Research Grade
Concave Grating Spectrometer Features
• Measurements in the 190-850nm or 280-900nm ranges
• High performance concave grating optics for UV-VIS applications
• Superb spectral imaging with no mirrors for lowest possible stray light
• Enhanced UV Sensitivity & Flat-field imaging for uniform resolution
• No optical adjustments for extreme thermal stability and ruggedness
• Thermo-electrically Cooled Detector (TEC) upgrade increases S/N by 60%
• BLACK-Comet-SR (Super Range) for wide range applications 200-1100nm
• BLACK-Comet-HR (High Resolution) for high resolution applications <0.4nm
BLACK-Comet Spectrometer Overview
StellarNet BLACK-Comet concave grating spectrometers deliver high performance for spectroscopy applications in the UV-VIS wavelength ranges covering 190-850nm (model C), or optionally 280-900nm (model CXR)
Research Grade Optical Performance – The BLACK-Comet UV-VIS spectrometers utilize a 40mm diameter concave grating with aberration correction to provide the best optical performance of any compact spectrometer on the market.
• Improved spectral shapes by reducing comma and astigmatism found in plane grating spectrograph designs.
• Stray light reduction- The spectrograph architecture does not utilize mirrors, and therefore provides the lowest possible stray light, which is especially helpful for UV applications.
• Enhanced sensitivity- due to the spectrometers ability to reduce light scatter, especially high power UV light, the BLACK-Comet provides two to three times enhanced UV sensitivity as compared to plane grating/Czerny Turner optical configurations.
• Uniform resolution – The concave grating produces a flat field on the CCD detector creating uniform resolution over the entire spectral range.
• Thermal Stability- Optical bench architecture without mounting turrets and optical posts (typically in most USB spectrometers) decreases thermal expansion and contraction and increases overall system performance with temperature change
BLACK-Comet Optics- The concave holographic grating is aberration corrected and has no mirrors to minimize stray light with superb imaging projecting a flat field on the detector
Various models provide a choice of wavelength range and slit resolutions. New and improved electronics with a high speed 16-bit digitizer allows for fast data acquisition and a signal to noise of 1000:1!
Ruggedized – The detachable spectrograph assembly and control electronics are protected inside a rugged metal enclosure, suitable for portable, process, lab, and field applications.
Multi-unit connection (up to 8) can be daisy chained together and are able to run simultaneously.
USB Powered – BLACK-Comet UV-VIS spectrometers can be powered directly from your PC’s USB-2 port. A single strand fiber optic cable or probe assembly delivers input via standard SMA 905 fiber optic connector with a choice of cable lengths.
Onboard Memory with pre-set calibrations and spectrometer settings and snap shot memory to provide instantaneous spectral image from the highly sensitive CCD with 2048.
High Speed Electronic Interface can be attached directly to a computers USB port for high speed data transfer. Options for Wifi/ethernet communication available as well as other interfaces.
Standard Models
BLACK-Comet
Wavelength
Range (nm)
Grating
g / mm
Slit-200 nm res.
Slit-100 nm res.
Slit-50 nm res.
Slit-25 nm res.
Slit-14 nm res.
BLK-C 190-850 590 6.0 3.0 1.5 0.85 0.75 BLK-CXR 280-900 590 6.0 3.0 1.5 0.85 0.75
Deuterium Lamp Spectra Tungsten Halogen Lamp spectrum Grating Efficiency Curve* StellarNet technical staff is currently updating available web database. Send us an email at ContactUs@StellarNet.us if you want a specific spectrum that hasn’t been posted yet
Technical Specifications
Specifications: BLACK-Comet Spectrometers
Dynamic Range:
2000:1 with 6 decades
Dimensions:
69 x 100 x 150 mm
Optical Resolution:
< 1 nm Resolving Res. with 25um slit
Power Consumption:
100 mA @ 5 VDC
Detector Type:
2048 pixel CCD, PDA opt.
Interface:
USB-2
Detector Range:
C=190-850nm or CXR=280-900nm
Data Transfer Speed:
3x / 40x faster than USB-1
Pixel Size:
14 um x 200 um
Detector Integration:
1 ms to 65s (New! 8 minutes exposures)
Concave Grating:
Aberration corrected
Slit Size Options:
14, 25, 50, 100, 200 um
Grating Type:
Holographic, 590 g/mm
Stray Light:
0.02% at 435 nm; 0.2% at 200 nm
Spectrograph:
f/2, Flat field – No mirrors
Fiber Optic Input:
SMA905 0.22 na single fiber
Order Sorting Filter:
Integrated multi-band
Operating Systems:
Win XP, Vista, 7, 8, & 10
Signal to Noise:
1000:1 CCD, *TEC optional upgrade
Software Included:
SpectraWiz program & apps
Digitizer:
16-bit
Also Free Programs For:
LabView / VC / VBA / Delphi
*BLACK-Comet TE Cooler upgrades reduce the temperature of the CCD to 15 degrees below ambient and increase instrument S/N by 60% at long exposures, improving low light measurement quality for fluorescence and other weak emission applications. In order to achieve low temperatures the TEC add-on includes a new sealed and isolated detector enclosure with specialized heat sink and air flow design for added stability and cool operation.
Detector TEC Upgrades
BLACK-Comet TE Cooler upgrades reduce the temperature of the CCD to 15 degrees below ambient and increase instrument S/N drastically by reducing noise over 50% at long exposures. This upgrade improves the compact spectrometer’s measurement quality and makes it a perfect solution for fluorescence and other weak emission applications. In order to achieve low temperatures the TEC add-on includes a new sealed and isolated detector enclosure with specialized heat sink and air flow design for added stability and cool operation.
Low light spectral measurement of a dim backlit LED display. The display measurement is performed with a BLACK-Comet-TEC spectrometer with the thermo-electric cooler ON and OFF at a 30 second exposure time. The background noise is drastically reduced, increasing instrument detection capabilities.
BLACK-Comet Sample Spectra
Optical Metrology and Colorimetry
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
BLACK-Comet-SR in DSR-CSR-512 system measuring solar irradiance.The dual blaze concave grating allows for superb spectral imaging
from 220-1100nm.
BLACK-Comet Sensitivity
Spectral sensitivity is one of the most important factors in choosing theproper 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 Halogen lamp.
UV-VIS Absorbance System
StellarNet’s Low Cost UV-VIS Spectrometer system is composed ofthe 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 sugars.
Optical Metrology and Colorimetry 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.
商品属性 [波长范围] 190-900nm [光学分辨率] 0.75-6nm