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STEEP3
Blackbody
Emissivity Modeling Program
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Software package STEEP3, version 1.3
(hereinafter - STEEP3), working under operating systems Windows
95/98/2000/NT, is intended for numerical modeling of effective emissivities
of blackbody cavities. Software package is applicable to design optimization
and performance assessment of blackbodies used as reference sources in
radiometry, photometry and radiating thermometry (pyrometry), as well as for
calibration of optical radiation detectors. STEEP3 is based on unique
algorithm of the Monte Carlo method described in detail in papers [1,
2, 3, 4].
The algorithm is implemented for a wide class of axially symmetric cavities
formed by rotation of polygonal line around the axis. The algorithm allows
simulation of real radiometric systems containing radiating cavity with
arbitrary axially symmetric temperature distribution, flat detector with
circular sensitive element, and up to two apertures with arbitrary
displacement of centers relative to the cavity axis. STEEP3 is delivered in
three editions (Standard, Advanced, and Professional) that differ from each
other by the range of their capabilities. The main features of new version
of STEEP3 are given below.
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Key
Features of STEEP3
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Built-in
expandable database
on optical properties of materials and coatings
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Material
or coating could be specified for one, few, or all surfaces
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Expandable
database
on initial data sets and results of numerical modeling
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Temperature
distributions along cavity generatrix
could be entered either by point-and-click method or with the
help of keyboard
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Automatically
generated printable reports with cut-in graphs and schemes
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Graphs
representing spectral reflectances, angular dependencies of diffuse to
total reflectance
ratio for materials and coatings, temperature distributions
along cavity generatrix, and spectral effective emissivity
of cavities.
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All
the graphs could be copied into clipboard, printed, and saved in a
bitmap or metafile
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Graphic
User Interface (GUI) - fully compatible with Windows 95/98/2000/NT.
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STEEP3
provides for computation of:
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spectral
and total effective emissivities for
isothermal and non-isothermal cavities, for a variety of viewing
conditions;
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radiance
temperatures
for non-isothermal cavities at
given wavelength
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radiation
temperatures
for non-isothermal cavities
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effective
reference temperatures
for non-isothermal cavities, at which a condition of equality
of spectral effective emissivity
to spectral effective emissivity
of isothermal cavity at given wavelength (or unity) is
satisfied
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Features
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STEEP3
v. 1.3
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Standard
Edition
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Advanced
Edition
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Professional
Edition
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Max.
number of segments in polygonal generatrix of cavity
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64
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256
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1024
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Max.
number of nodes in temperature distribution
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64
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256
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1024
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Max.
number of temperature distributions modeled simultaneously
(including isothermal)
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2
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5
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9
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Max.
number of spectral data modeled simultaneously
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32
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128
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512
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Specular-diffuse
model of reflection
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Isotropic
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Anisotropic
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Anisotropic
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Number
of different conditions of observation
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8
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9
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10
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Max.
number of tasks in batch
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1
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32
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128
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Reference
temperature fitting
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No
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No
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Yes
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Calculation
of spectral radiance and irradiance for perfect blackbody
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No
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Yes
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Yes
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Computing
of integrals from Planckian distribution
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No
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No
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Yes
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Calculation
of band-limited effective emissivity upon spectral responsivity curve of
pyrometer/radiometer (as additional utility BEE)
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No
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No
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Yes
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Several examples of successful application of
STEEP3 code see in [5, 6,
7, 8, 9]
and on the page Consulting Services.
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To download free demo-version of STEEP3 click the
links below. The demo version is a full-functioning program with a
pre-assigned small number of traced rays that limits the precision of Monte
Carlo modeling. Unzip downloaded file, run setup.exe, then follow screen
advices to install demo version.
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Download
Demo version of STEEP3 (8.83 MB)
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You can also download STEEP3 Users' Guide
(zipped pdf) clicking the link below.
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Download
STEEP3 User's Guide (2.49 MB)
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The
latest version of Acrobat Reader: 
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If you prefer to receive free CD with
demo-version of STEEP3, please fill in a form (Press
Here). On the disk, you
will also find selected our publications.
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To purchase STEEP3 please
contact us via e-mail at sales@virial.com.
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