How does it
work ?
The
ARCspectro ANIR products family uses the so-called
Lamellar Grating Interferometer. The Lamellar Grating
Interferometer is a grating having a variable depth. Contrary to
the Michelson interferometer, which splits the amplitude at the
beamsplitter, the Lamellar Grating Interferometer splits the
wavefront at the grating and, consequently, does not need a beamsplitter. By
using an exclusive micro-mechanical scanning systems, we have been able to build the first
truly portable, handheld scanning Fourier Transform
Spectrometer, which makes the
ARCspectro-ANIR products family unrivaled
in its category.
Apart of its particular functioning principle, the
ARCspectro ANIR is a typical fibered NIR spectrometer and can be
used with the same assecories as for standard fibred grating
spectrometer. Cuvette holder or reflection probes
from other suppliers can be
connected to an halogen lamp and the ARCSpectro-ANIR
spectrometer.
Ideally
the spectrometer should be connected with 0.6mm core NIR fibres
for maxiaml troughput of the system. A 10 or 20 W
halogen lamp is sufficient for most applications.
Reflection and transmission Measurement examples can be found in
this pdf file:
DOWNLOAD.
Applications:
-
Food, beverage & dairy
-
Agriculture
-
Gas detection
-
Environmental monitoring
-
Security and defense
|
-
Cosmetics
-
Textile
-
Plastics
-
Process control (Solar cells characterization, Chemical
monitoring, Pharmaceutical manufacturing).
-
... And many other
|
General Specs table (valid for all
the models described above):
|
Features |
ARCspectro ANIR |
|
Spectral resolution
in wavenumber: |
8cm-1 |
Spectral resolution
in wavelength:
at 1000nm:
at 1700nm:
at 2600nm: |
1.5
nm
4
nm
9
nm |
|
Wavelength Stability |
<
0.1nm |
|
Absolute
Wavelength accuracy |
<
0.5nm |
|
Long term Intensity stability |
< 2% (1100-2500nm) over 10
hours |
|
Minimum scan time |
1
s |
|
Effective Measurement time |
3
s |
|
Optical
Fiber Connector |
SMA 905 |
|
Optical
entrance |
0.55 mm |
|
Sampling
Rate |
125 kHz |
|
A/D
Converter |
24 bit |
|
Operating Voltage |
5V (USB powered). Except for MIR
version (TE cooling need external powering). |
|
Operating
temperature |
10°C-30°C |
|
Entrance aperture |
1 mm (or fiber diameter) |
|
Communication Interface |
USB 2.0 |
|
Software Interface |
Windows XP |
|
Product Dimensions (including
electronics) |
10cm
x 15cm x7cm |
|
Product Weight |
850
g |
Features and benefits
Active laser position control:
Permits to control the scan precisely at every measurements and
to enhance reability of the system.
Lamellar Grating Interferometer principle:
-
The lamellar grating interferometer
presents an optimal configuration for miniaturization
-
Contains no transmitive
elements such as a beam-splitter for example (necessary in the Michelson interferometer configuration).
-
The lamellar interferometer
is a common path interferometer. This means that the light
travelling along the two arms of the interferometer follow almost
the same geometrical path which minimizes the impact of
environmental fluctuations.
Optional parameter:
Variable gain
and resolution permit to optimize
measurement parameters.
Distinct advantages
of the
ARCspectro-ANIR
1 single photodiode (no need of CCD):
Single photodiode instead of a CCD line leads to low noise and
cost-effective detection solutions, particularly in the
NIR.
The choice of available detectors is much larger than CCD. In
addition, it is much easier to dedicate a detector to specific
needs. Also there are no defect pixels
no
gain fluctuation and no dark current fluctuation
(between pixels)
as it is generally
the case for NIR
2.6
mm
CCDs.
Also MIR wavelength range (2-4.5 um) can
only be
measured with a scanning systems.
Wide wavelength range
combined with high resolution:
Thanks to its operating principle, the
ARCspectro-ANIR presents a relatively high resolution combined
with a large spectral range. Compared to multichannel NIR
grating spectrometers that has only a limited amount of pixels
(max. 256 pixels) at disposal (around 15 nm resolution can be
obtained)
Attractive pricing
:
Since the ARCspectro-ANIR does not use very expensive InGaAs
photodiode arrays, production prices are somewhat lower than for
high resolution grating spectrometers.
More cost-effective solutions than ever possible before.
Software
The ARCspectro-ANIR
series is delivered with a free windows XP,2000, compatible program.
The software recognize automatically the spectrometer (USB plug and play system)
and
is able as other conventional spectrometer software to:
- Display
real time spectral measurement results
- Configure
measurement parameters (integration time, averaging).
- Choose
Transmission or Reflection mode
- Usual
features such as save, open, zoom, rescale...
- Some
specific features related to Fourier transform spectrometry:
choose apodization (automatic recognition option), look and
save the interferograms.
On demand application specific features can be implemented
in the program within a few weeks.
Visit our custom software page.
Also free Labview Vi's
for driving the spectrometer are available on demand.
USB Infrared lamp:
The
Arcoptix USB lamp is a compact usb powered holgen lamp. The USB
lamp features a SMA 905 connector for easy coupling in optical fibers.
The lamp can via fibers be connected to a sample holder, reflection
probe or to an integration sphere.
The USB lamp features also a smart power control for high lamp
stability, a mechanical variable shutter for power output control and
an integrated cuvette or filter holder. the USB empowering makes the
lamp ideal for on the field spectral measurements.
The USB lamp is
available in two versions one optimized for VIS-NIR and a second
version with CaF2 optics for the MIR region (the limit 4500nm is given
by the lamp emission):
| |
USB – NIR |
USB – MIR |
|
Spectral range (nm) |
400 – 2600 |
400 – 4500 |
|
Collimation optics |
BK7 |
CaF2 |
•
USB powered with optional external line
•
Wavelength
range from 400 nm up to 4.5
mm
•
Excellent stability
•
Mechanical
intensity tuning
•
Integrated slot for cuvettes and samples
|
Features |
USB LAMP |
|
Lamp type |
Halogen
|
|
Bulb temperature |
2230 K |
|
Stability |
< 1% |
|
Bulb live time |
30’000 h |
|
Fiber optical connector |
SMA 905 |
|
Operating voltage |
5 V - 0.5 A (USB
powered) |
|
Operating temperature |
10°
- 40°C |
|
Communication interface |
UBS 2.0 |
|
Shutter |
Mechanical |
|
Software interface |
Windows XP
|
|
Product dimensions |
70 mm x
70 mm x 60 mm |
|
Weight |
450 g |
T
