Abstract

A process for producing calibration markers directly on the photoconductive surface of video camera tubes has been developed. This process includes the use of a Nd:YAG laser operating at 1.06 μm with a 9.5-nsec pulse width (full width at half-maximum). The laser was constrained to operate in the TEM00 spatial mode by intercavity aperturing. The use of this technology has produced an increase of up to 50 times the accuracy of geometric measurement. This is accomplished by a decrease in geometric distortion and an increase in geometric scaling. The process by which these laser-formed video calibrations are made will be discussed.

© 1983 Optical Society of America

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References

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  1. L. M. Biberman, Reticles in Electro-Optical Devices (Pergamon, New York, 1960).

Biberman, L. M.

L. M. Biberman, Reticles in Electro-Optical Devices (Pergamon, New York, 1960).

Other

L. M. Biberman, Reticles in Electro-Optical Devices (Pergamon, New York, 1960).

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Figures (5)

Fig. 1
Fig. 1

Laser system for producing video calibration marker spots utilizing a Nd:YAG laser at 1.06 μm with video camera tube in situ.

Fig. 2
Fig. 2

X-Y-Z computer-driven camera system with video tube mounted in camera. The computer used was a standard S-100 bus, Z-80 microprocessor-based commercially available system.

Fig. 3
Fig. 3

Tencor Alpha-Step profile of a typical video calibration marker spot on vidicon photoconductor surface. A spot size of ∼5 μm was used.

Fig. 4
Fig. 4

Typical damage spot on vidicon photoconductor surface.

Fig. 5
Fig. 5

Laser-induced electrocatastrophic damage on vidicon photoconductor surface.

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