Brontes High Speed Luminance Colorimeter

Brontes Luminance Colorimeter

An ultra high speed tristimulus spot colorimeter

The Brontes from Admesy is a high speed luminance colorimeter that can record up to 5,500 colour or 18,500 luminance measurements per second. The Brontes is a tristimulus colorimeter based upon three photodiodes with a spectral response matched to the CIE 1931 2° XYZ observer functions by means of precision interference filters. Measurement parameters include luminance (cd/m²), XYZ tristimulus values, chromaticity (xy, u'v', L*a*b*), correlated colour temperature (Kelvin) and dominant wavelength (nm).

Spectral Response of Brontes Colorimeter Compared with CIE 1931 2 deg. Observer

Measure Luminance, Colour, Flicker & Switching Times

The Brontes colorimeter is well suited to measuring the performance of LEDs as well as LCD and plasma displays. The high measurement speed of the Brontes allows it to combine luminance, colour, flicker and switching time measurements in one instrument.

Multiple Control & Interface Possibilities

Measurements can be controlled from a PC through various interfaces but the real power of Brontes becomes clear when it is used as a stand-alone instrument for process control. Four I/O lines provide for triggering and PASS/FAIL type outputs. The Brontes colorimeter is supplied with an SCPI command interface for easy integration into Windows, Linux and MAC OSX software applications. All library functions are supplied together with an example program in multiple programming languages. Several interfaces are provided, including USB, I2C, RS-232C and GPIO.

The Brontes colorimeter makes use of standard VISA drivers. VISA drivers for use with the Brontes application can be found on the National Instruments website. To run the software, the VISA runtime engine for your platform will be needed. In order to develop software for the Brontes, you will need a valid VISA development license (included in LabVIEW). You can develop software in LabVIEW, LabWINDOWS, C++, C#, Visual Basic and any other language that is capable of communicating with VISA. Operating Brontes using open source libusb is also possible (further details on request).

Direct or Fibre Optic Measurements

Brontes is equipped with a lens that provides for a 6° field of view, while other vew angle options are available. In addition, an SMA coupling is available that allows an optical fibre to be attached to the colorimeter for remote measurements.

Specifications & Ordering Information

Model	Brontes
Measurement System	3 x silicon photodiodes
Spectral Response	CIE Tristimulus CIE x(l), y(l) & z(l)
Measuring Angle	6°
Measurement Spot Size	Distance	Spot Size
	0mm	0.85mm
	15mm	2.1mm
	25mm	3.0mm
	50mm	5.0mm
	75mm	7.2mm
Measurement Units	Luminance: cd/m²
Colour Systems	XYZ, Yxy, Yu'v', Lab, Luv, CCT, l_D
Measurement Speed	Luminance: 18 kHz
	Colour: 5 kHz
	Range	Accuracy
Luminance	0.05 ... 500,000 cd/m²	± 4% of measured value
Chromaticity		± 0.001 @ Cx/Cy = 0.333
Switching Time	> 0.1ms	± 5%
Flicker	> 0.05% at 50% luminance	> 0.01% at 50% luminance
Interface	USB 2.0, I²C, RS-232C
I/O	4 lines, 3.3V
Trigger	3.3V compliant
Dimensions	50 x 50 x 100mm
Operating Temperature	0 ... 40°C
Mounting	¼ BSW (fits ¼ UNC) mount on bottom plate 4 x M4 threat holes on bottom plate 4 x M4 threat holes on front plate