Browse Prior Art Database

Infrared Lubricant Quantitation and Dispersion Tester for Magnetic Disks

IP.com Disclosure Number: IPCOM000045500D
Original Publication Date: 1983-Apr-01
Included in the Prior Art Database: 2005-Feb-07
Document File: 2 page(s) / 41K

Publishing Venue

IBM

Related People

Hedlund, LJ: AUTHOR

Abstract

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.

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Infrared Lubricant Quantitation and Dispersion Tester for Magnetic Disks

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. Carriage 60 is translated through the facility of lead screw 85 and stepper motor 90.

Carriage 60 allows positioning of any radial portion of the disk surface in the analysis beam which comes from the Fourier Transform Infrared Spectroscopy machine which includes light source 100, a mirror 105 to reflect the beam from the light source onto the disk surface, and a mirror 110 for reflecting the beam of light reflected from the disk surface onto a light sensor 115. With a single-beam instrument the unlubed disk is used as a reference. It is also possible to modify the arrangement, as shown in Fi...