DE1024344B - Device for marking small picture recordings on X-ray screens - Google Patents

Description

GERMAN

When using the method of X-ray screen photography for screening and To examine movement processes, it is useful and common to include the individual recordings To provide markings. For this purpose, a lettering carrier arranged in the plane of the luminescent screen is used Illuminated by a special light source and by means of the same during the X-ray exposure Optics, which are used to display the luminescent screen image, registered on the film. Here is the lighting device usually coupled with the switching devices for fluoroscopy, because this is the only way to ensure proper functioning the facility is guaranteed.

The invention shows a way in which it is possible to save a special light source, whereby also a special technical effort for the coupling between the lighting device and X-ray fluoroscopy is not required.

According to the invention is used in a device for marking Kleinbildauf took in X-ray display devices as a light source for illuminating the marking to be recorded in all Transillumination of objects of the same type bright area of the fluorescent screen that has an outside the normal beam path, consisting of lenses or mirrors or a combination of both optical system is shown in a plane in which the carrier of the marking to be copied is appropriate.

Due to the immediate, possibly slightly blurred image of the fluorescent screen point in the The level in which the carrier of the marking to be copied is located is illuminated with the same Luminance like the fluorescent screen spot. Make sure that the image-side aperture of the first optical System at least equal to or slightly larger than the object-side aperture of the camera lens is, the recording of the marking will take place under the same optical conditions as the Photography of the luminescent screen image.

With a simple or multi-part mirror system, this can be made of a perforated one, for example Index card existing carrier of the marking penetrating light deflected so that it is deflected by a in the field of view of the camera lens seems to come from the outside of the normally used field of view.

In the drawing, an embodiment according to the invention is shown schematically. It relates to an arrangement for a straight screen tube in which the X-ray screen and the Face the camera directly. Obviously, however, the invention can also be used in other constructions, Facility

for marking small image recordings on X-ray screens

Applicant:

CHF Müller Aktiengesellschaft,
Hamburg 1, Mönckebergstr. 7th

Dr. Hans Jensen, Hamburg,
has been named as the inventor

For example, those with inclined mirrors to achieve a shorter tube length work, be used. According to the invention, distractions may be necessary to achieve this glass wedges are used for the optical beam path.

1 with a screen tube is referred to, at one end of which the luminescent screen 2 is located. Him opposite the camera 3 is inserted into the tube wall. As a light source for the lighting device the fluorescent screen point to be used may be at 4, namely at a point that is in front of or behind the drawing plane. In practice, the optical systems are also not in one Can lie level, if only because it is important to arrange them outside the normal beam path.

With the help of an optical system, for example the concave mirror 5, the image of the luminescent screen point takes place 4 to level 7, where there is a perforated index card. The one enforcing this index card Light is deflected into the camera lens by means of a mirror 8. For even illumination of the entire field, a field lens 6 is used, which is the first optical system on the entrance pupil of the camera lens.

The field lens can also be saved in that the aperture angle of the imaging system 5 by the amount of the angle of view of the Camera lens increased, so that all oblique bundles of rays the object-side aperture angle of the Fully illuminate the camera lens.

Claims (5)

PATENT CLAIMS: 1. Device for marking small picture recordings in X-ray screens, characterized in that the light source for illuminating 709 879/239 the marking to be recorded is the same for all fluoroscopy of objects Kind of bright area (4) of the luminescent screen (2) is used, which has an outside of the normal Lying beam path, consisting of lenses or mirrors or a combination of both Optical system is shown in a plane (7) in which the carrier of the marking to be copied is appropriate. 2. Device according to claim 1, characterized ge ίο indicates that the light penetrating the carrier of the marking to be copied by means of a one-part or multi-part mirror system (8) is deflected so that it is in the field of vision of the camera lens seems to come from. 3. Device according to claims 1 and 2, characterized in that the uniform A field lens (6) is used to illuminate the entire field, which the first optical system on images the entrance pupil of the camera lens. 4. Device according to claims 1 to 3, characterized in that to achieve Deflections of the optical beam path glass wedges are used. 5. Device according to claims 1, 2 and 4, characterized in that the uniform Illumination of the entire marking field by enlarging the image-side aperture of the Imaging system (5) around the angle of view of the camera lens in relation to the brand image is achieved. Considered publications:
German patent specification No. 852 652. 1 sheet of drawings © 709 879/239 2.58