Silicon photodiode self-calibration using white light for photometric standards

Improved Photometric Standards and Calibration Procedures at NIST

NIST has recently established a detector-based luminous intensity unit (candela, cd), which is derived from the NIST absolute cryogenic radiometer. Subsequently, the luminous flux unit (lumen, lm) and the luminance unit (cd/m2) have been established based on the detector-based candela, and now all the NIST photometric units are tied to the cryogenic radiometer. The illuminance unit is realized ...

Calibration Methods for Silicon Photodiode Pyranometers used in Rotating Shadowband Radiometers

Silicon photodiode pyranometers have been studied extensively for application in solar energy resource assessment instruments. An example is the LI-COR, Inc. 200SZ detector that is used in rotating shadowband radiometers. While excellent results have been achieved LI-COR, Inc. calibration methods are not fully disclosed and LI-COR’s stated +/5% accuracy is less than desirable. This research aim...

Photometric Standards for Raman Spectroscopy

Characterization Methods for Silicon Photodiode and Silicon Sub-Surface Properties

OF DOCTORAL DISSERTATION Author Name of the dissertation Date of manuscript Date of the dissertation Monograph Article dissertation (summary + original articles)

Self-Calibration and Neural Network Implementation of Photometric Stereo

This paper describes a new approach to neural network implementation of photometric stereo for a rotational object with non-uniform reflectance factor. Three input images are acquired under different conditions of illumination. One illumination direction is chosen to be aligned with the viewing direction. We require no separate calibration object to estimate the associated reflectance maps. Ins...