all_diffusers: Entrance optics

In photobiologySensors: Response Data for Light Sensors

Entrance optics

Description

A vector of names useful for extracting subsets of angular response data from the diffusers.lst object.

Usage

all_diffusers

cosine_diffusers

dome_diffusers

entrance_optics

sensor_optics

ic_optics

ideal_optics

Format

A character vector of names of members of the list of data frames.

An object of class character of length 16.

An object of class character of length 2.

An object of class character of length 0.

An object of class character of length 12.

An object of class character of length 3.

An object of class character of length 3.

Note

Irradiance measurements require diffusers or sensors with a responsivity proportional to the cosine of the angle of incidence. These described as cosine corrected. In practice no real diffusers achieve this over 180 degrees, and only the best approach the expected response over an angle of 160 to 170 degrees.

Hemispherical scalar irradiance (or hemispherical fluence rate) requires an entrance optics with a response invariant with the angle of incidence over 180 degrees in 3D. Such sensors or diffusers are seldom available off-the-shelf.

Scalar irradiance (or fluence rate) measurements require a diffuser with response invariant over 360 degrees in 3D.

Examples

all_diffusers

photobiologySensors documentation built on Oct. 24, 2023, 9:08 a.m.