DE1932881U - Drehblende. - Google Patents

Drehblende.

Info

Publication number
DE1932881U
DE1932881U DEH50696U DEH0050696U DE1932881U DE 1932881 U DE1932881 U DE 1932881U DE H50696 U DEH50696 U DE H50696U DE H0050696 U DEH0050696 U DE H0050696U DE 1932881 U DE1932881 U DE 1932881U
Authority
DE
Germany
Prior art keywords
polarization
rotary
luminous flux
filters
rotatable
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
DEH50696U
Other languages
English (en)
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.)
Hagenuk Vorm Neufeldt and Kuhnke GmbH
Original Assignee
Hagenuk Vorm Neufeldt and Kuhnke GmbH
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 Hagenuk Vorm Neufeldt and Kuhnke GmbH filed Critical Hagenuk Vorm Neufeldt and Kuhnke GmbH
Priority to DEH50696U priority Critical patent/DE1932881U/de
Publication of DE1932881U publication Critical patent/DE1932881U/de
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/28—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising
    • G02B27/281—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising used for attenuating light intensity, e.g. comprising rotatable polarising elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V14/00—Controlling the distribution of the light emitted by adjustment of elements
    • F21V14/08—Controlling the distribution of the light emitted by adjustment of elements by movement of the screens or filters
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
    • G02B26/02—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the intensity of light
    • G02B26/023—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the intensity of light comprising movable attenuating elements, e.g. neutral density filters
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/006—Filter holders

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)

Description

H Ä ß E H U I
vorrnoli.
NEUFELOT & KUHNKE G.M.E
ICSEL

Claims (2)

Schutzansprüche
1. Drehblende zur wahlweisen Vergrößerung oder Verkleinerung des sie durchsetzenden Lichtstromes zwecks Verdunkelung der Helligkeit von Anzeige- oder Merklampen, bestehend aus einem feststehenden und einem achsengleich angeordneten drehbaren Teil, gekennzeichnet durch zwei in den Lichtstrom geschaltete Polarisationsfilter (5, 6), von denen das eine in dem feststehenden (i) und das andere in dem drehbaren (4) Teil der Blende so angeordnet ist, daß sich die Polarisationsebenen beider Filter bei Betätigung der Drehblende gegeneinander verdrehen.
2. Drehblende nach Anspruch 1, dadurch gekennzeichnet, daß als Polarisationsfilter an sich bekannte, entsprechend präparierte lichtdurchlässige Plättchen verwendet sind.
3· Drehblende nach Anspruch 1 und 2, dadurch gekennzeichnet, daß sie wasserdicht ausgebildet ist.
DEH50696U 1964-12-24 1964-12-24 Drehblende. Expired DE1932881U (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEH50696U DE1932881U (de) 1964-12-24 1964-12-24 Drehblende.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEH50696U DE1932881U (de) 1964-12-24 1964-12-24 Drehblende.

Publications (1)

Publication Number Publication Date
DE1932881U true DE1932881U (de) 1966-02-17

Family

ID=33341007

Family Applications (1)

Application Number Title Priority Date Filing Date
DEH50696U Expired DE1932881U (de) 1964-12-24 1964-12-24 Drehblende.

Country Status (1)

Country Link
DE (1) DE1932881U (de)

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