Abstract: To provide a user authentication information recording medium providing a unique hologram tape. [MEANS FOR SOLVING PROBLEMS] A long flat image 310 that expresses a random number in a rectilinear state in a form of a bar code is created, and hologram original image 42 of the random number of the form of a bar code is created based on this. Hologram original image 42 is coiled around surface of drum 100 so as to create drum-shaped hologram master 10D in which the small convexes/concaves corresponding to interference fringes is formed on the surface of drum 100. Rotating drum-shaped hologram master 10D on surface of long material sheet 20S so that small convexes/concaves hologram original image 110 of surface of drum-shaped hologram master 10D is transferred on material sheet 20S repeatedly; material sheet 20S is cut out into hologram tape T providing small convexes/concaves hologram original image 110 transferred.

Abstract: A method of producing, by one hologram original plate, hologram tape accommodating a huge number of prepaid cards having mutually different specific codes. The method of producing a hologram comprises the steps of forming an oblong two-dimensional image having random numbers in a bar-code form, preparing a hologram original image based on the two-dimensional image, winding the hologram original image around the surface of a drum(110), preparing a drum-like hologram original plate(101) having minute irregularities corresponding fringes formed on the surface of the drum(110) by an etching technique, rotating the original plate(101) on the surface of a blank sheet(120) to repeatedly transfer the minute irregular hologram original image(111) on the surface of the original plate(101) onto the blank sheet(120), cutting the original image(111)-transferred blank sheet(120) into specified lengths, cutting the blank sheet(120) into length that does not exactly divide a circumferential length of the original plate(101).

Abstract: The present invention provides a method of producing hologram tapes corresponding to a large number of prepaid cards having different characteristic codes from one another, using one hologram master plate.

Abstract: A target is continuously observed and stereoscopic three-dimensional image information of the target is recorded. A transmitter unit irradiates a target with suitable radiation, an image recording unit records radiation images of the target, a rotating unit incrementally positions the target between the transmitting and image recording units, injecting means places a contrast material into the target, a memory stores a first set of reference images of the target for predetermined number of angular increments prior to injection of said contrast material and stores second set of contrast images for each angular increment of rotation of the target after injection of the contrast material, an arithmetic unit produces a set of drawn or subtractive images of the target from the stored reference and contrast image data, and an indicator unit displays two drawn images of the target that are separated by a certain angular difference so that the two images can be viewed in three dimension using a stereo-scope.

Abstract: Soft x-ray radiation, which has a lower level of radiation, is transmitted to a target (i.e., the breast). The transmitted image of the target is refined through various computerized processes. All data is stored in a multiple image memory or filed in a laser having a large memory capacity. Stored images can be viewed on a a TV monitor or recalled and interfaced to a host computer. Accordingly, the present invention is designed for mass-screening. The whole sequence of data acquisition and processing is controlled by an operation controller, which also controls the accelerating voltage of the soft x-ray radiation. The equipment is not limited for use in detecting breast cancer and is equally adapted in examining infants or others who cannot tolerate large or heavy radiation dosages.

Abstract: An x-ray photographic apparatus for medical examination has a television camera for photographing x-ray images transmitted through an object under examination, an A/D converter for converting the output from the camera into digital form, a memory for storing the digitized data, a register connected to the memory, a television monitor that permits one to see through the object, and a cathode-ray tube connected to the register for producing light signals falling on photosensitive paper. Desired ones of the images displayed on the monitor can be copied onto the photosensitive paper.