DE682222C - Device for viewing films - Google Patents

Device for viewing films

Info

Publication number
DE682222C
DE682222C DEC51085D DEC0051085D DE682222C DE 682222 C DE682222 C DE 682222C DE C51085 D DEC51085 D DE C51085D DE C0051085 D DEC0051085 D DE C0051085D DE 682222 C DE682222 C DE 682222C
Authority
DE
Germany
Prior art keywords
film
field lighting
films
light source
viewing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
DEC51085D
Other languages
German (de)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HEINRICH CHANTRAINE DR MED
Original Assignee
HEINRICH CHANTRAINE DR MED
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by HEINRICH CHANTRAINE DR MED filed Critical HEINRICH CHANTRAINE DR MED
Priority to DEC51085D priority Critical patent/DE682222C/en
Application granted granted Critical
Publication of DE682222C publication Critical patent/DE682222C/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/02—Viewing or reading apparatus
    • G02B27/022—Viewing apparatus
    • G02B27/024—Viewing apparatus comprising a light source, e.g. for viewing photographic slides, X-ray transparancies

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Apparatus For Radiation Diagnosis (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)

Description

Einrichtung zur Betrachtung von Filmen Die Erfindung geht aus von einer Einrichtung zum Betrachten von Filmen, insbesondere Röntgenfilmen, mit einer -oder mehreren den Film. erhellenden Lichtquellen. Sollen starke Schwärzungen der Filme unter Benutzung der üblichen Hellfeldbeleuchtung gut aufgehellt werden, so ist die Benutzung einer starken Lichtquelle nötig. Diese hohen Lichtstärken blenden aber das. Auge des Beschauers- von den Stellen des Films her, die nur eine ,geringe Schwärzung aufweisen.Device for viewing films The invention is based on a device for viewing films, in particular X-ray films, with a -or several the film. illuminating light sources. Should strong blackening of the Films can be brightened well using the usual bright field lighting, so the use of a strong light source is necessary. These high luminous intensities are dazzling but the eye of the beholder - from the parts of the film, only a minor one Exhibit blackening.

Dieser Übelstand wird nun erfindungsgemäß dadurch beseitigt, daß eine Lichtquelle derart angeordnet ist, daß die von ihr ausgehendem Strahlen unter einem solchen Winkel auf den Film auftreffen, daß die den Film geradlinig .durchsetzenden Strahlen das Glesicht des Beschauers nicht treffen, so diaß der Film nach Art 'der Dunkelfeldbeleuchtung angestrahlt wird. Zweclanäßigerweise wird man den Film schräg von unten, z. B. in einem Winkel von q.5°, beleuchten. Es trifft bei dieser nur Licht, das vorn. Film. diffus reflektiert wird, das Auge. Versuche haben ergeben, daß in dieser Weise auf den Film auffallendes starkes Licht mittelschwarze bis tiefschwarze Stellen gut durchdringt, so daß Einzelheiten besser als bei geringer Schwärzung und Betrachtung bei Hellfeldbeleuchtung zu erkennen sind.This drawback is now eliminated according to the invention in that a Light source is arranged such that the rays emanating from it under a such an angle impinge on the film that the straight line. penetrating the film If rays do not meet the eye of the beholder, the film is like that Dark field lighting is illuminated. In the meantime, the film is slanted from below, e.g. B. at an angle of q.5 °, illuminate. It only applies to this one Light that in front. Movie. is reflected diffusely to the eye. Tests have shown that strong light striking the film in this way produces medium black to deep black Places well penetrated so that details are better than with low blackening and viewing can be seen in bright field lighting.

Für die Betrachtung der hellen Stellen des Films kann neben der Dunkelfeldbeleuchtung auch Hellfeldbeleuchtung vorgesehen sein. Es ist zweckmäßig, hierzu die Stellung der genannten Lichtquelle derart veränderlich zu machen, daß beliebig von der Dunkelfeddbeleuchtung zur Hellfeldbelauchtung und umgekehrt übergegangen werden kann.For viewing the bright areas of the film, in addition to the dark field lighting bright field lighting can also be provided. It is useful to do this the position to make the said light source so variable that any of the dark ledd lighting can be switched to bright field lighting and vice versa.

Die BetMchtungseinrichtung kann weiter in bekannter Weise mit Regelvorrichtungen zur Einstellung der gewünschten Lichtstärke versehen sein.The monitoring device can also be used in a known manner with control devices to set the desired light intensity.

Claims (2)

PATENTANSPRÜCHE: r. Einrichtung zum Betrachten von Filmen, insbesondere Röntgenfilmen, mit einer oder mehreren den Film erhellend-en Lichtquellen, dadurch gekennzeichnet, daß eine Lichtquelle derart angeordnet ist, daß die von ihr ausgehenden Strahlen unter einem solchen Winkel auf den Film auftreffen, daß die den Film geradlinig idurchsetzenden Strahlen das Gesicht des Beschauers nicht treffen, so daß der Film nach Art der Dunkelfeldbeleuchtung angestrahlt wird. PATENT CLAIMS: r. Device for viewing films, in particular X-ray films, with one or more light sources illuminating the film, thereby characterized in that a light source is arranged in such a way that the emanating from it Rays strike the film at such an angle that they make the film straight The enforcement rays do not hit the face of the beholder, so the film is illuminated according to the type of dark field lighting. 2. Einrichtung nach Anspruch t, dadurch gekennzeichnet, daß sich die Stellung dieser Lichtquelle derart ändern läßt, daß beliebig von der Dunkelfeldb.eleuchtung zur Hellfeldbeleuchtung und umgekehrt übergegangen werden kann.2. Device according to claim t, characterized in that the position of this light source change in such a way lets that any of the dark field lighting to bright field lighting and vice versa can be passed over.
DEC51085D 1935-11-24 1935-11-24 Device for viewing films Expired DE682222C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEC51085D DE682222C (en) 1935-11-24 1935-11-24 Device for viewing films

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEC51085D DE682222C (en) 1935-11-24 1935-11-24 Device for viewing films

Publications (1)

Publication Number Publication Date
DE682222C true DE682222C (en) 1939-10-10

Family

ID=7027317

Family Applications (1)

Application Number Title Priority Date Filing Date
DEC51085D Expired DE682222C (en) 1935-11-24 1935-11-24 Device for viewing films

Country Status (1)

Country Link
DE (1) DE682222C (en)

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