focusfinder.proby RMA Precision instrument · 2026

Find the focal point.
Measure it, don't
guess it.

Name: focusfinder.pro
Brand: RMA

focusfinder.pro precisely determines the real focal-point position of a laser beam. It pairs a simple measurement routine with numerical analysis — removing subjective operator judgement and reaching accuracy down to 50 μm^*.

Request a demo → See how it works

Accuracy

down to 50 μm^*

Min. spot Ø

from 35 μm

Coverage

1 unit · many machines

F / 01 · find your focus Find Your
Focus. focusfinder.pro — laser scanning an engraved test pattern

focusfinder.pro · in process

focusfinder.pro transport case and measurement key

Device · case + key

Rayleigh curve fit and focal position result

Result · beam caustic fit

50 μm accuracy No subjective assessment Portable across stations Fully automated analysis Single Mode lasers

§ 01 — Why focus matters

A few microns off focus,
and the weld goes unstable.

In laser welding — and especially with thin copper and aluminium — even a small deviation of the focal point from the work surface translates into an unstable process and weld defects. Standard visual assessment can't resolve that. focusfinder.pro is a complete RMA measurement solution built to pinpoint the real focal position where it actually counts.

→

50 μm^*

Measurement accuracy

→

35 μm

Min. spot diameter

→

03 steps

Engrave · acquire · result

→

1 unit

Shared across machines

↓

0 guesswork

Numerical, not visual

^*depending on the customer's system configuration.

§ 02 — Advantages

Why teams choose
focusfinder.pro.

A / 01

Accuracy down to 50 μm^*

Enough for welding copper, aluminium and other hard-to-weld materials — exactly where pulsed and visual methods fall short.

A / 02

Simple measurement routine

Engrave a test pattern, capture the plate image, run the automatic analysis. No elaborate installation and no changes to the machine structure.

A / 03

No subjective assessment

The result comes from a numerical fit of the Rayleigh curve of the beam caustic — not from a technologist's or operator's eye.

A / 04

One device, many machines

Unlike permanently mounted camera systems, focusfinder.pro moves between stations — lower cost to deploy and to run.

A / 05

Optimal price-to-accuracy ratio

Accuracy close to camera systems at a fraction of the price — lower purchase and maintenance cost.

focusfinder.proF · device

§ 03 — How it works

Three steps,
fully automated.

From an engraved test pattern to a numerical focal-position result — the operator runs the routine, the algorithm does the judging.

01 · engrave Laser engraving the test pattern

01/ 03

Engrave the pattern

The laser writes the designed test pattern across the measurement plate.

02 · acquire Acquiring the image of the test plate

02/ 03

Acquire the image

The engraved pattern is digitised — the kit produces a clean digital image of the plate, ready for numerical analysis.

03 · result Ideal profile and focal-point position

03/ 03

Automatic result

The algorithm fits the ideal profile and reports the laser's focal position to 50 μm^* accuracy.

§ 04 — Where it fits

Built for processes where
focus decides quality.

Laser welding programmes that demand repeatable focal positioning at the level of tens of microns.

U / 01POWER ELECTRONICS

Precision welding in
power electronics.

Laser welding across electronics and power electronics — power modules, busbars, cell interconnects and IGBT / SiC components, where focal position must repeat to tens of microns.

power modulesbusbarIGBT / SiC

U / 02LASERS

Single Mode
lasers.

Especially effective with small-spot lasers (from 30 μm) — infrared, green and blue sources — where focus tolerance is unforgiving.

IRgreenbluefrom 30 μm

U / 03MATERIALS

Hard-to-weld
materials.

Copper, aluminium, stainless steel and their bimetallic joints — processes where a focal-position error leads straight to weld defects.

CuAlSSbimetal

§ 05 — Process control

Where focusfinder sits
in the process chain.

From the Laser Application Center to the production floor — focal position is measured, set and logged inside a single process architecture. Applied per machine, not per batch.

01 · VALIDATE

Laser Application Center

Material trials, metallography and tensile testing validate the welding window before tooling is committed.

02 · SET FOCUS

Measure with focusfinder.pro

The real focal position is measured per machine to 50 μm — numerically, with no subjective assessment.

03 · WELD

Controlled energy input

Focal position corrected per joint; beam shaping and power profile matched to the material pair.

04 · MONITOR

Online monitoring & trace

Process signals captured per weld and logged per cell — documented, reproducible, audit-ready.

§ 06 — Industries served

Wherever focal precision
defines product safety.

Laser welding programmes across e-mobility, energy storage and power electronics — where joint quality and traceability decide whether the product ships.

SEG · 01