OptiTrack-Slim 3U
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Product Overview
OptiTrack-Slim 3U
The Slim 3U is a board level camera designed for OEM integration in computer vision, multi-touch screens/surfaces, and custom tracking applications. It is fully customizable, with a variety of optional components and features. Software support includes the free Camera SDK, which provides complete control and access to camera settings.
A curved multi-touch screen
Six Slim 3U cameras were used in making the Reality Touch Theatre at the University of Groningen.
Fast, precise, and efficient capture
The Slim 3U is capable of capturing fast moving objects with its global shutter imager and 120 FPS capture speed. By maximizing its 640 × 480 VGA resolution through advanced image processing algorithms, the Slim 3U can also track objects down to sub-millimeter movements with repeatable accuracy.
Components a la carte
Build your SLIM piece by piece, optimizing it as you see fit. Custom building your camera gives you the flexibility to create a hardware solution that is tailored for your own application, satisfies your unique spec, and maximizes cost-efficiency. Optional components include:
• Aluminum case with CS lens mount and 1/4"-20 tripod thread
• Filter options (800nm pass filter, Filter Switcher, empty filter plug)
• Lens mount adapter (CS to M12, CS to C—only available with SLIM case)
• M12 lens (3.5mm, 4.5mm, 5.5mm)
• Input/output (Sync break-out cable, Micro 9-pin connector)
Camera control
With OptiTrack’s Camera SDK you can access a variety of Slim 3U settings for greater control over what your cameras capture and what information they report to the software application. Available settings include:
• Image processing type
• Frame rate
• Exposure
• Threshold
• Filter switching
• And more...
On-camera image processing
In addition to providing raw and MJPEG grayscale video, SLIM cameras can process and threshold data on-board, creating a variety of video modes deliverable to your PC, including:
• Precision grayscale - Most precise object detection. Sends grayscale object information to the PC for calculation of location, size, and roundness using our most precise processing methods.Provides greater accuracy than other modes, but consumes more CPU resources and USB bandwidth.
• Segment - Balanced object detection. Similar to Precision Grayscale, Segment processing streamlines object information for more CPU-efficient marker detection. Provides a balance between precision and USB bandwidth use.
• Object - The most CPU-efficient object detection. Provides more efficient USB bandwidth utilization, but delivers less information to the PC than other modes.
• MJPEG-compressed grayscale - Full resolution grayscale frames, compressed on-camera for highly scalable scene video capabilities.
Raw grayscale - Full resolution, uncompressed grayscale.
MJPEG compression
Transmit MJPEG-compressed grayscale video at full frame rate and full resolution with 1/10th of the USB bandwidth of uncompressed video. MJPEG compression enables multiple cameras to stream video to the same PC, offering scalability superior to raw grayscale video.
Camera Synchronization
Up to 24 SLIM cameras per PC can synchronize their shutters to expose at exactly the same time. Each synced camera can operate in different video modes with individually customized camera settings. Utilize OptiHubs in your sync chain to enable external syncing capabilities.
Filter Switcher technology
Upgrade any Slim 3U camera with the same Filter Switcher technology found in Flex 3 cameras, enabling visible spectrum video in addition to standard IR imaging. FS-enabled cameras are equipped with a solenoid that can be controlled in-software to extend or retract the infrared lens filter. OptiTrack's user-changeable, polychromatic M12 lenses are specially designed to remain in focus in both the visible and infrared spectrums.
OEM integration
Incorporate Slim 3U cameras into OEM tracking or computer vision applications via the free Camera SDK.
