Automatic baseline compensator for optical absorption spectrosco

Details Automatic baseline compensator for optical absorption spectrosco Automatic baseline compensator for optical absorption spectrosco

1975-09-29

1976-10-19

McGraw, Vincent P.

Optics: measuring and testing

Range or remote distance finding

With photodetection

226146, 2351513, 356 93, 356 96, 356 97, G01J 342

Patent

active

039867765

ABSTRACT:
Apparatus and method are disclosed enabling automatic baseline compensation in a dual beam spectrophotometer. The wavelength adjustment mechanism of the instrument monochromator, is driven in step-wise fashion by a stepping motor or the like, which also drives the tape advance means of a magnetic tape recorder, whereby the tape is advanced past a read/write head in incremental steps with the advance of the wavelength adjustment mechanism. During a calibration run an error signal is generated, which signal indicates at each discrete wavelength whether the imbalance between the reference and sample signals is in a first (or "+") direction, or in a second (or "-" direction). The information conveyed by the error signal is written as a single "+" or "-" bit upon the tape during each step-wise movement of same. The signal comprised by the stream of successive bits is also integrated, and applied to an attenuator in the reference or sample signal channel, to reduce the imbalance, thereby flattening the baseline throughout the spectrophotometer range. During the sample run the bit stream is read-out from the tape and applied to the integrator, to adjust the attenuation in the selected channel, as to duplicate the baseline adjustments effected during writing of the bit stream upon the tape.

REFERENCES:
patent: 3646331 (1972-02-01), Lord
patent: 3734621 (1973-05-01), Moody et al.

Affiliated with

Also associated with

Rating

Automatic baseline compensator for optical absorption spectrosco does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Automatic baseline compensator for optical absorption spectrosco, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Automatic baseline compensator for optical absorption spectrosco will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-99261