21MP 4.5μm Pixels, 300-1000nm High Speed Camera

| Features |
|---|
| Equipped with GSPRINT4521 CMOS image sensor |
| Ultra-high resolution of 5120×4096 (21MP) |
| Maximum frame rate up to 733 fps |
| Global shutter eliminates motion distortion and smearing |
| Dual interface design: USB3.0 + CXP |
| Multiple data bit depths: 8/10/12-bit |
| Large 1024 MB (8 Gb) image buffer |
| Supports ROI, Binning, trigger control and other functions |
| CE/FCC certified, multi-platform SDK provided |
The SDK supports development languages such as C/C++, C #/VB.net, Python, Java, etc,
Third-party support including LabVIEW, MATLAB, Micro-Manager, DirectShow, and TWAIN.
| Item | Specification |
|---|---|
| Model | VIS0421CUCXP, VIS0421MUCXP |
| Sensor Type | GSPRINT4521 |
| Spectral Range | 300nm–1000nm |
| Pixel Size | 4.5μm × 4.5μm |
| Sensor Format | 1.86″ |
| Frame Rate & Resolution | 190 fps @ 5120×4096; 733 fps @ 2560×2016 |
| Memory | 1024MB (8Gb) |
| Conversion Gain | 0.5 e⁻/ADU @ 12-bit |
| Dynamic Range | 65dB (12-bit) |
| Read Noise | 6.1 e⁻ (12-bit), 3.5 e⁻ (12-bit) |
| Full Well Capacity | 32k e⁻ @ 12-bit, 120k e⁻ (Binned) |
| SNR | 43dB (12-bit) |
| Sensitivity | -86dB |
| Dark Current | 11.4 e⁻/s/pixel @ 50℃ |
| QE | 62.8% @ 520nm |
| Exposure Time Range | 4μs ~ 10s |
| Gain Range | 1.0x, 2.0x, 4.0x |
| Shutter Mode | Global Shutter |
| Binning | Software: 2×2, 3×3, 4×4; Hardware FPGA: 2×2 |
| Data Interface | USB 3.0 / CXP |
| Digital I/O | 1 optical-coupling isolated input, 1 optical-coupling isolated output, 2 non-isolated input and output |
| Data Bit Depth | 8-bit / 10-bit / 12-bit |
| Cooling Temperature | -20℃ (at ambient temperature 20℃) |
| Optical Interface | TBD |
| Power Supply | 19V 4A power adapter |
| Power Consumption | < 25W |
| Dimensions | 110mm × 110mm × 126.4mm |
| Weight | TBD |
| Software | AttosView; SDK development kit; CLView software for Delsa frame grabbers |
| Operating System | Windows / Linux |
| Temperature | Operating: -30℃ ~ 60℃; Storage: -40℃ ~ 80℃ |
| Humidity | 20%–80% RH, non-condensing |
| Certifications | CE, FCC |
| Table1: USB port, GigE port, CL port refrigerated camera pin signal definitions | |||||
![]() |
Color | Pin | Signal | Description of the signal | |
| White | 1 | GDN | Direct-coupled signal ground | ||
| Red | 2 | 12V | 12VDC power input | ||
| Blue | 3 | OPTO_GND | Opto-isolated signal ground | ||
| Yellow | 4 | DIR_GPIO0 | Direct-coupled General Purpose I/O (Software configurable input/output) (line2) | ||
| Black | 5 | DIR_GPIO1 | Direct-coupled General Purpose I/O (Software configurable input/output) (line3) | ||
| Green | 6 | OPTO_IN | Opto-isolated input signal (line0) | ||
| Pink | 7 | OPTO_OUT | Opto-isolated output signal (line1) | ||


The electrical characteristics of the opto-isolated output (external voltage 5V, external resistor 1K) are shown in Table 2.
| Table 2: Opto-isolated output signal’s electrical characteristics | ||
| Parameter name | Parameter notation | Parameter value |
| Output logic low | VL | 742mV |
| Output logic high | VH | 4.134V |
| Output rise time | TR | 4us |
| Output fall time | TF | 1.8us |
| Output rise delay | TDR | 12us |
| Output fall delay | TDF | 2us |
The output of the corresponding output current and VL when using different voltages and resistors in externalcircuit are shown in Table 3.
| Table 3:Opto-isolated output logic’s low levels parameters | |||
| External voltage | External resistor | VL | Output current |
| 3.3V | 1KΩ | 510mV | 2.82mA |
| 5V | 1KΩ | 742mV | 4.31mA |
| 12V | 2.4KΩ | 795mV | 4.68mA |
| 24V | 4.7KΩ | 850mV | 4.97mA |
1. Line2/line3 is set as input pin
Logic 0 input level: 0~0.6VDC (DIR_GPIO0/DIR_GPIO1 pins)
Logic 1 input level: 2.0~24VDC (DIR_GPIO0/DIR_GPIO1 pins)
Maximum input current: 25mA
When the input level is between 0.6V and 2.0V, the circuit action state is uncertain, please avoid the input voltage range working in this range.
To prevent damage to the GPIO pins, please connect the pin GND first, and then input voltage to the Line2 pin.
Input rise delay (TDR): 0.02us
Input fall delay (TDF): 0.02us
2. Line2/line3 are set as output pins
The maximum current allowed through this pin is 25mA.
The external pull-up voltage is 5V, the pull-up resistor is 1KΩ, and the GPIO is configured to output the logic level and electrical characteristics as shown in Figure 4.


