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US 4,057,319 AGranted
Optical system using a hologram coupler
AssigneeNational Research Development Corporation
InventorsEric Albert Ash, Oliverio Delfim Dias Soares
Life of this patent
Estimating the term…
Abstract
An optical system in which individual connections are made involving the passage of light between a specific device in one array of optical devices and a specific device in another array of optical devices includes a phase halogram plate of the transmission type fixed relative to each array.
Claims14
An optical connection system comprising:
- two arrays of optical devices;
- two multiple exposure phase hologram plates each having formed therein a series of phase holograms all of the transmission type;
- and
- support means for supporting said plates respectively in fixed positions relative to said two arrays;
- the holograms having forms such that individual optical connections each of which involves the passage of light between a specific device in one array and a specific device in the other array can be made respectively via a pair of holograms in each plate, there being associated with each phase hologram a direction of polarisation which differs by 90.degree. between the holograms of a pair of holograms.
2 more elements
An optical connector consisting of an array of optical devices;
- a multiple exposure phase hologram plate having formed therein a series of phase holograms all of the transmission type;
- and support means for supporting the plate in a fixed position relative to the array;
- the phase holograms having been formed, in turn, in a plate of a material capable of forming phase holograms placed in said fixed position, by irradiating the plate with coherent light consisting of at least one beam diverging from a point coinciding with at least one of said optical devices and the plate and at least one of a series of reference beams having plane wavefronts whose axes respectively have different orientations with respect to the plate.
An optical connection system comprising:
- two arrays of optical devices;
- two multiple exposure phase hologram plates each having formed therein a series of phase holograms all of the transmission type;
- and
- support means for supporting said plates respectively in fixed positions relative to said two arrays, the holograms having forms such that individual optical connections each of which involves the passage of light between a specific device in one array and a specific device in the other array, are made respectively via one hologram in each plate.
1 more element
An optical connector comprising:
- an array of optical devices;
- a multiple exposure phase hologram plate having formed therein a series of phase holograms all of the transmission type;
- and
- support means for supporting the plate in a fixed position relative to the array;
- there being associated with each phase hologram at least one of a series of plane waves, each plane wave of the series having its axial direction at a different orientation with respect to the phase hologram plate, and the phase holograms having forms such that if the phase hologram plate is illuminated by a beam of light divergent from a point coinciding with one of the optical devices, then at least one phase hologram will transmit the light in plane-wave form.
2 more elements
A method of making a multiple exposure phase hologram plate for use in an optical connector, including the steps of:
- relatively fixing in position an array of optical devices and a plate of a material capable of forming phase holograms;
- and
- forming in said plate in turn a series of phase holograms, each phase hologram being formed by irradiating the plate with coherent light consisting of at least one beam passing between at least one of the devices in the array and the plate and at least one of a series of reference beams whose axes respectively have different orientations with respect to the plate, the reference beams having plane wavefronts and being incident on the plate on the same side as said at least one beam, whereby the simultaneous passage of at least two beams produces in the plate an interference pattern which is recorded by the plate to form a phase hologram of the transmission type.
Dependencies are inferred from the claim text.