Ocean Optics Ventana User Manual
Ventana Data Sheet
Description
The Ocean Optics Ven tana ser ies of hig h-sensitivity spectrometers maintain high sensitivity and
throughput for low-light level applications such as Raman analysis or fluorescence with laser
excitation without the need for long integration times or high-power excitation sources. This
spectrometer uses an HD Volume Phase Holographic (VPH) Grating, low f/# design and antireflection coatings to allow more of the coupled light into the spectrometer. The internal optics have
been selected to minimize light loss and provide superior image quality. The Ventana models include
the following:
• Ventana-785-Raman -- preconfigured for 785 nm excitation Raman measurements; includes a
cooled (down to 15 °C) NIR-enhanced, back-thinned detector with low noise electronics
• Ventana-532-Raman -- preconfigured for 532 nm excitation Raman measurements
• Ventana-785L-Raman -- preconfigured for 785 nm excitation Raman measurements with
integrated 785 nm laser; free-space coupling to maximize sensitivity; front-end laser matches
the ƒ/1.3 spectrometer input to maintain maximum efficiency; hard-coated filters used to
maximize transmission and minimize Rayleigh scattering
• Ventana-VIS-NIR -- preconfigured with 430-1100 nm bandwidth, 50 micron slit; low f/2;
configuration optimized for low signal VIS-NIR measurements (430 to 1100 nm) such as
fluorescence; low f/# with custom lens design and optic coatings providing superior image
quality and high transmission
All model Ventana spectrometers use the Hamamatsu S11510-1006 back-thinned, reduced etalon
detector except for the VIS-NIR version, which uses the Hamamatsu S10420-1006 detector. For
complete details on these detectors, visit www.Hamamatsu.com.
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Ventana Data Sheet
In addition to the Ventana spectrometer s, the Ven tana-785-Probe offers a Raman-coupled fiber probe
for 785 nm excitation; FC connector (excitation), SMA connector (collection); 11.0 mm working
distance; 250-2000 cm-1; comes with 600 µm 0.39 NA detection and 100 µm 0.22 NA excitation
fibers to maximize sensitivity.
Features
• HD Volume Phase Holographic (VPH) Grating
• Electrical Performance
• 16 bit A/D converter
• Communications: USB
• Software compatibility:
• OceanView (1 complimentary license included with purchase)
• SpectraSuite
• OmniDriver (sold separately)
• USB Programmer (available free from Ocean Optics)
• SeaBreeze (sold separately)
• Optical input: SMA 905
• Regulations:
• CE Mark
• RoHS
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Ventana Data Sheet
Specifications
CCD Detector Specifications
Specification Ventana 532 Ventana 785 Ventana 785L Ventana Vis/NIR
Detector Hamamatsu S11510-10 06 Bac k-thinned NIR-enhanced CCD Hamamatsu
S10420-1006 Backthinned CCD
Detector
active area
(mm)
Pixel format 1024 x 64
Pixel size 14 µm square
Well depth 300 KeRead noise 6 e- RMS
Dynamic
range
CCD QE 78% peak, 60% average in Raman 75% peak
CCD Cooling None
14.336 x 0.896
17000:1 (Typical)
°C
15
None
Ventana Spectrometer Specifications
Specification Ventana 532 Ventana 785 Ventana 785L Ventana VIS/NIR
Dimensions
(LxWxH)
Weight 0.9kg (2 lb)
Temperature
Operation
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170 mm (6.7 in.) x
110 mm (4.3 in.) x
50 mm (1.9 in.)
0 to 50
°C (noncondensing)
125 mm (4.9 in.) x
110 mm (4.3 in.) x
50 mm (1.9 in.)
127 mm (5 in.) x
158.75 mm (6.25
in.) x 50.8 mm (2
in.)
Spectrometer:1.2kg
(2.6 lb)
Power Supply:
0.5kg (1.10 lb)
5 to 45
(noncondensing)
°C
170 mm (6.7 in.) x
110 mm (4.3 in.) x
50 (1.9 in.)
0.9kg (2 lb)
0 to 50°C
(noncondensing)
Ventana Data Sheet
Specification Ventana 532 Ventana 785 Ventana 785L Ventana VIS/NIR
Power 12 VDC
Gratings
Diffraction
efficiency
1600 lpmm HD
VPG
85% peak at 610
nm
1625 lpmm HD VPG
83% average for S&P
450 lpmm at CWL
580 nm
65% average for
S&P
Optical input SMA 905
Slit Size 50 µm
Fiber
diameter
Resolution
(FWHM) cm
Resolution
(FWHM) nm
-1
-1
20 cm
10 cm
0.6 nm 0.7 nm
Optimized for 600µm, NA = 0.39 fiber input
-1@
810 nm N/A
@
810 nm 4.0 nm
f/# 1.3 2.0
Signal-to-
noise ratio
Integration
time
~550:1 (Typical)
22 ms – 4 min
Wavelength
Range
533 – 690 nm 800 – 940 nm 800 – 940 nm 430 – 1100 nm
Interface USB 2.0 (no external accessory connector access)
Ventana 785L Laser Specifications
Specification Value
Wavelength 785 nm
Working Distance 21.95 mm
Image Spot Size 10 mm
Sample Spot Size 75 mm
Laser type Single-mode laser diode stabilized with VBG
Laser control Enable/disable
Laser power stability < 1% after 30 seconds from being enabled
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Ventana Data Sheet
Mechanical Diagrams
Ventana 532-Raman
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Ventana Data Sheet
Ventana 785-Raman
Ventana Spectrometer Detector
The Ventana contains a Hamamatsu S11510-1106 two-dimensional CCD. The Ventana electronics
only support reading out the device as a 1-D array (e.g., all rows are summed together on chip). The
structure of the Ventana spectrometer Hamamatsu CCD is shown below. The device has 2048 x 64
active pixels and a total of 2068 x 70 pixels.
Pixel Definition
The following is a description of all of the pixels:
Ventana Pixels
Pixel Description
0 Unusable
1–3 Dark
4–9 Bevels/unusable
10–2057 Spectrum
2058–2063 Bevels/unusable
2064–2067 Dark
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