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1535 nm laser rangefinder module

The eye-safe band, in one place: 18 modules with the published range, the test condition behind that range, accuracy, mass, interface and update rate. Nothing here is normalised or extrapolated — a range figure is only ever quoted next to the condition it was measured under.

Full parameter set per model, including divergence, pulse energy, supply and temperature range: open any model page. Machine-readable rows: JSON / CSV dataset.

The condition behind each range

Two modules quoting "15 km" are not comparable until you know what they were pointed at. These are the manufacturer's own sentences, unedited:

What the band costs you

Questions that decide the part

What is a 1535 nm laser rangefinder module?

A laser rangefinder module measures distance by timing a pulse against a target and returning a digital distance value over a serial interface. At 1535 nm the transmitter is an erbium-glass source and the receiver an InGaAs avalanche photodiode, which is what allows the long-range end of this catalogue to exist at module level.

Why choose 1535 nm instead of 905 nm?

At 1535 nm the light is absorbed in the cornea before it can be focused onto the retina, so the allowable pulse energy is far higher than at 905 nm. That extra energy is what buys ranges in the kilometres. The trade-off is mechanical: InGaAs detection, larger apertures, more mass (typically hundreds of grams rather than grams) and slower update rates.

How far does a 1535 nm module actually reach?

Only as far as the published test condition says. Every range figure in this table is quoted with the target size, reflectance and visibility it was measured against, and those conditions differ per model. There is no single typical range for the band: read the condition that ships with the figure.

What interfaces do these modules use?

The published set across this band is RS-422, UART + RS-422, UART-TTL. A module returns a distance value over that link; the host supplies power, issues the trigger or query, and parses the reply. Protocol documents are available per model.

Is 1535 nm the same as 1.54 µm?

Yes. 1535 nm and 1.54 µm describe the same erbium-glass emission band, and both spellings appear in supplier datasheets. The catalogue normalises both to the 1535 nm band so that models are comparable.

What does the integrating design have to provide?

Power per the published supply specification, a trigger or query signal if the module is not free-running, and a host that parses the distance frame. The optical and timing work is inside the module; the mounting, thermal path and interface harness are yours.

Related: all 1535 nm models by range · 1535 nm vs 905 nm · range conditions table · LRF-C series