Compare Cameras
| Prime 41 | Prime 17W | Prime 13 | Prime 13W | Prime Color | |
| Resolution | 2048 × 2048 | 1664 × 1088 | 1280 × 1024 | 1920 × 1080 | |
| Frame Rate | 180 FPS | 360 FPS | 240 FPS | 250 FPS | |
| Latency | 5.5 ms | 2.8 ms | 4.2 ms | n/a | |
| Filter Switcher1 | No | No | Included | Optional | |
| Bundled Software | n/a | ||||
| Finger Tracking | Yes | No | Yes | ||
| Single-device Multi-camera Tracking | No | ||||
| Maximum Units Per Workstation | 96+ | 8 | |||
| Maximum Range3 Using 5/8 inch markers | 100 feet4 30.5 meters | 50 feet 15.2 meters | 40 feet 12.2 meters | 20 feet 6.1 meters | n/a |
| Stock Lens Horizontal FOV | 51° | 70° | 56° | 82° | ? |
| Stock Lens Vertical FOV | 51° | 49° | 46° | 70° | ? |
| Optional Lenses Horizontal FOV | n/a | n/a | 42° | n/a | ? |
| Optional Lenses Vertical FOV | n/a | n/a | 34° | n/a | ? |
| Interface | GigE/PoE+ | GigE/PoE | |||
| Synchronization Method | Network | Wired | |||
| Image Processing Modes | Raw Grayscale, Segment, Object, and MJPEG10, 11, 12 | n/a | |||
| Number of LEDs | 170 | 20 (UHP)13 | 62 | 10 (UHP)13 | n/a |
| LED Strobe Mode | Yes | n/a | |||
| LED Intensity Control | Yes | n/a | |||
| Shutter Type | Global | ||||
| Electronic Exposure Control | Yes | ||||
| Frame Rate Control | Yes | ||||
| Camera Body | Aluminum & Polycarbonate | ||||
| Standard Tripod Mount -20 Thread | Yes | ||||
| Slim 13E | Flex 13 | Flex 3 | Slim 3U | V120:Trio | V120:Duo | |
| Resolution | 1280 × 1024 | 640 × 480 | 640 × 480 (×3) | 640 × 480 (×2) | ||
| Frame Rate | 240 FPS | 120 FPS | 100 FPS | 120 FPS | ||
| Latency | 4.2 ms | 8.3 ms | 10 ms | 8.3 ms | ||
| Filter Switcher1 | Included | Optional | Included2 | No | ||
| Bundled Software | n/a | Motive:Tracker? (Perpetual License) | ||||
| Finger Tracking | Yes | No | ||||
| Single-device Multi-camera Tracking | No | Yes | ||||
| Maximum Units Per Workstation | 96+ | 24 | 1 | |||
| Maximum Range3 Using 5/8 inch markers | 40 feet 12.2 meters | 40 feet5 12.2 meters | 36 feet5 11 meters | n/a | ||
| Stock Lens Horizontal FOV | 56° | 56° | 46° | n/a | 47°?6 | 47°?6 |
| Stock Lens Vertical FOV | 46° | 46° | 35° | n/a | 43° | 43° |
| Optional Lenses Horizontal FOV | 42° | 42° | 38°, 58° | 38°, 46°, 58°, Other7 | n/a | n/a |
| Optional Lenses Vertical FOV | 34° | 34° | 29°, 45° | 29°, 35°, 45°, Other7 | n/a | n/a |
| Interface | GigE/PoE | USB 2.0 | ||||
| Synchronization Method | Network | OptiSync | Wired and OptiSync | Wired8 | n/a9 | n/a9 |
| Image Processing Modes | Raw Grayscale, Segment, Object, and MJPEG10, 11, 12 | Precision Grayscale, Raw Grayscale, Segment, Object, and MJPEG | Precision Grayscale, Segment, and MJPEG | |||
| Number of LEDs | n/a | 28 | 26 | n/a | 26 (×3) | 26 (×2) |
| LED Strobe Mode | n/a | Yes | n/a | Yes | ||
| LED Intensity Control | n/a | Yes | n/a | Yes | ||
| Shutter Type | Global | |||||
| Electronic Exposure Control | Yes | |||||
| Frame Rate Control | Yes | |||||
| Camera Body | Aluminum & Polycarbonate | Aluminum | Aluminum14 | Aluminum | ||
| Standard Tripod Mount -20 Thread | Yes | Yes14 | Yes | |||
1. Allows cameras to switch between infrared and visible light for scene video.
2. Center imager only.
3. Distance at which a marker is visible as a single pixel.
4. Using Maximum Power for IR strobe, which requires a PoE+ Ethernet switch.
5. Using High Power strobe mode, which requires an OptiHub.
6. Horizontal FOV is based on the overlapping of cameras.
7. Also accepts third-party CS/C/M12 lenses.
8. Requires using the optional V120 Sync Break-Out Cable.
9. Hardware sync between multiple V120:Duo and V120:Trio devices is not supported.
10. Prime 41 MJPEG is downsampled to 1/16 resolution (512 × 512).
11. Prime 17W MJPEG is downsampled to 1/4 resolution (832 × 544), frame rate is adjustable from 30 FPS to 350 FPS.
12. Prime 13 and Prime 13W MJPEG is downsampled to 1/4 resolution (640 × 512)
13. Ultra high power LEDs (UHP).
14. With purchase of optional V120:SLIM case.
