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Photometry & Radiometry- Calibration ServicesOrdering Calibrations Services The Photometry and Radiometry Group develops and maintains the SI base unit of luminous intensity (the candela) and basic standards and measurement facilities in the fields of radiometry, photometry, and colorimetry, covering the spectrum from 200 nm in the ultraviolet to the far infrared. It disseminates these standards through calibration and consultation services to a varied clientele, which includes industries, universities, and government departments involved with lighting, transportation, public health and safety, communication, manufacturing, pulp and paper, television, and the environment. The Group maintains strong linkages with national and international standards laboratories and organizations through research, committee participation, and comparisons of national standards.  Services Uncertainties Facilities Fees
for Service
Contact: Dr. Joanne Zwinkels ServicesThe Photometry and Radiometry Group calibrates lamp standards of: luminous intensity, luminous flux, illuminance, luminance, spectral radiance and spectral irradiance for the wavelength range 300 nm to 800 nm. Spectrophotometric measurement services include spectral transmittances and spectral reflectances of transparent and opaque materials of all kinds (paints, plastics, textiles, ceramics, glass, etc.), including fluorescent materials. The spectral range covered depends upon the measurement, quantity; e.g. regular transmittance is avialable from 200 nm to 16 µm. Colour characterization of video displays is also offered as well as consultation services on the application of colour metrology to digital imaging. The Group can measure the characteristics of various types of detectors, such as silicon, germanium, and InGaAs photodiodes over the wavelength range 200 nm to 3000 nm. Detector properties that can be measured on a routine basis include: spectral responsivity, spectral temperature coefficients of responsivity, linearity, spatial and angular variation of uniformity of responsivity across a detector surface. Longwave (365 nm) and shortwave (254 nm) UV meters can also be calibrated. Gloss measurements at several standard geometries (20º, 60º, 45º, 85º) are made on specimens such as paints, papers, and ceramics. Primary calibrations of diffuse spectral reflectance factor can be performed on white standards for the pulp and paper industry. The colorimetric characteristics (chromaticity coordinates, colour differences) of paints, papers, textiles, plastics, etc. can be determined. The above list of measurement services is not comprehensive; other types of radiometric, photometric, colorimetric, and detector characterization measurements are available upon request.
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| A33-06-00-00 Custom Photometric or Radiometric Metrology Services Fee on request. |
Contact Dr. Joanne Zwinkels for further information |
| A33-06-00-01 Handling Fee $190 |
A charge is levied for any instrument found to be unsuitable for calibration. This fee covers opening, inspection and return and is based on the work done prior to discovery of the fault. |
Photometry
of Incandescent Lamps Calibration
of Photometric Instruments & Sources Spectrophotometry
& Colorimetry Spectroradiometry Measurements
of Detectors, Radiometers & Photometers Gloss
Measurements Colorimetry
of Video Displays
The NRC scale of luminous intensity is based on the international 1979
CGPM definition of the candela using NRC absolute radiometers and is maintained
on a group of specially selected Osram Wi41/G incandescent lamps. The
standard uncertainty ( 1
) of the primary luminous intensity scale is 0.5%. The NRC scale of luminous
flux is based on measurements traceable to an NRC platinum blackbody source
and is maintained on a set of 200 Watt and 500 Watt GEC incandescent lamps.
The standard uncertainty ( 1) of the primary luminous flux scale is 1.5%. The following services describe
routine photometric measurements that are available. Other specialized
photometric tests may be performed upon special request.
