Browse Prior Art Database

Light Detector Matrix Arrangement

IP.com Disclosure Number: IPCOM000086768D
Original Publication Date: 1976-Oct-01
Included in the Prior Art Database: 2005-Mar-03
Document File: 2 page(s) / 32K

Publishing Venue

IBM

Related People

Winter, EM: AUTHOR

Abstract

A matrix arrangement is shown which substantially reduces the dispersion of energy of images near the edges of matrix elements.

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Light Detector Matrix Arrangement

A matrix arrangement is shown which substantially reduces the dispersion of energy of images near the edges of matrix elements.

In a prior matriK arrangement (Fig. 1), the energy of image 10 is concentrated in one element of the matrix and easily detected. However, the energy of image 11, because of optical blur, would be split between the four matrix elements forming the adjacent corner, and the image might not be detected.

The matrix arrangement of Fig. 2 reduces the amount of potential energy splitting. Image 12 would again clearly be detected. The energy of image 13 would, at most, be split three ways, increasing the chance that the image will be detected. The alternate lines of the matrix of, for example, charge-coupled device (CCD) imaging sensors are offset one-half a grid spacing to accomplish the better sensitivity. An alternate arrangement would be to offset adjacent rows one-third grid spacing.

As a means to accomplish this offset in a CCD, the grid arrangement of Fig. 2 can be obtained, as shown in Fig. 3, by alternating the transfer electrode clock voltages from line to line. Thus, the same clock voltage (phase 1) would be connected to gate 14 in line n and to gate 15 in line n+1 (offset one gate from line
n). The second clock voltage (phase 2) would be connected to gate 16 in line n and to gate 17 in line n+1 (again offset one gate from line n).

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