The AvaSpec-256 Fiber Optic Spectrometer is based on the AvaBench-45 symmetrical Czerny-Turner design with 256 pixel CMOS Detector Array. The spectrometer has a fiber optic entrance connector (standard SMA, others possible), collimating and focusing mirror and diffractional grating. A choice of 13 different gratings with different dispersion and blaze angles enable applications in the 200-1100nm range. The AvaSpec-256 can be delivered with 2 platforms of electronics; either with USB1.1 with 14 bit AD converter or the new USB2.0 interface with 16 bit AD converter.
The AvaSpec-256 is specially suitable for low noise applications. Digital IO ports enable external triggering and control of shutter and pulsed light sources from the Avantes line of instruments.
The AvaSpec-256 is also available as dual channel or multiple channel instrument (up to 8 channels), where all spectra are taken simultaneously.
The AvaSpec-256 comes with AvaSoft-basic, a complete manual, USB interface cable and a PS-12V/1.0A power supply. AvaSoft-full and application software can be ordered separately. Alternatively the AvaSpec-256-SPU has a switch to run on USB power or external power.
The new AvaSpec-USB2 has a USB2 interface with ultrafast datasampling of 1500 spectra per second (with on board averaging) and datatransfer in 1.5msec and supports analog in-and outputs as well. Optional Bluetooth® (-BT) communication and an SD card for on-board saving of spectra can be added. The AvaSpec-256-USB2 runs on USB power and comes with AvaSoft-basic, a complete manual and USB interface cable. Multiple (up to 127) USB2 spectrometers with different detector types can be externally coupled (see section multi-channel spectrometers).
Technical Data
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Spectrometer platform
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AvaSpec-256
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AvaSpec-256-USB2
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Optical Bench
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Symmetrical Czerny-Turner, 45 mm focal length
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Wavelength range
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200-1100 nm
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Resolution
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0.4 -64 nm, depending on configuration (see table)
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Stray light
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< 0.2%
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Sensitivity (AvaLight-HAL, 8 µm fiber) in counts/µW per ms integration time
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30 (14-bit AD)
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120 (16-bit AD)
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Detector
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CMOS linear array, 256 pixels
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Signal/Noise
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2000:1
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AD converter
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14 bit, 330 kHz
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16 bit, 500 kHz
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Integration time
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1 msec - 60 seconds
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0.6 msec - 10 minutes
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Interface
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USB 1.1, 12 Mbps
RS-232, 115.200 bps
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USB 2.0 high speed, 480 Mbps
RS-232, 115.200 bps
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Sample speed with on-board averaging
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4 msec / scan
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0.6 msec /scan
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Data transfer speed
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7-9 ms / scan (depending on # pixels transferred)
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1.5 ms / scan
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Digital IO
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DB-15 connector, 2 Digital in, 12 Digital out
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HD-26 connector, 2 Analog in, 2 Analog out, 3 Digital in, 12 Digital out, trigger, sync.
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Power supply
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12 VDC, reverse polarity protection, 160 mA (PS-12V/1.0A) or 5VDC USB power
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Default USB power, 350 mA
Or with SPU2 external 12VDC, 350 mA
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Dimensions, weight
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175 x 110 x 44 mm (1 channel), 716 grams
175 x 165 x 85 mm (2 channel), 1.700 grams
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175 x 110 x 44 mm(1 channel), 716 grams
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Grating selection table for AvaSpec-256
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Useable range
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Spectral range (nm)
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Lines/mm
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Blaze (nm)
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Order code
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UV/VIS/NIR
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200-1100*
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900*
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122
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UV
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UZ
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UV/VIS/NIR
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200-1100
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400
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300
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300
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UA
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UV/VIS
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200-850
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200
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600
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300
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UB
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UV
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200-750
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100
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1200
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250
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UC
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UV/VIS
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250-850
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200
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600
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400
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BB
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VIS/NIR
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300-1100*
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800*
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150
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500
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VZ
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VIS/NIR
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300-1100
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400
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300
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500
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VA
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VIS
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360-1000
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200
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600
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500
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VB
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VIS
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300-800
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100
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1200
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500
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VC
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NIR
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500-1050
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200
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600
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750
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NB
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NIR
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500-1050
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100
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1200
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750
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NC
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NIR
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600-1100
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400
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300
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1000
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IA
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NIR
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600-1100
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200
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600
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1000
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IB
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* please note that not all 256 pixels will be used for the useable range
Resolution table (FWHM) for AvaSpec-256
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Slit size (µm)
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Grating (lines/mm)
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25
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50
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100
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200
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500
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122
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5.5
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7.9
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15.7
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32.0
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79.0
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150
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4.5
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6.4
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12.8
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26.0
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64.0
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300
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2.5
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3.2
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6.4
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13.0
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32.0
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600
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1.0
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1.5
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3.0
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6.0
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16.0
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1200
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0.5
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0.8
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1.5
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3.0
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8.0
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Ordering Information
| AvaSpec-256 |
Fiber Optic Spectrometer, 45 mm Avabench, 256 pixel CMOS detector, USB1.1/RS-232 interface, incl AvaSoft-Basic, USB interface cable and a PS-12V/1.0A power supply, specify grating, wavelength range and options |
| AvaSpec-256-USB2 |
Fiber Optic Spectrometer, 45 mm Avabench, 256 pixel CMOS detector, USB powered high speed USB2 interface, incl AvaSoft-Basic, USB interface cable, specify grating, wavelength range and options |
| AvaSpec-256-2 |
Dual Channel Fiber Optic Spectrometer, 2 * 45 mm Avabench, 256 pixel CMOS detector, USB1.1/RS-232 interface, incl AvaSoft-Basic, USB interface cable and a PS-12V/1.0A power supply, for both channels specify grating, wavelength range and options |
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| Options |
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| -SPU |
incl. switch for self powered USB1 or external power for RS232 |
| -SPU2 |
incl. switch for self powered USB2 or external power for RS232 |
| -SPU2-BT |
Bluetooth interface for USB2 platform only, including antenna and switch |
| SDXXX |
Internal XXX MB SD card for on board data saving, for USB2 platform only |
| SLIT-XX |
Slit size, please specify XX = 25, 50, 100, 200, 500 µm |
| OSF-YYY |
Order sorting filter for 2nd order effects filtering, please specify YY= 385, 475, 515, 550, 600 nm |
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