US5392140A — Optical device with two lens arrays with the seco…

Claim 1

Independent Claim 130 words

An optical device comprising: a first two-dimensional array of lenses having a number N of groups of lenses, each of which comprises Z lenses where Z is an integer than one, the lenses of the first array being disposed with a pitch p in a first dimension; and a second two-dimensional array of of lenses facing the first array and having a number N of lenses disposed with a pitch P in the first dimension, where P>p and each lens of the second array is associated with a respective group of lenses of the first array, the first array of lenses and the second array of lenses being arranged so that light passes through the lenses of the first array and the lenses of the second array in this order.

Claim 2

Dependent Claim 130 words

An optical device comprising: a first two-dimensional array of lenses having a number N of groups of lenses, each of which comprises Z lenses where Z is an integer than one, the lenses of the first array being disposed with a pitch p in a first dimension; and a second two-dimensional array of of lenses facing the first array and having a number N of lenses disposed with a pitch P in the first dimension, where P>p and each lens of the second array is associated with a respective group of lenses of the first array, the first array of lenses and the second array of lenses being arranged so that light passes through the lenses of the first array and the lenses of the second array in this order.

Claim 3

Dependent Claim 11 words

A device as claimed in claim 1, characterised in that P=Zp.

Claim 4

Dependent Claim 50 words

A device as claimed in claim 1 characterised in that the lenses of the first array are disposed with a pitch q in a second dimension perpendicular to the first dimension, and the lenses of the second array are disposed with a pitch Q in the second dimension, where Q>q.

Claim 5

Dependent Claim 19 words

A device as claimed in claim 3, characterised in that Q=Yq, where Y is an integer greater than one.

Claim 6

Dependent Claim 44 words

A device as claimed in claim 1, further comprising a two dimensional spatial light modulator having a plurality of light modulating cells, each of which substantially corresponds to and is substantially optically aligned with a respective one of the lense of the first array.

Claim 7

Dependent Claim 35 words

A device as claimed in claim 1, characterised in that the lenses of the first array have a common image plane which coincides with a common object plane of the lenses of the second array.

Claim 8

Dependent Claim 31 words

A device as claimed in claim 6, characterised in that a diffuser is located at the common image and object planes of the lenses of the first and second arrays, respectively.

Claim 9

Dependent Claim 33 words

A device as claimed in claim 6, characterised in that a field lens array is located at the common image and object planes of the lenses of the first and second arrays, respectively.

Claim 10

Dependent Claim 30 words

A device as claimed in claim 1, characterised by illumination means for illuminating the first array with collimated light whose angle of incidence on the first array varies with time.

Claim 11

Dependent Claim 48 words

A device as claimed in claim 9, characterised in that the illumination means comprises at least one set of sequentially illuminatable light sources arranged as a one-dimensional array in the first dimension in the focal plane of a respective collimating optical system for the at least one set.

Claim 12

Dependent Claim 31 words

A device as claimed in claim 10, characterised in that each light source of the at least one set is contiguous with the each adjacent light source of the respective set.

Claim 13

Dependent Claim 119 words

A device as claimed in claim 10, further comprising a two dimensional spatial light modulator having a plurality of light modulating cells, each of which substantially corresponds to and is substantially optically aligned with a respective one of the lenses of the first array, and characterised by control means for sequentially illuminating the light sources of the at least one set, each lens of the second array being associated with M cells of the modulator the control means being arranged to conrtol the supply of image data to the modulator so that the modulator represents M images simultaneously, with the M cells associated with each lens of the second array representing elements of different ones of the M images.

Claim 14

Dependent Claim 39 words

A device as claimed in claim 12, characterised in that the control means is arranged to supply fresh image data to the modulator substantially synchronously with changing the illumination of the light sources of the at least one set.

Claim 15

Dependent Claim 44 words

A device as claimed in claim 9, characterised in that the illumination means comprises at least one set of sequentially illuminatable light source arranged as a two-dimensionsl array in the focal plane of a respective collimating optical system for the at least one set.

Claim 16

Dependent Claim 24 words

A device as claimed in claim 1, characterised by at least one projection means for projecting z spatially interlaced images onto the first array.

Claim 17

Dependent Claim 43 words

A device as claimed in claim 15, characterised in that the at least one projection means comprises a spatial light modulator, means for illuminating the spatial light modulator, and means for projecting an image of the illuminated spatial light-modulator onto the first array.

Claim 18

Dependent Claim 34 words

A device as claimed in claim 15, characterised in that the at least one projection means comprises a plurality of projection means arranged to project onto the first array at different angles or incidence.

Claim 19

Dependent Claim 89 words

An optical device characterised by comprising: a first parallax screen having a number N of groups of apertures, each of which comprises Z apertures where Z is an integer greater than one, the apertures of the first group being disposed with a pitch p in a first dimension; and a second parallax screen having a number N of apertures disposed with a pitch P in the first dimension, where P>p and each aperture of the second screen is associated with a respective group of apertures of the first screen.

Claim 20

Dependent Claim 89 words

An optical device characterised by comprising: a first parallax screen having a number N of groups of apertures, each of which comprises Z apertures where Z is an integer greater than one, the apertures of the first group being disposed with a pitch p in a first dimension; and a second parallax screen having a number N of apertures disposed with a pitch P in the first dimension, where P>p and each aperture of the second screen is associated with a respective group of apertures of the first screen.

Claim 21

Dependent Claim 83 words

An optical device characterised by comprising: a two-dimensional array of lenses having a number N of groups of lenses, each of which comprises Z lenses where Z is an integer greater than one, the lenses being disposed with a pitch p in a first dimension; and a parallax screen having a number N of apertures disposed with a pitch P in the first dimension, where P>p and each aperture of the screen is associated with a respective group of lenses of the array.

Claim 22

Dependent Claim 83 words

An optical device characterised by comprising: a two-dimensional array of lenses having a number N of groups of lenses, each of which comprises Z lenses where Z is an integer greater than one, the lenses being disposed with a pitch p in a first dimension; and a parallax screen having a number N of apertures disposed with a pitch P in the first dimension, where P>p and each aperture of the screen is associated with a respective group of lenses of the array.

Claim 23

Dependent Claim 86 words

An optical device characterised by comprising: a parallax screen having a number N of groups of apertures, each of which comprises Z apertures where Z is an integer greater than one, the apertures of the first group being disposed with a pitch p in a first dimension; and a two-dimensional lens array having a number N of lenses disposed with a pitch P in the first dimension, where P>p and each lens of the array is associated with a respective group of apertures of the screen.

Claim 24

Dependent Claim 86 words

An optical device characterised by comprising: a parallax screen having a number N of groups of apertures, each of which comprises Z apertures where Z is an integer greater than one, the apertures of the first group being disposed with a pitch p in a first dimension; and a two-dimensional lens array having a number N of lenses disposed with a pitch P in the first dimension, where P>p and each lens of the array is associated with a respective group of apertures of the screen.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1998-02-20	1998-08-22	1999-02-21	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	2002-02-20	2002-08-22	2003-02-21	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2006-02-20	2006-08-22	2007-02-21	$7700.00	Window Closed / Lapsed

Optical device with two lens arrays with the second array pitch an integral multiple of the first array pitch

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