Reflectance Standards
Avian Technologies is not responsible for typographical errors
in these descriptions.
Please contact us for a quotation for any of our products.
Fluorilon-99W |

Hemispherical reflectance |
Fluorilon-99W is a sintered PTFE material with the highest diffuse
reflectance of any known material. Produced by an entirely new process compared
to previously produced sintered PTFE products, Fluorilon-99™ offers the
following properties:
- Total hemispherical reflectance of 99% in the 400-800 nm region
- Reflectance of >97% over most of UV-Vis-NIR region (300-2200 nm)
- Reflectance of >92% from 250-2500 nm
- Durable and cleanable
Standards are available as 1.25" (32 mm) or 2" (50.8
mm) diameter pucks, with a Delrin™ (trademarked Dupont throughout) holder with protective cover.
Larger targets (up to 12"/300 mm square in single piece,
up to 48" square/ 1200 mm) as arrays are also available.
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FT2186: Fluorilon FW-99-02 Bidirectional Reflectance Distribution Function (BRDF) VS. Detector Angle (th_r)
Wavelength=0.799 µm, incident angle 10°
Excel file with the above data |
Part numbers† for Fluorilon reflectance standards
Part # |
Description |
FW99-01C
FW99-01U |
1.25" White Fluorilon (round) |
FW99-02C
FW99-02U |
2" White Fluorilon (round) |
FWT99-02C FWT99-02U |
2" x 2" White Fluorilon Cupped in Delrin holder |
FWT99-04C FWT99-04U |
4" x 4" White Fluorilon Cupped in Delrin holder with ¼-20 mount |
FWT99-05C FWT99-05U |
5" x 5" White Fluorilon Cupped in Delrin holder with ¼-20 mount |
FWT99-06C FWT99-06C |
6"x6" White Fluorilon Cupped in Delrin holder with ¼-20 mount |
FWT99-10C FWT99-10U |
10"x 10" White Fluorilon
Cupped in Aluminum holder with ¼-20 mount |
FWT99-12C FWT99-12U |
12" x 12"White Fluorilon
Cupped in Aluminum holder with ¼-20 mount |
† C indicates calibrated standard, traceable to NRC. U indicates uncalibrated,
nominal data are available. |
Fluorilon-99W is available in bulk in sizes up to 12" square and
up to 2" thick. Price is dependent on size and quantity.
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Avian Gold Standards and Targets |
Hemispherical reflectance |
Diffuse gold is an excellent standard for wavelengths from above
850 nm. to >15µ. Avian Technologies AvianGold offers
high diffuse reflectance of > 90% from 1000 nm to well into
the mid-infrared.
Standards and targets are available both calibrated‡ and uncalibrated,
ranging from 2 diameter or square to 10 square. Custom
sizes are available upon request. All square targets are mounted in an anodized aluminum holder with a ¼-20 mount.
| Part # |
Description‡ |
RTAu-02C RTAu-02U |
2 Square Diffuse Gold target |
RSAu-02C
RSAu-02U |
2 Diameter Diffuse Gold Standard in Delrin holder |
RTAu-06C RTAu-06U |
6 Square Diffuse Gold target |
RTAu-10C RTAu-10U |
10 Square Diffuse Gold target |
‡C indicates calibrated 800-2500 nm. U indicates uncalibrated. (Nominal data are available). Calibration from 2-20µm is available for an additional charge
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Russian Opal Glass |
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Useful as a durable white standard in the visible-near infrared, Russian Opal
Glass MC-20 is primarily used in its glossy form. The glossy Russian opal is easily
cleaned and quite stable. Russian Opal is the preferred standard for direction/
directional geometry such as 0/45 or for multi-angle spectroscopy. It is also useful
as a standard for hemispherical measurements.
Custom sizes are available by special order.
| Part # |
Description |
| ROG-02C |
2" Russian Opal, in holder, boxed. Calibrated from 350-830
nm |
| ROG-02U |
2" Russian Opal, in holder, boxed. Uncalibrated |
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Matte Russian Opal Glass |
Hemispherical reflectance |
In conjunction with our partners in Scandinavia, Mitaten Finland
Ab, Avian Technologies has developed a new, highly matte Russian
Opal Glass standard. The standard has gloss levels of <0.2 units
at 60°. The material also offers excellent reflectance
properties far into the NIR. This standard has found great usage
in the paper industry in Europe.
