in the 200-600nm or 380-750nm ranges
as low as 0.4nm with high performance concave grating optics
- Perfect spectral
imaging with no mirrors for lowest possible stray light
- Flat field
imaging for uniform resolution
- No optical
adjustments for extreme thermal stability
inventors of the first miniature, concave grating spectrometers,
introduces the newest member to its BLACK-Comet line-up: the
BLACK-Comet-HR. Designed for high resolution applications, the
new BLACK-Comet-HR spectrometer is available for measurements
in two ranges UV (200-600nm) and Visible (380-750nm),
and achieves resolving resolutions of 0.4nm. This 16-bit concave
grating spectrometer is USB-2 powered, shock-proof and vibration
tolerant with no moving parts, includes the powerful SpectraWiz®
spectrometer software and development kit, and is available
at an extremely low price of $2,950.
UV-VIS spectrometers utilize a 40mm diameter concave grating
with aberration correction to provide superb spectral imaging.
This significantly improves spectral shapes by reducing comma
and astigmatism found in plane grating spectrograph designs.
The spectrograph architecture does not utilize mirrors, and
therefore provides the lowest possible stray light in the
UV with additional assistance from the holographic line grating.
The concave grating produces a flat field on the CCD detector
creating uniform resolution over the entire range.
One of the
main advantages of the BLACK-Comet is its ability to drastically
reduce straylight levels, 0.02% at 435 nm and 0.2% at 200
nm, the lowest values of any field spectrometer. By design,
the holographic grating has a smoother surface than the normal
ruled gratings used in competing spectrometer models. Surface
roughness is the primary source of grating generated straylight
and thus by employing superior grating technology, StellarNets
Concave Grating Spectrometers are able to drastically reduce
the effect. Additionally, grating scatter in the standard
Czerny Turner design is collected and focused by the focusing
mirror toward the exit port, this does not occur with the
BLACK-Comet. When additional optical components like collimating
and focusing mirrors are used in instrument design, it is
more likely that light may be rediffracted and scattered.
Similarly, due to the spectrometers ability to reduce light
scatter, especially high power UV light, the Concave Grating
spectrometer provides two to three times enhanced UV sensitivity
as compared to plane grating/Czerny Turner optical configurations.
Optical bench with concave grating
units are ruggedized. As shown above the detector is bolted
in position and military grade epoxy holds the concave grating
in place making the instruments vibration tolerant, durable,
and suitable for just about any lab and/or field measurement.
A multi-band filter is integrated into the spectrograph to provide
order sorting and prevent optical aliasing. The instruments
optical input is attached via standard SMA-905 connector, using
single strand fiber optic cable with typical silica core diameters
of 400um, 600um, 1000um.
Spectrometers from $2950 / €2490
with 6 decades
69 x 100 x 150 mm
nm (14µm slit)
mA via USB port
CCD, PDA opt.
||UV = 200-600nm,
VIS = 350-750nm
|| 3x / 40x
faster than USB-1
||14 x 200
||1ms to 65s
||14, 25, 50,
435nm; 0.2% at 200nm
|| f/2, Flat
field No mirrors
NA single fiber
||Win XP, Vista,
7, 8, & 10
program & apps
free programs for:
Optical Metrology and Colorimetry XXX
BLACK-Comet UV-VIS spectrometer model CXR-25 (-25 denotes slit size)
measuring the transmission of a blue plastic film using a SL1 tungsten
halogen lamp, TXF-4 transmission fixture, and two F600-VIS-NIR fiber
optic cables and providing colorimetric data in CIELAB color space.
Go to the colorimetry page.
Solar Irradiance Monitoring XXX
BLACK-Comet-SR in DSR-CSR-512 system measuring solar irradiance. The
dual blaze concave grating allows for superb spectral imaging from
Spectral sensitivity is one of the most important factors in choosing
the proper miniature spectrometer. The concave grating optical design
allows for high sensitivity and a smooth spectral distribution over
the wavelength range as shown in the above spectrum of a Tungsten
UV-VIS Absorbance System XXX
StellarNets Low Cost UV-VIS Spectrometer system is composed
of the BLACK-Comet research grade concave grating spectrometer, a
SL5 high stability light source with integrated cuvette holder, and
an optical coupling fiber. Above is the absorbance spectrum of various
TTL input trigger to enable spectrometer scan $100
Units may be daisy chained via USB-2 hub allowing simple configurations
for dual and multi-beam process applications. 8 BLUE-Wave spectrometers
can be operated at once!
The system includes a high speed plug & play interface using
- Optical Metrology