Photodetector amplitude linearity

Details Photodetector amplitude linearity Photodetector amplitude linearity

1992-01-21

1993-07-20

Evans, F. L.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

2502521, G01J 302

Patent

active

052298388

ABSTRACT:
To calibrate a photodetector, a rotating disk with a slot is disposed in a light beam with decreasing speed from a defined maximum rotational speed to a defined minimum speed, while magnitudes and times of signals are read out and stored. Vernier pairs of signals occur in adjacent readout intervals, and non-vernier signals exclude the verniers. Readout times for verniers are used to estimate a preliminary function of rotations versus time. From the function are estimated an occurrence time for each pair and period of disk rotation at the time. Vernier fraction is the ratio of one signal in the pair to the sum of the pair. A time offset is the product of vernier fraction, slot fraction of the disk and the estimated period. Occurrence times corrected with the time offset are utilized to fit a corrected function of disk rotations versus time. Points of time for the non-vernier signals are determined from the corrected function, each point corresponding to disk rotations to a corresponding non-vernier signal. These points of time are employed with corresponding signals for linearly calibrating the photodetector.

REFERENCES:
"Automated High Precision Variable Aperture For Spectrophotometer Linearity Testing" by J. C. Zwinkels and D. S. Gignac, Applied Optics, 30, 1678-1687 (May 1, 1991).

Affiliated with

Also associated with

Rating

Photodetector amplitude linearity does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1764610