Patent ID: 9664607
Date: 2017-05-30
CPC Classifications: G01N

Claim:
1. A portable apparatus for estimating air quality, the portable apparatus comprising: a light source configured to emit incident light having a predetermined wavelength toward air, the emitted incident light is scattered by particles in the air to generate scattered light; a light detector configured to detect the scattered light and collect information on the scattered light; and a calculator configured to analyze the collected information on the scattered light from the light detector and to provide air quality indicator information including a size and a concentration of the particles in the air; wherein the calculator is configured to perform an arithmetic operation using an equation including variables “r”, “λ”, “n wherein the variable “r” represents a mean value of distances between the particles and the light detector, the variable “λ” represents a wavelength of the scattered light, the variable “n wherein the equation includes a first scattered light detection equation and a second scattered light detection equation; wherein the first scattered light detection equation is expressed by the following equation: wherein the second scattered light detection equation is expressed by the following equation: wherein, “I” represents intensity of the scattered light, “I