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LRF1830C 18–23km 1535nm Eye-Safe TOF Laser Rangefinder Module for Coastal, Border and Long-Range EO/IR Integration

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Product Model:LRF1830C

The LRF1830C is a 1535nm Class I eye-safe TOF laser rangefinder module that measures 50–18000 m for 3×3 m vehicle targets and up to 23000 m for 6×6 m diffuse targets with ±2 m accuracy, ≤0.3 mrad divergence and up to three targets at 0.5–10 Hz. Powered from 12 V with ≤2 W average power in a 125×100×70 mm, ≤400 g pin-in-lead housing and offering selectable TTL or RS-422 interfaces, it is ideal for coastal and border surveillance, long-range EO/IR systems and strategic observation platforms.

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Senior Engineer, Yilin

Tel : +86 28 81076698

WhatsApp : +86 18000520222

ERDI Pre-Sales Notice & Customer Information

(Please Read Before Purchase or Inquiry) Thank you for your interest in ERDI TECH LTD. We are committed to providing customers worldwide with high-precision, high-reliability laser products and technical solutions. Before placing an order, please read the following information carefully to better understand our company, services, and purchasing policies.

  • About ERDI​

     ERDI is a professional manufacturer specializing in the research, development, and production of laser modules, laser measurement systems, and related optoelectronic components.
    We integrate design, R&D, production, and sales, with a focus on safety, innovation, and precision.

    Our products are widely used in:

    • Industrial measurement and alignment systems
    • Scientific research and educational applications
    • Optical instrumentation and laser testing
    • Consumer and OEM laser solutions

    ERDI operates certified facilities and maintains rigorous quality control to ensure that every product meets international standards.

  • Global Presence and Trade Reliability​

    ERDI has established official stores on leading global platforms including Amazon, Alibaba International Station, and Made-in-China.com, allowing customers worldwide to purchase safely and conveniently. We are a verified and trusted factory, not a reseller, and we ensure that all transactions, quotations, and logistics follow transparent and secure trade practices.
  • Sample and Lead Time​

    To help customers evaluate our products and performance, we offer sample orders for most product categories.

    • Standard samplesare typically delivered within one week after order confirmation.
    • Customized modulesmay require additional processing time depending on design complexity and optical requirements.
      Our logistics team will provide real-time tracking and documentation for every shipment.
  • OEM / ODM / OBM Services​

     ERDI supports full-range customization including:

    • OEM (Original Equipment Manufacturing)– Products manufactured under your brand or part number.
    • ODM (Original Design Manufacturing)– Custom optical or mechanical design based on your specifications.
    • OBM (Original Brand Manufacturing)– Private-label solutions with our in-house R&D and branding support.

    We provide technical co-development, logo engraving, packaging customization, and batch production services to meet both small-scale and mass-production requirements.

  • Technical Support and Service System​

    ERDI maintains technical service centers and distribution partners worldwide, enabling rapid customer response.
    We provide:

    • Comprehensive technical consultation and project evaluation
    • One-on-one on-site technical assistanceat the customer’s facility when required
    • Lifetime after-sales supportand technical maintenance guidance

    Each laser product is delivered with a full set of user documentation, including Laser Module Usage Precautions and Safety Guidelines.

  • Quality Assurance and Warranty​

    ERDI implements strict multi-stage quality control throughout production:

    • Incoming material inspection
    • Optical alignment verification
    • Output power and wavelength calibration
    • Safety and durability testing under standard conditions

    We guarantee that all products leaving our factory meet design and performance specifications.
    Except for man-made damage, we will replace any defective unit within one year free of charge and provide lifetime maintenance support thereafter.

    For more details, please refer to our After-Sales Service & Warranty Policy.

  • Important Safety Reminder

    Before using any ERDI laser product:

    • Carefully read and follow the Laser Module Usage Precautions.
    • Always use appropriate laser protective eyewear.
    • Operate only in controlled environmentsunder trained personnel supervision.
      Failure to observe safety instructions may result in injury or equipment damage.
  • Communication and Order Confirmation​

    To ensure efficient service, please confirm the following before placing an order:

    • Product model, wavelength, output power, and working voltage/current
    • Whether you require custom mechanical dimensions, optical configurations, or driver circuitry.
    • Packaging, labeling, and shipping preferences.
    • Any specific export or compliance documentation needed for your country.

