DIRECT MEASUREMENT OF OIL IMMERION REFLECTANCE ON MACERALS

Oil immersion reflectance of macerals is measured, home and abroad, all alike, with immersion oil at Ne²³=1.5180; otherwise the values abtained must be corrected, which is subject to complicate procedures and time-consuming. Based on the relationships of working electric current and voltage with the reflectance, a method with which the reflectance of macerals is measured at any temperature is proposed. The principles and measuring procedures of the method are presented in detail.