DE2103876A1 - Device for casting control of unexposed photographic layers - Google Patents
Device for casting control of unexposed photographic layersInfo
- Publication number
- DE2103876A1 DE2103876A1 DE19712103876 DE2103876A DE2103876A1 DE 2103876 A1 DE2103876 A1 DE 2103876A1 DE 19712103876 DE19712103876 DE 19712103876 DE 2103876 A DE2103876 A DE 2103876A DE 2103876 A1 DE2103876 A1 DE 2103876A1
- Authority
- DE
- Germany
- Prior art keywords
- light source
- casting control
- unexposed photographic
- wavelength range
- gallium arsenide
- 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.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
- G03C1/00—Photosensitive materials
- G03C1/74—Applying photosensitive compositions to the base; Drying processes therefor
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/255—Details, e.g. use of specially adapted sources, lighting or optical systems
Landscapes
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Materials Engineering (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
Description
Vorrichtung zur Begußkontrolle unbelichteter photographischer Schichten Die Erfindung betrifft eine Vorrichtung zur Begußkontrolle unbelichteter photographischer Schichten, vorzugsweise zur Ermittlung von optisch erfaßbaren Fehlstellen in bewegten Photofilmen und -papieren unter Verwendung einer Lichtquelle als Sender und eines photoelektrischen Wandlers als Empfänger. Device for casting control of unexposed photographic layers The invention relates to a device for casting control of unexposed photographic images Layers, preferably for the determination of optically detectable flaws in moving Photographic films and papers using a light source as a transmitter and a light source photoelectric converter as a receiver.
Bei den bekannten Vorrichtungen zur optischen Fehistellenerfassung an photographischen Materialien wird das zu prüfende Material mit Lichtstrahlen (Glühlampenlicht) abgetastet und die an den Fehlstellen auftretende Streustrahlung registriert.In the known devices for optical detection of defects on photographic materials, the material to be tested is exposed to light rays (Incandescent light) and the scattered radiation occurring at the imperfections registered.
Neben diesen in Reflexion arbeitenden Anordnungen sind auch Transmissionsvorrichtungen bekannt, bei denen das zu prüfende Material optisch durchstrahlt wird. Das hindurchgelassene Licht wird auf einen photoelektrischen Wandler geleitet, der die durch die Fehlstellen entstehenden Intensitätsunterschiede als Lichtimpulse wahrnimmt und verarbeitet.In addition to these arrangements working in reflection, there are also transmission devices known, in which the material to be tested is optically irradiated. The one let through Light is directed to a photoelectric converter, which passes through the imperfections perceives and processes the resulting differences in intensity as light impulses.
Diese bekannten Vorrichtungen sind mit folgenden Nachteilen behaftet: Um eine Sekundärstrahlung ausreichender Intensität zu erhalten, sind relativ energiereiche Lichtquellen erforderlich. Weiterhin ist eine Fokussierung auf kleine Flächen nur mit relativ großer Apertur des Strahlenbündels möglich.These known devices have the following disadvantages: In order to obtain a secondary radiation of sufficient intensity, are relatively high-energy Light sources required. Furthermore, it is only possible to focus on small areas with relative large aperture of the beam possible.
Es ist auch bekannt, für die Prüfung auf Oberflächenfehler als Lichtquelle bei der Abtastung Laser einzusetzen. Vorgeschlagen sind kontinuierlich arbeitende Laser, und zwar sowohl Gaslaser als auch Festkörper- und Injektionslaser.It is also known for checking for surface imperfections as a light source to use lasers for scanning. Continuous working are suggested Lasers, both gas lasers and solid-state and injection lasers.
Für die genannten Prüfmethoden bestehen die Nachteile des Lasers in seiner geringen Lebensdauer, seinem hohen Geräte-und damit Wartungsaufwand und vor allem darin, daß es sich beim Laser um ein Gerät und nicht um ein leicht austauschbares Bauelement handelt.The disadvantages of the laser for the test methods mentioned are in its short lifespan, its high equipment and thus maintenance requirements and before all in the fact that the laser is a device and not an easily replaceable one Component acts.
Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung zur optischen Fehlersuche zu schaffen, die die erwähnten Nachteile nicht besitzt. Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Lichtquelle aus einer kontinuierlich arbeitenden Gallium-Arsenid-Lumineszenzdiode besteht.The invention is based on the object of a device for optical To create troubleshooting that does not have the disadvantages mentioned. This task is achieved according to the invention that the light source from a continuously working gallium arsenide light emitting diode.
Gallium-Arsenid-Dioden haben einen sehr geringen Leistungsverbrauch bei hoher Strahlungskonstanz. Vor allem aber zeichnen sie sich durch eine sehr lange Lebendauer und Wartungsfreiheit aus.Gallium arsenide diodes have very low power consumption with high radiation constancy. But above all, they are characterized by a very long time Lifetime and maintenance-free.
Vorzugsweise werden Gallium-Arsenid-Dioden eingesetzt, deren Strahlung im Wellenlängenbereich)&> 900 m/u liegt. Da die üblichen Photomaterialien in diesem Wellenlängenbereich unempfindlich sind, entfällt die Zwischenschaltung der sonst erforderlichen IR-Filter.Gallium arsenide diodes are preferably used, their radiation in the wavelength range) &> 900 m / u. As the usual photographic materials are insensitive in this wavelength range, the interconnection is not required the otherwise required IR filter.
Vorteilhaft wird die spektrale Empfindlichkeit des photoelektrischen Wandlers der Lichtquelle angepaßt. Bei einer besonderen Ausfuehrung der Erfindung wird die Anpassung dadurch erzielt, daß als photoelektrischer Wandler eine Siliziumdiode dient, deren maximale Empfindlichkeit im Wellenlängenbereich j'&> 850 m/u liegt.The spectral sensitivity of the photoelectric is advantageous Converter adapted to the light source. In a special embodiment of the invention the adaptation is achieved by using a silicon diode as the photoelectric converter whose maximum sensitivity in the wavelength range j '&> 850 m / u lies.
Die Erfindung kann sowohl bei Transmissions- als auch bei Reflexionsvorrichtungen verwendet werden. Bei Vorrichtungen, die in Reflexion arbeiten, befinden sich dann die GaAs-Diode und die Siliziumdiode auf einer Seite der bewegten Materialbahn, während sie bei Vorrichtungen, die in Transmission arbeiten, auf verschiedenen Seiten der Bahn angeordnet sind.The invention can be applied to both transmission and reflection devices be used. In devices that work in reflection, there are then the GaAs diode and the silicon diode on one side of the moving material web, while in devices that work in transmission they are on different sides the web are arranged.
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19712103876 DE2103876A1 (en) | 1971-01-28 | 1971-01-28 | Device for casting control of unexposed photographic layers |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19712103876 DE2103876A1 (en) | 1971-01-28 | 1971-01-28 | Device for casting control of unexposed photographic layers |
Publications (1)
Publication Number | Publication Date |
---|---|
DE2103876A1 true DE2103876A1 (en) | 1972-08-17 |
Family
ID=5797097
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19712103876 Pending DE2103876A1 (en) | 1971-01-28 | 1971-01-28 | Device for casting control of unexposed photographic layers |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE2103876A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0004330A1 (en) * | 1978-03-22 | 1979-10-03 | Agfa-Gevaert AG | Method and device for contactless continuous measurement and control of magnetic tracks on moving film strips |
-
1971
- 1971-01-28 DE DE19712103876 patent/DE2103876A1/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0004330A1 (en) * | 1978-03-22 | 1979-10-03 | Agfa-Gevaert AG | Method and device for contactless continuous measurement and control of magnetic tracks on moving film strips |
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