Improved Facility For Brdf/Btdf Optical Scatter Measurements

Leo Davis; John G Kepros

doi:10.1117/12.939478

3 June 1987 Improved Facility For BRDF/BTDF Optical Scatter Measurements

Leo Davis, John G Kepros

Proceedings Volume 0675, Stray Radiation V; (1987) https://doi.org/10.1117/12.939478
Event: 30th Annual Technical Symposium, 1986, San Diego, United States

Abstract

A needed capability for making optical scatter measurements led the Lockheed company to design, build, and use an initial scatter measurement system. Experience with this early system revealed a number of unanticipated shortcomings. A new and improved system, designated as the BOSM Facility, was designed and built to correct the shortcomings and to improve functional capabilities. This facility will be described in this paper. The facility consists of three principle modules. First, there is a collimated light source with a variety of beam control features based on a fixed beam propagation direction. Second, there is a sample holder with three gimbal motions and a variety of controls. It is configured to facilitate and to optimize BRDF/BTDF measurements. Third, there is a PMT based photometer, with special electronic processing, mounted on a boom structure that pivots about the vertical center of the test sample. The gimbal and boom angle combinations provide the required bi-directionality. A facility computer with specialized software automatically controls illumination spot size and intensity, gimbal and boom angles, photometer measurements, and processing of raw measurement data into BRDF/BTDF output data. The software organizes these results into descriptive, tabular, and graphical reports. Other features, believed novel, are included in the facility design.

Citation Download Citation

Leo Davis and John G Kepros "Improved Facility For BRDF/BTDF Optical Scatter Measurements", Proc. SPIE 0675, Stray Radiation V, (3 June 1987); https://doi.org/10.1117/12.939478

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