Floppy disk transmissivity meter

Details Floppy disk transmissivity meter Floppy disk transmissivity meter

1979-12-26

1985-12-10

Rosenberger, R. A.

Optics: measuring and testing

For light transmission or absorption

356443, 250562, G01N 2100

Patent

active

045576041

ABSTRACT:
A meter for measuring the transmissivity of a floppy disk including an oscillator for generating a sinusoidal signal, a driver and an LED, biased on by the driver and modulated by the driver responsive to the sinusoidal signal, the LED for illuminating a portion of a surface of the disk. The meter further including a photodetector optically aligned with the LED and so disposed as to develop a detected signal from illumination transmitted through the disk, a current to voltage converter, an amplifier, a state variable band pass filter, and a peak detector and amplifier for amplifying, filtering and detecting the detected signal to develop a signal suitable for driving a digital panel meter so as to directly indicate in percent the transmissivity of the disk.

REFERENCES:
patent: 2500547 (1950-03-01), Kalmus et al.
patent: 3430054 (1969-02-01), Klein
patent: 3711210 (1973-01-01), Krukonski
patent: 3807875 (1974-04-01), Fischer et al.
patent: 3832065 (1974-08-01), Sullivan et al.
patent: 3942898 (1976-03-01), Anderson

Affiliated with

Also associated with

Rating

Floppy disk transmissivity meter does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Floppy disk transmissivity meter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Floppy disk transmissivity meter will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-56229