Goniophotometers Goniometer + Photometer = Goniophotometer The word gonio (γονιο) derives from the Greek meaning angle. A goniometer is an instrument that measures angles most accurately. Photometer derives from the Greek photon (φοτον) = light and is an instrument that measures light.

A goniophotometer therefore performs the measurement of the spatial distribution of a radiation source and displays the photometric properties of the light visible to the human eye in relation to a defined angular position.
The automotive and general lighting industries use goniophotometers for lighting research and as a control measure in their manufacturing workflow.
Whatever the requirement, Optronik has the solution with 5 standard goniophotometer systems designed for specific applications to be combined with various measurement devices. Our modular goniophotometer systems enable you to assemble a system tailored to your own unique requirement.

- Measurement of illuminance E in lux
- Measurement of intensity distribution I in cd
- Measurement of luminous flux φ in lm
- Measurement of color coordinates and correlated color temperature
- Measurement of luminance L in cd/m²
- Measurement of retro-reflection R in mcd/lx
- Test and calibration of sensors

Typical applications include
Automotive lighting (headlamps, tail-lamps, & direction indicator lamps, luminance of license plates)
Road traffic signs
Airport taxiway lighting
LEDs and LED luminaires
General lighting (directional radiation sources)
- Retro-reflecting materials
- Bicycle and motorbike lights
- Aerospace & marine lamps
- Endoscopic illuminators

SETTING STANDARDS IN GONIOPHOTOMETRY
Optronik's SMS-10 family of goniometers are characterized by:

- The most modern designs on the market.
- Faster measurement speeds; up to 5,000 measurements per second for fast grid and rapid slice measurements
  (typical grid only takes about 7-8 min.).
- Rotation speed up to 50°/s.
- Highest photometer accuracy class L according to DIN5032, CIE69.
- Higher angular resolution for equivalent speeds.
- Greater photometric sensitivity - for example, to better define a low beam cut-off line.
- New vv10dsp preamplifiers for convenient, high speed measurement of state-of-the-art light sources such as xenon,
  neon, and pulse width modulated LED sources. Optional pulse frequency detection.
- Applications and post-sales support from the market leader: longest in the market with one of the largest customer
  bases.
- Unique processing speed; OptoCAN bus gives highest data processing speed and reduces the number of
  connecting cables.
- Modular system design with convenient graphic liquid crystal displays.
- Flexible LightCon software designed in partnership with leading lamp manufacturers to control the goniometer
  and share test data across a network.

Goniometer Mechanics Overview
The Optronik SMS-10 range comprises 5 distinct models applicable to a wide range of sample sizes and weights

SMS-10µ
A compact goniometer designed for measuring small-sized test objects like LEDs, retro-reflecting materials, optical glass fiber cables or turn signal lamps.

SMS-10m
The mid-sized model designed for objects up to 600mm. Two rotating axes and a height adjustable test table.

SMS-10c
The universal model meeting the requirements of the automotive & aerospace industries for rapid, on-the-fly slice measurements. This system is equipped with a fully motorized table with 2 rotational axes and 3 linear axes. Samples are automatically positioned.

SMS-10h
The top of the range model, for large sources such as brake lights, signal turn lamps, rear fog & rear signal lamps for rapid, on-the-fly slice measurements.This system is equipped with a fully motorized table with 2 rotational axes and 3 linear axes. Samples are automatically positioned.

SMS-10s
For the largest sized sources such as traffic lights and lighted signs commonly used on highways and railways.

The Optronik "Goniophotometers" Brochure (PDF 1.4 MB)