We currently offer the standard in round and square configuration. Both will be mounted in a Delrin
holder with cover.
| Part # |
Description |
| MROG-02C |
50 mm Matte Russian Opal, boxed, calibrated 360-830 nm |
| MROG-02U |
50 mm Matte Russian Opal, boxed, uncalibrated |
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Gray Scale Standards |
Hemispherical reflectance |
Gray scale standards are essential for establishing
the photometric linearity of a reflectance spectrometer. These
are used in the same way neutral density filters are used in transmittance
instruments. Avian Technologies Fluorilon(TM) Gray Scale standards
allow the user to calibrate an instrument over a 2 decade range
of reflectance, which is well over the typical range seen by a
reflectance instrument. The materials are highly diffuse and therefore
have little angular dependence and almost no gloss, which means
that specular included and excluded geometries should show little
difference in reflectance values.
The standard sets consist of four standards of nominal reflectance
(at 600nm) of 2%, 10%, 50%, and 99% reflectance. The standards
are cupped in a Delrin holder with cap. The sets are presented
in a waterproof plastic box. |
| Part # |
Description |
| FSS-04-01 |
1.25" Fluorilon Gray Scale Reflectance Standard Set
Calibrated, Traceable to NRC, Boxed |
| FSS-04-02 |
2.0" Fluorilon Gray Scale Reflectance Standard Set
Calibrated, Traceable to NRC, Boxed |
| FSS-08-01 |
1.25" Fluorilon Expanded Gray Scale Set of 8 stds.
Nominal Reflectances: 2%,5%,10%,20%,40%,60%, 80%,99%)
All have tolerances of ±2% at 600nm except the 2%, and 99%, which
have ±1%. |
| FSS-08-02 |
2.0" Fluorilon Expanded Gray Scale Set of 8 stds.
Nominal Reflectances: 2%,5%,10%,20%,40%,60%, 80%,99%)
All have tolerances of ±2% at 600nm except the 2%, and 99%, which
have ±1%. |
Individual Standards
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| FGS-XX-01 |
1.25" Fluorilon Gray Standard, Calibrated traceable
to NRC, (xx designates nominal reflectance at 600nm) |
| FGS-XX-02 |
2.0" Fluorilon Gray Standard, Calibrated traceable
to NRC, (xx designates nominal reflectance at 600nm) |
Gray scale standards are also available uncalibrated. |
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‘Encapsulated’ Grey Scale and Wavelength Standards to meet USP 1119
Avian Technologies is introducing new ‘encapsulated’ grey scale and wavelength
standards to meet USP 1119. The standards are identical to the Fluorilon FSS-08-02c
kit except the Fluorilon is encased in a Delrin™ holder with a 2” diameter BK-7 window.
The overall size of the standard is 2.400” diameter (61 mm) and 0.620” thick (15.88 mm).
The size of both the grey scale and wavelength standards is identical to enable fixturing
for most instruments designed to measure pharmaceutical on-line processes.
The wavelength standard has the same components as the National Institute of Technology’s SRM-1920a,
with a small amount of an inert, spectrally non-absorbing binder. Unlike sintered equivalents of
SRM-1920a, this standard exhibits no peak shifting and is both durable and stable.
Both grey scale and wavelength standard have a small, re-sealable port in the top to
allow for conditioning of the standard in a controlled humidity environment. |
| Part # |
Description |
| EN-FSS-04-02c |
Set of four grey scale standards, cells with BK-7 window,
nominal 8°/hemispherical reflectance of 2%, 10%,
40%, and 99%, calibrated from 400-2400 nm, traceable
to NIST/NRC. |
| EN-FSS-08-02c |
Set of eight grey scale standards, cells with BK-7 window,
nominal 8°/hemispherical reflectance of 2%, 5%, 10%, 20%,
40%, 60%, 80%, and 99%, calibrated from 400-2400 nm, traceable
to NIST/NRC. |
EN-FSS-08-02c kit comes in a waterproof plastic box to hold eight
standards. EWC-P1920a-02c comes in an individual wooden box.
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CERAM Gray Scale Tile Set |

Hemispherical reflectance |
In some cases, especially where durability and frequent cleaning are necessary or
organic fumes or grease are present, ceramic tile standards provide a better choice
than matte standards. In addition, these targets are more suited to small spot
measurements or at 0:45 geometry, where the specular component is automatically excluded.
The standard set consists of nine standards (white, 80%, 70%, 60%,
50%, 33%, 8%, 4.5% black, and a black glass) in Delrin
holders with a 1" mounting
counter bore in the back of the standard. The standards are presented
in a waterproof plastic box. Note all reflectance percentages are
nominal.