(A33-06-01-01 to A33-06-01-02)
These services cover the determination of the luminous flux (lumens) from
one or more incandescent lamps at one voltage or current per lamp, up
to 1000 watts, as follows:
| A33-06-01-01 $1595 |
One lamp at one voltage or current |
| A33-06-01-02 $319 |
Each additional lamp of the same size and type, supplied at the same time and calibrated under the same conditions as A33-06-01-01. |
(A33-06-01-03 to A33-06-01-05)
The horizontal luminous intensity (candelas) of one or more incandescent
lamps is determined in a fixed direction at one or more voltages or currents
per lamp, as follows:
| A33-06-01-03 $1595 |
One lamp at one voltage or current |
| A33-06-01-04 $319 |
Each additional lamp of the same size and type, supplied at the same time and calibrated under the same conditions as A33-06-01-03 |
| A33-06-01-05 $478 |
Each
additional voltage or current, requested at the same time as A33-06-01-03, per lamp. |
(A33-06-01-06 to A33-06-01-08)
To ensure that lamps are stable enough to be used as standards, they should
be operated or aged for a number of hours. These services cover the aging
of lamps in a controlled environment, as follows:
| A33-06-01-06 $797.50 |
Initial set-up charge for one lamp |
| A33-06-01-07 $159 |
Set-up charge for each additional lamp
of the same size and type (A33-06-01-06) |
| A33-06-01-08 $11 |
Hourly charge for aging each lamp (A33-06-01-06 and A33-06-01-07). |
(A33-06-02-01 toA33-06-02-03)
The colour temperature or the voltage for a specified colour temperature
on one or more incandescent lamps can be determined within the range 2000
kelvin to 2856 kelvin, as follows:
| A33-06-02-01 $1595 |
Colour temperature of one lamp or the voltage for one colour temperature of one lamp |
| A33-06-02-02 $319 |
Each additional lamp at the same colour temperature measured at the same time as A33-06-02-01 |
| A33-06-02-03 $145 |
Each additional colour temperature on the same lamp measured at the same time as A33-06-02-01. |
Illuminance meters and luminance meters are calibrated photometrically on a custom basis using NRC luminous intensity standards. Special luminance tests are also available for displays, sphere sources and other luminance sources. Contact Dr. Arnold Gaertner for details.
| A33-06-02-20 Fee on request. |
Illuminance meters |
| A33-06-02-30 Fee on request. |
Luminance meters |
(A33-06-03-01 to A33-06-03-05B)
Diffuse reflectance and transmittance measurements are available over
the wavelength range 200 nm to 2200 nm and 5000 cm-1 to 600 cm-1. The
NRC diffuse reflectance factor scale is based on the NRC Absolute Reflectometer,
over the wavelength range 360 nm to 850 nm, with an uncertainty of 0.3%;
at other wavelengths, it is based on the NIST scale, adjusted for the
results of an NRC-NIST intercomparison in 1981. The overall uncertainty
of routine calibrations of spectral diffuse transmittance or reflectance
factors in the ultaviolet-visible-near infrared region, including or excluding
the regular component, ranges from 0.4% to 0.7%, depending on the wavelength
range, and excluding sample-dependent effects. The following services
(A33-06-03-01 to A33-06-03-05) are for non-fluorescent materials and for
standard wavelength ranges. Additional charges may apply for fluorescent
materials or for non-standard measurement conditions. Total and diffuse
reflectance measurements in the infrared (services A33-06-03-05A and A33-06-03-05B)
are performed on an FTIR reflectometer incorporating an integrating sphere.
The overall uncertainties in these values are (0.05R+0.04) where R is
the measured total or diffuse reflectance value.
