DE2339079A1 - Heat control system for epidiascope - uses combination of heat reflector and absorber between lamp and stage - Google Patents

Heat control system for epidiascope - uses combination of heat reflector and absorber between lamp and stage

Info

Publication number
DE2339079A1
DE2339079A1 DE2339079A DE2339079A DE2339079A1 DE 2339079 A1 DE2339079 A1 DE 2339079A1 DE 2339079 A DE2339079 A DE 2339079A DE 2339079 A DE2339079 A DE 2339079A DE 2339079 A1 DE2339079 A1 DE 2339079A1
Authority
DE
Germany
Prior art keywords
heat
lamp
stage
original
epidiascope
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
Application number
DE2339079A
Other languages
German (de)
Inventor
Auf Nichtnennung Antrag
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.)
Liesegang Fa Ed
Original Assignee
Liesegang Fa Ed
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 Liesegang Fa Ed filed Critical Liesegang Fa Ed
Priority to DE2339079A priority Critical patent/DE2339079A1/en
Publication of DE2339079A1 publication Critical patent/DE2339079A1/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • G03B21/06—Projectors or projection-type viewers; Accessories therefor affording only episcopic projection

Abstract

An optical element consisting of a heat absorbing glass is fitted between the lamp and the stage. The surface of the element facing the lamp is additionally coated with a heat reflecting layer. A similar heat reflecting coating is applied to the glass pressure plate used to hold the original flap. The design reduces the temperature of the stage and allows an original to be projected for prolonged periods without causing deterioration from excessively high temperatures. Most of the infra red radiation is removed from the light striking the original, leaving only visible light.

Description

Beleuchtungs-System für EpiskopeLighting system for episcopes

Die Erfindung betrifft die Beleuchtungs-Einrichtung in einen Episkop, die die Temperatur auf dem Vorlagenfeld durch Verwendung von wärmereflektierenden Schichten günstig beeinflußt.The invention relates to the lighting device in an episcope, which the temperature on the template field favorably influenced by the use of heat-reflecting layers.

Es sind Geräte bekannt, bei denen das Vorlagenfeld mit Luft oder einem anderen Medium gekühlt wird. Außerdem sind noch Geräte bekannt, die mit Absorptionsfiltern ausgerüstet sind, die verhindern, daß die Wärmestrahlen direkt von der Lampe auf das Vorlagenfeld fallen.There are devices known in which the template field with Air or another medium is cooled. In addition, devices are also known which are equipped with absorption filters that prevent the heat rays fall directly from the lamp onto the template field.

Aufgabe der Erfindung war es, die Nachteile des Absorptionsfilters zu beseitigen. The object of the invention was to eliminate the disadvantages of the absorption filter.

Durch Absorption heizt sich das Filter auf und strahlt Wärme in Richtung des Vorlagenfeldes ab, wodurch die Temperatur auf dem Vorlagenfeld zusätzlich erhöht wird.The filter heats up through absorption and radiates heat in the direction of the template field, which causes the Temperature on the template field is also increased.

Durch die Verwendung einer wärmereflektierenden Schicht 1 auf einem durchsichtigen Träger 2, werden die Wärmestrahlen der Lampe 3 reflektiert. Dadurch wird das Aufheizen des Trägers 2 verhindert, so daß keine zusätzliche Wärmestrahlung auf das Vorlagenfeld 4 erfolgt. Die reflektierte Wärme wird durch den Lüfter 5 oder durch die Kaminwirkung im Gerät abgeführt.By using a heat reflective layer 1 on a transparent carrier 2, the heat rays of the lamp 3 are reflected. This prevents the Prevents carrier 2, so that no additional heat radiation occurs on the template field 4. The reflected Heat is dissipated by the fan 5 or by the chimney effect in the device.

509807/0582509807/0582

Claims (4)

Ansprüche;Expectations; flJ Episkop dadurch gekennzeichnet, daß ein oder mehrere optische Elemente (2) zwischen Vorlagenfeld (4) und Lampe (3) angebracht werden, die mit wärmereflektierenden Schichten (1) versehen sind. FlJ episcope, characterized in that one or more optical elements (2) are attached between the template field (4) and lamp (3), which are provided with heat-reflecting layers (1). 2. Episkop dadurch gekennzeichnet, daß eine Kombination von wärmeabsorbierenden und wärmereflektierenden Elementen zwischen Lampe (3) und Vorlagenfeld (4) angebracht sind.2. episcope characterized in that a combination of heat-absorbing and heat-reflecting elements between lamp (3) and template field (4) attached are. 3. Episkop nach Anspruch 2 dadurch gekennzeichnet, daß das wärmeabsorbierende optische Element (2) gleichzeitig der Träger der wärmereflektierenden Schicht (1) ist.3. Episcope according to claim 2, characterized in that the heat-absorbing optical element (2) at the same time is the support of the heat-reflecting layer (1). 4. Episkop dadurch gekennzeichnet, daß eine wärmereflektierende Schicht auf der Andruckscheibe angebracht ist.4. episcope characterized in that a heat reflective Layer is attached to the pressure disc. 509807/0582509807/0582
DE2339079A 1973-08-02 1973-08-02 Heat control system for epidiascope - uses combination of heat reflector and absorber between lamp and stage Pending DE2339079A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE2339079A DE2339079A1 (en) 1973-08-02 1973-08-02 Heat control system for epidiascope - uses combination of heat reflector and absorber between lamp and stage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2339079A DE2339079A1 (en) 1973-08-02 1973-08-02 Heat control system for epidiascope - uses combination of heat reflector and absorber between lamp and stage

Publications (1)

Publication Number Publication Date
DE2339079A1 true DE2339079A1 (en) 1975-02-13

Family

ID=5888631

Family Applications (1)

Application Number Title Priority Date Filing Date
DE2339079A Pending DE2339079A1 (en) 1973-08-02 1973-08-02 Heat control system for epidiascope - uses combination of heat reflector and absorber between lamp and stage

Country Status (1)

Country Link
DE (1) DE2339079A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3216224A1 (en) * 1982-04-30 1983-11-03 Klaus Georg 7800 Freiburg Krieger Epidiascope
WO1984003350A1 (en) * 1983-02-18 1984-08-30 Terminal Data Corp Lamphouse
US5227821A (en) 1987-04-30 1993-07-13 Nview Corporation Liquid crystal display for projection systems
US5255029A (en) 1987-04-30 1993-10-19 Nview Corporation Liquid crystal display for projection systems

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3216224A1 (en) * 1982-04-30 1983-11-03 Klaus Georg 7800 Freiburg Krieger Epidiascope
WO1984003350A1 (en) * 1983-02-18 1984-08-30 Terminal Data Corp Lamphouse
US5227821A (en) 1987-04-30 1993-07-13 Nview Corporation Liquid crystal display for projection systems
US5255029A (en) 1987-04-30 1993-10-19 Nview Corporation Liquid crystal display for projection systems
US5404185A (en) 1987-04-30 1995-04-04 Nview Corporation Liquid crystal display for projection systems

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