AT151437B - Optical light meter. - Google Patents

Optical light meter.

Info

Publication number
AT151437B
AT151437B AT151437DA AT151437B AT 151437 B AT151437 B AT 151437B AT 151437D A AT151437D A AT 151437DA AT 151437 B AT151437 B AT 151437B
Authority
AT
Austria
Prior art keywords
mirror
gray wedge
observed
housing
aperture
Prior art date
Application number
Other languages
German (de)
Inventor
Ernst Jun Pless
Original Assignee
Ernst Jun Pless
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 Ernst Jun Pless filed Critical Ernst Jun Pless
Application granted granted Critical
Publication of AT151437B publication Critical patent/AT151437B/en

Links

Landscapes

  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
  • Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
  • Optical Elements Other Than Lenses (AREA)

Description

  

   <Desc/Clms Page number 1> 
 
 EMI1.1 
 
Gegenstand der Erfindung ist ein optischer Belichtungsmesser, der ein oder mehrere Spiegel aufweist, auf dem das Spiegelbild des zu beobachtenden Graukeiles od. dgl. erscheint und   dureh   ein Schauloch wahrgenommen werden kann. Das Schauloch zur Beobachtung des Objektes ist nicht in der Lichteinfallsrichtung angeordnet. 

**WARNUNG** Ende DESC Feld kannt Anfang CLMS uberlappen**.



   <Desc / Clms Page number 1>
 
 EMI1.1
 
The subject of the invention is an optical exposure meter which has one or more mirrors on which the mirror image of the gray scale or the like to be observed appears and can be perceived through a viewing hole. The viewing hole for observing the object is not arranged in the direction of incidence of light.

** WARNING ** End of DESC field may overlap beginning of CLMS **.

Claims (1)

In der Zeichnung ist ein Ausführungsbeispiel des Erfindungsgegenstandes veranschaulicht : 1 in. t das Gehäuse, 15 ein Verstellring, mittels dem der Graukeil 76 verstellt wird. 17 it ein Ziffernblatt, das die Blendengrösse trägt. 18 ist eine undurchsichtige Scheibe, die nur eine Strahlungs- öffnung gegenüber Spiegel 10 besitzt. Der Belichtungsmesser wird in der Richtung der Achse gegen den zu beobachtenden Gegenstand gehalten, während durch das Schauloch 9 in der Pfeilrichtung das Spiegelbild des Graukeiles beobachtet wird. Dadurch, dass nicht direkt, sondern über den Spiegel die Beobachtung erfolgt, kann die sonst lästige Augenmuschel entfallen. An exemplary embodiment of the subject matter of the invention is illustrated in the drawing: 1 in. T the housing, 15 an adjusting ring by means of which the gray wedge 76 is adjusted. 17 it is a dial that bears the size of the aperture. 18 is an opaque pane which has only one radiation opening opposite mirror 10. The exposure meter is held in the direction of the axis against the object to be observed, while the mirror image of the gray wedge is observed through the viewing hole 9 in the direction of the arrow. Because the observation is not carried out directly but via the mirror, the otherwise annoying eyecup can be omitted. Die Ablesung erfolgt bei dieser Anordnung in der Weise, dass der Graukeil und das mit diesem verbundene Zifferblatt so lauge verschoben wird, bis die erste Ziffer den durch das Schauloeh Beobachtenden im Spiegel 10 deutlich erscheint. Diese Ziffer gibt die Blendengrösse an, und auf dem Gehäuse kann dann leicht für die ; e Blendengrösse bei der entsprechenden Plattenempfindlichkeit die Belichtungszeit festgestellt werden PATENT-ANSPRUCH : EMI1.2 aufweist, auf denen das Spiegelbild des zu beobachtenden Graukeiles od. dgl. erscheint und durch ein Schauloch wahrgenommen werden kann. EMI1.3 **WARNUNG** Ende CLMS Feld Kannt Anfang DESC uberlappen**. With this arrangement, the reading takes place in such a way that the gray wedge and the dial connected to it are shifted until the first digit appears clearly in the mirror 10 to those observing through the eye. This number indicates the aperture size, and on the housing it is easy for the; e aperture size with the corresponding plate sensitivity the exposure time can be determined PATENT CLAIM: EMI1.2 has, on which the mirror image of the gray wedge to be observed or the like. Appears and can be perceived through a peephole. EMI1.3 ** WARNING ** End of CLMS field may overlap beginning of DESC **.
AT151437D 1936-10-23 1936-08-06 Optical light meter. AT151437B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT153689T 1936-10-23

Publications (1)

Publication Number Publication Date
AT151437B true AT151437B (en) 1937-11-10

Family

ID=29408407

Family Applications (2)

Application Number Title Priority Date Filing Date
AT151437D AT151437B (en) 1936-10-23 1936-08-06 Optical light meter.
AT153689D AT153689B (en) 1936-10-23 1936-10-23 Optical light meter.

Family Applications After (1)

Application Number Title Priority Date Filing Date
AT153689D AT153689B (en) 1936-10-23 1936-10-23 Optical light meter.

Country Status (1)

Country Link
AT (2) AT151437B (en)

Also Published As

Publication number Publication date
AT153689B (en) 1938-06-25

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