introduces a low cost line of research grade fluorescence systems
designed for a wide range of applications requiring high sensitivity
measurements of powders, liquids, and surfaces. StellarNet, inventor of
the miniature fiber optic concave grating spectrometer, has
configured systems specifically for low-light applications and, as
always, StellarNet instrumentation is built modularized, compact, and
rugged for field, process, or lab environments.
The BLACK-Comet miniature, concave grating
spectrometer is the main component of the system and is preconfigured
with high throughput optics, low noise circuit design, and an
ultra-sensitive detector array with for extreme low-light level
detection from 200-1100nm. These concave grating instruments have ultra
low stray light and enhanced sensitivity due to their superior grating
technology. As opposed to the industry standard Czerny Turner optical
design used in most miniature spectrometers, which employ mirrors and a
plane grating, the BLACK-Comet’s concave grating is the
sole element in the optical grating design, thus reducing the amount of
surfaces in the light path. Scattered light is thus drastically reduced
to 0.02% at 435 nm and 0.2% at 200 nm. The BLACK-Comet
grating has an f-number of f/2 which provides nearly 4-5 times the
system light collecting ability compared to competing models with
f-numbers of f/4 and f/5. Additionally, the aberration corrected grating
provides broadband uniform resolution and excellent spectral shapes. An
integrated thermo electric cooler (TEC) can be added to the detector
array to maintain -10 °C from ambient and achieve a +/-0.1 °C
temperature stabilization increasing the S/N ratio by 60% at long
exposure times, thus dramatically enhancing the instruments dynamic
range. These design optimizations make the BLACK-Comet-TEC
concave grating spectrometer one of the premier miniature spectrometers
for low light detection available.
StellarNet fluorescence systems are rugged and shock-proof with no
moving parts and are suitable for field applications, factory and
industrial conditions; even perfect for a standard laboratory benchtop!
With the emergence of low cost narrow band LEDs, StellarNet is now
offering a multitude of different LED wavelengths to suite your specific excitation
SL1-LED excitation source is ideal for
Fluorescence measurements. The light source includes the SL1-Blue
plus an LED kit consisting of 6 Visible range LED’s
and a White LED with
many UV LEDs available. LED’s
be swapped without any wiring changes - just
pull one out and push the next one in!
LED kit emission spectrum
spectrometer. LEDs are available for many excitation
UV-VIS & Fluorescence Measurements
light concave gratings optics allow Deep
Concave gratings provide uniform
resolution over 190-1100nm
- LED excitation source for
low cost alternative to laser or bandpass filters
Powder Lanthanide complex luminescence using BLACK-Comet
R600-8-UVVIS-SR fluorescence probe with
optical fibers bundled around 1 600μm fiber.
For fluorescence measurements the 7 exterior fibers are illuminated
by a high output excitation source such as our SL1-LED and the
interior fiber collects light emission and returns the signal to the
spectrometer. Inline filters can be added to the system to remove
excitation frequency artifacts.
Using BLACK-Comet-TEC Concave
Grating Spectrometer, CUV-F cuvette holder, and
SL1 excitation source. CUV-F is a
that includes a large base to accommodate the SL1-LED
excitation source. Includes 600 micron Y-fiber for dual pick-up for
x2 signal gain in fluorescence detection.
and Setup Diagrams
Concave grating provides high sensitivity
throughout wavelength range (due to flat field
created by special concave grating)
No mirrors for lowest possible stray light
Extremely rugged with no moving parts
Shock-proof durability and permanent alignment
Miniature size, low cost, portable
Battery pack options for field measurements
Simple USB2 interface to notebook & desktop PCs
Concave Grating Spectrometers
The units have an integrated data digitizer with a
65,000 count magnitude for any detector integration period. The
detector can be selected to integrate from 1
milliseconds to 60 seconds, extending the detection limits for small
An integrated thermo electric cooler
(TEC) can be added to the detector array to maintain -10 °C from
ambient and achieve a +/-0.1 °C temperature stabilization increasing
the S/N ratio by 60% at long exposure times, thus dramatically
enhancing the instruments dynamic range.
StellarNet systems also include high efficiency fluorescence probes
for solids, powders, and surfaces, and cuvette holders and flow
cells with dual fiber optic pickup for liquid samples. Additional
NIR spectrometers can be coupled to the system for extended range
and detection to 1700nm.
The SpectraWiz Spectroscopy Software is included for real-time
spectral analysis, episodic spectral capture, ChemWiz concentration
analysis, and has applications for Colorimetry, Radiometry and OES
spectroscopy. Look for StellarNet concave grating based fluorescence
systems for your next fluorimetry application!
The instruments are
constructed in a small rugged enclosure, with a fiber
optic SMA connection on the front panel.
Portable spectrometers have an easy to use plug and
play interface with USB-2 connection.