Total Luminous Flux Measurement System Using an Integrating Hemisphere Photometer
نویسندگان
چکیده
منابع مشابه
New Method for Realizing a Luminous Flux Scale using an Integrating Sphere with an External Source
A method is proposed to realize a luminous flux scale (lumens) using an integrating sphere with a known amount of flux introduced from an external source. The integrating sphere features an opening for a detector, a test lamp in its center, a baffle between the test lamp and the detector. A second opening is used to introduce flux from an external source, and is appropriately baffled from the t...
متن کاملRealization of the unit of luminous flux at the HUT using the absolute integrating-sphere method
A description of a detector-based realization of the unit of luminous flux (lumen) at the Helsinki University of Technology (HUT) is presented. The realization is based on the absolute integrating-sphere method developed at the National Institute of Standards and Technology (NIST), with some modifications. The measurement set-up consists of a 1.65 m integrating sphere, two photometers, a precis...
متن کاملRealization of NIST 1995 Luminous Flux Scale using Integrating Sphere Method
A new NIST luminous flux scale has been realized using the integrating sphere method, on which theoretical and experimental studies were previously conducted and reported. The NIST 2 m integrating sphere was modified to add an opening and an additional baffle to apply this method. Flux from an external source (1000 W quartz halogen lamp) is introduced into the sphere through a limiting aperture...
متن کاملDetector-Based Luminous Flux Calibration using the Absolute Integrating-Sphere Method
The Absolute Integrating-Sphere Method was developed and introduced by NIST for the realization of the luminous flux unit using an integrating sphere rather than a goniophotometer. The total luminous flux of a lamp inside the sphere is calibrated against the known amount of flux introduced into the sphere from the external source through a calibrated aperture. The key element of this method is ...
متن کاملFlux calibration of the Herschel -SPIRE photometer
We describe the procedure used to flux calibrate the three-band submillimetre photometer in the Spectral and Photometric Imaging Receiver instrument on the Herschel Space Observatory. This includes the equations describing the calibration scheme, a justification for using Neptune as the primary calibration source, a description of the observations and data processing procedures used to derive f...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: JOURNAL OF THE ILLUMINATING ENGINEERING INSTITUTE OF JAPAN
سال: 2010
ISSN: 0019-2341,1349-838X,2185-1506
DOI: 10.2150/jieij.94.441