ASTM E167-96 PDF

1.1 Goniophotometry is a general procedure for evaluating the manner in which an object or a material geometrically distributes the unabsorbed portion of incident light, whether by reflection or by transmission.

1.2 The two former, essentially identical, Recommended Practices for Goniophotometry, E 166 for transmitted light and E 167 for reflected light, are now combined in this one practice.

1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use .