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
Links
- 239000000463 material Substances 0.000 description 2
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Landscapes
- Optical Elements Other Than Lenses (AREA)
Description
<Desc/Clms Page number 1>
Photometer.
EMI1.1
<Desc/Clms Page number 2>
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.
<Desc / Clms Page number 1>
Photometer.
EMI1.1
<Desc / Clms Page number 2>
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)
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) |
-
1930
- 1930-09-13 AT AT129999D patent/AT129999B/en active
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