Scanning system

Claim 2

A slit exposure optical system for a photographic copying apparatus in which an original is arranged in parallel with a photosensitive member in face-to-face relationship comprising: a stationary light focussing objective, a first movable reflector means for scanning an image of the original, a second movable reflector means oriented to reflect the image from said first movable reflector means to said objective, a third movable reflector means oriented to reflect the image from said objective, a fourth movable reflector means for scan-projecting the image of said original reflected from said third movable reflector means to said photosensitive member, and means for synchronously moving said first, second, third and fourth movable reflector means in the same direction along paths parallel with respect to said original and photosensitive member, wherein the rate of movement of said second movable reflector means is half that of said first movable reflector means in scanning said original, and the rate of movement of said third movable reflector means is half that of said fourth movable reflector means for scanning the image of said original on to said photosensitive member.

Claim 3

A slit exposure optical system as claimed in claim 1, wherein each of said second and third movable reflector means includes a plurality of substantially coplanar reflectors; said system further comprising a plurality of fixed reflector means arranged substantially in a plane perpendicular to the optical axis of and intersecting said objective, the number of said fixed reflector means corresponding to one half the number of said movable reflectors, and wherein the sum of the rates of movement of said reflectors of said second movable reflector means is half the rate of movement of said first movable reflector means to scan the image of the original, and the sum of the rates of movement of said reflectors of said third movable reflector means is half the rate of movement of said fourth reflector means to scan-project the image of said original on to said photosensitive member.

Claim 4

A slit exposure optical system for a copying apparatus in which an original and a photosensitive member are parallelly arranged in face-to-face relationship comprising: a stationary light focusing objective, a first movable reflector means for scanning an image of the original, a second movable reflector means for reflecting an image from said first movable reflector means to a third movable reflector means through said objective, a foUrth movable reflector means for scan-projecting the image of said original reflected from said third movable reflector means to said photosensitive member, means for synchronously moving said first, second, third and fourth movable reflector means along respective paths parallel with respect to said original and said photosensitive member, wherein the rate of movement of said second movable reflector means is half that of said first movable reflector means to scan said original, and the rate of movement of said third movable reflector means is half that of said fourth movable reflector means to scan-project an image of said original on to said photosensitive member, and wherein said first and second movable reflector means moves in the opposite direction with respect to said third and fourth movable reflector means.

Claim 5

A slit exposure optical system for a copying apparatus in which an original and a photosensitive member are parallelly arranged in face-to-face relationship comprising: a stationary light focusing objective, a first movable reflector means for scanning an image of the original, a second movable reflector means for reflecting an image from said first movable reflector means to a third movable reflector means through said objective, a foUrth movable reflector means for scan-projecting the image of said original reflected from said third movable reflector means to said photosensitive member, means for synchronously moving said first, second, third and fourth movable reflector means along respective paths parallel with respect to said original and said photosensitive member, wherein the rate of movement of said second movable reflector means is half that of said first movable reflector means to scan said original, and the rate of movement of said third movable reflector means is half that of said fourth movable reflector means to scan-project an image of said original on to said photosensitive member, and wherein said first and second movable reflector means moves in the opposite direction with respect to said third and fourth movable reflector means.

Claim 6

An optical exposure scanning device in a copying machine in which an original and a photosensitive member are positioned in transversely spaced parallel confronting relationship comprising a stationary optical objective, an original scanning first optical system including a first scanning reflector and means for moving said first scanning reflector along a longitudinal path parallel to and along a length of the original and also including a first optical unit including at least one second reflector and means for moving said second reflector along a longitudinal path in synchronism with and at a slower rate than said first reflector to provide a light path of constant length from the original to the objective with the movement of and by way of said first reflector and first optical unit, and a photosensitive member scanning second optical system including a scanning third reflector and means for moving said third reflector along a longitudinal path parallel to and along a length of the photosensitive member and also including a second optical unit including at least one fourth reflector and means for moving said fourth reflector along a longitudinal path in synchronism with and at a slower rate than said third reflector to provide a light path of constant length from the objective to the photosensitive member with the movement of and by way of said third reflector and second optical unit, said first and third reflectors being movable in synchronism.

Claim 7

An optical exposure scanning device in a copying machine in which an original and a photosensitive member are positioned in transversely spaced parallel confronting relationship comprising a stationary optical objective, an original scanning first optical system including a first scanning reflector and means for moving said first scanning reflector along a longitudinal path parallel to and along a length of the original and also including a first optical unit including at least one second reflector and means for moving said second reflector along a longitudinal path in synchronism with and at a slower rate than said first reflector to provide a light path of constant length from the original to the objective with the movement of and by way of said first reflector and first optical unit, and a photosensitive member scanning second optical system including a scanning third reflector and means for moving said third reflector along a longitudinal path parallel to and along a length of the photosensitive member and also including a second optical unit including at least one fourth reflector and means for moving said fourth reflector along a longitudinal path in synchronism with and at a slower rate than said third reflector to provide a light path of constant length from the objective to the photosensitive member with the movement of and by way of said third reflector and second optical unit, said first and third reflectors being movable in synchronism.

Claim 8

The device of claim 4 wherein said first optical unit includes one of said second reflectors moving at one half the rate of movement of said first reflector and directing light from said first reflector to said objective and said second optical unit includes one of said fourth reflectors moving at one half the rate of movement of said third reflector and directing light from said objective to said third reflector.

Claim 9

The device of claim 5 wherein said objective includes a reflecting surface and is positioned intermediate the planes of said original and photosensitive member.

Claim 10

The device of claim 5 wherein said second and fourth reflectors comprise corner reflectors.

Claim 11

The device of claim 4 including a stationary fifth reflector positioned to receive light from said first reflector by way of said first optical unit and direct it to said objective by way of said first optical unit and a stationary sixth reflector positioned to receive light from said objective by way of said second optical unit and direct it to said third reflector by way of said second optical unit, said optical units moving at one quarter the rates of movement of the respective first and third reflectors.

Claim 12

The device of claim 4 wherein said reflectors and optical units move in the same direction.

Claim 13

The device of claim 4 wherein said first reflector and said first optical unit are synchronously movable in one direction and said third reflector and second optical unit are synchronously movable in a direction opposite to that of said first reflector and first optical unit.

Claim 14

The device of claim 4 wherein the ratio of the rate of movement of the third reflector to the rate of movement of the first reflector is equal to the magnification ratio of the image on the photosensitive member to the original.