JPS59113427A - Picture recording device - Google Patents

Abstract

PURPOSE:To obtain a superior resolving power by using an optical path splitting mirror in a roof mirror lens array, and providing an opening in a casing at a position corresponding to the optical path of luminous flux passed through the mirror and an unmagnification image sensor at an image formation position. CONSTITUTION:The slit of a hot cathode type fluorescent tube 14 is fitted to the incidence opening of the casing of the roof mirror lens array 16 and an original presser roller 13 is pressed against the top surface of its cover. A photosensitive drum 8 is provided at the image formation position of luminous flux emitted from the projection opening of the roof mirror lens array 16, and the optical path splitting mirror is used as a mirror 19'b in the roof mirror lens array 16; and the opening is provided in the casing at the position corresponding to the optical path of the luminous flux passed through the mirror and the unmagnification image sensor is provided at the image formation position. Consequently, when a copy picture is required, an electrostatic latent image formed on the photosensitive body 8 is only made into a visible picture by using a normal copying process.

Description

[Detailed Description of the Invention] Technical Field This invention relates to a copying machine, facsimile, digital copier,
The present invention relates to a multifunctional image recording device that also has the functions of a non-impact printer.

Conventional technology As a multifunctional image recording device that has both the functions of a copying machine and a facsimile, an optical path splitting mirror is inserted into the optical path on the image side of the lens, and a photoreceptor and an image sensor are placed at the imaging positions of the split optical path. Traditionally known.

FIG. 1 shows a conventional example in which an ordinary copying machine is combined with an image sensor 9 to have the function of a facsimile reading device. In this device, an original 2 placed on a contact glass 1 is illuminated by a fluorescent light 3, and an image is formed on a photoreceptor drum 8 by an exposure optical system composed of mirrors 4, 7 and an imaging lens 5. . An optical path splitting mirror 6 is disposed on the optical path between the lens 5 and the mirror 7, and a reduced image formed by the split light beam is formed on an image sensor 9 to perform a facsimile function. With this method, there is a limit to compactness due to the long optical path length of the imaging optical system.
Furthermore, the illumination light source 3 had to have a large amount of light.

In the conventional device shown in FIG. 2, a focusing light transmitter (self-focusing lens array, 5LA) 10 is used as an imaging element in order to make it compact, so it is placed on a contact glass 1. Although the distance between the original 2 and the photoreceptor drum 8 is considerably shortened, due to the nature of SLA, when used commonly for copying and facsimile reading, it is necessary to long),
The brightness is insufficient for facsimile use, and the line scanning type for facsimile has large brightness unevenness within the imaging line (main scanning direction) and large chromatic aberration. ′! ! :Although SLA with improved chromatic aberration (low dispersion) for facsimile has also appeared, because the imaging optical path length is short, an optical path splitting mirror 11 etc. is arranged and it is necessary to 12,
This has the disadvantage that the layout of the photoreceptor 8 and the copying process equipment to be placed around it becomes extremely difficult.

OBJECTS It is an object of the present invention to provide an inexpensive multifunctional image recording device that is compact, has excellent brightness, resolution, and chromatic aberration, and eliminates the above-mentioned drawbacks of conventional multifunctional image recording devices.

Configuration The present invention will now be described in detail based on embodiments shown in the drawings.

In the present invention, a new imaging element with the performance as an imaging means of an exposure/imaging optical system is used, and by taking advantage of its characteristics,
This realizes a compact multifunctional image recording device with excellent performance.

As shown in FIGS. 3 and 4, the roof mirror lens array 16 includes a lens array 17 formed by arranging micro lenses 17a with little chromatic aberration and short focal lengths in a row, and a micro roof mirror lens array 17 having reflective surfaces perpendicular to each other. A micro roof mirror array 18 consisting of mirrors 18a arranged at a pitch corresponding to the arrangement pitch of the lenses of the lens array 17, and two orthogonal plane mirrors 19a and 19b extending in the longitudinal direction of these arrays 17 and 18. The mirror block 19 is housed in a housing.

FIG. 5 shows an example of a conventional facsimile machine using a roof mirror lens array as an imaging means, in which a document 2 conveyed on a contact glass 1 by a pressing roller 13 is illuminated by a fluorescent light 3. and roof mirror lens array 16
The image is formed on the same-magnification image sensor 12 and read.

Further, FIG. 6 shows an example of a conventional copying machine using a roof mirror lens array 16. The original 2 placed on the contact glass 1 moving in the direction of the arrow is illuminated by the hot cathode type fluorescent tube 14, and the reflected light beam is imaged on the photoreceptor drum 8 by the roof mirror lens array 16, and the exposure is performed. It is done.

As shown in FIGS. 7 and 8, a hot cathode type fluorescent tube 14 used as a light source of this device has a slit section 27 interposed on the upper surface of a glass substrate 26, and a phosphor material is emitted through a light shielding layer 28. The layer 15 is formed by a method such as thick film printing, and is integrally and airtightly combined with a box-shaped cover glass 29 that covers the layer 15,
Thermionic emission filament 3 is placed in the internal space excluding air.
0 is set. Filament 3 from lead wire 31
When a voltage of 0 is applied, thermoelectrons are emitted from the filament 30 and the phosphor 15 emits light.

When viewed as a large illumination source, hot-cathode light tubes have less reduction in brightness at the end of the tube than conventional fluorescent layers, so they only need to be as long as the width of the document, allowing for smaller devices. It also has advantages over light emitting diode arrays, such as being easier to manufacture in long lengths.

