Construction unit for two beam photometers

US3932041A · kind A · utility

Assignee

• Hartmann & Braun Aktiengesellschaft · DE

Inventors

• Joachim Staab · Frankfurt am Main, DE
• Willy Apel · Frankfurt, DE
• Achim Drager
• Wilhelm-Rudiger Haberditz
• Walter Fabinksi

Key dates

• Filing date: Jan 6, 1975
• Grant date: Jan 13, 1976
• Expiry date: Jan 6, 1995

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N21/37
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A cylindrical block is provided with two ducts, forming a V whose legs terminate in exit windows in one axial end face of the block. A light source is disposed in the bottom of the V to direct light into both ducts. The block is further traversed by a bore, terminating as to one end in between the windows, avoiding the ducts and terminating in an offset position relative to the V-bottom and the light source at the other end of the block. A shaft traverses this bore for rotating a shutter in front of the windows. A complementary, light receiving unit is disposed with misaligned entrance windows in front of the unit windows, but their centers are traversed respectively by the optical axes of the ducts.