    Our sales engineers will provide an official quotation and delivery schedule upon confirmation of all specifications.

  • Final Statement​

    ERDI upholds the values of safety, integrity, and precision. We sincerely welcome customers from all over the world to visit our facilities, discuss cooperation, and experience our advanced laser technologies firsthand. Your satisfaction and trust are our highest pursuit.

After-Sales Service & Warranty Policy

We strive to provide high-quality laser modules and excellent customer service. Please read the following terms carefully to understand your rights and our responsibilities.

  • Product Origin and Quality Assurance​

    • All ERDI products are manufactured directly by the factory, ensuring consistent quality and full traceability.
    • We provide a diverse rangeof laser modules and laser distance measurement modules to suit various industrial, educational, and research applications.
    • Every product is tested and inspectedbefore shipment to guarantee that it meets specification standards.
  • Return and Exchange Policy​

    • Customers may request a return or exchange within 30 daysof receiving the goods, provided that:
    • The product remains in original condition, unused, and without affecting secondary sales.
    • A valid reason for return or exchangeis provided.
    • Upon approval, we will replace or refund according to our service policy.
    • The buyer is responsible for shipping costsassociated with returns, exchanges, or repairs, based on international freight cost rules.
  • Warranty Coverage​

    • The main functional componentsof ERDI laser products are covered by a 2-year warranty from the date of purchase, excluding cosmetic appearance.
    • Within the first 12 months, if a verified manufacturing defect occurs, we will replace the item with a brand-new productfree of charge.
    • Replacement of cosmetic or housing components (e.g., enclosure, labeling, or exterior parts) may incur a reasonable cost feebased on material expenses.
    • Warranty does not cover:
    • Damage due to misuse, improper installation, or modification.
    • Operation outside the recommended power supply or temperature range.
    • Accidental or physical damage, including drops, fire, or liquid ingress.
  • Receiving Inspection​

    • Upon delivery, please inspect the parcel immediately in the presence of the courier.
    • If there is any quantity discrepancy, visible damage, or mismatch, do not signthe delivery receipt.
    • Once the package is signed for (by you, family, or colleagues), it is considered accepted as correct and complete.
  • Customer Support

    For technical assistance, warranty claims, or safety inquiries, please contact our official service team through the contact information listed on erdicn.com.
    Our support engineers will provide professional guidance on installation, alignment, safety, and maintenance procedures.

Laser Module Usage Precautions

(Important – Buyers Must Read Before Use)

Operating laser modules involves potential optical and thermal hazards. To ensure safe and proper use, please read the following precautions carefully before powering on your laser product.

  • General Safety Warnings​

    • Invisible Radiation Warning– Some laser modules emit infrared (IR) or ultraviolet (UV) radiation that is invisible to the human eye. Never assume the laser is malfunctioning simply because you cannot see the beam. Always confirm that the power is disconnected before inspecting the module.
    • Do Not Look Directly into the Laser Aperture– Even when wearing certified laser safety goggles, never stare directly into or near the beam exit of a working laser module.
    • Avoid Reflected Beams from High-Power Lasers– Reflection from Class IV lasers (output power > 500 mW) can cause severe and permanent eye damage. Always wear wavelength-specific safety goggles when operating or aligning high-power laser systems.
    • Keep Away from Flammable Materials– Do not place flammable or explosive items (such as paper, cloth, leather, or plastics) in the laser path. Black or dark-colored materials absorb laser energy more easily and may ignite. (Exception: controlled material-burning experiments with proper fire protection.)
    • Avoid Direct Human Exposure– Class IIIa or higher lasers (≥ 5 mW) can burn skin or eyes. Never point a laser beam at any part of a person’s body.
    • Restrict Access to Trained Personnel Only – Keep all laser devices out of reach of untrained individuals, children, and pets.
  • Optical Path and Reflection Safety​

