[Detector Tech Specs] [Spectrometer System] [Determination Spectral Resolution] [Emission Spectra] [Holmium Perchlorate] [Lithium Carbonate Spectra] [Deuterium Spectra] [White Light Spectra]

Detector Technical Specifications

File	Description
ILX511.pdf	Sony ILX511 CCD detector 2048 pixels 14um wide by 200um tall
TCD1201D.pdf	Toshiba TCD1201D PDA detector 2048 pixels 14um wide by 200um tall
InGaAs512.pdf	InGaAs Linear Photodiode Array - cooled PDA detector 512 pixels 25um x 500um tall - range 0.9-1.7um
InGaAs1024.pdf	InGaAs Linear Photodiode Array - cooled PDA detector 1024 pixels 25um x 500um tall - range 0.9-1.7um
NIRX-InGaAs.pdf	InGaAs Linear Photodiode Array - cooled PDA detector 512 & 1024 pixels 25um x 250um tall - extended range 0.9-2.2um

Spectrometer System - General Characteristics

Optical input:	SMA 905 connector for single strand optical fiber or probe attachment.
Sensitivity:	Dependant on detector ILX511~80  TCD2101~200  S7011~10 photons per count.
Signal2Noise:	with CCD <=1000:1  with PDA<=2000:1   with InGaAs <3500:1
Stray Light:	for BLUE/GREEN-Wave < 0.1%@435nm;  for BLACK-Comet  <0.02%@435nm < 0.2%@220nm
Linear Range:	0-2.1 absorbance units (< 0.5%)
Exposures:	Standard electronics = 4ms-60 seconds,  LT-12= 2ms-60 sec,  LT-14 = 1ms-60 sec
Resolution:	Depends on Model + slit selection (0.1nm-10nm); for BLACK-Comet  < 0.75nm
Accuracy:	Wavelength < 0.25nm
Repeatability:	Wavelength < 0.05nm
Stability:	Wavelength < 0.001nm per Deg C
Compensation:	StellarNet temperature compensation for detector count stabilization is software selectable. RED-Wave-NIR-InGaAs spectrometers have a Thermo Electrically Cooled (TEC) detectors.

Determination of Spectral Resolution

Resolving-power Resolution (RR)

When closely spaced line emission peaks can be resolved (such as the 577+579nm Mercury doublet) and are clearly separated at Half the Max peak height (HM), the distance between the peak and where its slope intersects the HM is the resolving resolution in nanometer(s).  StellarNet estimates spectrometer resolution using RR.   In a spectrograph with a perfectly imaged detector array, RR will be the nm/pixel dispersion.  Larger slits decrease resolution as the image spreads to adjacent detector pixels.

Line-width Resolution (LR)

When a single peak is measured at its Full Width Half Max (FWHM), the difference where the slopes intersect the HM is the Line-width resolution in nanometer(s).    Conversion from LR to RR use:  LR ~= 2 * RR.

Emission Spectra - HgAr gas and Laser/LEDs

	StellarNet UV Spectrometer, range 200 - 600nm,  with 10um slit installed and 1200 g/mm holographic grating with 0.4 nm resolution.   Optics available in either BLUE-Wave advanced miniature or GREEN-Wave low cost portable spectrometer platforms.
	StellarNet UV spectrometer zoomed to clearly show mercury doublet at 576.9 and 579.0 nm.  The amount area returning to the base line between the adjacent peaks is a good indicator of the instruments resolution.
	StellarNet BLACK-Comet UV+VIS spectrometer, range 190 - 850nm, with 25um slit installed and 590 g/mm concave aberration corrected holographic grating with 0.7 nm resolution.  With NO mirrors the unit has minimal stray light, less components and superb image quality.
	StellarNet VIS spectrometer, range 350 - 1150nm, with 25um slit installed and 600g/mm holographic grating with 2.5 nm resolution. Optics available in either BLUE-Wave advanced miniature or GREEN-Wave low cost portable spectrometer platforms.
	StellarNet model NIR3 spectrometer, range 550 - 840nm, with 25um slit installed and 1800g/mm holographic grating with 0.3nm resolution.   Optics available in either BLUE-Wave advanced miniature or GREEN-Wave low cost portable spectrometers.
	StellarNet model NIR3 spectrometer zoomed to clearly show mercury doublet at 576.9 and 579.0nm.  The amount area returning to the base line  between the adjacent peaks is a good indicator of the instruments resolution.

Absorbance Spectra - Holmium Perchlorate

StellarNet BLACK-Comet UV+VIS spectrometer, range 190-850nm, with 25um slit installed and 590 g/mm concave aberration corrected holographic grating with 0.7 nm resolution.  With NO mirrors the unit has low stray light, less components and superb image quality.

Absorbance Spectra - Lithium Carbonate

StellarNet BLACK-Comet UV+VIS spectrometer, range 200 - 850nm, with 25um slit installed and 590 g/mm concave aberration corrected holographic grating with 0.7 nm resolution.  With NO mirrors the unit has low stray light, less components and superb image quality.

Deuterium Spectra from SL3 Fiber Optic Lamp

StellarNet BLACK-Comet UV+VIS spectrometer, range 200 - 850nm, with 25um slit installed attached via F400-UV fiber optic cable to the StellarNet SL3 Deuterium Lamp.

White Light Spectra from SL1-CAL Lamp

StellarNet BLACK-Comet UV+VIS SpectroRadiometer with NIST traceable irradiance calibration for 300 - 850nm, with 200um slit providing 6nm resolution.  An F400-UV-VIS fiber optic cable attachment with CR1 cosine receptor is measuring the SL1-CAL (irradiance calibration) lamps blackbody curve.  The lamp is a white light (tungsten + krypton gas) with 2800 Kelvin CCT.

 

Deuterium & Halogen Spectra from SL1-Filter plus SL3 coupled by F400YB fiber

StellarNet EPP2000-UVN-SR SpectroRadiometer with NIST traceable irradiance calibration for 200 - 1100nm, with 50um slit providing 2nm resolution.  An F600-UV-VIS fiber optic cable attachment with CR2 cosine receptor is measuring the combined lamp output at the F400YB fiber optic bundle.  The resulting blackbody curve for UV + VIS + NIR is shown.  The F400YB cable can be attached to reflectance probes and transmission fixtures for a variety of spectroscopy measurements requiring high power (21 watt per sq meter) references.