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ERDI LDR80K1 1064nm High-Power Laser Target Designator – 80mJ Long-Distance Target Marking System

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Product Model:LDR80K1

The LDR80K1 is an 80 mJ, 1064 nm laser target designator/rangefinder module optimized for airborne platforms and precision-guided artillery applications. It offers ≥ 10 km ranging with ≤ 5 m accuracy and ≥ 98% probability of correct ranging, plus 20 pps coded laser designation with flexible short and long illumination cycles. With ≤ 0.30 mrad beam divergence, compact 116 × 52 × 96 mm dimensions, ≤ 680 g weight, 18–32 V DC input, ≤ 80 W average power, RS-422 digital control and full vibration/shock qualification, the LDR80K1 is well suited for integration into UAV payloads, EO/IR pods and vehicle-mounted fire-control systems operating in harsh environments.

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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

Operating modes

Ranging and laser designation

Pump source

Laser diode array

Operating wavelength

1.064 μm

Average energy per designation cycle

Average single-pulse energy per designation cycle ≥ 80 mJ

Pulse energy fluctuation

Within one designation cycle, the single-pulse energy variation shall not exceed 10% of the average energy (over the full temperature range, with statistics taken 2 s after laser emission starts).

Beam divergence

≤ 0.30 mrad

Pulse width

15 ns ± 5 ns

Optical axis parallelism error

Parallelism error between the optical axis and the mounting reference: ≤ 0.5 mrad.

Ranging performance

  • Minimum measuring distance: ≤ 300 m
  • Maximum measuring distance: ≥ 10 km(for a 2.3 m × 2.3 m target with diffuse reflectance ≥ 0.2, visibility ≥ 23 km, and relative humidity ≤ 70%)
  • Ranging rates: 1 Hz, 5 Hz, single-shot
  • Ranging accuracy: ≤ 5 m
  • Probability of correct ranging: ≥ 98%
  • Continuous ranging operating time: 5 min(At 5 Hz: continuous operation for 5 min, rest time ≤ 3 min, then ranging can be continued.)

Laser designation performance

  • Nominal designation repetition rate (for verification): 20 pps
  • Short designation mode: each cycle has 17 s of designation time and 30 s interval; up to 8 consecutive cycles
  • Long designation mode: each cycle has 60 s of designation time and 45 s interval; up to 4 consecutive cycles
  • After completing one long and one short designation cycle, the interval before the next designation shall be within 30 minutes.

Laser coding

  • Meets the weapon system coding requirements and provides user-programmable code expansion capability.
  • Supports external synchronization input; the external signal can control the laser emission pattern for coding.
  • Coding method: precise frequency code (eight groups of pre-stored period-code patterns).
  • Coding accuracy: ≤ 2.5 μs.

Dimensions

≤ 116 mm × 52 mm × 96 mm

Weight

≤ 680 g

Electrical characteristics

  • Input voltage: DC 18 V to 32 V
  • The electrical and electronic components inside the laser rangefinder/designator are compatible with the system power characteristics.
  • Average power: ≤ 80 W; peak power: ≤ 120 W
  • After PCB design and debugging are completed, all circuit boards are coated with conformal coating to provide moisture, salt-spray and fungus protection.

External power input requirements

  • When sharing the same power supply with motor or other inductive loads, the laser rangefinder/designator should use a soft-start (3–5 s). At the instant of sudden power-on, the induced voltage generated by motors and other inductive loads at the module input may be several times the nominal input voltage, which can cause over-voltage damage.
  • During power-up, it is recommended to use the dedicated power-on control function of the laser rangefinder/designator to stagger its power-on time from other loads. After other loads have powered up and stabilized, then enable power to the rangefinder/designator.
  • The power input of the laser rangefinder/designator should be isolated from other inductive loads. If conditions allow, a DC filter (30 V / 10 A) can be added at the module’s power input.
  • The power supply for the laser rangefinder/designator shall satisfy the peak power demand. When testing the module alone, with a DC supply voltage of 24 V, the supply current should be greater than 6 A. If the output voltage is lower, the rated output current of the supply should be increased accordingly.