In the embodiments of the present invention described below, an example is shown in which a hot cathode fluorescent tube is used as the illumination light source to achieve miniaturization and cost reduction. Of course, it is also possible to use various known ones.

In the first embodiment of the present invention shown in FIG. 9, the slit of the hot cathode type fluorescent tube 14 is aligned with the entrance port of the casing of the Dano-mirror lens array 16, and a document holding roller 13 is mounted on the upper surface of the cover. Pressure is applied. A photosensitive drum 8 is provided at the imaging position of the light beam exiting from the exit of the mirror lens array. The mirror 19b4 in the roof mirror lens array 16 is an optical path splitting mirror, and an opening is provided in one of the casings in a portion corresponding to the optical path of the light beam passing through it, and a 1-magnification imager 12 is provided at the imaging position.

Since this apparatus is constructed as described above, when it is desired to obtain a copy image, the electrostatic latent image formed on the photoreceptor 8 can be converted into a visible image using a normal copying process. When used as a facsimile, the output of the same-size sensor may be processed and transmitted.

In the second embodiment shown in FIG. 1O, the mirror 19a in the first embodiment is replaced by an optical path splitting mirror 19α', and the original 2 is placed at one object position of the incident optical path as in the first embodiment. A solid state light emitting light source array 20 is provided at another object position.

With this configuration, this apparatus can have the functions of a copying machine, a facsimile machine, and a non-impact printer. That is, how to use it as a copying machine or a facsimile is the same as in the first embodiment, and when used as a non-impact printer, each element of the solid-state light emitting light source array 20 is blinked in response to an image information signal, and the light beams are rotated in synchronization. By forming an image on the photoreceptor 8 and exposing it to light, computer output, etc. can be recorded without impact. As a solid-state light emitting source used for this purpose, an LED array, an LD array, etc. can be used.

In the third embodiment shown in FIG. 11, in place of the solid-state light emitting light source array 20 in the second embodiment, a light source 22 with low power consumption and uniform light emission, such as a fluorescent layer, is used as a light source, and the front surface of the light source 22 is A bladder shutter array 21 is used in combination. As the optical shutter array, various known types such as a liquid crystal Shack array and a PLZT array can be used.

Depending on the image information signal, each element of the optical shutter array 21 is placed in a light-blocking state or a light-transmitting state, and serves as a blinking light source.

Although a nof mirror can be used as the optical path splitting mirror used in the present invention, in the case of the second and third embodiments, the mirror 19a is It is also possible to use a half mirror for the mirror 19b and a dichromic mirror for the mirror 19b.

Effects As described above, according to the present invention, a compact and inexpensive multifunctional image reading and recording device can be obtained.

[Brief explanation of the drawing]

1 and 2 are sectional views showing an example of a conventional multifunctional image recording device, FIG. 3 is a perspective view showing the configuration of a known Danno mirror lens array, and FIG. 14 is a vertical sectional view thereof. , 5th
The figure is a sectional view showing the reading section of a conventional facsimile using a roof mirror lens array.
7 is a sectional view of a known hot cathode type fluorescent tube; FIG. 8 is a plan view thereof;
FIG. 9 is a sectional view showing a first embodiment of the invention, FIG. 10 is a sectional view showing a second embodiment of the invention, and FIG. 11 is a sectional view showing a third embodiment of the invention. 2...Original 8...Photoconductor 12...1-magnification image sensor 14...Hot cathode fluorescent tube 16 Roof mirror lens array (imaging element) 17...
Lens array 18... Roof mirror array 19a
19b... Mirrors 19a', 19b' - Optical path splitting mirror 20... Solid-state light emitting light source array 21... Optical array 22... Illumination light source Fig. 9 Fig. 10 Fig. 11

Claims (5)

[Claims] (1) Consisting of a lens array in which microlenses are arranged in a row, and a roof mirror array in which microscopic roof mirrors having reflective surfaces orthogonal to each other are arranged at a pitch corresponding to the arrangement pinch of the lenses in the lens array. an illumination light source arranged on the object side of the imaging element for illuminating a document surface; an optical path splitting mirror disposed in the optical path on the image side of the imaging element; An image recording device comprising a photoreceptor and a 1x image sensor respectively provided at imaging positions of two optical paths divided by an optical path splitting mirror. (2) The image recording apparatus according to claim 1, characterized in that a hot cathode type fluorescent tube is used as the illumination light source. (3) Consists of a lens array consisting of a row of minute lenses arranged in a row, and a rooftop mirror array consisting of minute rooftop mirrors having reflective surfaces perpendicular to VC and arranged in a pinch pattern corresponding to the arrangement pitch of the lenses in the lens array. An optical path dividing mirror is provided in each of the object-side and image-side optical paths of the imaging element, so that the divided object-side optical paths are separated from the same optical path by the imaging element. A document and a light source array consisting of a row of light sources that flash in response to an image information signal are arranged at respective length positions, and an illumination document is provided to illuminate the document, and the divided image side optical path is An image recording apparatus characterized in that a photoconductor and a 1-magnification image sensor are provided at respective image forming positions. (4) The image recording apparatus according to claim 3, wherein a solid-state light emitting light source array is used as the light source array. (5) The image recording apparatus according to claim 3, characterized in that the light source array is a combination of a light shutter array and a uniform light source that emits light over the entire length of the array.