Detailed LRF0105C Specifications
The technical material below is retained for this model only. Do not transfer a range, pulse, interface, mechanical or safety value from another 1535 nm product.
TECHNICAL SPECIFICATIONS
| Project | Performance Indicators |
| Model | LRF0105C |
| Laser Wavelength | 1535±5nm |
| Eye- safety | Class Ⅰ |
| Divergence Angle | ≤1mrad |
| Laser Energy | ≥100 μJ |
| Launch Lens Diameter | Φ8 mm |
| Receiver Lens Diameter | Φ20 mm |
| Measuring Range
（Reflectance 30%; visibility ≥ 5km.） |
≥ 4000m @60% Reflectivity, Building Target ≥3000m @30% Reflectivity, 2.3×2.3m Target ≥1500m @30% Reflectivity, 0.5×1.7m Target ≥800m @30% Reflectivity, 0.2×0.3m Target |
| Minimum Range | ≤15 m |
| Ranging Frequency | Single, 1Hz, 5Hz, 10Hz |
| Number of multi-target detections | Up to 3 targets |
| Ranging Accuracy | ±2 m |
| Range Resolution | ≤0.1 m |
| Precision Rate | ≥98% |
| False Alarm Rate | ≤1% |
| Pin-in-lead package model | FWF08002-S06B13W5M |
| Supply Voltage | DC3～5 V |
| Standby power consumption | ≤1mW |
| Average power consumption | ≤0.8W |
| Peak Power Consumption | ≤1.5W |
| Weight | ≤29±1 g |
| Dimension (L×W×H) | Φ34mm×47.5mm |
| Operating Temperature | -40～+70 ℃ |
| Storage Temperature | -55～+75 ℃ |
| Impact Resistance | Meet the MIL-STD-810G testing standard |
| Vibration Resistance | Meet the MIL-STD-810G testing standard |
OUTLINE DIMENSION
PIN interface
- a) Power supply voltage: 3~5V;
The host computer realizes cross-linking test with the rangefinder through a 6PIN connector (FWF08002-S06B13W5M (Teska connector)). The pin definition of the communication port on the rangefinder is shown in the table.
Product electrical pin definition
| Pin | Identification number | Definition of electrical characteristics | Cable color | |
| P-1 | COM | Input power negative pole | Power supply | |
| P-2 | VIN+ | Input power positive pole | ||
| P-3 | - | (Empty) | ||
| P-4 | TTL_TXD | Signal output port | From rangefinder to host computer | |
| P-5 | TTL_RXD | Signal input port | From host computer to rangefinder | |
| P-6 | POWER_CTL | Low power control port | ＞0.7V to turn on, ＜0.15V to turn off | |
Connector connection 1 pin position
Model-specific conditions and limits
Conditions are retained only when the source states them. They are not reconstructed from a nominal range or wavelength.
Read the controlled model table for its stated target, reflectance, visibility, temperature, rate and acceptance conditions. No additional condition has been inferred for this model.
Pulsed Time-of-Flight Ranging
A pulsed rangefinder estimates one-way distance from the round-trip delay of an accepted optical return. The equation is general engineering context, not an additional LRF0105C specification.
Pulse energy describes emitted energy per pulse; its effect cannot be separated from pulse width, divergence, optical losses, receiver threshold and the stated target/atmosphere conditions. It is not a substitute for a model-specific near- or long-range acceptance test.
Source-stated application context
Application labels indicate evaluation context, not automatic fitness for a finished system.
Product Description
LRF0105C 1535nm Mini Eye-Safe Laser Rangefinder Module for Embedded UAV, Handheld and Smart Sensor Platforms
The LRF0105C is a compact 1535nm eye-safe laser rangefinder module designed for integration into UAV gimbals, handheld optics, robotic sensors and other embedded systems that require precise distance measurement with minimal size and power. Based on ERDI’s self-developed erbium-glass laser, it is classified as Class 1 eye-safe and uses a single-pulse TOF (Time of Flight) method to calculate target distance.
With a typical pulse energy of ≥100µJ, divergence ≤1mrad and optimized transmit / receive apertures (Φ8mm launch, Φ20mm receive), the LRF0105C can measure NATO targets (2.3m×2.3m) out to ≥3000m and human-sized targets (0.5m×1.7m) to ≥1500m under 30% reflectance and ≥5km visibility. Minimum range is ≤15m, and the module supports single-shot ranging plus 1Hz, 5Hz and 10Hz continuous modes, with up to three simultaneous targets and range accuracy of ±2m, resolution ≤0.1m and a valid hit rate ≥98% with false alarm rate ≤1%.
