Computer Controlled Monochromator/Spectrograph |
|
|
200 |
f/3.5f/2.7 |
0.15 |
3.3 |
Imaging Spectrograph |
|
|
500 |
f/8 |
0.1 |
1.79 |
Computer Controlled Monochromator/Spectrograph |
|
|
500 |
f/5.9 |
0.1 |
1.79 |
Computer Controlled Monochromator/Spectrograph |
|
|
200 X 2 / 250 x 2 |
F/3.5 |
0.1 |
1.79 |
Double Additive and Double Subtractive Monochromator |
|
|
496 |
f/6.9,f/5.2,f/4 |
0.03 |
1.53 |
High Resolution Half Meter |
|
|
500 x 2 |
f/6.9,f/5.2,f/4 |
0.02 |
0.76 |
Double Additive Half Meter |
|
|
500 |
f/6.9, f/5.2, f/4 |
0.03 bandpass |
Effectively 0 |
Double Subtractive Meter |
|
|
914/1000 |
f/10,f/7 |
0.017 |
0.83 |
High Resolution One Meter |
|
|
914X2 |
f/10,f/7 |
|
0.42 |
Single and Double Pass |
|
|
1500 |
f/12 |
0.008 |
0.53 |
High Resolution1.5 Meter |
|
|
1500X2 |
f/12 |
0.005 |
1.25 |
Single and Double Pass |
|
|
1500 |
f/25 |
0.001 |
0.5 |
Single Pass CCD System |
|
|
|
|
|
|
|
|
*Resolutionand Dispersion values measured with a1200 lines/mm grating
Contact us for more info or request a quote
Standard Series Monochromators - Configuration
Standard series monochromators can be configured in a number of different ways. Note that each standard series monochromator includes a Sciencetech SS-80 variable slit assembly. The included slit is usually mounted on the Monochromator input port.
|
Part # |
Product |
|
INPUT PORT CONFIGURATION |
|
|
Standard |
Front input |
|
120-8042 |
Side Input Port for 9055/35/57/60 |
|
120-8030 |
Dual Input Ports for 9055/35/57/60 |
|
OUTPUT PORT CONFIGURATION |
|
|
Standard |
Front output |
|
120-8043 |
Side Output Port for 9055/35/57/60 |
|
120-8031 |
Dual Output Ports for 9055/35/57/60 |
Grating Monochromator Selection
Grating selection is a crucial part of building a monochromator. Each ruled or holographic grating is designed to diffract light most efficiently over a specific band of wavelengths. Generally ruled gratings are designed with a ‘blaze’ wavelength at which the grating diffraction efficiency is a maximum. Gratings also vary by the line density (ruled lines/mm). The smaller a gratings line density is the larger the angular separation will be between two adjacent diffracted wavelengths.
A monochromator’s dispersion is a function of the monochromator’s focal length and the line density of the grating installed in the monochromator.
Generally each grating has a measured efficiency curve. The efficiency curve is usually provided with the grating in Littrow condition. Under Littrow condition the diffracted wavelength retraces the optical path of the incident radiation on the grating surface. Sciencetech’s monochromators do not operate in Littrow condition therefore it should not be expected that the grating efficiency when installed in the monochromator will be exactly the same as the measured grating efficiency curve under Littrow condition.
Go to Grating Selection
Mechanical Limitations
Sciencetech’s line of Standard and Hi-Res monochromators have similar mechanical limitations below is a list of mechanical limitations related to the Sciencetech 9055 monochromator.
Dispersion ~= 5000 / n ; Where n = grating lines/mm
Bandwidth based on: Dispersion * 25.4mm wide array (important if using a LDA or CCD)
Resolution based on: 50um wide input slit * Dispersion
|
Grating (l / mm) |
75 |
150 |
300 |
600 |
1200 |
1800 |
2400 |
|
Dispersion (nm/mm) |
66.6 |
33.3 |
16.7 |
8.3 |
4 |
2.8 |
2.1 |
|
Resolution (nm) |
3.75 |
1.6 |
0.8 |
0.4 |
0.2 |
0.134 |
0.1 |
|
Bandwidth (nm) |
1200 |
600 |
300 |
150 |
75 |
32.5 |
16.25 |
|
Maximum Suggested Wavelength(nm) |
13900 |
6950 |
3475 |
1737 |
868 |
579 |
434 |
|
Maximum Realistic Wavelength(nm) |
21891 |
10945 |
5472 |
2736 |
1368 |
912 |
684 |
|
Maximum Wavelength Attainable(nm)** |
25377 |
12688 |
6344 |
3172 |
1586 |
1057 |
793 |
** From sin(alpha) + sin(beta) = 10^-6 * k * n * lambda , where alpha = 90 degrees, beta = 90-25.4=64.6
Monochromator Accessories
There are many accessories available for Sciencetechs line of small, standard and hi-res monochromators. For a complete list of accessories see the products in the Modular Spectroscopy Equipment list.
