Irradiance

Calibration and Measurement

Orlab is NATA accredited for the calibration and measurement of the following items.

For more information, see our NATA Scope of Accreditation. 

ORLAB is capable of performing field measurements which may be required for, as examples, the independent verification of lighting installations or the assessment of installations that are the subject of litigation such as road lighting where an accident has occurred or an environment where a slip or trip accident has occurred an the lighting is being questioned.   In such cases, a NATA endorsed test report on the lighting will be generally be viewed by the court as more authoritative than an unendorsed report.

Light Meters 

Luminance

Luminance meters can be calibrated for Responsivity CIE Sources A and C.The results are typically given in the form of a correction factor rather than adjusting the readout.  A Photo Research Spectra Pritchard PR-1980A can be adjusted and a PR-880 can be programmed. From 0.1 cd.m-2 with a least uncertainty of 0.01 cd.m-2  or 1.4% (whichever is the greater). Extent of sensitive area. Spectral responsivity (broadband method).

Illuminance

Illuminance meters can be calibrated for responsivity  CIE Sources A and C. The results are normally given in the form of a correction factor rather than adjusting the readout. Up to 10 000 lux with a least uncertainty of 1.2% >10 000 to 50 000 (not part of a NATA endorsed report) with a least uncertainty of ?% Cosine correction. Spectral responsivity (broadband method)

Light Sources 

Luminous Intensity

ORLAB is NATA accredited for calibration and measurement of light sources for luminous intensity from 0.01 cd with least uncertainty of 1.0% for incandescent lamps, with or without broadband filters, 1.3% for other incandescent sources and 1.3% for other sources. Maximum dimension of source 0.3m (as at August 2014) Maximum dimension will become 1.8 m early 2015 (inclusion in NATA scope of testing to be advised).

Luminous Flux

ORLAB is NATA accredited for calibration and measurement of light sources for luminous flux from 1.5 lm with least uncertainty of 2.0% for incandescent lamps and 2.5% in luminous intensity for other sources. Maximum dimension of source 0.3m (as at August 2014). Maximum dimension will become 1.8 m by the end of 2014 (inclusion in NATA scope of testing to be advised)

Luminance

ORLAB is NATA accredited for calibration and measurement of light sources for luminance from 0.1 cd.m-2 with least uncertainty of 1.5% or 0.01 cd.m-2 (whichever is the greater) for incandescent lamps with or without broadband filters and 2.0% or 0.01 cd.m-2 (whichever is the greater) for other sources. These measurements can also be made on-site.

Spectral Irradiance

ORLAB is NATA accredited for calibration and measurement of light sources for spectral irradiance in the wavelength range 280 to 830 nm with least uncertainty of 0.3 nm in wavelength. 18% at 280 nm falling to 2.0% at 380 nm, 1.0% at 555 nm and rising to 2.4% at 830 nm in spectral irradiance. These measurements can also be made on-site in the wavelength range 380 to 780 nm with higher least uncertainties.

Spectral Radiance

ORLAB is NATA accredited for calibration and measurement of light sources for spectral radiance in the wavelength range 380 to 780 nm with least uncertainty of 0.7 nm in wavelength 3.3% at 380 nm falling to 1.0% at 555 nm and rising to 1.8% at 780 nm in spectral radiance. These measurements can also be made on-site.

Transmittance 

Spectral Transmittance

ORLAB is NATA accredited for calibration and measurement of spectral transmittance, direct and diffuse in the wavelength range 200 to 2800 nm. Least uncertainty of measurement vary depending on wavelength band, method used and value of transmittance. These measurements are used to characterise filters for calibrating spectrophotometers, transmittance densitometers etc and also for measuring products such as protective filers and window glass

Transmittance Densitometers

ORLAB is NATA accredited for calibration of transmittance densitometers including vertical light path photometers. Least uncertainty of measurement vary depending on wavelength band, method used and value of transmittance. These measurements are used to characterise filters for calibrating spectrophotometers, transmittance densitometers etc and also for measuring products such as protective filers and window glass

Spectrophotometers

ORLAB is NATA accredited for calibration of spectrophotometers with least uncertainties of measurement in the ultraviolet-visible spectrum of -0.3nm in wavelength, 0.1% minimum detectable stray light and 0.1% transmittance. These calibrations can also be carried out on-site.