The module runs from a DC 3–5V supply with typical standby power ≤1mW, average power ≤0.8W and peak power ≤1.5W, making it suitable for battery-powered UAV payloads, handheld monoculars, smart binoculars and low-power edge devices. The cylindrical form factor (Φ34mm × 47.5mm, ≤29g) allows direct mounting inside small gimbal cameras, compact EO sensors and constrained enclosures where volume and weight are critical.
Communication with the host system is via a 3.3V TTL serial interface, using a 6-pin FWF08002-S06B13W5M connector with dedicated pins for power, TX/RX and low-power control. The module supports multiple baud rates (115200bps factory default, 57600bps, 9600bps) and a structured packet protocol, including device self-test, single and continuous ranging, first/last/multi-target mode, frequency configuration, gate (min/max distance) settings and counters for total shots and per-power-on shots. This makes it easy to embed the LRF0105C into UAV flight computers, handheld controllers, robot navigation units and industrial control PCs.
Environmentally, the LRF0105C meets MIL-STD-810G shock and vibration requirements, with an operating temperature range of −40 to +70°C and storage from −55 to +75°C, supporting deployment on airborne, vehicle-mounted and outdoor fixed platforms. Typical applications include small UAV gimbal payloads for altitude and obstacle sensing, vehicle and turret EO/IR heads, handheld laser rangefinder monoculars and binoculars, industrial machine-vision systems, perimeter surveillance sensors and smart robots requiring compact, eye-safe distance measurement.
For front-end protection, an external optical window with AR coating optimized for 1525–1545nm and ≥99% transmittance is recommended, optionally combined with hydrophobic or hard coatings depending on the environment. The window thickness should be kept within 2–4mm, with sufficient mechanical margin between effective aperture and outer diameter, and the emission axis aligned within 2°–4° to the window normal; the air gap between window and antenna should be minimized to reduce loss. These integration guidelines allow designers to build sealed, ruggedized optics without sacrificing ranging performance.
Combining high ranging performance, low power, robust environmental design and a rich TTL command set, the LRF0105C provides a ready-to-integrate 1535nm eye-safe ranging core for next-generation UAV payloads, soldier-borne devices, industrial sensors and autonomous systems where precise distance data and human eye safety must be guaranteed at the same time.
Confirm short- and long-distance acceptance conditions
- Define minimum distance, target material, reflectance, size and incidence angle.
- Check receiver recovery, optical-axis overlap and strong-return handling at the intended near limit.
- Verify supply tolerance, peak current, grounding, interface levels, connector and timing with the ordered revision.
- For long-distance acceptance, state target geometry, visibility, weather, background and required detection probability.
- Test with the installed window, boresight, field of view, enclosure and thermal path rather than a bare module alone.
- Evaluate accessible emission, labels and failure conditions again for the finished laser product under IEC 60825-1.
Questions to resolve before design release
Does a stated maximum range apply to every target?
No. A stated range must be read with its target and environmental conditions. Dark, small, oblique, wet or partially obscured targets and degraded visibility can reduce received signal.
Does 1535 nm itself establish the laser classification?
No. Classification concerns accessible emission from the finished laser product. The module statement and final instrument assessment are distinct.
Can a long-range claim be used as the minimum range?
No. Minimum-distance behaviour depends on the particular transmit/receive geometry, receiver timing and strong-return management documented for the model and host system.
Product evidence and general technical context
The model PDF controls model claims. Public references below explain general engineering principles only.
- ERDI LRF0105C model PDFModel-specific technical evidence.
- System Design of a Pulsed Laser RangefinderOptical Engineering 30(3), 1991 - link budget, background, noise, detection and range error.
- The Short-Range, High-Accuracy Compact Pulsed Laser Ranging SystemSensors 22(6), 2146, 2022 - pulsed-ToF equation, timing error, reflectivity and temperature effects.
- Laser system range calculations and the Lambert W functionApplied Optics 48(4), B1-B7, 2009 - range performance versus atmospheric transmission, target and system parameters, and threshold SNR; its 1.06 µm example is general context, not ERDI model data.
- Monostatic all-fiber rangefinder systemApplied Optics 54(25), 7687-7694, 2015 - a measured case study of shared-aperture geometry and receiver-recovery loss; it does not establish an ERDI model limit.
- Light Transmission in Fog: The Influence of Wavelength on the Extinction CoefficientApplied Sciences 9(14), 2843, 2019 - measured and modeled wavelength-dependent fog attenuation.
- IEC 60825-1:2014Laser-product classification and accessible-emission requirements; final equipment requires system-level assessment.
- Practical application of pulsed “eye-safe” microchip laser to laser rangefindersOpto-Electronics Review 21(3), 2013 - a peer-reviewed 1535 nm rangefinder implementation; use for general transmitter/receiver and atmospheric-design context, not model specifications.