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US 4,832,490 AGranted
Photometer
AssigneeLeybold-Heraeus GmbH
InventorsMichael Boos, Werner Klug, Alfons Zoller
Life of this patent
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Abstract
A photometer in which a measuring phase, a reference phase and a dark phase are produced by means of a chopper. These phases are staggered in time, so that a single detector can be provided for all phases. In the photometer the object to be measured is situated between two light conductors, the one light conductor leading to the detector and the other light conductor leading to the chopper input. The chopper output is carried by an additional light conductor to the detector.
Claims17
A photometer comprising:
- a light source;
- a detector;
- a light chopper having at least on chopper disk having at least one cut-out for light transmission;
- and
- first, second and third light conductor devices having a plurality of first ends of said second and third light conductor devices together facing said detector and having a plurality of second ends of said first and third light conductor devices together facing of said first and second light conductor devices between which third ends an object to be measured is disposed;
- said first light conductor device having one end facing the object to be measured and said third light conductor device having an end facing the detector forming a gap between said second ends which is coaxial with said first and third light conductor devices adjacent said second ends and in which said light source is disposed and in which at least one of said chopper disks is introduced at least for a time.
3 more elements
A photometer comprising:
- a light source;
- a detector;
- a light chopper having at least one chopper disk having at least one cut-out for light transmission;
- and
- first, second and third light conductor devices having a plurality of first ends of said second and third light conductor devices together facing said detector and having a plurality of second ends of said first and third light conductor devices together facing said light source and having a plurality of third ends of said first and second light conductor devices between which third ends an object to be measured is disposed;
- said first light conductor device having one end facing the object to be measured and said third light conductor device having an end facing the detector forming a gap between said second ends which is coaxial with said first and third light conductor devices adjacent said second ends and in which said light source is disposed and in which at least one of said chopper disks is introduced at least for a time;
- said photometer having two chopper disks and said light source being disposed between said two chopper disks;
- and each chopper disk having a cut-out of 120.degree. which does not overlap with the cut-out of each other chopper disk.
5 more elements
Dependencies are inferred from the claim text.