| A33-06-03-01A $667.50 |
Total
(regular and diffuse) reflectance or transmittance, 400 nm to 700 nm at 5 nm intervals, one sample. |
| A33-06-03-01B $667.50 |
Diffuse-only reflectance or transmittance, 400 nm to 700 nm at 5 nm intervals, one sample. |
| A33-06-03-02A $812.50 |
Total (regular and diffuse) reflectance or transmittance,
250 nm to 850 nm at 5 nm intervals, one sample. |
| A33-06-03-02B $812.50 |
Diffuse-only reflectance or transmittance, 250 nm to 850 nm at 5 nm intervals, one sample. |
| A33-06-03-03 50% of first sample |
Each additional sample A33-06-03-01A or B and A33-06-03-02A or B |
| A33-06-03-04A Fee on request |
Total (regular and diffuse) reflectance or transmittance, 250 nm to 2500 nm at 10 nm intervals, one sample. |
| A33-06-03-04B Fee on request |
Diffuse-only reflectance or transmittance, 250 nm to 2500 nm at 10 nm intervals, one sample. |
| A33-06-03-04C $1095 |
Total (regular and diffuse) reflectance or transmittance, 250 nm to 2200 nm at 10 nm interals, one sample. |
| A33-06-03-04D $1095 |
Diffuse-only reflectance or transmittance, 250 nm to 2200 nm at 10 nm intervals, one sample. |
| A33-06-03-05 50% of first sample |
Each additional sample (A33-06-03-04A to 04D). |
| A33-06-03-05A $1820 |
Total reflectance (specular and diffuse), 5000 cm-1 to 600 cm-1 |
| A33-06-03-05B $1820 |
Diffuse (non-specular) reflectance, 5000 cm-1 to 600 cm-1 |
(A33-06-03-06 to A33-06-03-10E)
Calibrations of regular transmittance are traceable to the NRC Reference
Spectrophotometer, which has an uncertainty of 2.5 parts in 104 in the
visible range and 4.0 parts in 104 in the near-infrared range. Routine
calibrations are performed on high-precision research spectrophotometers
over the wavelength range 190 nm to 3200 nm; with a best measurement capability
(relative) of 0.2%. Services are for calibrations using monochromatic
irradiation. Arrangements can be made for special setups and supplementary
measurements. Additional charges may apply for non-standard measurements,
such as polarizing, highly spectrally selective, high transmission density,
or small size samples. Spectral regular transmittance factors are measured
for specified wavelength ranges, for one or more samples, as follows:
| A33-06-03-06 $522.50 |
From 380 nm to 760 nm at 5 nm intervals, one sample |
| A33-06-03-07 $595 |
From 190nm to 860 nm at 5 nm intervals, one sample |
| A33-06-03-07A $342.50 |
Client specified single wavelength (UV-VIS-NIR range) |
| A33-06-03-08 50% of first sample |
Each additional sample (A33-06-03-06 and A33-06-03-07) |
| A33-06-03-09 $885 |
From 190nm to 3200 nm at 10 nm intervals |
| A33-06-03-10 50% of first sample |
Each additional sample (A33-06-03-09). |
| A33-06-03-10A $667.50 |
Re-certify NIST SRM 930 filters (set of 3) |
| A33-06-03-10B $957.50 |
Re-certify NIST SRM 1930 filters (set of 3) |
| A33-06-03-10C $1280 |
NG-11 glass filter and calibration at 4000 cm-1 to 2000 cm-1. This service includes the purchase of the glass filter. |
| A33-06-03-10D $637.50 |
Wavelength absorption peaks, 250 nm to 900 nm |
| A33-06-03-10E $847 |
Wavenumber, polystyrene film, 4000 cm-1 to 800 cm-1 |
(A33-06-03-11A to A33-06-03-12)
The following services measure the absolute specular reflectance (7.5o
incidence) for one or more samples for specified wavelength ranges and
for a minimum and maximum sample size of 35 mm diameter and 50 mm diameter,
respectively, and for a nominal reflectance exceeding 10%. Arrangements
can be made to calibrate samples of smaller size or lower reflectance,
but additional charges may apply.
| A33-06-03-11A $812.50 |
Spectral reflectance, visible range, 380 nm to 760 nm |
| A33-06-03-11B $957.50 |
Spectral reflectance, UV-Vis range, 200 nm to 850 nm |
| A33-06-03-11C $1247.50 |
Spectral reflectance, Vis-NIR range, 380 nm to 2500 nm |
| A33-06-03-11D $1392.50 |
Spectral reflectance, UV-Vis-NIR range, 200 nm to 2500 nm |
| A33-06-03-12 50% of each sample |
Each additional sample (A33-06-03-11A to A33-06-03-11D). |
(A33-06-03-13 to A33-06-03-14A)
n the following services, various colorimetric quantities are calculated from the spectrophotometric data. Calculations of other quantities (e.g. solar transmittance and reflectance) are available upon special request.
| A33-06-03-13 $111 |
Tristimulus values & chromaticity coord's (one sample) |
| A33-06-03-14 $168 |
Colour differences (1 sample) |
| A33-06-03-14A Fee on request |
CIE whiteness and CIE tint, ISO brightness |
The following services provide for the calibration of white reflectance standards for the pulp and paper industry, according to ISO 2469 and ISO 2470 specifications.
