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Enhanced Night Visibility Series, Volume XVII: Phases II and III—Characterization of Experimental Vision Enhancement Systems

Publication Number: FHWA-HRT-04-148
Date: December 2005

Enhanced Night Visibility Series, Volume XVII: Phases II and III—Characterization of Experimental Vision Enhancement Systems

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LIST OF ACRONYMS AND ABBREVIATIONS

General Terms

ENV	Enhanced Night Visibility
FMVSS	Federal Motor Vehicle Safety Standards
OCH	optical center height
OEM	original equipment manufacturer
SAE	Society of Automotive Engineers
SD	standard deviation
SPD	spectral power distribution
UV–A	ultraviolet A (wavelength 315 to 400 nanometers)
VES	vision enhancement system
VOA	visually optically aligned
VOR	visually optically aligned right
VOL	visually optically aligned left

Vision Enhancement Systems


HLB	halogen (i.e., tungsten-halogen) low beam
hybrid UV–A + HLB	hybrid UV–A/visible output together with halogen low beam
three UV–A + HLB	three UV–A headlamps together with halogen low beam
five UV–A + HLB	five UV–A headlamps together with halogen low beam
HLB–LP	halogen low beam at a lower profile
HHB	halogen high beam
HOH	high output halogen
HID	high intensity discharge
hybrid UV–A + HID	hybrid UV–A/visible output together with high intensity discharge
three UV–A + HID	three UV–A headlamps together with high intensity discharge
five UV–A + HID	five UV–A headlamps together with high intensity discharge
NIR	near infrared vision system
FIR	far infrared vision system

Measurements

cd	candela
cm	centimeter
ft	feet
h	hour
km/h	kilometers per hour
lm	lumens
lx	lux
m	meters
mi/h	miles per hour
nm	nanometers
sr	steradian
W	Watts

Visible Light and Radiant Formulae

	angle of observation
	wavelength
	flux
	solid angle
A	area of the surface
E	illuminance
I	intensity
k	maximum spectral luminous efficacy in lumens per Watt
L	luminance
P()	spectral power output from source
V()	human visual spectral response

Table of Contents

Page Owner: Office of Research, Development, and Technology, Office of Safety, RDT

Scheduled Update: Archive - No Update

Technical Issues: TFHRC.WebMaster@dot.gov

Topics: research, safety

Keywords: research, safety, Halogen, Headlamp, HID, Photometry, Ultraviolet

TRT Terms: research, Safety and security, Safety, Transportation safety, Photometry, Automobile driving at night, Automobiles--Lighting--Evaluation, Optoelectronics, Night visibility, Headlamps

Updated: 04/12/2012

United States Department of Transportation - Federal Highway Administration