    • Never Aim Toward Glass Surfaces– Ordinary glass reflects roughly 4 % of incident light, which can redirect dangerous laser radiation into your eyes. Avoid operating lasers in front of mirrors or reflective windows.
    • Working Plane Awareness– When setting up an experimental platform, note the laser emission height. Do not position your head or eyes near this level during operation. Lenses and mirrors may reflect or refract light unexpectedly. Always align optical components downward or horizontally—never angle a beam upward.
    • Remove Reflective Accessories– Watches, jewelry, and other shiny objects can reflect laser light unpredictably. Remove them before use.
    • Infrared Beam Detection– IR lasers (wavelength > 800 nm) are almost completely invisible. Use a beam-viewing card, IR detector, or up-conversion screen to visualize the beam path safely.
    • Visual Brightness Misjudgment– Some wavelengths (below 430 nm or above 700 nm) appear much dimmer than their actual power output. Do not rely on visual brightness to judge beam intensity.
    • Pulsed Laser Caution– Pulsed lasers can have extremely high peak power even at modest average power levels. Verify that all optical elements and samples in your experiment exceed the laser’s damage threshold before exposure.
    • Prohibited Uses– It is strictly forbidden to point laser beams at moving vehicles, aircraft, or any area where light could distract or endanger others.
    • End-of-Beam Safety Stop– Always place a black anodized or matte metal plate at the end of your optical path to absorb residual energy and prevent laser leakage into surrounding areas.

    Low-Power Modules – ERDI laser modules rated below 1 mW are considered eye-safe under normal operating conditions and can be used without hazard when handled properly.

  • Recommended Protective Measures​

    • Protective Eyewear– Always wear certified laser safety goggles designed for the specific wavelength and power level of your module.
    • Appropriate Clothing– Light-colored or white long-sleeved clothing reduces the risk of heat absorption or ignition if stray laser light contacts the fabric.
    • UV Laser Protection– For ultraviolet lasers, apply broad-spectrum sunscreen (SPF 30 or higher) to exposed skin areas to minimize UV radiation effects.
    • Environmental Safety– Operate lasers in a controlled laboratory or industrial environment with minimal reflective surfaces. Ensure that all personnel nearby are informed of ongoing laser use and have received proper training.

TECHNICAL SPECIFICATIONS

Project Performance Indicators
Model LRF1830C
Laser Wavelength 1.54μm±0.02μm
Eye- safety Class Ⅰ
Divergence Angle ≤0.3 mrad
Laser Energy ≥500 μJ
Launch Lens Diameter Φ18 mm
Receiver Lens Diameter Φ60 mm
Measuring Range

(Reflectance 30%; visibility ≥ 18 km.)

4m×6m Objective ≥18 km
Minimum Range ≤50 m
Ranging Frequency 0.5Hz ~10Hz
Number of multi-target detections RS422
Ranging Accuracy ±2 m
Range Resolution ≤0.1 m
Precision Rate ≥98%
False Alarm Rate ≤1%
Pin-in-lead package model J30J
Supply Voltage DC12 V
Standby power consumption ≤1.2W
Average power consumption ≤2 W
Peak Power Consumption ≤3W
Weight ≤400g
Dimension (L×W×H) 125mm×100mm×70mm
Operating Temperature -40~+70 ℃
Storage Temperature -55~+75 ℃
Impact Resistance Meet the MIL-STD-810G testing standard

OUTLINE DIMENSION(mm)

125mm×100mm×70mm

PIN INTERFACE

Selectable between TTL (Molex 51021-0500) / RS-422 (J30J)

1 Electrical connector model: Molex51021-0500. The detailed definition of the electrical interface is as follows:

Table 1 Interface definition

External plug-in XS3

Model:Molex51021-0500

Remark

1

TTL RX

3.3V

2

TTL TX

3.3V

3

CTRL

3.3V-5V power on, 0V power off

4

+12V

Power supply+

5

GND

Power supply-

2. Electrical connector model: J30J; The corresponding plug and cable shall be provided by Party B. The detailed definition of the electrical interface is shown in the following table:

Interface Definition

Pin

Definition

Function

Remarks

1

GND

Serial Port Ground

 

2

GND

12V Input Negative

 

3

GND

12V Input Negative

 

4

VCC 5V

12V Input Positive

 

5

VCC 5V

12V Input Positive

 

6

RS422 RX+

Serial Port Receive +

From the upper computer to the rangefinder

7

RS422 RX-

Serial Port Receive -

From the upper computer to the rangefinder

8

RS422 TX-

Serial Port Transmit -

From the rangefinder to the upper computer

9

RS422 TX+

Serial Port Transmit +

From the rangefinder to the upper computer

Product Description

LRF1830C 18–23km 1535nm Eye-Safe TOF Laser Rangefinder Module for Coastal, Border and Long-Range EO/IR Integration

The LRF1830C is a long-range laser rangefinder module based on a 1535nm eye-safe glass laser independently developed by ERDI. It uses a single-pulse TOF (time-of-flight) ranging method and is built as an OEM core for coastal and border surveillance, long-range EO/IR systems, vehicle and ship turrets, and fixed observation posts that require 18–23km-class performance with a straightforward RS422/TTL interface.

