Radiant energy – Photocells; circuits and apparatus – Signal isolator
Patent
1991-09-23
1993-04-13
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Signal isolator
2502082, G02B 2700
Patent
active
052025675
ABSTRACT:
An optical information transmitting device for transmitting information on a light beam emitted by a light source, includes an electronic circuit board, and an optical input/output port mounted on the electronic circuit board. The optical input/output port has a glass substrate attached to the electronic circuit board, a first array of optical sensors for absorbing a portion of a light beam applied thereto from the light source and photoelectrically converting the portion of the light beam, and for transmitting the remainder of the light beam therethrough, and a second array of spatial light modulators for modulating the transmittance with respect to a light beam applied thereto, the first and second arrays being disposed on a surface of the glass substrate in superposed relationship to each other. A motherboard comprises a substrate and a coaxial lens array of lenses spaced at equal intervals along an optical axis on the substrate, with conjugate focusing planes of equal magnification being disposed between adjacent ones of the lenses. A method of manufacturing the motherboard is also disclosed.
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Dickinson et al., "Free-Space Optical Interconnection Scheme", Applied Optics, vol. 29, No. 14, May 10, 1990, New York, U.S. p. 2004, left column paragraphs 3-4 and FIG. 5 (Exhibit B).
Optical Computing, vol. 1359, published jointly by Steering Committee of 1990 International Topical Meeting on Optical Computing and the Japan Society of Applied Physics, printed in Japan, 1990, pp. 81-82, 160-166, 274-293, and 408-413 (papers 9D17, 10B2 through 10B4, 10H1 through 10H10, and 12B2).
Nelms David C.
Nippon Sheet Glass Co. Ltd.
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