ERDI 905 nm Laser Rangefinder Module Solution

Eye-Safe | High-Precision | Compact DToF/ToF Architecture for UAVs, Vehicles, Robotics & Industrial Sensing

ERDI 905 nm Laser Rangefinder Module
Semiconductor short-pulse, eye-safe Class 1 ranging from handheld and UAV payloads to vehicle and robotic platforms.

• Class 1 eye-safe (IEC 60825-1) 905 ± 10 nm emission for safe field deployment.

• Long-range, high accuracy: up to 1.2–2.0+ km with ±1 m class precision (model-dependent). 

• Ultra-compact SWaP: modules as small as Ø 23 × 40 mm, ≤ 18 g for drones/robots.

• Fast digital pipeline (MCU + ADC + FPGA), UART-TTL/RS-422 integration, and PC test software.

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The ERDI 905 nm Laser Rangefinder Module is a semiconductor, short-pulse distance sensor built for Direct Time-of-Flight (DToF/ToF) measurement. It combines a high-peak 905 nm transmitter, precision receiver optics, and a digital timing chain to deliver meter-class accuracy from 5 m to beyond 1–2 km, depending on the variant and target reflectivity. Its eye-safe Class 1 emission and lightweight, ruggedized packaging make it ideal for UAV gimbals, mobile robots, vehicle turrets, handheld instruments, EO/IR pods, and industrial automation.

Short-Pulse 905 nm Semiconductor Emitter

ERDI’s 905 nm LRFs use high-efficiency semiconductor diodes to generate nanosecond pulses for ToF. The 905 ± 10 nm band supports Class 1 eye safety and strong detector compatibility, enabling high SNR and low power. 

A hybrid MCU+ADC+FPGA architecture captures the return pulse, performs real-time filtering and timing discrimination, and outputs stable distance results over UART-TTL (3.3 V) (and RS-422 on some models). ERDI provides PC configuration/test software and a standard command set, accelerating OEM integration. 

Low-divergence transmit optics and a matched receiver FOV increase detection probability while suppressing background light. Typical divergence/FOV examples (3 × 6 mrad TX, ~8 mrad RX) deliver ≥98 % in-range detection on suitable targets. (Representative spec: 905 nm 2000 m module.)

ERDI’s 905 nm LRFs use high-efficiency semiconductor diodes to generate nanosecond pulses for ToF. The 905 ± 5 nm band supports Class 1 eye safety and strong detector compatibility, enabling high SNR and low power. 

Values vary by variant. Consult model datasheets for guaranteed limits.

Sources: compact 18 g module 10–1200 m ±1 m; 1200A/1500 m ToF module with UART-TTL & PC tool; 2000 m Class 1 module with detailed optical/electrical metrics.

• Variant selection — choose compact UAV/robot module, 1200/1500 class, or 2000 m class based on range and SWaP.

• Mechanical/thermal design — secure line-of-sight, provide conduction path to chassis; protect from moisture/dust.

• Optical alignment — collimate TX, verify divergence; align RX FOV; conduct boresight with host camera/gimbal where applicable.

• Electrical interface — connect UART-TTL (3.3 V) or RS-422; implement command protocol; enable single/continuous modes. 

• Software bring-up — use ERDI PC config/test software to set baud rate, acquisition windows, averaging, and data framing. 

• Calibration & verification — validate ±1 m accuracy, multi-target behavior (if enabled), and detection probability under operational distances; confirm spec such as ≥98 % within conditions. 

• EMC & environment — verify operation across the stated temperature range and under platform vibration.

• UAV / UGV / Robotics — altitude hold, terrain following, obstacle ranging, SLAM aiding, and target cueing in EO/IR gimbals where ≤ 18 g SWaP is decisive. 

• Vehicle turrets / RCWS / EO-sights — ballistic ranging and target hand-off with meter-class accuracy at tactical distances.

• Industrial automation / surveying — conveyor profiling, stockpile monitoring, cranes, and site mapping via ToF integration with PLC/IPC.

• Security / perimeter / traffic — object detection, gate control, and trigger sensing with eye-safe emission.

• Eye-Safe by Design — 905 nm Class 1 enables safer training and operation around people and assets. 

• Proven Long-Range in Small Packages — 1.2 km–2.0 km performance with ±1 m class accuracy, even on compact modules. 

• Fast Time-to-Integrate — UART-TTL/RS-422, standard command set, and PC tool shorten OEM schedules. 

• Vertical Manufacturing — ERDI’s R&D-to-production control boosts repeatability and delivery confidence.

• Laser Class: Class 1 (IEC 60825-1) 905 nm; follow safe-use practices; avoid direct exposure at close range while operating. 

• EMC/Environmental: Qualified for field conditions; see model datasheets for operating temperature and shock/vibration.