Goniophotometer
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Company synopsis Pleiades Instruments is an optoelectronic system maker, designing and manufacturing for you specific systems such as photometric measurement and customized systems. Designing high performance devices, our team assists you in standard and specific need. Our devices are used by automotive and general lighting industry for the development, the testing, the calibration and the production of different types of products such as rear or head lamps. Goniophotometers and Multicells systems, by analyzing the spatial distribution and the photometric properties of different kinds of...

Photometry and measurement Photometry Photometry is the science of the measurement of light, in terms of its perceived brightness to the human eye. Several photometry units can be used depending on what people want to study. Symbol Luminous Intensity Luminous Flux Candela per square meter [cd/m²] For Automotive lighting industry, the most common unit is the candela. It is the SI base unit of luminous intensity –power emitted by a light source in a particular direction, weighted by the luminosity function: V(λ)-. Luminosity Function This function, determinate in 1924 by the CIE, represents...

Illuminance is the total luminous flux incident on a surface, per unit area. It is a measurement of the intensity of the incident light. Illuminance is measured in lux. r Luminosity Intensity polar graph When the source can be considered as a point –for example a star- we have the formulas –if detector is perpendicular to the beam-: Photometric standards Photometric standards are defined according to geometries (Plane or Sphere), Units (Lux or Candela) and distances (10m for signaling and 25m or lighting). radius Surface ذݜ ðݑưݑݢĎݑҰݑ߰ݑ = Ұݑ. Ѱݑ߰ݑΰݑѰݑְݑ°ݑ, װݐ۰ݑ = ưݐ ۰ݑ ðݑpݑΰݑ۰ݑ ɰݑ = ưݑpݑΰݑ۰ݑ...

Goniophotometer Goniophotometer provides optimal conditions to obtain high precision. The product points to one or more photometric sensors, using a motorized, self-working stage. Different systems are available: Goniophotometer System for signaling measurement (GES_S), for lighting measurement (GES_L), for both (GES_SL) and with retrometer. The systems have 2 rotating axes and 3 translation axes to allow any angular position measurement you need. Our products can be used to test signaling functions: tail, stop, turn indicator, fog, reverse, lateral tail, CHMSL, DRL, reflectors, lighting...

Our goniophotometers have many assets such as: Stand alone systems (space saving and easier to install) thanks to the control rack inserted inside the device. Easy settings amplitude thanks to the traversing range. High angular precision (0.01°precision). Many supplies channels available: 7 channels multiplexer on product interface. Light (300kg) and compact. High maximum load (25kg/55pounds). Large measurement range: 0.0001 to 200000 lux. Thanks to their brand new design, our devices are among the most compact goniophotometers on the market. Easy alignment of products thanks to a laser....

Goniophotometer characteristics: Measurement cells Photometric range Display frequency Goniometer size Power requirements Lighting Signaling Lighting cell and/or Signaling cell Two power supplies: One power supply: Setting accuracy Software: ALPES, Pack Office

Goniophotometers & options Pleiades Instruments has designed different kind of goniophotometers to fit the specific needs of our clients. The designation of our devices is the following: Goniophotometers GES_S Signaling & Lighting You will find below options and spare parts that can be added to our system: Power supply GES_OPS Retrometer GES_ORM Lens GES_OSL Wires GES_OAW Reference Lamp GES_ORL Upon request • Agilent power supply • TTI power supply • Retrometer module • Spare lens • Additional specific wires to connect products to power supply • Signaling reference lamp • Lighting reference...

Options Power supplies GES_OPS Power supplies are used to adjust the current/voltage going through products. TTI power supply is used for lighting equipments (18V-20A, accuracy of measurement: 0,01%) whereas Agilent power supply is used for signaling systems (25V-7A, accuracy of measurement: 0,05%). Retrometer GES_ORM Retrometers are designed to measure retro-reflectance according to different standards. Used with a goniophotometer this device allows high precision measurements. Lens GES_OSL Lenses are used to reduce the distance between products and detectors. Spare lenses especially...

For measurements, we use the sign convention explained on the left, the product is placed at the center of the sphere. The cell detector is at 10 or 25m from the lamp, depending on the kind of device you are testing. V+ H+ Cell detector Product Photometer For the detection, we use a high precision luxmeter, for repeatable and precise measures of illuminance. The photometer head, made with a V(λ) filter, is placed on the optical axis. The impingement on the photoelectric cell of stray light, due to reflections or diffusion effects, is reduced to a minimum thanks to a stray light tube...

Software: ALPES. Our system is delivered with our fully applicative software called ALPES (Automotive Lighting Photometric Equipment Software). ALPES is an application used for controlling and running the photometric systems manufactured by Pleiades Instruments. It offers a user friendly and simplified user interface for operators in production mode, or a fully customizable software for administrators and Research & Development users. ALPES is used for all the systems sold by Pleiades Instruments: goniophotometer and multi-cells, and for different products: signaling and lightning. This...

Goniophotometers may be certified by the French certification body UTAC as it has already been done in the past to fulfill customer requests. UTAC is the Technical Union for the Automobile, Motorcycle and Cycle Industries. accredited by COFRAC also recognized as a certification body by the International Automotive Task Force UTAC is officially designated by the French authorities to the European Commission to perform all vehicle and equipment approval tests, under European directives. This body is also responsible for monitoring the conformity of production. Japan, Taiwan and Australia have...