JPS6130163A - Projected picture copying device - Google Patents

Abstract

PURPOSE:To print a picture in real time by irradiating the picture, which is projected onto a screen by an overhead projector, from the rear face of the screen and converting photoelectrically the light transmitted selectively through the screen in accordance with the intermediate picture. CONSTITUTION:In case that the picture projected onto a screen 2 is copied, a roll 3 is turned by the start of a driving system 4 to move the screen 2, and the intermediate picture is placed in the position facing a condenser lens 7 and an electric charge coupling element 8, and the driving system 4 is stopped then. An illuminating light source 5 is lit to irradiate the intermediate picture on the screen 2 from the rear face of the screen 2. The light irradiated from the light source 5 and transmitted through the screen 2 selectively by the intermediate picture reaches the element 8 by the condenser lens 7, and the element 8 converts picture information photoelectrically in accordance with the received optical image, and the obtained electric signal is outputted to a printer 9, and the picture is copied by the printer 9.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a projection image copying apparatus using a photochromic light-sensitive material.

(Prior Art) In recent years, overhead projectors have come into practical use for image projection.

If a copy of the image projected by this overhead projector is required, it is necessary to make a copy from the film used for projection before projection. However, when an overhead projector is used at a conference, etc., text, pictures, etc. may be written on the film being projected as necessary, and in such cases, when copies are required, After using an overhead projector, it is necessary to copy the film again, and when a large number of films have been used, it is necessary to select the film to be copied.

(Object of the Invention) The present invention provides a projected image copying apparatus that can print out the projected image in real time when the image is projected by an overhead projector.

(Structure of the invention) The present invention will be explained in detail below.

In the present invention, as a photosensitive material for creating an intermediate image, a material having photochromic properties, which has the characteristic that the spectral absorption wavelength range changes when irradiated with short wavelength light and returns to its original state with long wavelength light, is used as a support. A photochromic light-sensitive material coated on top is used. Examples of substances exhibiting photochromism include inorganic compounds such as ZnS, and organic compounds such as hydrazone, osazone, and spiropyran.

Next, one embodiment of the apparatus of the present invention will be described with reference to FIG.

1 is an overhead projector for projecting an image; 12 is a screen made of a photochromic photosensitive material that is mounted between rollers 3-3; 4 is a drive system for driving the rollers 3; 5 is a light source for illumination; and 6 is a screen made of a photochromic photosensitive material. A light source for erasing an image, 7 a condensing lens, 8 a charge-coupled device, and 9 a printer.

When an image is projected by the overhead projector 1, the drive system 4 is in a stopped state, so the screen 2 made of photochromic light-sensitive material is also in a stopped state, and the image projected by the overhead projector 1 is projected onto the screen 2. An intermediate image is formed on the screen 2 by projecting the image onto the screen 2.

When copying an image projected onto the screen 2, the drive system 4 is started and the roller 3 is rotated to move the screen 2, so that the formed intermediate image faces the condensing lens 7 and the charge-coupled device 8. position and at this point the drive train 4 is stopped. Next, the illumination light source 5 is turned on to illuminate the intermediate image on the screen 2 from the back side of the screen 2. The light rays emitted by the illumination light source 5 and selectively passed through the screen 2 based on the intermediate image are collected by the condensing lens 7
The charge-coupled device 8 is reached by this. The charge-coupled device 8 photoelectrically converts image information corresponding to the received optical image and outputs the obtained electrical signal to the printer 9. Then, 1, the printer 9 performs copying corresponding to the electrical signal from the charge coupled device 8.

After the light irradiation by the illumination light source 5 is finished, the drive system 4 is restarted and the image erasing light source 6 is turned on, erasing the intermediate image formed on the screen 2 and moving the screen 2 to the overhead projector 1. is moved for a new image projection.

(Effects of the Invention) According to the projection image copying apparatus of the present invention, an image projected onto a screen by an overhang projector can be printed out in real time.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing an embodiment of the apparatus of the present invention. DESCRIPTION OF SYMBOLS 1... Overhead projector - 12... Screen made of photochromic photosensitive material, 5... Light source for illumination, 6... Light source for image erasing, 7 Lens for condensing light, 8...
・Charge-coupled device, 9...Printer Fig. 1 [

Claims (1)

[Claims] An optical system for forming an intermediate image on a photosensitive material having a photochromic photosensitive material coated on a support, an optical system for projecting the intermediate image formed on the photosensitive material onto a charge coupled device, and an optical system for projecting the intermediate image on a charge coupled device. a light source for erasing;
a printer for processing image signals from the charge coupled device.