Representative measured data, along with D65/2° L*a*b* and x, y, Y values can be downloaded from
this spreadsheet (these are bidirectional radiance factor).
| Part # |
Description |
| BCRA-GS9-02c |
Ceramic tile grey scale set (calibrated at 8°/hemispherical) |
| BCRA-GS9-02c450 |
Ceramic tile grey scale set (calibrated at 45c:0
bidirectional) |
| BCRA-GS9-02u |
Ceramic tile grey scale set (uncalibrated) |
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BCRA black and white ceramic tile individual standards
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These standards are the same as described above, available individually.
| Part # |
Description |
| BCRA-WT-02C |
BCRA White tile, 2" square, boxed, calibrated 8°/hemispherical |
| BCRA-WT-02U |
BCRA White tile, 2" square, boxed, uncalibrated |
| BCRA-BK-02C |
BCRA Black tile, 2" square, boxed, calibrated 8°/hemispherical |
| BCRA-WT-02U |
BCRA White tile, 2" square, boxed, uncalibrated |
| Above individual standards
are also available with 45c:0 bidirectional radiance factor
calibraration. Specifiy BCRA-XX-C450 |
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Color Standards |
CERAM Color Standards |
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CERAM Research Ceramics Standards, also known as BCRA Series
II tiles, are the popular standards for color in the US and abroad.
These standards can be used
to calibrate color spectrophotometers in both hemispherical
and directional/directional geometry. Avian Technologies
BCRA sets consist of fourteen 2" tiles (the
standard BCRA set plus a black and a white tile),
mounted and sealed to prevent effects of humidity.
Standards come in a plastic box.
For an in-depth analysis
of CERAM tiles, refer to "The BCRA-NPL Ceramic Color Standards
Series II- Master Spectral Reflectance and Thermochromism Data",
F. Malkin, J. Larkin, J. Verrill, and R. Wardman, JSDC 84, 84-94
(1997).
These standards are available calibrated with 8°/hemispherical
and/or 45:0c bidirectional geometries. Representative data, along with
D65/2° L*a*b* and XYZ values can be downloaded
for these measurement geometries: 45/0, SCI, SCE. |
Part # |
Description |
| BCRA-14-02c8H |
BCRA set with extra black and white tiles
Calibrated for reflectance @ 8° hemispherical geometry,
360-830 nm |
| BCRA-14-02c450 |
BCRA set with extra black and white tiles
Calibrated for reflectance @ 45:0c bidirectional geometry,
380-720 nm |
| BCRA-14-02u |
BCRA set with extra black and white tiles Uncalibrated |
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Individual Color Standards |
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If you wish to assure an instrument stays within calibration but do not have
the time it takes to run a full set of CERAM standards, it is suggested that
a single time with some spectral structure be used**. We have found that the
best tile within the BCRA Series II set is the cyan tile. We offer this tile
either calibrated or uncalibrated, made to the same specifications as the
set described above. The tile is sealed in a Delrin holder and comes shipped
in hinged a plastic box. |
| Part # |
Description |
| BCRA-Cy-C |
Cyan BCRA Tile, Boxed Calibrated for
reflectance @ 8° hemispherical Geometry, 360-830 nm |
| BCRA-Cy-U |
Cyan BCRA Tile, Boxed, uncalibrated |
| Cyan tile are also
available with 45c:0 bidirectional radiance factor calibraration.
Specifiy BCRA-Cy-C450 |
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** "An Abridged Technique to Diagnose Spectrophotometric Errors"
R. Berns and L. Reniff, Color Research and Application, 22,
#1, 51-60 (1997) |
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Avian Ceramic Color
Standards
Avian Technologies, in partnership with
Mt. Baker Research,
has developed a complete line of ceramic color transfer standards.
These tiles are more
fully described here,
or download this
PDF for a complete description, including spectral reflectance data.
Mt. Baker Research has performed other analyses, including
a detailed gamut analysis comparing our new tiles with the Ceram
series and a few other color standards.
 Basic Colors |
 Grey Scale and Pastel Colors |
 Special Colors |
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The chart at right shows the color distribution (CIELAB b* vs a*) of
the three Avian tiles sets in comparison to the chromatic BCRA tiles.
Many of the Avian tiles extend the available gamut of colors. Also
note that the additional tiles span the gamut very well.
In
general, this
more complete coverage of color space should improve results for many
applications such device profiling and instrument characterization and evaluation.
Click on any of the charts for a larger image. |
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 Basic Set, chromatic tiles |
 Basic Set, neutral tiles |
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Grayscale & Pastel Set, chromatic tiles |
Grayscale & Pastel Set, neutral tiles |
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Special Set tiles S-1 to S-8 |
Special Set tiles S-9 to S-16 |
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Part # |
Description |
ATBC16-c8H (basic)
ATGP16-c8H (grayscale)
ATSC16-c8H (special) |
Selected tile set calibrated for reflectance @ 8° hemispherical geometry,
360-830 nm |
ATBC16-c450 (basic)
ATGP16-c450 (grayscale)
ATSC16-c450 (special) |
Selected tile set calibrated for reflectance @ 45:0c bidirectional geometry,
380-720 nm |
ATBC16-u (basic)
ATGP16-u (grayscale)
ATSC16-u (special) |
Selected tile set Uncalibrated |
Black Glass Standards
Highly polished black glass is useful as a standard for gloss, low reflectance
in directional/directional geometry, and also establishing the efficiency of the
'sphere zero' in specular excluded geometry using an integrating sphere. The black
glass standard is mounted in a Delrin Holder with cover to protect the optical surface.
