Diode Laser Rangefinder Module 905nm - 4000m
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PRODUCT DESCRIPTON
The LFR4000 is a compact, eye-safe semiconductor laser rangefinder module designed for high integration and wide application versatility. Featuring a lightweight structure and flexible interface options, it can be seamlessly embedded into handheld devices, optical systems, and customized equipment. Its precisely engineered transmitter and receiver lenses enable accurate distance measurement up to 4 km, ensuring reliable performance across targets with different colors or reflectivity levels. With a built-in TTL/RS232 interface, the module supports easy secondary development and smooth system integration.
Key Advantage
- High-precision long-range performance: Achieves up to 4 km measurement range with stable accuracy, independent of target reflectivity.
- Compact and highly integrable: Small form factor enables effortless installation in space-limited platforms such as gun sights, UAV pods, and portable devices.
- Strong environmental adaptability: Optimized optical design ensures consistent performance across various lighting and weather conditions.
- Developer-friendly design: Supports TTL/RS232 communication for efficient secondary development and fast system integration.
- Wide application coverage: Ideal for gun sights, aircraft pods, night vision devices, thermal imaging systems, and EVA (extravehicular activity) equipment.
TECHNICAL PARAMETERS
| Parameters | Specification |
| Laser wavelength | 905nm |
| Eye safe | Class 1 |
| Dimensions(mm） | 60.56*33.1*46.86mm |
| Range capability | 5-3800m (typical value) 5-4300m from woods |
| Resolution | ±0.1m |
| Working current | 80mA-123mA |
| Connector | RS232 / TTL /485 |
| Operating Temperature | -20º ~ 55º |
| Signal | RS232 output/TTL output/485output |
| Input voltage | 3~5V |
| Divergence | 5 mrad |
| Repetition Frequency(RF) | 1Hz |
| Power | ＜1mW（eye-safe） |
| Ranging method | pulse mode |
DIMENSION(mm)
INTERFACE
|
Pin No. |
Functiondescription |
 |
||
|
1 |
RS232-Tx |
|||
|
2 |
RS232-Rx |
|||
|
3 |
Powersupply：DC（3.0V-5.0V） |
|||
|
4 |
TxEN:Whenserialportstartstosenddataframe,TxENsignalishigh;After oneframedatatransmissionisover,TxENsignalislow.TxENSignalcanbe usedtoswitchfromemissiontoreceptionashalfduplex,suchasRS485. |
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|
5 |
GND |
|||
|
6 |
UART-RxD（TTL:Voltageisprogrammable：3.0V-5.0V）； |
|||
|
7 |
UART-TxD（TTL:Voltageisprogrammable：3.0V-5.0V)； |
|||
|
Note: 1.Thismodulehas2communicationserialoutput,RS232&TTL.Eachcanbeusedbydifferentpin outs,butcan'tbeusedatthesametime. 2.UARTSetting:10bitsaretransmittedorreceived;onestartbit,8databits(LSBfirst),onestopbit, non-parity |
||||
|
ElectricalCharacteristics |
||||
|
Parameter |
Testcondition |
Min |
Max |
Units |
|
Vin |
T=25°C |
2.5 |
5.0 |
V |
|
Icc |
Standby(T=25°C,Vin=3.0V) |
- |
50.0 |
mA |
|
Ranging(T=25°C,Vin=3.0V) |
- |
150.0 |
mA |
|
Information Download
-
PRODUCT DESCRIPTON
-
TECHNICAL PARAMETERS
-
DIMENSION(mm)
-
INTERFACE
-
Information Download
The LFR4000 is a compact, eye-safe semiconductor laser rangefinder module designed for high integration and wide application versatility. Featuring a lightweight structure and flexible interface options, it can be seamlessly embedded into handheld devices, optical systems, and customized equipment. Its precisely engineered transmitter and receiver lenses enable accurate distance measurement up to 4 km, ensuring reliable performance across targets with different colors or reflectivity levels. With a built-in TTL/RS232 interface, the module supports easy secondary development and smooth system integration.
Key Advantage
- High-precision long-range performance: Achieves up to 4 km measurement range with stable accuracy, independent of target reflectivity.
- Compact and highly integrable: Small form factor enables effortless installation in space-limited platforms such as gun sights, UAV pods, and portable devices.
- Strong environmental adaptability: Optimized optical design ensures consistent performance across various lighting and weather conditions.
- Developer-friendly design: Supports TTL/RS232 communication for efficient secondary development and fast system integration.
- Wide application coverage: Ideal for gun sights, aircraft pods, night vision devices, thermal imaging systems, and EVA (extravehicular activity) equipment.
| Parameters | Specification |
| Laser wavelength | 905nm |
| Eye safe | Class 1 |
| Dimensions(mm） | 60.56*33.1*46.86mm |
| Range capability | 5-3800m (typical value) 5-4300m from woods |
| Resolution | ±0.1m |
| Working current | 80mA-123mA |
| Connector | RS232 / TTL /485 |
| Operating Temperature | -20º ~ 55º |
| Signal | RS232 output/TTL output/485output |
| Input voltage | 3~5V |
| Divergence | 5 mrad |
| Repetition Frequency(RF) | 1Hz |
| Power | ＜1mW（eye-safe） |
| Ranging method | pulse mode |
|
Pin No. |
Functiondescription |
|
||
|
1 |
RS232-Tx |
|||
|
2 |
RS232-Rx |
|||
|
3 |
Powersupply：DC（3.0V-5.0V） |
|||
|
4 |
TxEN:Whenserialportstartstosenddataframe,TxENsignalishigh;After oneframedatatransmissionisover,TxENsignalislow.TxENSignalcanbe usedtoswitchfromemissiontoreceptionashalfduplex,suchasRS485. |
|||
|
5 |
GND |
|||
|
6 |
UART-RxD（TTL:Voltageisprogrammable：3.0V-5.0V）； |
|||
|
7 |
UART-TxD（TTL:Voltageisprogrammable：3.0V-5.0V)； |
|||
|
Note: 1.Thismodulehas2communicationserialoutput,RS232&TTL.Eachcanbeusedbydifferentpin outs,butcan'tbeusedatthesametime. 2.UARTSetting:10bitsaretransmittedorreceived;onestartbit,8databits(LSBfirst),onestopbit, non-parity |
||||
|
ElectricalCharacteristics |
||||
|
Parameter |
Testcondition |
Min |
Max |
Units |
|
Vin |
T=25°C |
2.5 |
5.0 |
V |
|
Icc |
Standby(T=25°C,Vin=3.0V) |
- |
50.0 |
mA |
|
Ranging(T=25°C,Vin=3.0V) |
- |
150.0 |
mA |
|