DE1941805A1 - Device for measuring the temperature of a film section located in the picture window of a projector - Google Patents
Device for measuring the temperature of a film section located in the picture window of a projectorInfo
- Publication number
- DE1941805A1 DE1941805A1 DE19691941805 DE1941805A DE1941805A1 DE 1941805 A1 DE1941805 A1 DE 1941805A1 DE 19691941805 DE19691941805 DE 19691941805 DE 1941805 A DE1941805 A DE 1941805A DE 1941805 A1 DE1941805 A1 DE 1941805A1
- Authority
- DE
- Germany
- Prior art keywords
- measuring
- projector
- temperature
- sensors
- measurement
- 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
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/14—Supports; Fastening devices; Arrangements for mounting thermometers in particular locations
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/16—Cooling; Preventing overheating
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Description
Einrichtung zur Messung der Temperatur eines im Bildfenster eines Projektors befindlichen Filmabschnitts Die Erfindung betrifft eine Einrichtung zur Messung der Temperatur eines im Bildfenster eines Projektors beitindlichen Filmabschnitts,deren Geberteil vorzugsweise in Form eines in die BildbUhne des Projektors einbringbaren Meßdiapositivs ausgebildet ist.Device for measuring the temperature of a in the image window of a Projector located film section The invention relates to a device for Measurement of the temperature of a section of film located in the image window of a projector Encoder part, preferably in the form of one that can be introduced into the image stage of the projector Measurement slide is formed.
Es ist bekannt, zur Messung der Temperatur im Bereich der Bildbühne eines Stehbildprojektors ein Meßdiapositiv zu ver wenden, in dessen Flächenmitte ein vorzugsweise als Bimetallthermometer ausgebildeter Temperaturindikator angeordnet ist, dessen Meßwert an einer transpaenten Skalenscheibe des Meßdiapositivs angezeigt wird.It is known to measure the temperature in the area of the picture stage a still image projector to use a measuring slide in the center of the surface a temperature indicator preferably designed as a bimetal thermometer is arranged whose measured value is displayed on a transparent dial of the measuring slide will.
Dieses Meßdiaspositiv ist insifern nachteilig, als es mit einem im wesentlichen mechanisch arbeitenden Temperaturindikator ausgestattet ist, dessen relativ hohe Anzeigeträgheit schnelle Aufheizungsvorgänge nicht zu analysieren gestattet.This Meßdiaspositiv is disadvantageous insifern as it is with an im essential mechanically working temperature indicator is equipped whose relatively high display inertia does not allow analyzing rapid heating processes.
Da insbesondere glasgerahmte Diapositive während der Projektion schnell aufgeheizt werden, ist dieses Meßdiapositiv nur sehr beschränkt verwendbar.Especially since glass-framed slides are fast during projection are heated, this measurement slide can only be used to a very limited extent.
Darüber hinaus ist be dem bekannten Meßdiapositiv anstelle einer für eine integrierende Messung erforderlichen gleichmäßigen Schwärzung des gesamten Bildfeldes nur gin eine vollständige Lichtabdeckung bildendes Auffangfeld in der Bildmitte vorgesehen. Damit ist eine alle Flächenbereiche des Meßdiapositivs umfassende Temperaturmessung nicht möglich, so daß mit diesem Meßdiapositiv bspw. an stärksten aufgeheizte Flächenbereiche außerhalb der Bildmitte nicht erfaßt werden.In addition, be the known measurement slide instead of one for an integrating measurement required uniform blackening of the whole The image field only gin a complete light coverage forming catching field in the Provided in the center of the picture. This means that all areas of the measurement slide are encompassing Temperature measurement not possible, so that with this measurement slide, for example, the strongest heated surface areas outside the center of the image are not recorded.
Aufgabe der Erfindung ist es, eine Einrichtung zur Messung der Temperatur eines Filmabschnitts im Bildfenster eines Projektors zu schaffen, deren Geberteil eine schnelle und integrierende Messung des gesamten vom Beleuchtungsstrahlenbündel des Projektors getroffenen Bildfeldes gestattet.The object of the invention is to provide a device for measuring the temperature to create a film section in the image window of a projector, the encoder part a fast and integrating measurement of the whole of the illuminating beam the image field hit by the projector.
Mit der Einrichtung gemäß der Erfindung wird diese aufgabe dadurch gelöst, daß im Bereich der vom Beleuchtungsstrahlenbündel arfaßten, bis auf eine geforderte Lichtdurchlässigkeit geschwärtze Fläche des Meßdiapositive mehrere thermo- elektrisch Meßfühler angeordnet sind, und die von diesen Meßfühlern ermittelten Meßwerte einer der Meßeinrichtung zugehörigen Einheit zum unterschiedlichen Auswerten, Anzeigen und Registrieren der Meßergebnisse zugeftihrt werden.With the device according to the invention this object is achieved solved that arfaßten in the area of the illuminating beam, except for one required light transmission blackened area of the measuring slide several thermo- electric Sensors are arranged, and the measured values determined by these sensors the unit belonging to the measuring device for different evaluations, displays and registering the measurement results.