The standards come calibrated for total hemispherical reflectance in 8°/hemispherical
geometry from 350-850 nm
Part # |
Description |
| BG-02C |
2.0" Black Glass Standard
Calibrated 360-830 nm 8°/hemi. Geometry |
| BG-02U |
2.0" Black Glass Standard Uncalibrated |
Reflectance Wavelength Calibration Standards
Rare Earth Oxide Standards
Designed for the calibration of UV-Vis-NIR spectrophotometers, wavelength calibration
standards display sharp absorbance peaks over much of the UV-Vis-NIR spectral range.
The mixture of REO's are chosen to give the best coverage over the wavelength range of
interest. Both UV-Vis and Vis-NIR standards are available in custom sizes and
configurations. Please contact Avian Technologies for pricing information.
UV-Vis Calibration Standards
A mixture of holmium and erbium oxides in an inert, durable, spectrally neutral matrix,
Avian Technologies Wavelength Calibration Standards are traceable to the National Research
Council Canada (NRC) and NIST. Available in 1.25" (37mm) and 2.0" (50.8mm) diameter sizes,
these standards (calibrated from 250-850 nm) are ideal for the calibration of UV-Vis
spectrophotometers.
Standards come in a Delrin holder with cover.

Part # |
Description |
| WC-FW-UVVIS-01 |
1.25" diameter |
| WC-FW-UVVIS-02 |
2.0" diameter |
Near Infrared Calibration Standards
A mixture of dysprosium, holmium, and erbium oxides in an inert,
durable, spectrally neutral matrix, Avian Technologies Wavelength
Calibration Standards are traceable to the National Research
Council Canada and NIST. Available in 1.25" (37 mm) and
2" (50.8")
diameter sizes. These standards are ideal for calibration
of Vis-NIR spectrophotometers. Standards come in a Delrin(TM)
holder with cover.

Part # |
Description |
| WC-FW-VisNIR-01 |
1.25" diameter |
| WC-FW-VisNIR-02 |
2.0" diameter |
Packed Powder Wavelength Calibration Standard

| Part # |
Description |
WC-PP-1920a-01
WC-PP-1920a-02 |
Identical to NIST SRM-1920a, this standard is a mixture
of highly purified holmium oxide, dysprosium oxide, and erbium
oxide in a hermetically sealed black anodized aluminum holder
in either 1" (25mm) or 1.5" (37 mm) optical glass
window. The standards are made in large batches and each batch
is calibrated traceable to National Research Council Canada
(NRC). |
| EWC-P1920a-02c | EWC-P1920a-02c compliments
the encapsulated grey scale standards shown above. The wavelength
standard has the same components as the National Institute of
Technology’s SRM-1920a, with a small amount of an inert, spectrally
non-absorbing binder. Unlike sintered equivalents of SRM-1920a,
this standard exhibits no peak shifting and is both durable and
stable. The spectral features are the same as WC-PP-1920a |
WCR-2066-025C (Calibrated) WCR-2066-025U (Uncalibrated)
| The reflectance version of the transmittance wavelength calibration standard, designated WCR-2066, is the
equivalent of NIST SRM-206. The standard is ideal for calibration of the
wavelength scale of both scanning and Fourier transform near-infrared spectrometers
used in the reflectance configuration. The standard consists of a 1.0” diameter
WCT-2065 filter backed with Avian Technologies Fluorilon™ FW-99 diffuse reflectance
material, in a black anodized aluminum holder designed to fit most spectrometers.
This standard is useable in the 320-2200 nm range. |
For detailed information on SRM-1920a, please see NIST Special
Publication SP-250-48 (Spectral Reflectance).
Specular Standards
Avian Technologies offers first surface specular standards with calibrations
traceable to NRC. The mirrors are first surface aluminum with a magnesium fluoride
overcoat that have been aged to enhance their long term stability. Theses standards
come in a protective holder and are available in either 2" (50.8 mm) square or 2"
(50.8 mm) diameter sizes. Calibrations are at near-normal (8°) geometry.
| Part # |
Description |
| SPFS-02S |
2" (50.8mm) square first surface aluminum mirror on glass, Calibrated traceable to NRC, 250-2500 nm |
| SPFS-01d |
1” diameter first surface aluminum mirror in holder, calibrated traceable to NRC, 250-2500 nm |

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