169Alvium USB Cameras User Guide V4.6.1
Specifications
Alvium 1800 U-812 UV
NOTICE
Sensor aging by UV radiation
The sensor in this camera model is dedicated for imaging in the UV spectrum.
However, UV radiation causes aging, which is permanently increasing the dark
current and decreasing the QE (quantum efficiency).
To reduce sensor aging, we recommend you to:
• Minimize the intensity of UV radiation.
• Avoid wavelengths below 250 nm. For example, consider the use of bandpass
filters to block shorter wavelengths.
Feature Specification
1800 U-812 (monochrome)
Sensor model Sony IMX487
Resolution 2848 (H) × 2848 (V); 8.1 MP
Sensor type CMOS
Shutter type Global shutter (GS)
Sensor size Type 2/3; 7.8 mm × 7.8 mm; 11 mm diagonal
Pixel size 2.74 µm × 2.74 µm
CRA 0 deg
Sensor bit depth (ADC) 12-bit
Monochrome pixel formats Mono8 (default), Mono10, Mono10p, Mono12, Mono12p
Maximum frame rate 51 fps (at 450 MByte/s)
Exposure time 9 µs to 10 s (450 MByte/s)
Exposure modes Timed, TriggerControlled, TriggerWidth
Gain 0 dB to 48 dB; 0.1 dB increments
Digital binning Horizontal: 1 to 8 columns; Vertical: 1 to 8 rows
Sensor binning (H × V) 2 × 2 (Sum) Not applicable
Multiple ROI (H × V) Free | Tile | Horizontal: 1 × 1 to 1 × 4 | Vertical: 1 × 1 to 4 × 1
Image buffer (RAM) 256 KByte
Non-volatile memory (Flash) 1024 KByte
GPIOs
4 programmable GPIOs
As direct inputs (push-pull): 0 to 5.5 VDC
As direct outputs (push-pull): 0 to 3.3 VDC at 12 mA
Power requirements Power over USB; External power
Power consumption
(typical, at 5 VDC)
USB power: 3.9 W
External power: 4.1 W
Table 74: Alvium 1800 U-812 UV specifications (sheet 1 of 2)
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