The module operates at a 1.54µm±0.02µm wavelength, Class I eye-safe, with a divergence angle of ≤0.3mrad, single-pulse energy of ≥500µJ, a Φ18mm launch lens and a Φ60mm receiver lens. Under 30% reflectance and line-of-sight conditions, the LRF1830C achieves a vehicle target (3m×3m) ranging distance of ≥18,000m when visibility is not less than 26km and humidity not greater than 50% at 30°C. For a diffuse target (6m×6m, reflectance ≥30%), at visibility not less than 30km and humidity not greater than 50% at 30°C, the module reaches ≥23,000m. The minimum range is ≤50m, ranging accuracy is ±2m, range resolution ≤0.1m, precision rate ≥98% and false alarm rate ≤1%, giving designers authoritative long-range performance figures for demanding surveillance and targeting roles.

The LRF1830C supports a ranging frequency from 0.5Hz to 10Hz, with both single-shot and continuous-ranging modes. Multi-target detection allows up to three targets per shot, reported from near to far. In both single and continuous ranging, the rangefinder returns three distance values (0.1m resolution) plus a status flag byte. The flag indicates main-wave and return-wave presence, laser status, timeout condition, APD status and whether fore and aft targets exist, enabling first/last target logic and robust filtering in complex coastal, mountainous or urban scenes.

Electrically, the module is powered by a DC 12V supply. Standby power consumption is ≤1.2W, average power ≤2W and peak power ≤3W, giving an efficient profile for mast, tower, vehicle and shipborne installations. A pin-in-lead J30J package provides an RS-422 differential interface with RX+/RX− and TX+/TX− lines and redundant 12V input pins, while an external Molex 51021-0500 connector offers a TTL (3.3V) interface with RX, TX, CTRL (3.3–5V power on, 0V power off), +12V and GND. This dual-interface approach gives integrators flexibility to use short TTL wiring inside compact EO heads or RS422 links over longer cables in noisy environments.

The communication protocol uses a master–slave format at 115200bps, 8 data bits, one start bit, one stop bit and no parity. Command frames consist of a 0x55 start flag (STX0), command word (CMD), data length (LEN), parameter bytes (DATAH/DATAL) and an XOR checksum (CHK). Available commands include standby (continuous ranging stop), single ranging, continuous ranging (with the period in milliseconds), self-test, distance selection and nearest distance (blind-zone) setting, cumulative shot-count query, APD power on/off and serial-number query. Response frames provide self-test data such as APD temperature, APD high voltage and internal ±5V voltages, blind-zone value, total shot counts and the three target distances with the associated flag byte.

Mechanically, the LRF1830C is housed in a 125mm×100mm×70mm pin-in-lead module with a weight of ≤400g. It is specified for an operating temperature range of −40 to +70°C, storage from −55 to +75°C, and meets MIL-STD-810G impact and vibration requirements. This makes the module suitable for long-term deployment on border and coastal towers, armored vehicles, naval platforms and fixed EO/IR stations exposed to harsh climatic and mechanical conditions.

For installations with an external optical window—such as sealed coastal domes, long-range camera housings or integrated EO/IR heads—the optical window should be coated with an anti-reflective (AR) coating optimized for 1525–1545nm with transmittance ≥99%. Depending on the environment, hydrophobic or hard coatings may be added, with overall transmittance maintained at ≥97%. The effective aperture and outer diameter must follow the recommended geometry (window effective aperture at least 2mm smaller than the outer diameter, and the antenna clearance ≥1.5mm), window thickness typically kept within 2–4mm, emission axis aligned within 2–4° of the window normal and the air gap minimised to reduce absorption and back-reflection.

In practical use, a 1535nm ultra-long-range module like the LRF1830C is well suited for coastal and border surveillance networks, long-range EO/IR and thermal-imaging systems, vehicle and naval observation posts, over-the-horizon cueing sensors and industrial measurement installations that demand 18–23km-class range, Class I eye safety and a reliable RS422/TTL serial interface in a rugged mechanical design.

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