Optical projection system for copying apparatus
First Claim
1. In a copying apparatus, in combination, means for supporting an original to be copied;
- means for supporting a recording medium; and
projection means operative for projecting light from the original onto the recording medium; and
means operative for effecting relative movement between the original and the projection means, the projection means comprising means operative during the relative movement for projecting onto the recording medium a gap-free image of the original by projecting onto the recording medium successive images of successive strip-shaped portions of the original, and including a plurality of optical elements at least two of which are of positive refractive power and operative for projecting an image of a strip-shaped portion of the original into an intermediate image plane and projecting the image in the intermediate image plane onto the recording medium, at least one of the optical elements comprising an element having a lenticular layer of positive refractive power and a reflective layer combined therewith to form a single structural unit, the reflective layer being oriented to introduce a fold into the light path of the projection means.
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Accused Products
Abstract
Relative movement is effected between an original to be copied and an optical projection system. During such movement, the projection system projects the image of successive strip-shaped portions of the original onto successive strip-shaped portions of a recording medium, to form a gap-free reproduction of the original. The projection system includes a plurality of optical elements at least two of which are of positive refractive power and project an image of a strip-shaped portion of the original into an intermediate image plane and from there onto the recording medium. At least one of the optical elements of the projection system comprises an element having a lenticular layer of positive refractive power and a reflective layer combined therewith.
6 Citations
16 Claims
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1. In a copying apparatus, in combination, means for supporting an original to be copied;
- means for supporting a recording medium; and
projection means operative for projecting light from the original onto the recording medium; and
means operative for effecting relative movement between the original and the projection means, the projection means comprising means operative during the relative movement for projecting onto the recording medium a gap-free image of the original by projecting onto the recording medium successive images of successive strip-shaped portions of the original, and including a plurality of optical elements at least two of which are of positive refractive power and operative for projecting an image of a strip-shaped portion of the original into an intermediate image plane and projecting the image in the intermediate image plane onto the recording medium, at least one of the optical elements comprising an element having a lenticular layer of positive refractive power and a reflective layer combined therewith to form a single structural unit, the reflective layer being oriented to introduce a fold into the light path of the projection means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 11, 12)
- means for supporting a recording medium; and
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8. In a copying apparatus, in combination, means for supporting an original to be copied;
- means for supporting a recording medium; and
projection means operative for projecting light from the original onto the recording medium; and
means operative for effecting relative movement between the original and the projection means, the projection means comprising means operative during the relative movement for projecting onto the recording medium a gap-free image of the original by projecting onto the recording medium successive images of successive strip-shaped portions of the original, and including a plurality of optical elements at least two of which are of positive refractive power and operative for projecting an image of a strip-shaped portion of the original into an intermediate image plane and projecting the image in the intermediate image plane onto the recording medium, at least one of the optical elements comprising an element having a lenticular layer of positive refractive power and a reflective layer combined therewith, the lenticular layer and reflective layer of said at least one of the optical elements being front and back layers forming a mirror objective and being so arranged that projection light projected from the original to the recording medium passes through the lenticular front layer twice. - View Dependent Claims (9, 10, 13, 14, 15)
- means for supporting a recording medium; and
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16. In a copying apparatus, in combination, means for supporting an original to be copied;
- means for supporting a recording medium; and
projection means operative for projecting light from the original onto the recording medium; and
means operative for effecting relative movement between the original and the projection means, the projection means comprising means operative during the relative movement for projecting onto the recording medium a gap-free image of the original by projecting onto the recording medium successive images of successive strip-shaped portions of the original, and including a plurality of optical elements at least two of which are of positive refractive power and operative for projecting an image of a strip-shaped portion of the original into an intermediate image plane and projecting the image in the intermediate image plane onto the recording medium, at least one of the optical elements comprising an element having a lenticular layer of positive refractive power and a reflective layer combined therewith, a first of the optical elements comprising a row of concave mirrors of positive refractive power, a second of the optical elements comprising a field-lens bar provided with a row of concave mirrors of positive refractive power operative for receiving light transmitted by the first optical element, a third of the optical elements comprising a row of concave mirrors of positive refractive power arranged to receive light transmitted by the second optical element, and further including a deflecting mirror operative for receiving the light transmitted by the third optical element and transmitting the same onto the recording medium, the first, second and third optical elements and the deflecting mirror forming a projection light path having four bends.
- means for supporting a recording medium; and
Specification