Image sensing device with circuit layout alignment pattern

Details Image sensing device with circuit layout alignment pattern Image sensing device with circuit layout alignment pattern

1994-02-25

1995-07-18

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

With circuit for evaluating a web, strand, strip, or sheet

2502081, G01N 2186

Patent

active

054344298

ABSTRACT:
Accurately aligning opto-electronic image sensors with respect to a beam-splitter being comprised in an image sensing device is facilitated by incorporating an alignment pattern in the conductive metal stripes of the opto-electronic image sensors. When simultaneously viewed through the input face of the beam-splitter, alignment patterns of respective opto-electronic image sensors form a combined alignment patterns showing the accuracy of the alignment of the opto-electronic image sensors. By providing differences between pitches of the alignment patterns on either side of an axis of reflection, a combined alignment pattern is obtained showing various types of alignment errors, such as horizontal or vertical translation, or rotations. Quantification of alignment errors is facilitated by making use of vernier action in the combined alignment pattern.

REFERENCES:
patent: 4712018 (1987-12-01), Stoffel et al.

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