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Laser rangefinder modules for handheld and sport-optics OEM
Inside a monocular body there is no room for a compromise: 5–30 g, 905 nm, a display-friendly output, and an accuracy number that survives being printed on a box.
What the category actually needs
Sub-30 g, single-digit-gram electronics, 3.3 V, and a frame format a small MCU can parse. The published catalogue in this band runs 9 m to 1.5 km at 90 % reflectance, with ±0.2 to ±1 m accuracy and 3–200 Hz update rates. The 10 % reflectance column is the one your customer will complain about, so read both.
Optics, not electronics, drive the cost
In a handheld the module is rarely the cost driver — the eyepiece, the beam combiner and the display are. If your BOM is tight, take the module with the smallest aperture that still makes range on your target and spend the money on the optical train.
Class 1 at the eyepiece
A 905 nm module is the right choice here, but the classification that matters is the assembled product. If the transmit path runs close to the viewing axis, get the assessment done before tooling.
Modules that fit this application
LR1000E2
905 nm · 1 km · 10 g · UART-TTL
LRF1200A1
905 nm · 1.2 km · 18 g · UART-TTL
LRF50VB
905 nm · 50 m · 1.3 g · UART-TTL
SPD1200N2
905 nm · 1.5 km · 5 g · UART-TTL
SPD1200Z2
905 nm · 1.5 km · 6 g · UART-TTL