Mask for spectrophotometer photodiode array having a bridge port

Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system

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Details

250578, 356326, 356308, H01J 516, H01J 4014

Patent

active

047467932

ABSTRACT:
A photodiode assembly including a photodiode array having a linear arrangement of photodiodes, and a mask associated with the photodiode array to shade one or more selected photodiodes from incoming light of a particular frequency. The mask includes a frame provided with an elongated slot, and at least one bridge formed across the slot for shading the selected photodiode. The bridge portion is sufficiently wide to fully cover the selected photodiode and to partially cover the two adjacent photodiodes. An aperture is provided through the bridge in alignment with the selected photodiode to allow a portion of the incident light to impinge upon the selected photodiode.

REFERENCES:
patent: 3547542 (1970-12-01), Bulpitt et al.
patent: 4425501 (1984-01-01), Stauffer

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