Bidirectional Transmittance Distribution Function Of Several Infrared Materials At 3.39 Microns

Karen Sorensen; W. William Lee; Lawrence M. Scherr

doi:10.1117/12.962853

2 January 1990 Bidirectional Transmittance Distribution Function Of Several Infrared Materials At 3.39 Microns

Karen Sorensen, W. William Lee, Lawrence M. Scherr

Proceedings Volume 1165, Scatter from Optical Components; (1990) https://doi.org/10.1117/12.962853
Event: 33rd Annual Technical Symposium, 1989, San Diego, United States

Abstract

Bidirectional transmittance distribution function (BTDF) measurements were made on several infrared transmitting materials, including zinc selenide (ZnSe), fused quartz (Si02), mono and polycrystalline silicon (Si), calcium fluoride (CaF2) and spinel (MgA1204). The measurement samples were one inch in diameter, and two or three different sample thicknesses were measured for each material. BTDF measurements were made with a helium neon laser operating at 3.39 microns, at a 10° angle of incidence. Significant variations in BTDF were found among samples that were expected to have the same BTDF levels. A correlation between surface characteristics (such as surface roughness, figure and irregularity) and BTDF was found, explaining many of the BTDF variations between samples of the same thickness and material. The effects of bulk scatter on BTDF were examined through BTDF measurements on samples of different thicknesses. The measurement system is described, and data in the form of BTDF vs scatter angle and BTDF vs sample thickness are presented and compared for all five materials.

Citation Download Citation

Karen Sorensen, W. William Lee, and Lawrence M. Scherr "Bidirectional Transmittance Distribution Function Of Several Infrared Materials At 3.39 Microns", Proc. SPIE 1165, Scatter from Optical Components, (2 January 1990); https://doi.org/10.1117/12.962853

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available