Improved Optical Performance Near The Butt Regions Of Multichip Focal Planes

R T Strong; K F Kinnard

doi:10.1117/12.945670

12 October 1988 Improved Optical Performance Near The Butt Regions Of Multichip Focal Planes

R T Strong, K F Kinnard

Proceedings Volume 0924, Recent Advances in Sensors, Radiometry, and Data Processing for Remote Sensing; (1988) https://doi.org/10.1117/12.945670
Event: 1988 Technical Symposium on Optics, Electro-Optics, and Sensors, 1988, Orlando, FL, United States

Abstract

A procedure has been developed to improve optical characteristics at the butted edges of linear multichip, focal plane, imaging arrays. The focal plane array is a backside illuminated pushbroom sensor that has been developed for application in remote sensing instruments. The gap between sensor modules making up the array represents a discontinuity in the refractive index of the substrate material through which optical radiation must pass. This discontinuity can produce vignetting and optical crosstalk in the vicinity of the butted regions. Artifacts observed in imagery obtained from a prototype multichip focal plane array suggest that the optical crosstalk in the butt region can be significant. Theory indicates the optical crosstalk can be significantly reduced by filling the gap with a material that has an index of refraction more closely matched to that of the substrate. This is supported by the ex-perimental data. The device butt edge performance with and without epoxy filler(s) has been measured and the technique(s) for epoxy application have been examined.

Citation Download Citation

R T Strong and K F Kinnard "Improved Optical Performance Near The Butt Regions Of Multichip Focal Planes", Proc. SPIE 0924, Recent Advances in Sensors, Radiometry, and Data Processing for Remote Sensing, (12 October 1988); https://doi.org/10.1117/12.945670

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KEYWORDS

Epoxies

Sensors

Charge-coupled devices

Refraction

Vignetting

Glasses

Remote sensing

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