Intel RealSense D405 Depth Camera for Close‑Range High‑Precision 3D Scanning

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The Intel RealSense D405 is a palm‑size close‑range depth camera built on the D401 stereo module and Vision Processor D4 v4. Where other RealSense cameras prioritise mid‑ to long‑r ange depth, the D405 is engineered for one mission: ultra‑precise 3D perception at 7–50 cm. With a Min‑Z of just 7 cm and sub‑millimetre accuracy, it detects features down to the 0.1 mm level — a capability no other RealSense camera can match at this form factor. It captures depth at 1280 × 720 / 90 fps through a global‑shutter stereo pair and colours the point cloud using an on‑module ISP that derives RGB from the left depth imager, eliminating the need for a separate colour sensor and keeping the body ultra‑compact. The D405 draws ~1.55 W from USB, weighs only ~60 g, and is powered by the open‑source librealsense SDK 2.0 with full ROS / ROS 2 support. Features 7 cm Min‑Z — Ultra‑Close Depth Capture — Starts detecting depth at just 7 cm (vs ~28 cm on D435 / ~52 cm on D455), enabling machine‑vision workflows that no other RealSense camera can perform without specialised optics. Sub‑Millimetre Accuracy — Depth error < 2% at 50 cm; individual feature detection down to 0.1 mm at the 7 cm working distance — ideal for precision inspection, component placement, and quality‑control tasks. Optimised for 7–50 cm Range — The D401 stereo module is specifically calibrated for close‑range operation, delivering the highest depth quality precisely where other RealSense cameras are weakest. No Dedicated RGB Sensor — RGB colour is synthesised from the left depth imager via on‑module ISP, perfectly co‑registered with depth (no extrinsic calibration drift) and enabling a much smaller and lighter housing. 87° × 58° Depth FOV — Wide field of view at close range gives generous spatial coverage for desktop and work‑cell capture volumes without sacrificing resolution. Global Shutter on Both Depth and Colour — Eliminates motion blur and rolling‑shutter artefacts when capturing moving parts on assembly lines or during robot‑arm pick‑and‑place cycles. 1280 × 720 @ 90 fps Depth — High‑resolution, high‑frame‑rate depth streams keep up with fast automation cycles and deliver dense, low‑noise point clouds. Compact & Lightweight — At 42 × 42 × 23 mm and ~60 g, the D405 is the smallest and lightest RealSense camera — easy to integrate into space‑constrained robot end‑effectors, handheld devices, or compact enclosures. Low Power — ~1.55 W typical (depth + IR) with a 35 mW standby mode, suitable for battery‑powered or thermally sensitive embedded deployments. Dual Mounting Threads — 1/4‑20 UNC tripod thread plus 2× M3 screw holes for direct robot‑frame, arm‑end, or fixture mounting. Vision Processor D4 v4 — On‑board ASIC handles all stereo matching and ISP processing, offloading the host CPU and reducing USB bandwidth requirements. Open SDK & ROS Support — Cross‑platform librealsense 2.0 (Python, C++, C#, Java, MATLAB) and realsense‑ros / realsense2‑ros packages for rapid prototyping and production deployment. Specifications Parameter Specification Depth Technology Active Stereo Vision (D401 Module) Image Sensor Type Global Shutter (depth + colour from left imager) Min‑Z (Min Depth Distance) 7 cm at 640 × 480 resolution Ideal Depth Range 7 cm – 50 cm Depth Accuracy < 2% at 50 cm; feature detection down to 0.1 mm at 7 cm Depth FOV 87° × 58° Depth Resolution / Max FPS 1280 × 720 @ 90 fps; 848 × 480 @ 90 fps; 640 × 480 @ 90 fps Stereo Baseline 50 mm RGB Sensor None (derived from left depth imager via ISP) RGB Resolution / FPS 1280 × 720 @ 90 fps (default); 1920 × 1080 @ 30 fps RGB FOV 87° × 58° (aligned to depth) Vision Processor Intel RealSense Vision Processor D4 Board v4 IMU None Power Supply USB 2.0 / USB 3.1; ~1.55 W typical; 35 mW standby Connectivity USB‑C / USB‑A cable (data + bus power) Dimensions 42 mm × 42 mm × 23 mm Weight ~60 g (body only) Operating Temperature 0°C – 35°C (ambient); 0°C – 55°C (housing) Mounting 1× 1/4‑20 UNC tripod thread + 2× M3 screw holes Module Variant D401 (available as bare module for high‑volume OEM integration) Reference Documents Intel RealSense D405 — Official Specifications Intel RealSense D401 — Depth Module Specifications librealsense SDK 2.0 — GitHub Repository Application Precision Robotics & Pick‑and‑Place — 7 cm Min‑Z and 0.1 mm feature detection enable reliable bin‑picking, component placement, and micro‑assembly with SCARA or delta robots operating in tight workspaces. Inline Quality Inspection & Defect Detection — Sub‑millimetre depth resolution catches surface defects, dimensional variances, and assembly faults on production‑line parts at close range with no additional optics. Medical & Healthcare — Non‑contact wound measurement, surgical‑tool tracking, and 3D wound‑bed modelling for healing‑progress monitoring; global shutter handles movement without distortion. Agricultural