Durch diese Anordnung mehrere Meßfühler ueber die gesamte Dispositivnutzfläche kann ein von den Ausleuchtungsverhältnissen der Kondensoroptik weitgehend unabhängiges Meßergebnis gewonnen und durch Serien- oder Parallelschaltung der Meßfühler der Jeweils gewonnene Meßwert den Jeweils interessierenden praktischen Belangen angepaßt werden.With this arrangement several measuring sensors over the entire dispositive usable area can be largely independent of the lighting conditions of the condenser optics Measurement result obtained and by connecting the sensors in series or in parallel The measured value obtained in each case is adapted to the practical requirements of interest in each case will.
Zur Messung dir thermischen Belastbarkeit des im Bildfenster des Projektors befindlichen Filmabschnitts ist es vorteilhaft, die über die Bildfläche verteilten thermoelektrischen meßfühler parallel zu schaltern, während zur allgemeinen Information Uber die Gesamttemperatur des im Bildfenster des Projektors befindlichen Filmabschnitts - unter Hervorhebung der geringeren Temperaturwerte - die Meßfühler in Reihe geschaltet werden.To measure the thermal resistance of the in the picture window of the projector located film section, it is advantageous to distribute it over the image area to switch thermoelectric sensors in parallel, while for general information About the total temperature of the film section in the projector's image window - with emphasis on the lower temperature values - the sensors are connected in series will.
Un mit der erfindungsgemäßen Meßeinrichtung auch eine gesonderte Messung einzelner Bereiche der dem Beleuchtungsstrahlenbündel ausgesetzten Fläche des Meßgebers zu ermöglichen, können die thermoelektrischen Meßfühler des Gebers einzeln mit der Einheit zum Auswerten, Anzeigen und Registieren des Meßergebnisses verbunden sein.A separate measurement is also carried out with the measuring device according to the invention individual areas of the surface of the transducer exposed to the illuminating beam to enable the thermoelectric sensors of the encoder individually with the Be connected to the unit for evaluating, displaying and registering the measurement result.
Vorteilhaft finden als Melfuhier Widerstände itt negatives Temperaturkoeffizienten Verwendung, die ohne Schwierigkeiten in Parallel- oder Reihenschaltung oder auch gesondert mit der nachgeschalteten Registrier- und Anzeigeeinheit der Meßein.Melfuhier resistors with negative temperature coefficients are advantageous Use that without difficulty in parallel or series connection or even separately with the downstream registration and display unit of the measuring unit.
richtung verbunden werden können Es liegt im Rahmen der Erfindung anstelle, von Widerständen alt negativem Temperaturkoeffizienten auch anders arbeitende thermoelektrische Meßfühler, bspw. Thermoelemente, in den Meßgeber einzubauendirection can be connected It is within the scope of the invention instead of resistors with old negative temperature coefficients, they also work differently thermoelectric sensors, for example thermocouples, to be built into the sensor
Claims (5)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19691941805 DE1941805A1 (en) | 1969-08-16 | 1969-08-16 | Device for measuring the temperature of a film section located in the picture window of a projector |
AT735870A AT316168B (en) | 1969-08-16 | 1970-08-12 | Device for measuring the temperature of a film section located in the picture window of a projector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19691941805 DE1941805A1 (en) | 1969-08-16 | 1969-08-16 | Device for measuring the temperature of a film section located in the picture window of a projector |
Publications (1)
Publication Number | Publication Date |
---|---|
DE1941805A1 true DE1941805A1 (en) | 1971-02-25 |
Family
ID=5743024
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19691941805 Pending DE1941805A1 (en) | 1969-08-16 | 1969-08-16 | Device for measuring the temperature of a film section located in the picture window of a projector |
Country Status (2)
Country | Link |
---|---|
AT (1) | AT316168B (en) |
DE (1) | DE1941805A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3401450A1 (en) * | 1984-01-17 | 1985-07-18 | Rudolf Dipl.-Wirtsch.-Ing. 3548 Arolsen Wilke | Coat hanger |
DE3825054A1 (en) * | 1988-07-23 | 1990-01-25 | Hans Juergen Philipp | Container for storing slides and the like |
-
1969
- 1969-08-16 DE DE19691941805 patent/DE1941805A1/en active Pending
-
1970
- 1970-08-12 AT AT735870A patent/AT316168B/en not_active IP Right Cessation
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3401450A1 (en) * | 1984-01-17 | 1985-07-18 | Rudolf Dipl.-Wirtsch.-Ing. 3548 Arolsen Wilke | Coat hanger |
DE3825054A1 (en) * | 1988-07-23 | 1990-01-25 | Hans Juergen Philipp | Container for storing slides and the like |
Also Published As
Publication number | Publication date |
---|---|
AT316168B (en) | 1974-06-25 |
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