DE669176C - Illumination of a room with windows, imperceptible from the outside - Google Patents

Illumination of a room with windows, imperceptible from the outside

Info

Publication number
DE669176C
DE669176C DEI49246D DEI0049246D DE669176C DE 669176 C DE669176 C DE 669176C DE I49246 D DEI49246 D DE I49246D DE I0049246 D DEI0049246 D DE I0049246D DE 669176 C DE669176 C DE 669176C
Authority
DE
Germany
Prior art keywords
windows
outside
imperceptible
illumination
room
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
DEI49246D
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.)
IG Farbenindustrie AG
Original Assignee
IG Farbenindustrie AG
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 IG Farbenindustrie AG filed Critical IG Farbenindustrie AG
Priority to DEI49246D priority Critical patent/DE669176C/en
Application granted granted Critical
Publication of DE669176C publication Critical patent/DE669176C/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
    • B60Q1/02—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments
    • B60Q1/04—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights
    • B60Q1/14—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights having dimming means
    • 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
    • F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
    • F21V9/08—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters for producing coloured light, e.g. monochromatic; for reducing intensity of light
    • 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
    • F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
    • F21V9/20—Dichroic filters, i.e. devices operating on the principle of wave interference to pass specific ranges of wavelengths while cancelling others

Description

Von außen nicht wahrnehmbare Beleuchtung eines mit Fenstern versehenen Raumes Es ist bereits ein Verfahren zum Abblenden von erleuchteten Gebäuden bekannt, welches darauf beruht, daß man den Fenstern und den Lichtquellen verschiedene Farben gibt, deren Absorptionsspektren sich ergänzen. So ist beispielsweise vorgeschlagen worden, die Fenster mit einer grünen Farbe und die als Lichtquelle verwendeten Lampen mit einem roten Schirm zu versehen. Dieses Verfahren weist jedoch den empfindlichen Nachteil auf, daß für die Fenster gefärbte Gläser zur Andendung kommen müssen, welche nur die entsprechend farbigen Strahlen des Tageslichtes hindurchlassen.Illumination of one with windows, imperceptible from the outside There is already a known method for dimming illuminated buildings, which is based on the fact that the windows and the light sources have different colors whose absorption spectra complement each other. For example, it is suggested the windows with a green color and the lamps used as a light source to be provided with a red umbrella. However, this method has the most delicate The disadvantage that colored glasses have to be used for the windows, which ones let through only the appropriately colored rays of daylight.

Es wurde nun gefunden, daß man auch bei Verwendung völlig farbloser Gläser eine von außen nicht sichtbare Raumbeleuchtung bewirken kann, wenn man als Lichtquelle eine nur in der Wellenlänge von 589 mA strahlende Natriumdampflampe und als Fenster ein Glas verwendet, welches Didymsalze enthält. Ein Didymglas hat für fast alle im Tageslicht enthaltenen Wellenlängen eine hohe Durchlässigkeit, so daß das Tageslicht nur unwesentlich geschwächt, der Raum also nur unwesentlich schwächer als bei Verwendung von Fenstern aus gewöhnlichem Glas beleuchtet wird. Nur in dem Spektralbezirk in der Umgebung der Wellenlänge 589 my besitzen derartige Gläser eine ungewöhnlich hohe Absorption, so daß die Durchlässigkeit für Natriumlicht durch passende Wahl der Glasdicke leicht auf r % oder weniger gegenüber der Durchlässigkeit für Tageslicht gebracht werden kann, ohne daß die Fenster für Tageslicht eine störend hohe Absorption besitzen.It has now been found that even when completely colorless glasses are used, room lighting that is not visible from the outside can be achieved if a sodium vapor lamp emitting only at a wavelength of 589 mA is used as the light source and a glass which contains didymium salts is used as the window. Didym glass has a high permeability for almost all wavelengths contained in daylight, so that daylight is only insignificantly weakened, so the room is only slightly weaker than when using windows made of ordinary glass. Only in the spectral region in the vicinity of the wavelength 589 my have such glasses an unusually high absorption, so that the transmittance for sodium light can easily be reduced to r % or less compared to the transmittance for daylight by a suitable choice of the glass thickness, without the windows for Daylight has a disruptive high absorption.

Claims (1)

PATENTANSPRUCH: Von außen nicht wahrnehmbare Beleuchtung eines mit Fenstern versehenen Raumes, gekennzeichnet durch die Verwendung einer Natriumdampflampe als Lichtquelle sowie von Fensterscheiben aus didymhaltigen Glassorten.PATENT CLAIM: Illumination of one with imperceptible from the outside Windowed room, characterized by the use of a sodium vapor lamp as a light source as well as window panes made of didymium-containing types of glass.
DEI49246D 1934-03-14 1934-03-14 Illumination of a room with windows, imperceptible from the outside Expired DE669176C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEI49246D DE669176C (en) 1934-03-14 1934-03-14 Illumination of a room with windows, imperceptible from the outside

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEI49246D DE669176C (en) 1934-03-14 1934-03-14 Illumination of a room with windows, imperceptible from the outside

Publications (1)

Publication Number Publication Date
DE669176C true DE669176C (en) 1938-11-28

Family

ID=7192515

Family Applications (1)

Application Number Title Priority Date Filing Date
DEI49246D Expired DE669176C (en) 1934-03-14 1934-03-14 Illumination of a room with windows, imperceptible from the outside

Country Status (1)

Country Link
DE (1) DE669176C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE743215C (en) * 1940-06-25 1943-12-20 Dr Phil Rudolf Sewig Device for making the work area visible when working with glowing bodies

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE743215C (en) * 1940-06-25 1943-12-20 Dr Phil Rudolf Sewig Device for making the work area visible when working with glowing bodies

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