The intent of LM-77-09 is to describe measurement procedures for the determination of the luminous intensity distribution of certain lamps and luminaries using a digital camera to capture the projected light distribution from a luminaire on a screen. This measurement technique is relatively new, therefore considerable detail is provided to assist the reader in understanding the principles, requirements, and limitations involved. Digital photometry offers very high-speed data collection over a traditional goniophotometer, although typically over a restricted angular range. Many factors must be taken into account to achieve accurate digital photometry and this report addresses the most significant of these factors.
Softcover or Secure PDF: 32 pages
Publisher: Illuminating Engineering Society (2009)
SKU: IES LM-77-09
Dimensions: 8½” x 11″