| A33-06-03-15A $1102.50 |
Diffuse reflectance, 380 - 760 nm & ISO brightness |
| A33-06-03-15B $1392.50 |
Diffuse reflectance, 380 - 1100 nm & ISO brightness |
| A33-06-03-16 50% of first sample |
Additional sample of above 2 |
The NRC scale of absolute 45/0 spectral radiance factors is traceable to a master NRC pressed tablet of polytetrafluoroethylene calibrated for 45/0 geometry by NIST. The uncertainty of these NRC calibrations is ±0.7%.
| A33-06-03-26 $740 |
Bidirectional reflectance, 380 - 760 nm |
| A33-06-03-28 $957.50 |
Bidirectional reflectance, 380 - 1100 nm |
| A33-06-03-30 50% of first sample |
Additional sample of above 2 |
NRC calibrates and issues a stainless steel reflectance standard for use in calibrating the specular reflectance scale of spectrophotometers.
| A33-06-03-40 $2317.50 |
Stainless steel reflectance standard and calibration at 250 nm to 2500 nm, 7.5° incidence. Calibrations at other geometries are available upon special request. |
| A33-06-03-42 Fee on request |
Calibration at oblique incidence, specified spectral range |
| A33-06-03-50 $957.50 |
380 nm to 780 nm, 1 geometry, 1 sample |
| A33-06-03-51 $957.50 |
205 - 380 nm, one geometry, 1 sample |
| A33-06-03-52 $1537.50 |
205 nm to 780 nm, 1 geometry, 1 sample |
| A33-06-03-54 $1465 |
380 nm to 2300 nm, 1 geometry, 1 sample |
| A33-06-03-56 $2117.50 |
205 nm to 2300 nm, 1 geometry, 1 sample |
| A33-06-03-58 50% of first sample |
Additional sample of each of above 4 |
The NRC scale of spectral irradiance from 300 nm to 800 nm is based on
the world-mean scale resulting from a 1973 international intercomparison
of spectral irradiance scales, and is maintained on a group of 500 Watt
quartz-halogen lamps. Calibrated spectral irradiance standard lamps can
be purchased. These standards are 200 Watt quartz-halogen lamps, specially
selected, aged and calibrated at a fixed dc current and with the spectral
irradiance defined at a working distance of 43 cm. The standard uncertainty
( 1) in these lamp
standards varies from 2% (400 nm to 800 nm), to 3% (350 nm to 400 nm),
to 10% (300 nm to 350 nm).
Spectral irradiance and spectral radiance calibrations are also available on user-supplied lamps over the same wavelength range. The spectral radiance calibrations are derived from NRC spectral irradiance standards or NIST spectral radiance standards.
(A33-06-04-01 to A33-06-04-04)
The following services cover measurements in specified wavelength ranges
of the spectral irradiance from an incandescent lamp at a fixed distance
and in a given direction.
| A33-06-04-01 $4276 |
350 1100 nm at 10 nm intervals, one lamp |
| A33-06-04-02 $4276 |
800 - 1600 nm at 10 nm intervals, one lamp |
| A33-06-04-03 Fee on request |
From 300 nm to 350 nm |
| A33-06-04-04 Fee on request |
Additional lamp of each of above 3 |
These services measure the spectral radiance of a uniform incandescent lamp, in a given direction, for specified wavelength ranges and intervals.
| A33-06-04-09 $2607 |
From 380 nm to 780nm at 5 nm intervals. |
| A33-06-04-10 $2607 |
From 380 - 1060 nm at 4 nm intervals |
| A33-06-04-12 Fee on request |
From 300 - 800 nm |
The spectral radiance of a portion of a strip-filament lamp can be measured, in a given direction, for specified wavelength ranges and intervals.
| A33-06-04-12 Fee on request |
From 300 nm to 800 nm at 5 nm intervals. |
The measurement facilities in spectrophotometry include a two-monochromator reference spectrofluorimeter for absolute radiometric calibrations of fluorescent reflecting materials. This instrument conforms to CIE and ASTM colorimetry standards and employs a measurement geometry of 45º annular illumination and 0º viewing, and an operating range of 250 nm to 1050 nm. The overall uncertainty of calibrations of total and reflected radiance factors of fluorescent standards is 1% (excluding sample-dependent effects).