When the ambient temperature is 25 degrees Celsius, the relationship between the external voltage, resistance and low-level voltage output is shown in Table 4.
| Table 4:Non-isolated output Logic’s low level parameters | ||
| External voltage | External resistor | VL(GPIO) |
| 3.3V | 1KΩ | 0.11V |
| 5V | 1KΩ | 0.167V |
| 12V | 2.4KΩ | 0.184V |
| 24V | 4.7KΩ | 0.385V |
| Table 5: Non-isolated output electrical characteristics | ||
| Parameter name | Parameter notation | Parameter value |
| Output rise time | TR | 0.08us |
| output fall time | TF | 0.02us |
| Output rise delay | TDR | 0.1us |
| Output fall delay | TDF | 0.04u |
ascamsdk support a variety of APIs, including: Native C/C++,.NET/C#/VB.NET, Python, Java, DirectShow, Twain, LabView, Matlab, etc. Compared with other APIs, Native C/C++ API as a low-level API is characterized by using pure C/C++ development without relying on other runtime libraries. The interface is simple and the control is flexible.
AttosTek provides extensive third-party software support for its UV-Vis cameras and SWIR cameras, facilitating rapid integration and use in various development environments. This includes SDK and demo programs for LabVIEW and MATLAB, as well as DirectShow drivers, Micromanager, and TWAIN SDK drivers. These features enable seamless compatibility with mainstream development environments and third-party software, greatly simplifying the workflow for system integration and secondary development.
|
AttosView Recommended System Requirements |
|
|
Operating System |
Microsoft® Windows® XP / Vista / 7 / 8 /10 /11(32 & 64 bit), Mac OSX, Linux |
|
Processor (CPU) |
≥3.0 GHz Intel Core i5 or Higher |
|
Memory (RAM) |
≥8 GB |
|
Hard Drive |
NVMe Solid State Drive (SSD) |
|
Graphics Card |
Dedicated Adapter with ≥256 MB RAM |
|
Motherboard |
USB 3.0 (-USB) Cameras: Integrated Intel USB 3.0 Controller or One Unused One Unused PCle3.0*16 Slot |
|
Connectivity |
Internet Connectivity for Driver Installation |

Q1: What are the core industry advantages of the 21 MP (5120 × 4096) global shutter imaging sensor?
This series of cameras features a 4.5 µm small pixel size combined with a 1.86-inch large sensor format, enabling an ultra-wide field of view in a single frame while resolving micron-scale defects and particle textures with full clarity. The global shutter across all models eliminates motion artifacts in high-speed scenes. The 300–1000 nm spectral range covers UV, visible, and near-infrared bands, addressing both surface color variations and sub-surface defects in silicon substrates. The –20°C cooling accommodates long-exposure low-light imaging, and the dual-interface design supports both benchtop setups and long-cable automated systems. At full resolution, the camera delivers 190 fps, and up to 733 fps in ROI mode, balancing wide-field coverage with ultra-high-speed throughput. The 1 GB onboard buffer ensures no frame loss during long-duration sequences, making it suitable for 24/7 production line operation and overnight fluid experiments.
Q2: Which application scenarios are suitable for the color (VIS0421CUCXP) and monochrome (VIS0421MUCXP) models, respectively?
This series is available in both color and monochrome models:
-
VIS0421CUCXP (color): Equipped with the GSPRINT4521-AVC color sensor, it meets the requirements of inspection tasks that demand high color fidelity—such as color accuracy verification in display pixel lighting inspection and color consistency analysis in print quality inspection.
-
VIS0421MUCXP (monochrome): Featuring the GSPRINT4521-AVM monochrome sensor, it is optimized for sensitivity and dynamic range, providing ideal monochrome image quality for high-speed precision inspection and scientific imaging.
Selection recommendation: If your application requires extracting critical information from color—such as display color inspection or print color verification—choose the color model. If your experiment demands the highest sensitivity (e.g., low-light imaging or fluorescence detection) or requires precise morphological measurements, the monochrome model is the better choice.
-
Q3: What are the SDK calling methods for external triggering and batch dark-field correction?
-
Hardware external trigger: The SDK allows custom trigger delay and the number of consecutive frames to be acquired, enabling microsecond-level timing synchronization with pulsed lasers or production line encoders, and precise pairing of fluid particles.
-
Dark-field correction: Attostek pre-stores multiple sets of dark frames in the camera’s hardware buffer. The SDK provides a one-click loading function to eliminate fixed-pattern noise in long-exposure images.
-
21MP CMOS high-speed camera, available in monochrome or color.
VIS0421CUCXP
21MP Color CMOS Camera with 4.5µm Pixel, Global Shutter, USB 3.0 & CXP Interface
VIS0421MUCXP
21MP Monochrome CMOS Camera with 4.5µm Pixel, Global Shutter, USB 3.0 & CXP Interface
Optional accessories – lenses
AttosView offers an optional YLGD series continuous zoom optical system for visible light cameras, designed specifically for high-precision imaging scenarios. The YLGD series continuous zoom optical system series provides multiple focal length options and is suitable for various professional applications such as security surveillance, industrial vision inspection, and scientific observation, ensuring excellent image clarity, operational flexibility, and environmental adaptability. For inquiries, please contact sales@attostek.com







