Infrared Lubricant Quantitation and Dispersion Tester for Magnetic Disks
Original Publication Date: 1983-Apr-01
Included in the Prior Art Database: 2005-Feb-07
A disk analysis instrument non-destructively measures the amount of lubricant on a disk surface and measures radial and concentric distributions of concentration. The analysis technique is based on specular reflectance using Fourier Transform Infrared Spectroscopy. The disk 10 to be analyzed is mounted by hand or automation on a free-turning spindle 20 (Fig. 1). A vertically movable drive plate 30 is attached to the end of shaft 35 which is rotated by motor 40. Drive plate 30 is normally in the retracted position so as to facilitate loading disk 10 onto free-turning spindle 20. Drive plate 30 is moved from the retracted position to the drive position by solenoid 50. The free-turning spindle 20 and drive motor 40 are mounted on a carriage 60 which is supported on an optics bench 70 by roller bearings 80.