DE736376C - Film gap observation - Google Patents
Film gap observationInfo
- Publication number
- DE736376C DE736376C DEK159820D DEK0159820D DE736376C DE 736376 C DE736376 C DE 736376C DE K159820 D DEK159820 D DE K159820D DE K0159820 D DEK0159820 D DE K0159820D DE 736376 C DE736376 C DE 736376C
- Authority
- DE
- Germany
- Prior art keywords
- film gap
- observation
- recording
- recording medium
- glass plate
- 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
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/002—Recording, reproducing or erasing systems characterised by the shape or form of the carrier
- G11B7/003—Recording, reproducing or erasing systems characterised by the shape or form of the carrier with webs, filaments or wires, e.g. belts, spooled tapes or films of quasi-infinite extent
- G11B7/0032—Recording, reproducing or erasing systems characterised by the shape or form of the carrier with webs, filaments or wires, e.g. belts, spooled tapes or films of quasi-infinite extent for moving-picture soundtracks, i.e. cinema
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
- G11B7/085—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam into, or out of, its operative position or across tracks, otherwise than during the transducing operation, e.g. for adjustment or preliminary positioning or track change or selection
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
Landscapes
- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
Description
Filmspaltbeobachtung Bei der Verwendung von unsichtbarem, z. B. ultraviolettem Licht für die Tonaufzeichnung bringt. die Kontrolle des Filmspaltes, der durch die Optik auf dem Film erzeugt wird, Schwierig$eiten mit sich, da das von dem Filmspalt reflektierte Licht nicht ohne weiteres sichtbar ist. Um diesen Mangel zu beseitigen, wird gemäß der Erfindung vorgeschlagen, bei Tonaufzeichnungsvorrichtungen mit unsichtbarem Licht für die Spaltbeobachtung einen Aufzeichnungsträger zu verwenden, der über seine ganze Länge oder stellenweise mit einem fluoreszierenden Stoff versehen ist. An den Stellen, an denen der fluoreszierende Stoff aufgetragen ist, erscheint der Filmspalt leuchtend, so daß. er ohne weiteres, z. B. mit einem Objektiv, beobachtet werden kann. Der fluoreszierende Stoff kann hierbei so dünn aufgetragen werden, daß er den Aufzeichnungsvorgang nicht beeinträchtigt; es ist aber auch möglich, die Aufzeichnung an bestimmten Stellen zu unterbrechen und den Film nur an diesen Stellen mit einer Fluoreszenzschicht zu versehen, so daß die erforderlichen Einstellungen möglich sind. Die Erfindung kann beispielsweise bei ultraviolettem Aufzeichnungslicht verwendet werden, das z. B. aus dem Aufzeichnungsstrahl durch eine in ihm befindliche ultraviolettdurchlässige Glasplatte ausgefiltert wird und vom Aufzeichnungsträger reflektiert, vorbeigehend an der Glasplatte, auf eine Beobachtungsvorrichtung fällt. Das vom Aufzeichnungsträger reflektierte Licht kann aber auch hierbei von der Glasplatte auf die Beobachtungseinrichtung refi'ektiert werden.Film gap observation When using invisible, e.g. B. ultraviolet Brings light for sound recording. control of the film gap created by the Optics generated on the film are difficult because of the film gap reflected light is not readily visible. To remedy this deficiency, is proposed according to the invention, in sound recording devices with invisible Light to use a recording medium for the gap observation, which is about its entire length or in places is provided with a fluorescent material. The will appear in the places where the fluorescent material is applied Film gap shining so that. he readily, z. B. with a lens observed can be. The fluorescent material can be applied so thinly that that it does not interfere with the recording process; but it is also possible to interrupt the recording at certain points and the film only at these Provide places with a fluorescent layer, making the necessary settings possible are. For example, the invention can be applied to ultraviolet recording light be used, the z. B. from the recording beam through one located in it ultraviolet-permeable glass plate is filtered out and removed from the recording medium reflected, past the glass plate, falls on an observation device. However, the light reflected from the recording medium can also be released from the glass plate in this case be reflected on the observation device.
Aufzeichnungsträger mit fluoreszierender Schicht sind bereits bekannt. Bei diesen bekannten Aufzeichnungsträgern dient diese Schicht aber für die Registrierung der Töne, während es sich bei der vorliegenden Erfindung um die Kontrolle des Filmspaltes handelt. Es ist ferner bekannt, daß unsichtbares Licht auf einem fluoreszierenden oder phosphoreszierenden Schirm sichtbar gemacht werden kann. Dieses bekannte physikalische Prinzip wird bei der vorliegenden Erfindung in besonders vorteilhafter Weise ausgenutzt, indem eine solche Schicht für die Filmspaltbeobachtung auf dem Aufzeichnungsträger vorgesehen wird, so daßa bei günstigen Kontrollichtverhältnissen die Kontrolle mit üblichen Beobachtung, seinr ichtung en durchgeführt werden kann.Recording media with a fluorescent layer are already known. In the case of these known recording media, however, this layer is used for registration of tones, while the present invention is about controlling the film gap acts. It is also known that invisible light on a fluorescent or phosphorescent screen can be made visible. This well-known physical Principle is used in the present invention in a particularly advantageous manner, by such a layer for film gap observation on the recording medium intended is, so that a control with normal light conditions when the control light conditions are favorable Observation, setup can be done.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEK159820D DE736376C (en) | 1937-07-29 | 1937-07-29 | Film gap observation |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEK159820D DE736376C (en) | 1937-07-29 | 1937-07-29 | Film gap observation |
Publications (1)
Publication Number | Publication Date |
---|---|
DE736376C true DE736376C (en) | 1943-06-16 |
Family
ID=7254096
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEK159820D Expired DE736376C (en) | 1937-07-29 | 1937-07-29 | Film gap observation |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE736376C (en) |
-
1937
- 1937-07-29 DE DEK159820D patent/DE736376C/en not_active Expired
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