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Notice for July 2008:
During the month of July, shipping will only be done using the "Small
Packet" method, with a typical one week shipping time. Expedited shipping using
Purolator or FedEx will not be available; expedited shipping will return in
August. Thank-you for your understanding.
Applications
Open or download these Applications Notes for detailed
examples:
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- Stable reflectance under various lights and over time
- Highly diffused surface
- Waterproof
- Thermally stable
- Not fluorescent
- Shipped in a protective phenolic case with a
transparent cap
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Nominal Target size: 1.18 inch (30 mm) diameter; 0.355
inch (9 mm) thickness
Here are typical measurements for the target (see
note); the RGB data is representative of
many common RGB spaces such as Adobe (1998), ProPhoto, and sRGB:
- L*a*b* (D50): 99.5 / -0.08 / -0.40
- RGB: (253, 254, 254)
Three specific advantages of this target are:
- A reflectance of 99% ±1% over the visible
spectrum. This translates to a Lightness value, the L* of the L*a*b*
notation, of 99.5, and RGB values around 254 for many common RGB spaces. In
comparison, many white targets for photography, sold individually or part of
a multi-colored set, display a maximum reflectance of about 96% (that would
not even be visible in the following graph!), with a L*
value of 96 and RGB coordinates around 243.
- A very neutral appearance, i.e. without a perceived
tint. Its a* and b* values, the color components of the L*a*b* notation, are
well below one (-1 or +1), which translates into more similar R, G, and B values.
- Nearly identical L*a*b* or RGB coordinates are
obtained for a wide array of white illuminants (A, C, D50, D55, D65, F3,
F11, etc.); this target thus exhibits almost no metamerism effect,
i.e. no change in perceived white (Note: the exact technical term for a
change in a single perceived color with various illuminants is
Color Inconstancy, which is
very low in this case).
These characteristics make this target a valued tool
whenever color accuracy is essential.
Note:
Measurements done with a spectrophotometer, 45°/0° geometry, Illuminant D50, 2
degree Standard Observer. The L*a*b* and reflectance values of your target may
differ from the typical values.
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Get a FREE bracelet to hold
your target
and better
Watch your White!
TM
You can even use the bracelet as a glare-free neutral-black
reference
(typical L*a*b* D50 value = 13 / 0.1 / -0.9). |
White Target, 99% reflectance, 30 mm / 1.2 in. diam., black case
Item No. N99-3009-01
$79.00 (US$)
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site for the complete list of payment methods.
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FAQ.
Other questions or problems with the purchasing process?
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