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QE Optical Bench OptionsBelow is a diagram of the “QE” Optical Bench used in the QE65000 Scientific-grade Spectrometer. It shows how light moves through the symmetrical crossed Czerny-Turner design of the bench. You can choose various entrance aperture sizes, detector accessories, filters, gratings and more to optimize your spectrometer.
A precision SMA 905 Connector aligns to the spectrometer’s entrance slit and ensures concentricity of the fiber. For an upgrade fee that includes the cost of the custom connector and labor, we will replace the standard SMA 905 Connector with a different connector of your choice. We also offer connector adapters, such as an SMA-to-ST Adapter and an SMA-to-FC Adapter. Please call for details on custom connectors and adapters.
You can replace standard aluminum-coated reflective mirrors with our proprietary, UV-absorbing SAG+ Mirrors, which increase reflectance in the VIS-NIR and, in turn, increase the sensitivity of the spectrometer. SAG+ Mirrors are often specified for fluorescence. These mirrors also absorb nearly all UV light, which reduces the effects of excitation scattering in fluorescence measurements. Unlike typical silver-coated mirrors, the SAG+ mirrors won't oxidize. They have excellent reflectivity -- more than 95% across the VIS-NIR. The price of the SAG+UPG-HR is $290.
You choose from among 14 gratings for each spectrometer. With each grating, you consider its groove density (which helps determine the resolution), its spectral range (which helps determine the wavelength range) and its blaze wavelength (which helps determine the most efficient range). Click here for your Grating & Wavelength Choices. Predicted Ranges & Resolutions See a series of graphs to demonstrate the predicted Range and Resolution of your QE65000 Spectrometer.
The QE65000’s Hamamatsu S7031-1006 FFT-CCD area detector provides 90% quantum efficiency -- defined as how efficiently a photon is converted to a photoelectron. The TE-cooled detector features low noise and low dark signal, which enables low-light-level detection and long integration times, thus achieving a wide dynamic range. The S7031 is a 2D array, which allows us to bin pixels in a vertical column to acquire light from the entire height of the spectrometer’s slit image. This improves light collection and signal-to-noise signif-icantly. Because the detector is back-thinned (or back-illuminated), it has great native response in the UV and does not require the UV detector upgrade that we apply to other detectors. In our spectrometers with linear CCDs, the slit’s width, not its height, regulates the amount of light entering the bench because linear CCDs cannot efficiently collect the light from the entire height of the slit. But in the QE65000, the 2D area detector can better take advantage of the height of the entrance slit and the additional light, greatly improving system sensitivity. The Hamamatsu S7031-1006 FFT-CCD area detector is included in the price of the QE65000 Spectrometer.
The OFLV-QE is one of our Variable Longpass Order-sorting Filters used to eliminate second-order effects and is used with an HC-1 Grating in a 200-950 nm wavelength range system in a QE65000. We use patented coating technology to apply the filter onto the substrate of the detector’s window. The OFLV-QE is Call for Price.
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Another option available with "QE" User-configured
Spectrometers is selecting the size of the entrance aperture. Entrance slits are
rectangular apertures, 1-mm tall and various widths from 5 µm to 200 µm,
with the width determining the amount of light entering the bench. Note
that the smallest slit achieves the best optical resolution. (For more on
how your slit choice affects optical resolution,
We offer longpass absorbing or blocking
filters; each filter has a transmission band and a blocking band to
restrict radiation to a certain wavelength region for eliminating second-
and third-order effects. These filters are installed permanently between
the slit and the clad mode aperture in the bulkhead of the SMA 905
Connector.
