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AT129999B - Photometer. - Google Patents

Photometer.

Info

Publication number
AT129999B
AT129999B AT129999DA AT129999B AT 129999 B AT129999 B AT 129999B AT 129999D A AT129999D A AT 129999DA AT 129999 B AT129999 B AT 129999B
Authority
AT
Austria
Prior art keywords
photometer
luminous
openings
opening
plate
Prior art date
Application number
Other languages
German (de)
Inventor
Friedrich Dr Reiss
Original Assignee
Friedrich Dr Reiss
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 Friedrich Dr Reiss filed Critical Friedrich Dr Reiss
Application granted granted Critical
Publication of AT129999B publication Critical patent/AT129999B/en

Links

Landscapes

  • Optical Elements Other Than Lenses (AREA)

Description

  

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  Photometer. 
 EMI1.1 
 

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 wird, oder es kann der ganze Teil des Gehäuses, in dem die Leuchtscheibe samt Absorptionsmittel befestigt ist, drehbar in bezug auf den Okularteil ausgestattet werden und aussen eine Belichtungsskala, entsprechend der Absorption der einzelnen Öffnungen tragen. Im Innern des Okularteiles befindet sich ein beliebig gestalteter Index, auf den die verschwimmende Öffnung mit der der Leuchtfläche gleichen Lichtintensität eingestellt wird, wobei die aussen angebrachte Belichtungsskala mit der   Blenden- bzw. Empfindlichkeìtsskala   korrespondiert, und so eine unmittelbare Ablesung der für jede Blende gültigen Belichtungszeit gestattet. 



   PATENT-ANSPRÜCHE :
1. Photometer zur Durchführung des Verfahrens nach dem Patent Nr. 127081 mit Verdunkelungsmitteln, wie abgestuften Graufiltern,   Graukeilen   od. dgl., dadurch gekennzeichnet, dass in der als Leuchtscheibe ausgebildeten Leuchtmasse mehrere Öffnungen vorgesehen sind, die-durch hinter ihnen befestigte   Verdunkelungsmittel verschiedene Lichtintensitäten durchlassen.   wobei die   Lichtintensität   jener Öffnung, die sich von der Intensität der Leuchtmasse am wenigsten unterscheidet, der Auswertung mittels Tabellen und Skalen zugrunde gelegt wird.



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  Photometer.
 EMI1.1
 

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 or the entire part of the housing in which the luminous disc including the absorbent is attached can be equipped to be rotatable with respect to the eyepiece part and has an exposure scale on the outside according to the absorption of the individual openings. Inside the eyepiece part there is an arbitrarily designed index to which the blurring opening is set with the same light intensity as the luminous area, whereby the exposure scale attached to the outside corresponds to the aperture or sensitivity scale, and thus an immediate reading of the exposure time valid for each aperture allowed.



   PATENT CLAIMS:
1. Photometer for carrying out the method according to patent no. 127081 with darkening means, such as graded gray filters, gray wedges or the like, characterized in that several openings are provided in the luminous material designed as a luminous disc, which-through darkening means attached behind them, different light intensities let through. The light intensity of the opening that differs least from the intensity of the luminous material is used as the basis for the evaluation using tables and scales.

 

Claims (1)

2. Photometer nach Anspruch 1, dadurch gekennzeichnet, dass jeder Öffnung eine Sonnenblende zugeordnet ist, indem eine undurchsichtige Platte von entsprechender Dicke mit den Öffnungen in der Leuchtfarbe korrespondierende Öffnungen trägt, deren Durchmesser durch den gewünschten Bildwinkel und die Dicke der Platte gegeben sind. 2. Photometer according to claim 1, characterized in that a sun visor is assigned to each opening, in that an opaque plate of appropriate thickness carries openings corresponding to the openings in the luminous color, the diameter of which is given by the desired angle of view and the thickness of the plate.
AT129999D 1930-04-04 1930-09-13 Photometer. AT129999B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT127081T 1930-04-04
AT129999T 1930-09-13

Publications (1)

Publication Number Publication Date
AT129999B true AT129999B (en) 1932-10-25

Family

ID=29402681

Family Applications (1)

Application Number Title Priority Date Filing Date
AT129999D AT129999B (en) 1930-04-04 1930-09-13 Photometer.

Country Status (1)

Country Link
AT (1) AT129999B (en)

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