Photocopying – Projection printing and copying cameras – Identifying – composing – or selecting
Reexamination Certificate
1999-11-22
2001-08-21
Adams, Russell (Department: 2851)
Photocopying
Projection printing and copying cameras
Identifying, composing, or selecting
C355S041000
Reexamination Certificate
active
06278512
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to an original reading device and method, and in particular, to an original reading device and method in which an original is read by using an area sensor.
2. Description of the Related Art
Japanese Patent Application Laid-Open (JP-A) No. 7-15593 has proposed an image reading device in which a prescan section and a main scan section are provided along the conveying direction of a film. The prescan section roughly reads an image recorded on the film while the film is being conveyed, so as to obtain the basic gist of the image. In accordance with the results of prescanning by the prescan section, the main scan section adjusts the density range, the measurement time and the film conveying speed for image reading, and while the film is conveyed at the adjusted conveying speed, the main scan section reads the image of the film at a high spatial resolution and a high density resolution.
The prescan section has a light source for prescanning, plural conveying roller pairs for conveying the film, a focusing lens, and a linear CCD for prescanning. Further, the main scan section has a light source for main scanning, a filter portion, a light collecting portion, conveying roller pairs, a focusing lens, and a linear CCD for main scanning. Moreover, the scanning/conveying speed in the prescan section is the same speed as or is faster than the maximum speed in the main scan section.
However, because the above-described image reading device is structured such that the prescan section and the fine scan section are provided separately, many parts are required, and the structure of the device is complex.
As described above, the prescan section and the fine scan section are disposed along the conveying direction of the film, and the scanning/conveying speed in the prescan section is the same speed as or is faster than the maximum speed in the main scan section. Therefore, an accumulator or the like for absorbing the slack in the film, which is caused by the difference in speeds between the prescan section and the main scan section, must be provided as needed between a conveying roller pair in the prescan section and a conveying roller pair in the main scan section so that the slack portion of the film is not obstructed.
SUMMARY OF THE INVENTION
In view of the aforementioned, an object of the present invention is to provide an original reading device and method which have a simple structure and do not require consideration of the difference in speeds at the time of preliminary reading and the time of main reading.
A first aspect of the present invention is an original reading device comprising: an original reader which is formed by an arrangement of plural line sensors and which reads an original; a moving device for moving the original and the original reader relatively in a direction in which the plural line sensors are arranged; and a control device for controlling the original reader and the moving device such that preliminary reading of the original is carried out by at least one line sensor among the plural line sensors in a state in which the original and the original reader are being moved relatively and main reading of the original is carried out by the plural line sensors in a state in which the original and the original reader are stopped relatively while being intermittently moved relatively.
In a second aspect of the present invention, the original reading device according to the first aspect further comprises: a focusing lens for focusing the original onto the original reader; an adjusting device for adjusting a depth of field of the focusing lens; and a planarizing device for making planar a reading region of the original read by the original reader, wherein the controlling device controls the adjusting device and the planarizing device such that, during preliminary reading, the depth of field is made deep, and during main reading, the depth of field is made shallow and the reading region is made planar.
In a third aspect of the present invention, the image reading device according the first aspect further comprises: a first planarizing device for making planar a reading region of the original read by at least one line sensor among the plural line sensors; and a second planarizing device for making planar an entire reading region of the original read by the original reader, wherein the control device controls the first planarizing device and the second planarizing device such that, during preliminary reading, the first planarizing device makes planar the reading region read by at least one line sensor among the plural line sensors, and during main reading, the second planarizing device, instead of the first planarizing device, makes planar the entire reading region read by the original reader.
In a fourth aspect of the present invention, in the first aspect, the original is a photographic photosensitive material on which an image frame is formed and at which at least one of a perforation and a bar code which specify the position of the image frame is formed, and the control device effects control such that, during preliminary reading, at least one line sensor among the plural line sensors also reads the at least one of the perforation and the bar code, and during main reading, on the basis of information of the read at least one of the perforation and the bar code, the image frame is positioned at a reading region read by the original reader.
In a fifth aspect of the present invention, in the first aspect, the control device sets in advance at least one line sensor among the plural line sensors to be an exclusive-use line sensor, and during preliminary reading, the original is read by the exclusive-use line sensor.
In a sixth aspect of the present invention, the original reading device according to the fifth aspect further comprises: a leading end detecting sensor which is positioned at an upstream side of the original in a direction of relative movement of the original at the time of preliminary reading, and which detects a leading end of the original wherein a line sensor, which is projected onto a plane of movement of the original at a position separated by a predetermined distance from a projection position of the leading end detecting sensor onto the plane of movement of the original, is set to be the exclusive-use line sensor and the control device controls the original reader such that preliminary reading starts from the time the original moves relatively for the predetermined distance from the time the leading end of the original is detected by the leading end detecting sensor.
A seventh aspect of the present invention is an original reading device comprising: an area sensor formed from plural reading elements; a moving device for moving an original and the area sensor relatively in a predetermined direction of movement; and a control device for controlling the area sensor and the moving device such that the original is subjected to preliminary reading by some of the reading elements of the area sensor in a state in which the original and the area sensor are being moved relatively, and the original is subjected to main reading by the area sensor in a state in which the original and the area sensor are stopped relatively while being intermittently moved relatively.
In an eighth aspect of the present invention, in the seventh aspect, the original reading device further comprises: a first planarizing device for making planar a reading region of the original read by the some of the reading elements of the area sensor; and a second planarizing device for making planar an entire reading region of the original read by the area sensor, wherein the control device controls the first planarizing device and the second planarizing device such that, during preliminary reading, the first planarizing device makes planar the reading region read by the some of the reading elements of the area sensor, and, during main reading, the second planarizing device, instead of the first planarizing device, makes plana
Adams Russell
Fuji Photo Film Co. , Ltd.
Nguyen Hung Henry
Sughrue Mion Zinn Macpeak & Seas, PLLC
LandOfFree
Original reading device and method does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Original reading device and method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Original reading device and method will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2540808