Harvesting — Close‑range, sub‑millimetre fruit and vegetable detection for robotic picking heads on fragile produce that requires gentle, precise gripper alignment. PCB & Electronics Inspection — Inspect solder joints, component placement, and trace integrity at 7–50 cm working distance — the exact range of most bench‑top optical inspection stations. Handheld 3D Scanning — Compact 60 g body and wide FOV at close range are ideal for handheld portable scanners capturing fine surface details on objects held in the operator's hand. AR / VR Near‑Field Interaction — Hand‑tracking, object‑placement, and desk‑scale spatial mapping benefit from the D405's close‑range depth accuracy and perfectly aligned colour from the left imager ISP. OEM / Embedded Integration — The D401 bare module version enables high‑volume OEM embedding; the compact 42 mm camera is small enough for drone landing pads, endoscopic companions, or lab‑automation platforms. Packing List Description Quantity Intel RealSense D405 Depth Camera × 1 USB-Cable × 1 FAQ 1. How does the D405 differ from the D435 and D455 series? The D405 uses the dedicated D401 short‑range stereo module with a 7 cm Min‑Z (vs ~28 cm on D435 and ~52 cm on D455). It is engineered for close‑range precision tasks at 7–50 cm with accuracy down to 0.1 mm. By contrast, the D435 and D455 are optimised for mid‑ to long‑range (0.3 m – 10 m) applications. Additionally, the D405 has no independent RGB sensor — colour is derived from the left depth imager via an on‑module ISP — which keeps it ultra‑compact at 42 mm × 42 mm × 23 mm. 2. What does "Min‑Z of 7 cm" mean in practice? Min‑Z is the closest distance at which the camera can produce valid depth data. The D405 starts outputting accurate depth at 7 cm from the lens surface at 640 × 480 resolution. This is critical for desktop inspection, end‑effector‑mounted robotics, and any scenario where the camera must be very close to the target surface or object. 3. How does the D405 produce RGB without a dedicated colour sensor? The D405 uses the left stereo depth imager combined with an on‑module Image Signal Processor (ISP) that colourises the monochrome depth image. Because both colour and depth originate from the same sensor, they are perfectly intrinsically aligned — there is no extrinsic calibration drift between depth and colour streams, which is a structural advantage over cameras with separate RGB sensors. 4. Does the D405 work outdoors? The D405 can be used in outdoor environments with caution. Like all RealSense active‑stereo cameras, direct sunlight can saturate the IR projector and degrade depth quality. For outdoor short‑range tasks, shading the camera improves results. If your primary environment is outdoors with strong ambient light, consider a LiDAR‑based solution like the Intel RealSense L515 for sunlight immunity. 5. Can the D405 be used with ROS or ROS 2? Yes. The official realsense‑ros and realsense2‑ros packages expose depth, colour, and point‑cloud topics as standard ROS messages. Ubuntu 18.04 / 20.04 / 22.04 are officially supported. Python examples and pre‑built Docker images are also available for rapid prototyping without a native Linux install. 6. What is the power consumption of the D405? The D405 draws ~1.55 W during active depth and colour streaming and drops to 35 mW in standby. This is the lowest power draw in the RealSense camera family, making the D405 well suited for battery‑powered, thermally constrained, or embedded robot deployments where heat dissipation is a concern. 7. Is the D405 available as a bare module for OEM integration? Yes. The underlying Intel RealSense D401 Depth Module is available separately for high‑volume OEM customers who want to embed the stereo optics and ISP into their own enclosures or products. Volume pricing and integration support are handled through Intel's sales channel — contact OpenELAB for D401 module availability and lead times. 8. Can multiple D405 cameras be used simultaneously without interference? Yes. Multiple D405 units can operate in the same space without mutual interference from their IR projectors, unlike some structured‑light cameras. This makes the D405 suitable for multi‑camera rigs for 360° coverage, volumetric capture, or stereo‑pair augmentation in desktop‑scale work cells. 9. Does the D405 support hardware synchronisation? The D405 supports software synchronisation (timestamp matching through librealsense). For precise hardware‑sync use cases, consider the D455 series which includes a dedicated sync cable header for frame‑synchronised multi‑camera setups. 10. What frame rates and resolutions are available for depth and colour? The D405 outputs depth at 1280 × 720 @ 90 fps (primary), 848 × 480 @ 90 fps, and 640 × 480 @ 90 fps. Colour (from ISP) is available at 1280 × 720 @ 90 fps or 1920 × 1080 @ 30 fps. Both depth and colour share the same 87° × 58° global‑shutter FOV, ensuring pixel‑accurate colour mapping across the entire depth field. Show more