Boots – shoes – and leggings
Patent
1983-11-25
1986-09-23
Sikes, William L.
Boots, shoes, and leggings
350 9610, 350 9613, 350356, 350358, 364135, 364713, 364821, 364822, 340347M, G02B 610, G05B 1508, H03M 100
Patent
active
046132040
ABSTRACT:
Apparatus (FIG. 1) receives electrical input potentials (11A-11D) representing components, e.g. coefficients (zero or one), of weighted digital input data, and provides analog optical output (12) proportional to the sum of the weighted digital values in the input data. An electrooptic waveguide (13) has four adjacent electrooptic diffractive means (14A-14D), each responsive to a separate component of the digital input data and comprising a first electrode (15A-15D) and a second electrode (16A-16D) on the waveguide (13) for temporarily changing the index of refraction when different electrical potentials are present thereon, and thus forming a Bragg grating therein with a direction of Bragg incidence in the same input direction (17) and a direction of Bragg diffraction in the same output direction (18). A coupling prism (21) directs light from a laser (20) to enter into each diffractive means (14A-14D) in the input direction (17). Binary digital circuitry (24) provides, via voltage dividers (25A- 25D), an electrical potential (at 27A-27D, 26) to each electrode (15A, etc., 16A, etc) in each diffractive means (14A, etc), such that the difference between the potentials at the electrodes (15A, 16A, etc) for each diffractive means (14A, etc) responsive to a component of the data (24) having the value of one forms a Bragg grating that diffracts in the output direction (18) a portion (Io8, Io/4, Io/2, Io) of the input light (22) having an intensity proportional to the weighted value (2.sup.-3, 2.sup.-2, 2.sup.-1, 2.sup.0) of that component of the digital input data (24).
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Dunson Philip M.
Smith Thomas B.
Verber Carl M.
Battelle (Memorial Institute)
Dunson Philip M.
Healy Brian M.
Sikes William L.
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