Optics Focus 7ISW151 User manual

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User Manual
7ISW151 Monochromator
Optics Focus Instruments Co., Ltd.

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Contents
1. Features .............................................................................................................................. 2
2. Description.......................................................................................................................... 2
3. Specifications ...................................................................................................................... 2
4. Specifications of Optional Gratings .................................................................................... 3
5. Optical Design ..................................................................................................................... 4
6. Slits Adjustment .................................................................................................................. 5
7. Usage .................................................................................................................................. 6
8. Others ................................................................................................................................. 7
9. Utility Software ................................................................................................................... 8
10. Accessories ......................................................................................................................... 9

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1. Features
 Czerny-Turner optical design for high resolution & maximum throughput while minimizing stray light
& aberrations
 Dual ruled gratings used for high efficiency ultraviolet to visible wavelength scanning
 Single output port version
 Micrometer adjustable slits
 Utility software and an ActiveX Control file included
 Control with USB and RS-232
 Nitrogen connector is available for UV and NIR testing
 Entrance is compatible with our light sources and fiber interface
 Exit is compatible with our single-point detector and other accessories
 The precision worm & gear structure guarantee the high accuracy and repeatability
 Optics chamber and mechanical drive chamber are separated to reduce stray light and pollution to
optical components
2. Description
This series of Monochromators is a high performance, economical and user-friendly monochromator – an
ideal instrument for research and OEM applications.
This series of Monochromators uses an asymmetrical in-plane Czerny-Turner optical configuration. The
optical configuration is designed to ensure high resolution and maximum throughput. The F/4.5
monochromator is optimized to provide excellent stray light rejection while minimizing aberrations. Its
wavelength drive is designed to increase speed as much as possible without sacrificing accuracy or
precision.
Utility software is included to control both the monochromator and filter wheel. An ActiveX Control file
and an easy-to-understand command set are provided for those wanting to create their own programs by
LabView or other programing languages.

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3. Specifications
Model 7ISW151
Focal Length 150mm
F/# F/4.5
Stray Light 5x10-4
Minimum Step 0.0045nm
Number of Gratings Supported 2
Grating Name Grating S30x30x6
Grating Size 30mmx30mm
Standard Gratings OG1200-300(1200g/mm, λp=300nm)
OG600-1000(600g/mm, λp=1000nm)
Wavelength Selection Method Motorized
Output Ports 1
Slits Micrometer Slits
Slits Height 5mm
Slits Width 10µm-3mm
Communication Interfaces RS232 and USB
Size 298mmx200mmx185mm
Center Height of Light Path 140mm (±5mm)
Weight 10kg
4. Specifications of Optional Gratings
Grating
Model
Linear
Dispersion
(nm/mm)
Accuracy
(nm)
Repeatability
(nm)
Resolution
(nm)
Theoretical
Spectral Range
(nm)
Mechanical
Spectral Range
(nm)
OG2400-250 2.7 0.13 0.05 0.2 185-500 0-550
OG1800-250 3.6 0.17 0.08 0.27 185-500 0-730

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OG1800-500 330-730
OG1200-250
5.4 0.25 0.1 0.4
185-500
0-1100 OG1200-300 200-600
OG1200-500 330-1000
OG600-300
10.8 0.5 0.2 0.8
200-600
0-2200
OG600-400 260-800
OG600-500 300-1000
OG600-750 500-1500
OG600-1000 660-2000
OG600-1250 830-2200
OG300-500
21.6 1.0 0.4 1.6
330-1000
0-4400
OG300-1250 830-2500
OG300-1800 1200-3600
OG300-3000 2000-4400
OG150-4000 43.2 2.0 0.8 3.2 2600-8000 0-8800
OG66-DB 97 4.6 1.8 7.3 2500-25000 0-20000
OG50-12000 130 6 2.4 9.6 8000-24000 0-26400
5. Optical Design
This series of monochromators uses unsymmetrical horizontal light paths and changes the off-axis angle to
correct coma, improves symmetry of spectral lines and improves resolution.
Eliminating secondary dispersion is designed to restrain stray light. The F/4.5 monochromator is optimized
to provide excellent stray light rejection while minimizing aberrations.

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7ISW151 Monochromator optical design
6. Slits Adjustment
This series of monochromators uses micrometer adjustable slits with sharp stainless-steel blades. The
narrowest practically achievable width is 10 μm. The slit is 5 mm high and its width can be adjusted from
10 μm to 3 mm.
The slit uses micrometer head with 10μm graduations to drive the width of slits. The displacement is
0.25mm per revolution.

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7. Usage
Cable Connection:
 Connect 9-pin connector of monochromator to the RS232 serial port of computer. Or connect
the monochromator to computer by USB line.
 If you have bought our 7IFW6 filter wheel, please connect 15-pin connector of monochromator
to the 9-pin connector of 7IFW6 filter wheel.
 Connect power socket.
After connecting all the cables firmly, turn on the power of the instrument. The red indicator light will
be lighted up to represent normal power supply. If the red light is not lighted up, please check the fuse
or power socket.
After you turn on the power, you will hear worm gear is rotating. That means the instrument is making
self-checking and resetting. After finishing self-checking, the instrument will stop automatically and wait
for communication with computer.
Now you can run the 7ISWS application software and select the actual RS232 port to make

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communication. During the self-checking, the instrument cannot communicate with computer and the
software will prompt the communication was failed. Please exit the software, after self-checking is
finished (the sound of rotation is stopped), rerun the software and select the actual RS232 port, the
communication will be successful.
You can use software to operate the instrument to automatically change the wavelength, scan spectrum,
switch gratings and change filters (if you have bought 7IFW6 filter wheel from us). Please refer to the
software manual.
Note: To avoid damage of computer and instrument, please do not plug / unplug cables when the
instrument is still power on.
8. Others
Fiber adapter
If you have bought the adapter for SMA905 fiber from us, please replace the cover of the slits with the
fiber adapter and connect the fiber directly.
Nitrogen connector
To avoid the absorption of air, you can fill the monochromator with nitrogen in ultraviolet and near
infrared band to improve the efficiency. There is a specific nitrogen connector with the
monochromator.
When you need to use it, remove the cover and install the nitrogen connector, then connect the
nitrogen pipe. Note: The nitrogen connector can’t be used for other gases.
The nitrogen is a kind of non-toxic, pollution-free, non-irritating and non-corrosive gas, so you can keep
filling it during the whole experiment to keep the nitrogen concentration and positive pressure in the
instrument. The excess gas will leak off through gaps.

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9. Utility Software
The utility software is included at no extra cost with all models to control both the
monochromator/Spectrometer and filter wheel accessory. The utility software provided with the
monochromator/Spectrometer includes USB drivers for Windows 7 32-bit and 64-bit operating systems.
The software can also control the instrument through an RS232 or USB connection. Please refer to the
Software Manual provided with the monochromator/Spectrometer for instructions on installation and
use.
Utility Software Screens

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10. Accessories
1 x 220V line cord or 110V line cord
1 x RS232 cable
1 x USB cable
2 x 3A fuse
1 x Nitrogen connector