DE579857C - Projector for incident light - Google Patents

Projector for incident light

Info

Publication number
DE579857C
DE579857C DEZ19647D DEZ0019647D DE579857C DE 579857 C DE579857 C DE 579857C DE Z19647 D DEZ19647 D DE Z19647D DE Z0019647 D DEZ0019647 D DE Z0019647D DE 579857 C DE579857 C DE 579857C
Authority
DE
Germany
Prior art keywords
projector
incident light
mirror
opposite
etched
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
DEZ19647D
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.)
Zeiss Ikon AG
Original Assignee
Zeiss Ikon AG
Publication date
Priority to DEZ19647D priority Critical patent/DE579857C/en
Application granted granted Critical
Publication of DE579857C publication Critical patent/DE579857C/en
Expired 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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Overhead Projectors And Projection Screens (AREA)

Description

Zeiss Ikon Akt.-Ges. in Dresden Bildwerfer für Auf lichtZeiss Ikon Akt.-Ges. in Dresden image projector for incident light

Patentiert im Deutschen Reiche vom 17. Oktober 1931 abPatented in the German Empire on October 17, 1931

Bei episkopischen Projektionsapparaten, bei denen gegenüber der Projektionslampe ein Planspiegel zur Aufhellung des episkopischen Projektionsobjektes angebracht ist, ist der Nachteil vorhanden, daß durch diesen Spiegel auf dem Projektionsschirm eine scharf abgegrenzte Beleuchtungszone entsteht.In the case of episcopic projection apparatus, in which one opposite the projection lamp The plane mirror is attached to brighten up the episcopic projection object The disadvantage is that this mirror on the projection screen is sharp delimited lighting zone is created.

Um diese störende Erscheinung zu beseitigen, werden erfindungsgemäß- die beiden Seitenränder dieses Spiegels schwach angeblasen oder geätzt, so daß er an diesen Stellen diffus reflektiert und die obenerwähnten Beleuchtungsunterschiede hierdurch für das Auge auf dem Projektionsschirm nicht mehr wahrnehmbar sind.In order to eliminate this annoying phenomenon, according to the invention, the two side edges this mirror is weakly blown or etched so that it is diffuse at these points reflected and the above-mentioned differences in lighting as a result for the eye are no longer noticeable on the projection screen.

In der Zeichnung ist die Erfindung in einem Ausführungsbeispiel dargestellt. 1 ist der der Projektionslampe gegenüberliegende Beleuchtungsspiegel, welcher an seinen seitlichen Rändernd und 3 schwach angeblasen oder geätzt ist. Zu beiden Seiten dieses Spiegels befindet sich in bekannter Weise je ein weiterer Beleuchtungsspiegel, 4 ist der Objekttisch des Bildwerfers.In the drawing, the invention is shown in one embodiment. 1 is the the Projection lamp opposite illumination mirror, which at its side edges and 3 is lightly blown or etched. Located on either side of this mirror In a known manner, there is a further illuminating mirror, 4 is the object table of the projector.

Claims (1)

Patentanspruch:Claim: Bildwerfer für Auflicht, bei dem auf drei Seiten des Ob jekttisches ebene Beleuchtungsspiegel vorgesehen sind, von denen der mittlere der Lichtquelle gegenüberliegt, dadurch gekennzeichnet, daß der der Lampe gegenüberliegende Spiegel (1) an den beiden seitlichen Rändern (2, 3) schwach angeblasen oder geätzt ist.Projector for incident light, with the level illuminating mirror on three sides of the object table are provided, of which the middle of the light source is opposite, characterized in that the Mirror opposite the lamp (1) on the two side edges (2, 3) is lightly blown or etched. Hierzu 1 Blatt Zeichnungen1 sheet of drawings
DEZ19647D Projector for incident light Expired DE579857C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEZ19647D DE579857C (en) Projector for incident light

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEZ19647D DE579857C (en) Projector for incident light

Publications (1)

Publication Number Publication Date
DE579857C true DE579857C (en) 1933-07-01

Family

ID=7624927

Family Applications (1)

Application Number Title Priority Date Filing Date
DEZ19647D Expired DE579857C (en) Projector for incident light

Country Status (1)

Country Link
DE (1) DE579857C (en)

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