| A33-06-04-32 $1682.50 |
From 300 nm to 850 nm, one illuminant. Reflected and total spectral radiance factors are also provided on diskette. |
| A33-06-04-34 $252.50 |
Additional illuminant (A33-06-04-32) |
| A33-06-04-36 $217.50 |
Additional
bispectral luminescent radiance factor data, on diskette (A33-06-04-32). |
| A33-06-04-38 $812.50 |
As per A33-06-04-32 except reflected radiance factors only. |
Spectral responsivity calibrations are traceable to NRC absolute radiometers.
Measurements are performed using continuous (i.e. not chopped) radiation.
The overall expanded uncertainty ( k=2 ) of routine calibrations ranges
from 0.25% to 5%, depending upon the wavelength range and the type of
detector, and excluding detector-specific effects. For absolute calibrations,
a minimum detector size of 2.0 mm is normally required, but smaller detectors
can sometimes be calibrated. Special set-up charges apply to photomultipliers.
High-accuracy calibrations of specially-selected silicon and germanium
photodiodes are also available upon special request. The minimum detector
size for these calibrations is 5 mm. The combined standard uncertainty
( 1) for these measurements
is about 0.3% for silicon (400 nm to 1000 nm) and 0.35% for germanium
(1000 nm to 1600 nm).
Other detector characterization measurements are available: temperature coefficients of responsivity; linearity (dynamic range of approximately 6 decades); spatial uniformity of responsivity; angular variation of responsivity ( underfill mode ); and calibration of shortwave and longwave UV meters. The following services are for one receiver of a given model.
| A33-06-05-04 $967.50 |
Absolute
spectral responsivity: UV-VIS (maximum range is 200 nm to 700 nm) |
| A33-06-05-05 $967.50 |
Absolute spectral responsivity: VIS-IR
(maximum range is 400 nm to 1200 nm) |
| A33-06-05-06A $967.50 |
Absolute spectral responsivity: FIR (maximum range is 700 nm to 1800 nm) |
| A33-06-05-06B $967.50 |
Absolute spectral responsivity: FIR (maximum range is 1200 nm to 2700 nm) |
| A33-06-05-07 $527.50 |
Each additional receiver (A33-06-05-04 to A33-06-05-06B) of same model and for the same calibration conditions |
Specular gloss calibrations are performed on the NRC Reference Glossmeter using a specially-developed NRC quartz wedge as the primary standard. This measurement service is available for 20o, 60o, and 85o geometries according to ASTM D523 and ISO 2813 specifications, with an uncertainty of 0.3 gloss units, and at 45o geometry according to ISO 7668 specifications. The following fees are for non-metallic specimens. Additional charges apply for mirror samples.
| A33-06-06-01 $867.50 |
Gloss at one geometry (20o, 60o, or 85o), one sample |
| A33-06-06-02 $252.50 |
Each additional sample, calibrated under the same conditions as A33-06-06-01. |
| A33-06-06-10 $1102.50 |
Gloss at 45o, one sample |
| A33-06-06-12 $325 |
Each additional sample, calibrated under the same conditions as A33-06-06-10 |
Colour characterization of customer's video displays (CRT, FPD, etc.) is available upon special arrangement. The reference spectroradiometer used at NRC for these measurements is traceable to NRC primary photometric standards. The following services are available:
In addition, calibration and verification services are available for colorimeters used for the routine measurement and adjustment of video displays of given types. This involves determining the relationship between the colorimeter's built-in colour matching functions and the CIE colour-matching functions.
| A33-06-07-02 Hourly charge |
Custom colorimetric services for digital imaging devices |
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Important Notices | |
)-correcting
filters. Secondary standards of luminous intensity are in the form of
carefully selected lamps traceable to the NRC absolute radiometers. The
primary scales of spectral transmittance, reflectance, and gloss are based
on specially built NRC reference instruments.