EP0101112A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Image transfer apparatus
Assignee: Koninklijke Philips NV
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Filing: 1983-07-15
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Granted: —
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Expires: 2003-07-15
Abstract
Abstract An image magnifier for an image transfer apparatus comprises a multitude of fibres (2) arranged in laminar fibre arrays (3). The fibre arrays (3) are superimposed at the entrance face (4) and are disposed at the desired pitch from each other at the exit face (5). The fibre arrays (3) also extend at a minimal angle to the exit face (31. In the fibre arrays (3) the pitch of the fibres (2) decreases to the same pitch as that of the fibres (2) at the entrance face (4) within a minimal distance from the exit face (5), in such a way that the fibres (2) join each other substantially at the level of the orthogonal side (6) of the rectangular exit face (5). From this location the fibres (2) extend as a strip of parallel fibres in the direction perpendicular to the orthogonal side (7) of the exit face (5) and are subsequently bent towards the entrance face (4). By thus stacking the fibre arrays (3) the image magnifier has a much smaller depth at the location of these parts of the fibre arrays (3) where the pitch of the fibres (2) changes from the pitch at the exit face (5) to the pitch at the input face (4) than at the location where the fibres (2) are arranged in strips. This smaller depth is utilized in order to accommodate one or more image-display devices with associated optics and electronics. The images of the image-display devices are presented to the entrance face (4) and can be observed in magnified form at the exit face.
Inventors
- 👤 Jan Roos
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-28 10:40
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/04; G02B6/06
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
242 words
An image transfer apparatus comprising at least one image-display device and an image magnifier which comprises a bundle of fibres and has a substantially rectangular entrance face and a substantially rectangular exit face, the pitch of the fibres at the exit face being greater than that at the entrance face, characterized in that a) the fibres are arranged in laminar fibre arrays, which are substantially superimposed at the entrance face and which are arranged at the desired pitch from each other at the exit face, b) in each laminar fibre array the fibre pitch decreases, starting from the exit face, from the pitch at the exit face to the same pitch as the fibres at the entrance face, within a minimal distance, c) the location where the fibres have substantially the same pitch as at the entrance face is located at the level of a first orthogonal side of the exit face, which side extends perpendicularly to the intersection of the laminar fibre-array with the exit face, d) from the location where the fibres have substantially the same pitch as at the entrance face the fibres extend towards the entrance face, as.a strip of parallel fibres, and e) at least that part of each laminar fibre array 14 where the pitch of the fibres decreases from the pitch at the exit face to the same pitch as at the entrance face, extends at a minimal acute angle to the exit face. '
Claim 2
Dependent Claim
242 words
An image transfer apparatus comprising at least one image-display device and an image magnifier which comprises a bundle of fibres and has a substantially rectangular entrance face and a substantially rectangular exit face, the pitch of the fibres at the exit face being greater than that at the entrance face, characterized in that a) the fibres are arranged in laminar fibre arrays, which are substantially superimposed at the entrance face and which are arranged at the desired pitch from each other at the exit face, b) in each laminar fibre array the fibre pitch decreases, starting from the exit face, from the pitch at the exit face to the same pitch as the fibres at the entrance face, within a minimal distance, c) the location where the fibres have substantially the same pitch as at the entrance face is located at the level of a first orthogonal side of the exit face, which side extends perpendicularly to the intersection of the laminar fibre-array with the exit face, d) from the location where the fibres have substantially the same pitch as at the entrance face the fibres extend towards the entrance face, as.a strip of parallel fibres, and e) at least that part of each laminar fibre array 14 where the pitch of the fibres decreases from the pitch at the exit face to the same pitch as at the entrance face, extends at a minimal acute angle to the exit face. '
Claim 3
Dependent Claim
47 words
An image-transfer apparatus as claimed in Claim 1, characterized in that the entrance face is disposed in a plane which is substantially parallel to a plane perpendicular to the exit face and through a second orthogonal side of the exit face, perpendicular to the first orthogonal side.
Claim 4
Dependent Claim
42 words
An image transfer apparatus as claimed in Claim 1, characterized in that the entrance face is disposed in a plane which is substantially parallel to a plane perpendicular to the exit face and through the first orthogonal side of the exit face.
Claim 5
Dependent Claim
47 words
An image transfer apparatus as claimed in Claim 1, characterized in that one half of the fibre arrays is disposed mirror-symmetrically relative to the other half of the fibre arrays, the mid-perpendicular plane through the first orthognal side of the exit face being the plane of symmetry.
Claim 6
Dependent Claim
42 words
An image-transfer apparatus as claimed in Claim 1, 2, 3 or 4, characterized in that the exit face is formed by a face plate having a light-abeorbing surface which face plate is formed with apertures in which the fibre ends are arranged.
Claim 7
Dependent Claim
33 words
An image-transfer apparatus as claimed in Claim 5, characterized in that the face plate comprises a stack of strips having a light-absorbing surface, in which or on which the fibre ends are arranged.
Claim 8
Dependent Claim
22 words
An image-transfer apparatus as claimed in Claim 5 or 6, characterized in that the fibre ends are provided with an anti-reflection coating.
Claim 9
Dependent Claim
46 words
An image-transfer apparatus as claimed in any of the Claims 1 to 7, characterized in that at the side of the exit face the fibre ends are formed with corrugations at least in a direction parallel to one of the rectangle sides of the exit face.
Claim 10
Dependent Claim
46 words
An image-transfer apparatus as claimed in Claim 8, characrerized in that a transparent plate is arranged on the exit face, the spaces between the fibre ends and the plate being filled with a paste whose refractive index is equal to the refractive index of the plate.
Claim 11
Dependent Claim
53 words
An image-transfer apparatus as claimed in any one of the Claims 1 to 7, characterized in that a transparent plate is arranged on the exit face, which plate is formed with corrugations at the side facing the exit face, which corrugations extend parallel to one of the orthogonal sides of the exit face.
Claim 12
Dependent Claim
32 words
An image-transfer apparatus as claimed in Claim 9 or 10, characterized in that the transparent plate is provided with an anti-reflection coating on the side which is remote from the exit face.
Claim 13
Dependent Claim
37 words
An image-transfer apparatus as claimed in any one of the Claims 1 to 11, characterized in that at the entrance face the fibres are compressed in such a way that no spaces are left between the fibres.
Claim 14
Dependent Claim
23 words
An image-transfer apparatus as claimed in Claim 12, characterized in that at the entrance face the fibres are provided with a light-absorbing cladding.
Claim 15
Dependent Claim
28 words
An image-transfer apparatus as claimed in anyone of the Claims 1 to 13, characterized in that at the entrance face the fibres are provided with an anti-reflection coating.
Claim 16
Dependent Claim
30 words
An image-transfer apparatus as claimed in anyone of the Claims 1 to 14, characterized in that the apparatus comprises three picture tubes, a dichroic optical cross and a lens system.
Claim 17
Dependent Claim
26 words
An image transfer apparatus as claimed in anyone of the Claims 1 to 14, characterized in that the apparatus comprises a monochrome or colour picture tube.
Claim 18
Dependent Claim
20 words
An image-transfer apparatus as claimed in Claim 16, characterized in that the picture tube is provided with a glass-fibre face-plate.
Claim 19
Dependent Claim
27 words
An image-transfer apparatus as claimed in anyone of the Claims 1 to 14, characterized in that the image display device is formed by a controllable light modulator.
References Cited (Backward Citations)
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