Temperature Requirements

High-Temperature Requirements

  • Operating temperature: ≤ +55 °C
  • Storage temperature: ≤ +65 °C

Low-Temperature Requirements

  • Operating temperature: ≥ −40 °C
  • Storage temperature: ≥ −45 °C

Vibration Requirements

The equipment shall withstand flight-induced vibration and shocks occurring during takeoff and landing. All components shall also meet the environmental conditions of vehicle transport.

Vibration spectrum:

  • From 15 Hz to 33 Hz, constant-displacement sinusoidal vibration with amplitude 0.91 mm;
  • From 33 Hz to 700 Hz, constant-acceleration sinusoidal vibration with amplitude 2 g.

Duration: 1 hour per axis in three orthogonal directions (X, Y, Z).

Test conditions:
The product shall be mounted on the vibration platform in its normal operating configuration and powered on during testing.
After vibration testing, the equipment shall operate normally.

Shock Requirements

  • Vertical axis: ≥ 10 g
  • Lateral axis: ≥ 10 g
  • Longitudinal axis: ≥ 10 g
  • Shock waveform: post-peak sawtooth, duration 11 ms; applied along X, Y, and Z axes, both directions on each axis, 18 shocks in total.
  • Test conditions:
    The product shall be mounted on the shock test platform in its normal operating configuration and powered on during testing.
    After shock testing, the equipment shall operate normally.

OUTLINE DIMENSION(mm)

PIN INTERFACE

Electrical Interface

Electrical Interface

  • One full-duplex RS-422 interface; signal levels and drive capability comply with the RS-422 interface standard.

  • One I/O interface (for controlling the laser rangefinder / designator power on/off).

  • One external synchronization control signal.

Interface definition:

  1. The cable outlet direction of the connector is parallel to the length direction (rearward cable exit).
    Connector model on the laser rangefinder side: J30J-15ZKP;
    Mating plug model on the electro-optical system side: J30J-15TJL (WL150A4).

Table  — Electrical Interface Definition

Pin No.

Signal Definition

Input/Output

Description

Remarks

1. 

+28V

Input

The power supply characteristics comply with the relevant requirements of MIL-STD-810G.

Power Supply

2. 

+28V

3. 

+28V

4. 

+28V_GND

5. 

+28V_GND

6. 

+28V_GND

7. 

Power-On Control (+)

Input/Output

Refer to the requirements specified in the Power-On Control section.

I/O Control

8. 

Power-On Control (-)

9. 

RS422_RX+

Input/Output

The logic level and drive capability comply with the RS-422 interface standard.
Characteristic impedance: 120 Ω.

The transmit/receive pin definitions correspond to the laser rangefinder itself.

10. 

RS422_RX-

11. 

RS422_TX+

12. 

RS422_TX-

13. 

RS422_GND

14. 

External Synchronization Control Signal

Input

The logic level and drive capability comply with the RS-422 interface standard.

External synchronization signal used to control laser coding.

15. 

External Synchronization Control Signal (–)

Product Description

LDR80K1 80 mJ 1064 nm Laser Target Designator/Rangefinder Module

The LDR80K1 is an 80 mJ, 1.064 μm laser target designator and rangefinder module designed for airborne platforms and other mission-critical electro-optical systems that require high reliability and long-range engagement. It combines distance measurement and coded laser designation in a compact housing with low weight, long stand-off range, high accuracy and strong environmental robustness, making it ideal for aircraft pods, UAV payloads and vehicle turrets used with laser-guided artillery shells and precision munitions.

The module uses a laser-diode-array–pumped solid-state laser at 1064 nm and delivers an average single-pulse energy of at least 80 mJ per designation cycle, with pulse-to-pulse energy variation within ±10% after stabilization. Beam divergence is ≤ 0.30 mrad, pulse width is 15 ns ± 5 ns, and the optical axis parallelism relative to the mounting reference is held within 0.5 mrad, ensuring a tight and stable spot on target over long distances.