Reflectance 

Spectral Reflectance

ORLAB is NATA accredited for calibration and measurement of spectral reflectance in the geometries of specular included, specular excluded and 0°/45°. In the wavelength range 280 to 2800 nm. Least uncertainty of measurement vary depending on wavelength band, method used and value of reflectance. These measurements are used to characterise surfaces for calibrating spectrophotometers, reflectance densitometers etc and also for measuring products such window glass, welding curtains etc.

Reflectance Densitometers

ORLAB is NATA accredited for calibration of reflectance densitometers in the geometries of specular included, specular excluded and 0°/45°with least uncertainties of measurement of 0.01 absorbance from 4 ABS

Spectrophotometers

ORLAB is NATA accredited for calibration of spectrophotometers in the geometries of specular included, specular excluded and 0°/45°with least uncertainties of measurement in the ultraviolet-visible spectrum of -0.3nm in wavelength, 0.1% minimum detectable stray light and 0.9% reflectance. These calibrations can also be carried out on-site

Colour, Haze and Gloss 

Calibration Standards - Reflectance

ORLAB is NATA accredited for calibration of reflectance colour standards in the geometries of specular included, specular excluded and 0°/45°with least uncertainties of measurement of - 0.4 delta E in CIE LUV and CIE LAB and 0.001 in CIE (1931) coordinates (x and y). This includes come limited measurements on fluorescent materials. with least uncertainties of measurement of -0.4 delta E in CIE LUV and CIE LAB and 0.001 in CIE (1931) coordinates (x and y). Reflex reflectivity colour: Retroreflective materials and devices with least uncertainties of measurement of -0.002 x and y.

Calibration Standards - Transmittance

ORLAB is NATA accredited for calibration of reflectance colour standards in the geometries of specular included, specular excluded and 0°/45°with least uncertainties of measurement of -0.4 delta E in CIE LUV and CIE LAB and 0.001 in CIE (1931) coordinates (x and y). This includes come limited measurements on fluorescent materials with least uncertainties of measurement of -0.4 delta E in CIE LUV and CIE LAB and 0.001 in CIE (1931) coordinates (x and y)

Gloss Meters

ASTM D523, DIN67530, ISO2813, AS1580.602.2, AS/NZS4443 C1.2.4.6

ORLAB is NATA accredited for calibration of glossmeters (20°, 60° and 85° geometries) with least uncertainties of measurement of -0.4 gloss units for high gloss (all geometries), 2.8 gloss units for semi gloss 20°, 1.0 gloss units for semi gloss 60° and 2.3 gloss units for semi gloss 85°

Haze Meters

ASTM D1003, ORLAB is NATA accredited for calibration of hazemeters with least uncertainties of measurement of -0.1% at 0% haze, rising to 0.45% at 20% haze and 0.65% at 40% haze. 

Incident Light 

ORLAB is NATA accredited for calibration of incident light colorimeters with least uncertainties of measurement of -0.0015 in chromaticity. ORLAB provides a calibration service for colour temperature meters with least uncertainties of measurement of 15K in the region of 2856K rising to ± 50K at 5500K and ± 200K at 12000K

Reflectance Tricolorimeters

ORLAB is NATA accredited for calibration of reflectance tricolorimeters in the geometries of specular included, specular excluded and 0°/45°with least uncertainties of measurement of -0.001 in CIE (1931) coordinates (x and y)

Transmittance colorimeters

ORLAB provides a service for calibration of transmittance colorimeters.

Optics 

Focimeters

ISO 8598, ORLAB is NATA accredited for calibration of focimeters with least uncertainties of measurement of-0.01 m⁻¹ in refractive power in the range -0.25 to +0.25 m-10.015 m⁻¹ in refractive power, in the range -25 to +25 m, -10.01 cm.m⁻¹ in prismatic power to 20 cm and -1 and 1° in axis

Refractive Power

ISO 8598, ISO 12311, ORLAB is NATA accredited for calibration of reference ophthalmic and other lenses with least uncertainties of measurement of- 0.01 m⁻¹ in refractive power in the range -0.25 to +0.25 m-1 0.015 m⁻¹ in refractive power in the range -25 to +25 m-1 0.01 cm.m⁻¹ in prismatic power to 20 cm.m-1 and 1° in axis