DE191075C - - Google Patents

Info

Publication number
DE191075C
DE191075C DE1906191075D DE191075DD DE191075C DE 191075 C DE191075 C DE 191075C DE 1906191075 D DE1906191075 D DE 1906191075D DE 191075D D DE191075D D DE 191075DD DE 191075 C DE191075 C DE 191075C
Authority
DE
Germany
Prior art keywords
selenium
cell
light source
resistance
measuring
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
DE1906191075D
Other languages
German (de)
English (en)
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 filed Critical
Application granted granted Critical
Publication of DE191075C publication Critical patent/DE191075C/de
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/10—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void
    • G01J1/20—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void intensity of the measured or reference value being varied to equalise their effects at the detectors, e.g. by varying incidence angle
    • G01J1/34—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void intensity of the measured or reference value being varied to equalise their effects at the detectors, e.g. by varying incidence angle using separate light paths used alternately or sequentially, e.g. flicker
    • G01J1/36—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void intensity of the measured or reference value being varied to equalise their effects at the detectors, e.g. by varying incidence angle using separate light paths used alternately or sequentially, e.g. flicker using electric radiation detectors

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
DE1906191075D 1906-04-20 1906-04-20 Expired DE191075C (enExample)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE191075T 1906-04-20

Publications (1)

Publication Number Publication Date
DE191075C true DE191075C (enExample) 1907-10-28

Family

ID=34624840

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1906191075D Expired DE191075C (enExample) 1906-04-20 1906-04-20

Country Status (1)

Country Link
DE (1) DE191075C (enExample)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1266539B (de) * 1958-12-15 1968-04-18 Saint Gobain Vergleichsstrahlungspyrometer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1266539B (de) * 1958-12-15 1968-04-18 Saint Gobain Vergleichsstrahlungspyrometer

Similar Documents

Publication Publication Date Title
DE1548292A1 (de) Messvorrichtung
DE191075C (enExample)
DE2113477A1 (de) Optischer Abtaster und Messanordnungen mit solchen optischen Abtastern
DE599699C (de) Einrichtung zur Messung, UEberwachung oder selbsttaetigen Drehzahlreglung mittels lichtelektrischer Zelle
DE671907C (de) Einrichtung zur optischen Anzeige des Resonanzpunktes einer gewuenschten Frequenz fuer auf einen Frequenzbereich abstimmbare Empfaenger
DE740967C (de) Einrichtung zur wechselweisen Vorfuehrung von in getrennten Schauraeumen hinter durchscheinenden Spiegeln fest oder beweglich untergebrachten Schaugegenstaenden
DE472982C (de) Anzeigevorrichtung zur UEberwachung von Betriebszustaenden in grossen Anlagen
DE1863257U (de) Lichtelektrische abtasteinrichtung.
DE1473776A1 (de) Messmikroskop der nicht beruehrenden Art
DE456913C (de) Optisches Pyrometer mit einer Gluehlampe als Vergleichslichtquelle
DE706101C (de) Direkt anzeigender Peiler
DE2802684C2 (de) Meßanzeigegerät
DE525691C (de) Verfahren und Vorrichtung zur Messung von Helligkeiten
DE910662C (de) Vorrichtung zur Pruefung und Justierung von Signal-Einrichtungen, insbesondere des Eisenbahn-Sicherungswesens
DE972638C (de) Einrichtung zur Messung von Entfernungen nach dem Echolotverfahren
DE2239959A1 (de) Verfahren und vorrichtung zum pruefen der lichtstaerke und lichtverteilung von scheinwerfern
DE2330765A1 (de) Beleuchtungseinrichtung fuer skalenzeiger
DE193170C (enExample)
DE196170C (enExample)
DE531264C (de) Anordnung zur lichtelektrischen Aufnahme von diffus reflektiertem Licht
DE632386C (de) Farbmesser fuer Weissgehalte von Koerperfarben
DE3110073A1 (de) Einrichtung zur weg-, geschwindigkeits- und/oder abstandsmessung
DE373069C (de) Anordnung zum Messen der Intensitaet des ultravioletten Lichtes
DE1173267B (de) Vorrichtung zum lichtelektrischen Betaetigen von Grenzwertkontakten und zum Beleuchten der Anzeigemittel bei Zeigereinbauinstrumenten
DE1883592U (de) Lichtelektrische abtastvorrichtung.