IEC 60825-1 Classification
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Hazard Distance (NOHD) vs Cutoff
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/ 30.0 cm ToF Guard
7 mm pupil MPE limit: 25.46 W/m² (0.98 mW)
Truck Cab Eye Clearance (@ 2m)
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Above 2.60 m bus/truck driver eye height
Prototype Mass & Runtime
8.9 hrs
• 210 g total
Shoulder pod + 21700 chest battery pack
1. Optical & Posture Parameters
Peak Diode Optical Power
20.0 mW
Modulation Duty Cycle (8 Hz Pulse)
50%
Powell Lens Fan Angle (Fore-Aft Spread)
30°
Beam Center Elevation Angle (Above Horiz.)
65°
ToF Proximity Cutoff Guard Distance
30 cm
IEC 60825-1 Pupil & Irradiance Readout
At r = 10 cm (Standard Eval):—
At ToF Cutoff Boundary:—
At r = 300 m (Aircraft CFZ):—
Road Sightline & Overhead "AeroFin" Geometry
Live elevation cone, ToF proximity shield, and truck/car driver sightlines
Atmospheric Side-Scatter Visibility Across Weather Conditions
| Condition | Sheet Luminance | Sky Contrast | Est. Detection Range | Conspicuity Assessment |
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2. Interactive 3D Shoulder Pod CAD (LSJ-POD-REV1)
Drag on the 3D viewport to rotate • Color-coded subsystems with 18 mm medial glare baffle, sloped hydrophobic window, and dual Powell fan ports
Acromion Saddle (68×44 mm)
IP65 Pod Body
18 mm Medial Glare Baffle (+Y)
520 nm Forward Fan (+X)
638 nm Rear Fan (-X)
VL53L4CD ToF Guard
Parametric OpenSCAD Source (
cad/shoulder_pod.scad)Loading CAD script...
3A. Electronics Schematic & Triple-AND Safety Gate
Stored in /home/nixos/laser-safety-jacket/electronics/SCHEMATIC_AND_NETLIST.md
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3B. Real-Time Safety Interlock Firmware (C++)
Stored in /home/nixos/laser-safety-jacket/firmware/lsj_safety_controller.cpp
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4. Laser Eye Safety Failure Mode & Effects Analysis (FMEA)
Single-fault tolerance verification per IEC 60825-1 & ISO 13849-1 • Stored in docs/FMEA.json
| ID | Subsystem | Failure Mode | Potential Hazard / Effect | S × O × D = RPN | Hardware & Optical Mitigation |
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5A. System Requirements Specification (SRS v1.0)
Stored in docs/SRS.md
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5B. Foundational Architecture Trade-Offs
Stored in docs/ARCHITECTURE_TRADEOFFS.md
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6. Prototype Bill of Materials (BOM) & Power/Mass Budget
Stored in /home/nixos/laser-safety-jacket/docs/BOM.json
| ID | Category | Part Number | Engineering Description | Qty | Mass (g) | Avg Power (mW) | Ext. Cost |
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