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FLIR L ep to n w i t h R ad i o me t ry Qu i c k s ta r t Gu i d e
The information contained herein does not contain technology as defined by the EAR, 15 CFR 772, is publicly available,
and therefore, not subject to EAR. NSR (6/14/2018).
Information on this page is subject to change without notice.
102-PS245-76, Lepton with Radiometry Quickstart Guide, Rev:121
p. 1
Document Number: 102-PS245- Rev 121 76
FLIR L ep to n w i t h R ad i o me t ry Qu i c k s ta r t Gu i d e
The information contained herein does not contain technology as defined by the EAR, 15 CFR 772, is publicly available,
and therefore, not subject to EAR. NSR (6/14/2018).
Information on this page is subject to change without notice.
102-PS245-76, Lepton with Radiometry Quickstart Guide, Rev:121
p. 2
Revision History
Version
Date
Comments
100
December 8, 2016
Initial Release
110
June 16, 2017
Updated to include equations required for calibration herein
120
June 16, 2018
Corrected equation for calculation of windows transmission
121
August 28, 2018
Updated EAR statement
Table of Contents
Revision History ............................................................................................................ 2
Scope .................................................................................................................................. 3
Compensation for Final System Integration ....................................................... 3
Background ................................................................................................................ 3
Application .................................................................................................................. 4
Requirements 4........................................................................................................
Procedure ............................................................................................................... 4
FLIR L ep to n w i t h R ad i o me t ry Qu i c k s ta r t Gu i d e
The information contained herein does not contain technology as defined by the EAR, 15 CFR 772, is publicly available,
and therefore, not subject to EAR. NSR (6/14/2018).
Information on this page is subject to change without notice.
102-PS245-76, Lepton with Radiometry Quickstart Guide, Rev:121
p. 3
Scope
This document describes a simplified subset of the parameter updates necessary for integrating
the Lepton with Radiometry configuration (80x60 part number: 500-0763- into a final 01)
system For a more in-depth discussion of the radiometry background principles and sources of .
error, please refer to the Advanced Radiometry Application Note (document number 102-
PS245-75).
Compensation for Final System Integration
Background
The Lepton with Radiometry is calibrated at the factory for accurate measurement of a scene
with 100% emissivity in close proximity to the camera. Factors such as scene emissivity and
unwanted signal from sources other than the scene will influence the measurement accuracy of
a real scene. Compensation for the factors that enter as a result of integrating the Lepton in a
complete system is the subject of this document.
The Lepton with Radiometry calibrated values and parameter defaults assume no window or
100% window transmission, but typical integrated systems include a window which needs to be
characterized to achieve accurate radiometry The window must be transmissive in the long .
wave infrared (LWIR) band, specifically 7- . Typical materials include Ge, ZnS, and Si where 14µm
the average transmission across the LWIR band would be provided by the window supplier or
preferably characterized for best accuracy as described in the subsequent section. The
temperature of the window should also be characterized to determine the additional irradiance
it adds to the system. In use, the window temperature will vary as a function of the
environment temperature which can be compensated for by either run-time measurement (i.e.
including a temperature sensor) or simply characterizing the value at a single temperature and
relating it to the temperature sensors included in the Lepton module.
For best radiometric accuracy, it is recommended that the window transmission and window
temperature are characterized on a small sample set in the final system to be applied to all
systems using the same configuration. The window transmission should be characterized first,
then the window temperature at a single ambient temperature point at a minimum. Note that
the window temperature measurement error is high when the window transmission is very
high, but in this case the impact of this parameter is lower. The following section discusses the
procedure for characterizing the window parameters which are effectively correcting all gain
Produktspecifikationer
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| Kategori: | ej kategoriserat |
| Modell: | Lepton |
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