Multiple Cavity Square Narrow and Broad Band Optical Filters for Infrared Region Application

Shireen Mohammed Abed

doi:10.24237/djps.1302.175a

Abstract

Multiple Cavity Square Narrow and Broad Band Optical Filters for Infrared Region Application

Highlights

Thin-film filters as a rule comprise of various limits between different homogeneous media it is the impact which these limits will have on an incident wave .A filter which has area of transmission limited on either side by districts of rejection is known as a band-pass filter
Dielectric materials are preferred on the metals, because the metals have the absorption property, which increase the temperature of the coating and leads to damage it or decrease the reflectance and transmittance of the coating
Referring to Fig .2. at a wavelength λ the normal incidence spectral transmittance T(λ) of a filter placed between two semi-infinite media is equal to: T(λ)=IT(λ)/Io(λ) where, T (λ) is the light intensity transmitted at that wavelength by the filter, Io (λ) is the incident intensity of the light at the same wavelength [11] .In this paper,We design a computer program (PC) using MATLAB version (7) to calculate transmission for Optical Filters,this program depends on suggestion designs, refractive index of materials, incident angle and number of layers as shows in Flowchart A-1

Summary

Introduction

Thin-film filters as a rule comprise of various limits between different homogeneous media it is the impact which these limits will have on an incident wave .A filter which has area of transmission limited on either side by districts of rejection is known as a band-pass filter. At a wavelength λ the normal incidence spectral transmittance T(λ) of a filter placed between two semi-infinite media is equal to: T(λ)=IT(λ)/Io(λ) where , T (λ) is the light intensity transmitted at that wavelength by the filter , Io (λ) is the incident intensity of the light at the same wavelength [11] .In this paper ,We design a computer program (PC) using MATLAB version (7) to calculate transmission for Optical Filters ,this program depends on suggestion designs , refractive index of (coating) materials, incident angle and number of layers as shows in Flowchart A-1.

Results

Conclusion