As a rangefinder, the LDR80K1 supports single-shot, 1 Hz and 5 Hz operating modes. The minimum measuring distance is ≤ 300 m, and the maximum measuring distance is ≥ 10 km for a 2.3 m × 2.3 m diffuse target with reflectance ≥ 0.2 under visibility ≥ 23 km and relative humidity ≤ 70%. Ranging accuracy is ≤ 5 m with a correct-range probability of at least 98%. At 5 Hz, the module can operate continuously for 5 minutes, followed by a rest period of no more than 3 minutes before further ranging.

In laser designation mode, the nominal verification pulse rate is 20 pulses per second. Short designation cycles provide 17 s of laser-on time with 30 s intervals and allow up to 8 consecutive cycles, while long designation cycles provide 60 s of illumination with 45 s intervals and up to 4 consecutive cycles. After completing one long and one short designation cycle, the next designation sequence must start within a 30-minute interval, giving the laser head appropriate thermal management and extending service life.

The LDR80K1 supports precise frequency coding that meets weapon-system coding requirements and offers user-programmable code expansion capability. Coding is implemented as precise frequency codes with eight groups of pre-stored period-code patterns, and coding accuracy is better than 2.5 μs. An external synchronization input with RS-422-level differential signaling can control the emission pattern for coding, enabling tight coordination with external fire-control or guidance computers.

Mechanically, the module fits within a footprint of ≤ 116 mm × 52 mm × 96 mm and weighs ≤ 680 g, supporting integration into compact gimbals and pods. Electrically, it operates from a DC 18–32 V input, with average power consumption ≤ 80 W and peak power ≤ 120 W. All internal PCBs receive conformal coating to protect against moisture, salt spray and fungal growth, improving long-term reliability.

A dedicated power-on control signal allows the host system to switch the module on or off independently. The electrical interface is implemented via a J30J-15ZKP connector, with multiple +28 V supply pins, corresponding grounds, differential power-on control, RS-422 RX/TX pairs, RS-422 reference ground, and an external synchronization pair. The RS-422 interface uses 115200 bps, 8 data bits, 1 start bit, 1 stop bit and no parity, with LSB-first transmission for both control commands and status feedback.

For power integration, the LDR80K1 is designed to share supplies with motors or other inductive loads provided certain conditions are met: soft-start (3–5 s) is recommended to avoid large induced over-voltages at switch-on; the designator’s power-on sequence should be staggered after other loads have stabilized; input lines should be isolated from inductive loads, and a DC filter (e.g., 30 V / 10 A) can be added at the module input when conditions permit. The system power supply must meet the peak power requirement; for example, a 24 V test supply should support at least 6 A output current.

Control and monitoring are handled over the serial interface. The module supports commands for single and continuous ranging at 1 Hz and 5 Hz, multiple designation modes (short, long and single/continuous illumination), range-gating, laser code configuration and query, total pulse-count query and stop commands. During ranging or designation, each laser pulse returns one set of distance data and status information. Designation commands have priority; a designation command will interrupt continuous ranging, and while designation is in progress, only the stop-designation command is accepted. The unit keeps a non-volatile record of cumulative laser pulses, supports power-on, periodic and start-up self-tests, reports fault codes, monitors internal temperature and outputs temperature alarms. A “ready” status frame is transmitted at 10-second intervals after initialization, and all messages include checksum verification for robust communication.

Environmentally, the LDR80K1 is specified for operation from −40 °C to +55 °C and storage from −45 °C to +65 °C. It withstands sinusoidal vibration from 15–33 Hz at 0.91 mm amplitude and from 33–700 Hz at 2 g in three orthogonal axes for 1 hour per axis, as well as 10 g shocks along vertical, lateral and longitudinal directions with 11 ms post-peak sawtooth waveforms. The unit is powered on during these tests and must function normally afterward, ensuring suitability for aircraft take-off/landing vibration and vehicle transport environments.

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