physics::light Namespace Reference

Gas-related functions. More...

Namespaces
	blackbody
	Blackbody radiation functions.
	ev
	Exposure value.
	ior
	Index of refraction formulas.
	luminosity
	Luminous efficiency functions.
	phase
	Light-scattering phase functions.
	vmag
	Apparent (visual) magnitude functions.

Functions
template<class T , class UnaryOp1 , class UnaryOp2 , class InputIt >
T	luminous_efficiency (UnaryOp1 spd, UnaryOp2 lef, InputIt first, InputIt last)
	Calculates the luminous efficiency of a light source. More...
template<class T >
T	luminous_efficacy (T efficiency)
	Calculates luminous efficacy given luminous efficiency. More...
template<class T >
T	watts_to_lumens (T radiant_flux, T efficiency)
	Converts watts (radiant flux) to lumens (luminous flux). More...

Variables
template<class T >
constexpr T	max_luminous_efficacy = T(683.002)
	Maximum luminous efficacy of an ideal monochromatic source, in lumen per watt. More...

Detailed Description

Gas-related functions.

Light-related functions.

Function Documentation

luminous_efficacy()

template<class T >

T physics::light::luminous_efficacy

(

T

efficiency

)

Calculates luminous efficacy given luminous efficiency.

Parameters

efficiency

Luminous efficiency, on [0, 1].

Returns

Luminous flux, in lumens.

Definition at line 65 of file photometry.hpp.

luminous_efficiency()

template<class T , class UnaryOp1 , class UnaryOp2 , class InputIt >

T physics::light::luminous_efficiency	(	UnaryOp1	spd,
		UnaryOp2	lef,
		InputIt	first,
		InputIt	last
	)

Calculates the luminous efficiency of a light source.

Parameters

spd	Unary function object that returns spectral radiance given a wavelength.
lef	Unary function object that returns luminous efficiency given a wavelength.
first,last	Range of sample wavelengths.

Returns

Luminous efficiency, on [0, 1].

See also

physics::light::blackbody::spectral_radiance

physics::light::luminosity::photopic

Definition at line 45 of file photometry.hpp.

watts_to_lumens()

template<class T >

T physics::light::watts_to_lumens	(	T	radiant_flux,
		T	efficiency
	)

Converts watts (radiant flux) to lumens (luminous flux).

Parameters

radiant_flux	Radiant flux, in watts.
efficiency	Luminous efficiency, on [0, 1].

Returns

Luminous flux, in lumens.

Definition at line 78 of file photometry.hpp.

Variable Documentation

max_luminous_efficacy

template<class T >

constexpr T physics::light::max_luminous_efficacy = T(683.002)

constexpr

Maximum luminous efficacy of an ideal monochromatic source, in lumen per watt.

Definition at line 31 of file photometry.hpp.