Reflectance Standards

In making reflectance measurements, it is necessary to relate those measure­ments to absolute values. A spectrum that is acquired becomes meaningful only when there is a standard to which that spectrum is referenced. Typically, reflec­tance standards can provide close to ab­solute values so as to achieve highly usable and accurate results in reflectance measurements.

The most effective standard for reflec­tance measurements is the standard white. For diffuse reflectance measure­ments, the standard white provides (near) 100% reflectance, thus setting tbe needed maximum from which to relate precent reflectances. Then there are grey standards which allow determi­nations of linearity of optical detection systems. And there are black standards that provide virtually no reflectance, at a low-reflectivity of ~4%. Other standards available from Ancal include a high-reflectivity specular reflectance standard, a thin film reference standard and large surface area white targets. Our reflectance standards are described below:

Standard Whites

Standard whites are vital referenes for those involved in reflectance measure­ments. The near 100% reflectance of the whites provide a basis for most all reflectance measurements

WS-1 Diffuse Reflectance Standard


The Ocean Insights WS-1 Diffuse Reflectance Standard. The WS-1 is made of PTF, and is hydrophobic, chemically inert and the very stable, even in deep-ultraviolet applications. It is >98% reflective from 250-1500 nm and > 95% reflective from 1500-2200 nm. It comes in an anodized aluminum case and provides 32 mm of reflective area.

WS-1-SL Spectralon® White


The LabSphere Spectralon® which is a diffuse reflectance standard, made from their patented diffuse reflectance material, Spectralon®. This durable material is hydrophobic and is thermally stable to 350°C. It provides highly accurate, reproducible data. The standard, the WS-1-SL, has a 32 mm diameter area.


White Targets

White targets in various sizes are also available on special order. Contact Ancal with your requirements, especially on the size and the environmental conditions in which the target will be placed.


Gray Scale Standards

Gray Scale Standards can provide reflectance references across the full ampitude range of a spectrometer or other optical sensor. Such scales provide photometric linearity in the same way that neutral density filters are used in transmittance measurements.

Avian Technologies Fluorilon™ Gray Scale standards allow the user to calibrate their instrument over a 2 decade range of reflec­tance. The standard set consists of four standards of nominal reflectance (at 550 nm) of 2%, 10%, 50% and 99% reflectance.

Avian Technologies Fluorilon™ Gray Scale standards allow the user to calibrate their instrument over a 2 decade range of reflec­tance. The standard set consists of four standards of nominal reflectance (at 550 nm) of 2%, 10%, 50% and 99% reflectance.

STAN-SSL Specular Reflectance Standard

The Low Reflectivity Standard

The Ocean Insights STAN-SSL Low-reflectivity Specular Reflectance Standard is a black glass standard that can be used as a reference when measuring surfaces with low specular reflectance values such as thin film coatings, anti-reflective coat­ings, blocking filters and substrates. The coated surface of the STAN-SSL provides an ~4.0% reflectance across the 200-2500 nm wavelength range.

Prices

Reflectance Standards
STAN-HOLDER PN A338-MS-2Z Holder for Reflectance Standards  $450.00
STAN-SSH PN A338-MS-1 Specular Reflectance Standard, high reflectivity  554.00
STAN-SSH-NIST Specular Reflectance Standard, high reflectivity, NIST-trace  1,126.00
STAN-SSL Specular Reflectance Standard, low reflectivity  554.00
WS-1 Diffuse Reflectance Standard, PTFE  347.00
WS-1-SL Diffuse Reflectance Std, Spectralon  415.00
FWS-99-02C 2.00" diameter White Fluorilon Reflectance Standard - Calibrated  
FWS-99-02U 2.00" diameter White Fluorilon Reflectance Standard - Uncalibrated  
FSS-04-02 Set of 4 2.00" diameter Gray Scale Reflectance Standards; 2%, 99%, plus two of your choice  
FSS-08-02 Set of 8 2.00" diameter Gray Scale Reflectance Standards; 2%, 5%, 10%, 20%, 40%, 60%, 80%, 99%  

Prices are in US dollars - Prices subject to change without notice - Products are FOB Ancal, California

Order

To order, you may email an order to info@ancal.com, you may fax Ancal an order to 602-532-7018, or use the form below.

Both the Avian Technologies’ products and the Ocean Insights products can be ordered from Ancal, Inc. Ocean Insights items may be shipped from Ancal or may be shipped directly from Ocean Insights.

Please be aware that in some cases, such as in sales to new customers or on special items, pre-payment may be required.

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